Qy State of the Regional Water System Report — CleanPowerSF Sfpuc Commission, December 13, 2022 (part 1 of 2)

San Francisco Public Utilities Commission November 2022 San Francisco Public Utilities Commission
2022 State of the Regional Water System Report
State of the
Regional Water System

November 2022

San Francisco Public Utilities Commission November 2022 San Francisco Public Utilities Commission
2022 State of the Regional Water System Report
List of Contributors:

Manouchehr Boozarpour
Tracy Cael
Joe Carlevaris
Jason Chen
John Chester
Angela Cheung
Jacquelyne Cho
Eric Choi
Amelia Clark
Fonda Davidis
Andrew DeGraca
Alexis Dufour
Anna Fedman
Stacie Feng
Josh Gale
Jeffrey K Harp
Whay Ne Ho
Nancy Hom
Margaret Hannaford
Jowin Jung
Tom Walker
Chris Graham
Ted Allen
Annie Li
Raymond Mah
Nicholas Martin
Adam Mazurkiewicz
Katie Miller
Tim Ramirez
Scott Riley
Brian Rolley
Enio Sebastiani
Eddy So
Shailen Talati
Mike Williams
Alan Wong
Derrick Wong
Nicole Yturralde
Anthony Yu

San Francisco Public Utilities Commission November 2022  i San Francisco Public Utilities Commission
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Table of Contents

1. Introduction and Overview ............................................................................................................. 1

2. Asset Management Policy and Capital Planning Process ......................................................... 8

2.1.1 Water Enterprise’s Implementation of the SFPUC Asset Management Policy ........... 8

2.1.2 Level of Service History and Objectives ......................................................................... 13

2.2.1 Capital Planning Process Overview ................................................................................ 15

2.2.2 Capital Prioritization Process Overview ......................................................................... 18

2.2.3 Optimizing and Balancing the 10-Year Capital Improvement Plan ........................... 18

3. Asset Management Program Status ............................................................................................. 20

4. Asset Description, Maintenance and Condition, and Capital Improvements .................... 27

4.1.1 Hetch Hetchy Water .......................................................................................................... 27

4.1.2 Regional Water ................................................................................................................... 36

4.2.1 Hetch Hetchy Water .......................................................................................................... 44

4.2.2 Regional Water ................................................................................................................... 44

4.3.1 Hetch Hetchy Water .......................................................................................................... 56

4.3.2 Regional Water ................................................................................................................... 72

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4.4.1 Hetch Hetchy Water ........................................................................................................ 107

4.4.2 Regional Water ................................................................................................................. 110

4.5.1 Hetch Hetchy Water ........................................................................................................ 113

4.5.2 Regional Water ................................................................................................................. 117

4.6.1 Hetch Hetchy Water ........................................................................................................ 121

4.7.1 Hetch Hetchy Water ........................................................................................................ 127

4.8.1 Hetch Hetchy Water ........................................................................................................ 135

4.8.2 Regional Water ................................................................................................................. 140

4.9.1 Hetch Hetchy Water ........................................................................................................ 145

4.9.2 Regional Water ................................................................................................................. 150

4.10.1 Hetch Hetchy Water ........................................................................................................ 154

4.11.1 Hetch Hetchy Water Upcountry Communication Sites ............................................. 158

4.11.2 Radio .................................................................................................................................. 158

4.11.3 Telephone .......................................................................................................................... 159

4.11.4 SCADA .............................................................................................................................. 159

4.11.5 On-Line Monitoring Program Review .......................................................................... 159

4.11.6 Capital Improvements ..................................................................................................... 160

5. Regulatory Compliance ............................................................................................................... 162

5.1.1 LCRR .................................................................................................................................. 162

5.1.2 Total Coliform Rule .......................................................................................................... 163

5.1.3 Per- and Polyfluoroalkyl Substances ............................................................................. 163

5.1.4 Unregulated Contaminant Monitoring Rule ................................................................ 164

5.1.5 Other Revisions ................................................................................................................ 164

5.1.6 Drinking Water Permit Compliance .............................................................................. 165

5.2.1 National Pollutant Discharge Elimination System Permit Compliance ................... 166

5.2.2 California Unified Program Compliance (Hazardous Waste and Materials).......... 166

5.3.1 Dam Safety Program ........................................................................................................ 171

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5.3.2 DSOD Inspections ............................................................................................................ 172

5.5.1 North American Electric Reliability Corporation/Western Electricity Coordinating Council............................................................................................................................................. 178

5.5.2 Federal Energy Regulatory Commission (FERC) ........................................................ 179

5.5.3 Wildfire Mitigation Plan .................................................................................................. 179

5.5.4 Physical Security Mitigation Plan .................................................................................. 180

6. Emerging Issues ............................................................................................................................ 181

6.1.1 Inflation and Supply Chain ............................................................................................. 181

6.1.2 Workforce Challenges ..................................................................................................... 182

6.1.3 Electrification of Vehicle Fleet ........................................................................................ 182

6.1.4 Impacts of COVID Policies and Protocols .................................................................... 182

6.1.5 Obsolete Equipment/Technology ................................................................................. 183

6.2.1 Disinfection Byproducts .................................................................................................. 184 Taste and Odor ............................................................................................................................... 184

6.2.2 Quinoline ........................................................................................................................... 185

6.2.3 Microplastics ..................................................................................................................... 185

6.2.4 Other Contaminants of Emerging Concern .................................................................. 186 Appendix A: Asset Inventory Tables ................................................................................................ 187 Appendix B: Emergency Response and Preparedness Plans ........................................................ 212 Appendix C: Pipeline Inspection Schedule ..................................................................................... 218 Appendix D: Watershed Map ............................................................................................................. 222 Appendix E: Proposed Level of Service ............................................................................................ 223

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Tables
Table 1-1: Organization of SRWS Report ................................................................................................ 7 Table 2-1: Summary of SFPUC Asset Management Guiding Principles and Water Enterprise’s Asset Management Objectives .................................................................................. 9 Table 4-1: O’Shaughnessy Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 28 Table 4-2: Cherry Valley Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 29 Table 4-3: Lake Eleanor Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 29 Table 4-4: Early Intake Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 30 Table 4-5: Priest Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................................................. 31 Table 4-6: Moccasin Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................................................. 32 Table 4-7: O’Shaughnessy Dam Outlet Works Phase I Project Milestones Completed During the Current Reporting Cycle ......................................................................................................... 33 Table 4-8: O’Shaughnessy Dam Access and Drainage Project Milestones Completed During the Current Reporting Cycle ......................................................................................................... 33 Table 4-9: Cherry Dam Spillway – Short-Term Improvements Project Milestones Completed During the Current Reporting Cycle............................................................................................ 34 Table 4-10: Moccasin Dam and Reservoir Long-Term Improvements Project Milestones Completed During the Current Reporting Cycle ....................................................................... 34 Table 4-11: Early Intake Dam Interim Improvements Project Milestones Completed During the Current Reporting Cycle ......................................................................................................... 35 Table 4-12: Early Intake Dam – Long-Term Project Milestones Completed During the Current Reporting Cycle ................................................................................................................ 35 Table 4-13: Moccasin Reservoir Perimeter Security Fence Project Milestones Completed During the Current Reporting Cycle............................................................................................ 36 Table 4-14: HHWP Water Storage Projects – Levels of Service Impacts .......................................... 36 Table 4-15: Calaveras Dam Summary (July 1, 2020, through June 30, 2022) ................................... 37 Table 4-16: Turner Dam Summary (July 1, 2020, through June 30, 2022) ........................................ 38 Table 4-17: Pilarcitos Dam Summary (July 1, 2020, through June 30, 2022) .................................... 39 Table 4-18: Lower Crystal Springs Dam Summary (July 1, 2020, through June 30, 2022) ............. 40 Tabl
e 4-19: San Andreas Dam Summary (July 1, 2020, through June 30, 2022) .............................. 41

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Table 4-20: Calaveras Reservoir Expansion Project Milestones Completed During the Current Reporting Cycle ................................................................................................................ 42 Table 4-21: Turner Dam and Reservoir Improvements Project Milestones Completed During the Current Reporting Cycle............................................................................................ 42 Table 4-22: Pilarcitos Dam Improvements Project Milestones Completed During the Current Reporting Cycle ................................................................................................................ 43 Table 4-23: San Andreas Dam Facility Improvements Project Milestones Completed During the Current Reporting Cycle ......................................................................................................... 43 Table 4-24: RWS Water Storage Projects – Levels of Service Impacts .............................................. 43 Table 4-25: Rock River Treatment Facility Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................... 44 Table 4-26: Project Milestones Completed During the Current Reporting Cycle ........................... 52 Table 4-27: Sunol Valley Water Treatment Plant Ozone Project Milestones Completed During the Current Reporting Cycle............................................................................................ 52 Table 4-28: Sunol Valley Water Treatment Plant Short-Term Improvements Project Milestones Completed During the Current Reporting Cycle ................................................... 53 Table 4-29: Long-Term Improvements Project Milestones Completed During the Current Reporting Cycle ............................................................................................................................... 53 Table 4-30: Sunol Valley Water Treatment Plant Polymer Feed Facility Project Milestones Completed During the Current Reporting Cycle ....................................................................... 54 Table 4-31: HTWTP Filter Underdrain Project Milestones Completed During the Current Reporting Cycle ............................................................................................................................... 54 Table 4-32: Regional Groundwater Treatment Improvements Project Milestones Completed During the Current Reporting Cycle............................................................................................ 55 Table 4-33: RWS Water Treatment Projects – Levels of Service Impacts ......................................... 56 Table 4-34: Canyon Power Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 57 Table 4-35: Canyon Portal Valve House Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................... 58 Table 4-36: Kirkwood Penstock Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 58 Table 4-37: Early Intake Bypass Tunnel and Pipeline Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ............................................................................................ 59 Table 4-38: Eleanor-Cherry Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 60 Table 4-39: Cherry Power Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 60

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Table 4-40: Granite Portal Valve House Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................... 61 Table 4-41: Holm Penstock Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 61 Table 4-42: Lower Cherry Aqueduct Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................... 62 Table 4-43: Mountain Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 63 Table 4-44: Moccasin Power Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................... 63 Table 4-45: West Portal Valve House Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................... 64 Table 4-46: Moccasin Penstock Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 64 Table 4-47: Foothill Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 65 Table 4-48: San Joaquin Pipelines Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 66 Table 4-49: San Joaquin Pipeline Valve Houses Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................................... 67 Table 4-50: Coast Range Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................... 67 Table 4-51: SJPL Tesla Valves Replacement Project Milestones Completed During the Current Reporting Cycle ................................................................................................................ 68 Table 4-52: SJPL Valve and Safe Entry Improvements Project Milestones Completed During the Current Reporting Cycle ......................................................................................................... 69 Table 4-53: Mountain Tunnel Improvement Project Milestones Completed During the Current Reporting Cycle ................................................................................................................ 69 Table 4-54: Kirkwood Penstock Project Milestones Completed During the Current Reporting Cycle ............................................................................................................................... 70 Table 4-55: Canyon Tunnel Rehabilitation Project Milestones Completed During the Current Reporting Cycle ................................................................................................................ 70 Table 4-56: Moccasin Penstock Rehabilitation Project Milestones Completed During the Current Reporting Cycle ................................................................................................................ 71 Table 4-57: HHWP Water Transmission Projects – Levels of Service Impacts ................................ 71 Table 4-58: Prioritization and Schedule for Cross-Connection Pipeline Assessment and Mitigation ......................................................................................................................................... 78

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Table 4-59: Cathodic Protection for Water Supply and Treatment Division Transmission Pipelines at Various Locations ...................................................................................................... 83 Table 4-60: FY21 and FY22 County Line Calibration Summary ........................................................ 86 Table 4-61: Summary of Meter Equipment Replacement, Installation, and Improvement ........... 87 Table 4-62: As-Needed Pipeline Repairs Project Milestones Completed During the Current Reporting Cycle ............................................................................................................................. 102 Table 4-63: Corrosion Control (Phase II) Project Milestones Completed During the Current Reporting Cycle ............................................................................................................................. 103 Table 4-64: San Antonio Pump Station Motor Control Center Upgrades Project Milestones Completed During the Current Reporting Cycle ..................................................................... 104 Table 4-65: San Andreas Pipeline No. 2 Replacement Project Milestones Completed During the Current Reporting Cycle ....................................................................................................... 104 Table 4-66: BDPL Nos. 1 through 4 Lining Repair Project Milestones Completed During the Current Reporting Cycle .............................................................................................................. 105 Table 4-67: BDPL No. 4 PCCP Repair Project Milestones Completed During the Current Reporting Cycle ............................................................................................................................. 105 Table 4-68: CSPL No. 2 Reach 5 Lining Replacement Project Milestones Completed During the Current Reporting Cycle ....................................................................................................... 106 Table 4-69: CSPL No. 2 Reaches 2 and 3 Rehabilitation Project Milestones Completed During the Current Reporting Cycle.......................................................................................... 106 Table 4-70: RWS Water Transmission Projects – Levels of Service Impacts .................................. 107 Table 4-71: Cherry Water Distribution System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 108 Table 4-72: O’Shaughnessy Water Distribution System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................... 108 Table 4-73: Early Intake Water Distribution System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................... 109 Table 4-74: Moccasin Water Distribution System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 110 Table 4-75: Town of Sunol Pipeline Improvement Project Milestones Completed During the Current Reporting Cycle .............................................................................................................. 112 Table 4-76: Moccasin Compound Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 114 Table 4-77: South Fork Yard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 114 Table 4-78: Oakdale Yard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................................ 115

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Table 4-79: Warnerville Yard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 115 Table 4-80: Moccasin Old Powerhouse Hazard Mitigation Project Milestones Completed During the Current Reporting Cycle.......................................................................................... 116 Table 4-81: HHWP Buildings and Grounds Projects – Levels of Service Impacts ........................ 116 Table 4-82: Rollins Road Building Renovation Project Milestones Completed During the Current Reporting Cycle .............................................................................................................. 118 Table 4-83: Millbrae Warehouse Settlement and Administration Building HVAC Project Milestones Completed During the Current Reporting Cycle ................................................. 119 Table 4-84: Millbrae Yard Laboratory and Shop Improvements Project Milestones Completed During the Current Reporting Cycle ..................................................................... 120 Table 4-85: Sunol Long-Term Improvements Project Milestones Completed During the Current Reporting Cycle .............................................................................................................. 121 Table 4-86: RWS Buildings and Grounds Projects – Levels of Service Impacts ............................ 121 Table 4-87: Holm Powerhouse Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 122 Table 4-88: Kirkwood Powerhouse Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 123 Table 4-89: Moccasin Powerhouse Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 124 Table 4-90: Other Powerhouse Projects Project Milestones Completed During the Current Reporting Cycle ............................................................................................................................. 125 Table 4-91: Moccasin Powerhouse Bypass Upgrade Project Milestones Completed During the Current Reporting Cycle ....................................................................................................... 125 Table 4-92: Moccasin Powerhouse and GSU Rehabilitation Project Milestones Completed During the Current Reporting Cycle.......................................................................................... 126 Table 4-93: HHWP Power Generation Projects – Levels of Service Impacts ................................. 127 Table 4-94: Transmission Lines 1 and 2 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................. 128 Table 4-95: Power Transmission Lines 3 and 4 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 128 Table 4-96: Power Transmission Lines 5 and 6 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 129 Table 4-97: Transmission Lines 7 and 8 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................. 129 Table 4-98: Transmission Lines 9, 10, and 11 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 130

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Table 4-99: Intake Switchyard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 131 Table 4-100: Moccasin Switchyard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 131 Table 4-101: Warnerville Substation Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................. 132 Table 4-102: Calaveras Substation Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 132 Table 4-103: Transmission Lines 7 and 8 Upgrades Project Milestones Completed During the Current Reporting Cycle ....................................................................................................... 133 Table 4-104: Warnerville Project Milestones Completed During the Current Reporting Cycle . 134 Table 4-105: Power Transmission Projects – Levels of Service Impacts ......................................... 135 Table 4-106: Holm Powerhouse to Cherry Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................. 136 Table 4-107: Cherry Dam to Cherry Valve House Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 136 Table 4-108: Kirkwood Powerhouse to O’Shaughnessy Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................... 137 Table 4-109: Mather to Cafeteria Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 137 Table 4-110: Mather to Evergreen Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 138 Table 4-111: Moccasin Powerhouse to Low Head Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 138 Table 4-112: Moccasin Powerhouse to Sewer Treatment Plant Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................ 139 Table 4-113: O’Shaughnessy to O’Shaughnessy Compound Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................ 140 Table 4-114: Calaveras Dam Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 141 Table 4-115: Calaveras Substation Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................... 141 Table 4-116: Crystal Springs Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 142 Table 4-117: Pilarcitos Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................. 142 Tabl
e 4-118: Pulgas Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................. 143

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Table 4-119: San Andreas Lake Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 143 Table 4-120: Sawyer Camp Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 144 Table 4-121: Sunol Water Temple Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................... 144 Table 4-122: Cherry Lake Road Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 145 Table 4-123: Hetch Hetchy Road Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 146 Table 4-124: O’Shaughnessy Adit Access Bridge Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 146 Table 4-125: Cherry Lake Road Bridge at Early Intake Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................... 147 Table 4-126: Cherry Lake Road Bridge at Cherry Creek Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................... 147 Table 4-127: Holm Access Bridge Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ................................................................................................................................. 148 Table 4-128: Moccasin Creek Debris Deflector Bridge Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .......................................................................................... 149 Table 4-129: Bridge Replacement (Four Bridges) Project Milestones Completed During the Current Reporting Cycle .............................................................................................................. 150 Table 4-130: Watershed, Roads, and Bridges – Levels of Service Impacts ..................................... 150 Table 4-131: EBRPD Water System Project Milestones Completed During the Current Reporting Cycle ............................................................................................................................. 152 Table 4-132: Sneath Lane Gate/San Andreas Project Milestones Completed During the Current Reporting Cycle .............................................................................................................. 152 Table 4-133: Southern Skyline Boulevard Ridge Trail Extension Project Milestones Completed During the Current Reporting Cycle ..................................................................... 153 Table 4-134: SA-1 Service Road/Ingoing Road Project Milestones Completed During the Current Reporting Cycle .............................................................................................................. 153 Table 4-135: RWS Watershed, Roads, and Bridges Projects – Levels of Service Impacts ............ 154 Table 4-136: O’Shaughnessy Wastewater System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 155 Table 4-137: Early Intake Wastewater System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) ........................................................................................................ 156 Table 4-138: Moccasin Wastewater System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) .................................................................................................................. 157

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Table 4-139: Moccasin Wastewater Treatment Plant Project Milestones Completed During the Current Reporting Cycle ....................................................................................................... 157 Table 4-140: HHWP Wastewater Treatment Project – Levels of Service Impacts ......................... 158 Table 4-141: Radio Communication Milestones Completed During the Current Reporting Cycle ............................................................................................................................................... 161 Table 4-142: Communication System Projects – Levels of Service Impacts ................................... 161 Table 5-1: Facilities in the Aboveground Storage Tank Program ................................................... 167 Table 5-2: Facilities in the California Accidental Release Prevention Program ............................ 167 Table 5-3: Facilities in the Hazardous Generator and Hazardous Material Business Plan Program .......................................................................................................................................... 168 Table 5-4: Number of SFPUC Division Facilities Enrolled in the Unified Program ..................... 169 Table A-1: Dams ..................................................................................................................................... 188 Table A-2: Groundwater Wells/Filter Galleries ................................................................................ 189 Table A-3: Supply Reservoirs ............................................................................................................... 190 Table A-4: Treated Water Storage ........................................................................................................ 190 Table A-5: Water Treatment Facilities ................................................................................................. 191 Table A-6: Water Transmission – Pipelines and Tunnels ................................................................. 192 Table A-7: Water Transmission – Pump Stations .............................................................................. 194 Table A-8: Water Transmission – Valve Lots ..................................................................................... 195 Table A-9: Water Transmission – Interties ......................................................................................... 206 Table A-10: Water Transmission – Town of Sunol Distribution System ........................................ 206 Table A-11: Watershed and Lands Management – Watersheds ...................................................... 207 Table A-12: Powerhouses ...................................................................................................................... 207 Table A-13: Penstocks ............................................................................................................................ 207 Table A-14: Watershed and Lands Management – Structures (Non-Operations) ........................ 208 Table A-15: Buildings and Watersheds – Quarries ........................................................................... 211 Tabl
e A-16: Buildings and Grounds – Corporation Yards ............................................................... 211 Table A-17: Rolling Stock ...................................................................................................................... 211 Table B-1: Relevant Emergency Response Plans for the Regional Water System ......................... 212 Table B-2: Relevant Plans for the Unified Program .......................................................................... 214

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Figures
Figure 1-1: Schematic of the Hetch Hetchy Regional Water System .................................................. 2 Figure 2-1: Mapping Each SFPUC Asset Management Guiding Principle to Multiple Asset Management Objectives for the Water Enterprise ....................................................................... 8 Figure 3-1: Asset Management Pyramid .............................................................................................. 23 Figure 4-1: Location of RGSR Groundwater Wells ............................................................................. 51 Figure 4-2: Linear Feet of Pipelines and Tunnels by Material and Installation Decade ................ 72 Figure 4-3: Cumulative Pipelines and Tunnels Inventory ................................................................. 73 Figure 4-4: Number of Valves Installed by Decade............................................................................. 75 Figure 4-5: Number of Valves Exercised at Water Supply and Treatment Division from 2011 through 2022 .................................................................................................................................... 76 Figure 4-6: Mitigation Priority Breakdowns for BDPL Nos. 1 through 5; CSPL Nos. 1, 2, and 3; SSL; Sunol Region; and CSSAPL ....................................................................................... 79 Figure 4-7: Cathodically Protected Transmission Pipeline ................................................................ 81

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List of Abbreviations
AACEI Association for the Advancement of Cost Engineering International
AAR Alternatives Analysis Report
AC alternating current
ACDD Alameda Creek Diversion Dam
ADAS automatic data acquisition system
AEP Alameda East Portal
AF acre-feet
AMI advanced meter infrastructure
AMMP Algae Monitoring and Mitigation Plan
AMP Asset Management Plan
AMSC Asset Management Steering Committee
ARV air release valve
AS Alameda Siphon
AVV air vacuum valve
AWIA America’s Water Infrastructure Act of 2018
AWP Alameda West Portal
AWWA American Water Works Association
BDPL Bay Division Pipeline
BFV butterfly valve
BHR bioregional habitat restoration
BMP best management practice
BO blowoff valve
B&V Black & Veatch
CalEPA California Environmental Protection Agency
CALPL Calaveras Pipeline
Cal OES California Governor's Office of Emergency Services Cal Water California Water Service Company
CatEx categorical exclusion
CCR California Code of Regulations
CSSAPL Crystal Springs-San Andreas Pipeline
CCSF City and County of San Francisco
CDD City Distribution Division
CDRP Calaveras Dam Replacement Project

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CEQA California Environmental Quality Act
cfs cubic feet per second
CIP Capital Improvement Program
CML cement -mortar lining
CMMS computerized maintenance management system
COF consequence of failure
CP cathodic protection
CRT Coast Range Tunnel
CSBT Crystal Springs Bypass Tunnel
CSOS Crystal Springs Outlet Structure
CSPL Crystal Springs Pipeline
CSPS Crystal Springs Pump Station
DBP disinfection byproduct
DC direct current
DDW Division of Drinking Water
DEOP Division Emergency Operations Plan
DLR detection limit for purposes of reporting
DO dissolved oxygen
D/P differential pressure
DSOD Division of Safety of Dams
DWR California Department of Water Resource
EA Engineering Archive
EAM Enterprise Asset Management
EAP emergency action plan
EBMUD East Bay Municipal Utility District
EBRPD East Bay Regional Park District
EFWS Emergency Firefighting Water System
EIR environmental impact report
EOP Emergency Operations Plan
ERP emergency response plan
FHSZ Fire Hazard Severity Zone
FIRO Forecast Informed Reservoir Operations
FRP fiberglass-reinforced plastic
FY fiscal year (July to June the following year)
GCSD Groveland Community Services District
GDR Geotechnical Data Report

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GIR Geotechnical Investigation Report
GIS geographic information system
gpm gallons per minute
GSU generator step-up
HAA5 haloacetic acids
HHWP Hetch Hetchy Water and Power
HTWTP Harry Tracy Water Treatment Plant
HVAC heating, ventilation, and air conditioning
I-680 Interstate 680
ICS Incident Command System
IFR instream flow release
IPS iron pipe straight threaded plug
ISO International Organization for Standardization
IT Information Technology
JOC job order contract
KP-OS Kirkwood Powerhouse to O’Shaughnessy
kV kilovolt
kVa kilovolt-ampere
LCA Lower Cherry Aqueduct
LCRR Lead and Copper Rule Revision
LCSD Lower Crystal Springs Dam
LCSR Lower Crystal Springs Reservoir
LLNL Lawrence Livermore National Laboratory
LMPS Lake Merced Pump Station
LOF likelihood of failure
LOS level of service
MCC motor control center
MCL maximum contaminant level
M/DBP microbial/disinfection byproduct
MG million gallons
mgd million gallons per day
μg/L micrograms per liter
MID Modesto Irrigation District
MW megawatt
N/A not applicable
NAR Needs Assessment Report

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NCSBPL New Crystal Springs Bypass Pipeline
NCSBT New Crystal Springs Bypass Tunnel
NEPA National Environmental Policy Act
NIT New Irvington Tunnel
NPDES National Pollutant Discharge Elimination System
NPS National Park Service
NRLMD Natural Resources and Lands Management Division
O&M operations and maintenance
OCB oil circuit breaker
PAC powdered activated carbon
PAPL Palo Alto Pipeline
PCCP prestressed concrete cylinder pipe
PFAS per- and polyfluoroalkyl substances
PFOA perfluorooctanoic acid
PFOS perfluorooctane sulfonate
PG&E Pacific Gas and Electric Company
PIL Pilarcitos Dam
PLC programmable logic controller
PM preventive maintenance
PMF probable maximum flood
ppb parts per billion
PRV pressure-relief valve
psi pounds per square inch
PSPS public safety power shutoff
Pulgas PS Pulgas Pump Station
PVC polyvinyl chloride
R&R rehabilitation and replacement
RCCCP Regional Cross-Connection Controls Project
RCP reinforced concrete cylinder pipe
RGSR Regional Groundwater Storage and Recovery
RMU remote monitoring unit
ROV remotely operated vehicle
ROW right-of-way
RRA risk and resilience assessment
RWS Regional Water System
SABPL San Antonio Backup Pipeline

San Francisco Public Utilities Commission November 2022  xvii San Francisco Public Utilities Commission
2022 State of the Regional Water System Report
SAMP Strategic Asset Management Plan
SAPL San Andreas Pipeline
SAPS San Antonio Pump Station
SCADA supervisory control and data acquisition
SFBOS San Francisco Board of Supervisors
SFPUC San Francisco Public Utilities Commission
SFWD San Francisco Water Department
SFWS San Francisco Water System
SJPL San Joaquin Pipeline
SMP surface mining permit
SOP standard operating procedure
sq. mi square miles
SRWS State of the Regional Water System
SSBPL Sunset Branch Pipeline
SSPL Sunset Supply Pipeline
SVCF Sunol Valley Chloramination Facility
SVWTP Sunol Valley Water Treatment Plant
SWRCB State Water Resources Control Board
TBD to be determined
T&O taste and odor
TID Turlock Irrigation District
TOSPL Town of Sunol Pipeline
TSOV turbine shut-off valve
TTF Tesla Treatment Facility
UCMR4 Fourth Unregulated Contaminant Monitoring Rule
UCMR5 Unregulated Contaminant Monitoring Rule Fifth Round UCSD Upper Crystal Springs Dam
UCSR Upper Crystal Springs Reservoir
UPS uninterruptible power supply
U.S. EPA United States Environmental Protection Agency
USFS United States Forest Service
UV ultraviolet
VFD variable frequency drive
WE (SFPUC) Water Enterprise
WEEAM Water Enterprise, Enterprise Asset Management
WQD Water Quality Division

San Francisco Public Utilities Commission November 2022  xviii San Francisco Public Utilities Commission
2022 State of the Regional Water System Report
WSA Water Supply Agreement
WSAB Wildfire Safety Advisory Board
WSIP Water System Improvement Program
WSP welded steel pipe
WSTD Water Supply and Treatment Division
Section 1 – Introduction and Overview
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  1

1. Introduction and Overview

1.1 Purpose of Report
This 2022 update of the State of the Hetch Hetchy Regional Water System (RWS) report conveys the state of the assets comprising RWS since the previous update in 2020. The report covers the period of fiscal years (FYs) 2020/21 and 2021/22 (July 2020 through June 2022). This duration is commonly referred to as the “reporting cycle” throughout this report.

This report is also used to meet a contractual requirement of the Amended and Restated Water Supply Agreement (WSA) of December 2018 between San Francisco Public Utilities Commission (SFPUC) and its wholesale water customers (Section 3.10B):

The report is made available to customers and stakeholders and is frequently used internally for reference purposes and budget preparation.

1.2 System Overview
RWS, owned and operated by SFPUC , consists of a complex se ries of reservoirs, tunnels, pipelines, pump stations, treatment plants, and power generation and transmission assets that deliver water from Sierra Nevada and Bay Area watersheds to four counties in the Bay Area.

RWS comprises two water systems that were developed independently but are operated as one.

The first is Hetch Hetchy Water, which imports water from the Tuolumne River and generates hydropower as it is transported downstream. The second is Regional Water, originally developed by the Spring Valley Water Company and purchased by the City and County of San Francisco (CCSF) in 1930.

RWS provides primary water supply for approximately 2.7 million residential, commercial, and industrial customers in San Francisco, Santa Clara, Alameda, San Mateo, San Joaquin, and Tuolumne counties. On average, 15 percent of the water delivered to SFPUC customers is derived from runoff in the Alameda and Peninsula watersheds. The remaining 85 percent comes from Sierra Nevada snowmelt and precipitation via the Tuolumne River and related facilities.

RWS is shown on Figure 1-1 and spans from the Sierra Nevada to the San Francisco Bay Area. The system begins with three storage reservoirs: Hetch Hetchy Reservoir, Lake Eleanor, and Lake Lloyd.

Hetch Hetchy Reservoir relies on O’Shaughnessy Dam to impound water along the main stem of the Tuolumne River. The Hetch Hetchy watershed is entirely within Yosemite National Park; it is almost completely a federally designated wilderness area and is only accessible by permit. Water flows by gravity from Hetch Hetchy Reservoir to downtown San Francisco through a series of tunnels, regulating reservoirs, powerhouses, treatment facilities, and pipelines.

San Francisco will submit reports to its retail and wholesale customers on the “State of the Regional Water System,” including reports on completed and planned maintenance, repair, or replacement projects or programs, by September of every even-numbered year, with reports to start in September 2010.

Section 1 – Introduction and Overview
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  2 Figure 1-1: Schematic of the Hetch Hetchy Regional Water System

Section 1 – Introduction and Overview
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  3 SFPUC’s other two impounding reservoirs in the Tuolumne River basin, Lake Eleanor and Lake Lloyd (a.k.a. Cherry Lake), are used primarily to (1 ) satisfy downstream flow obligations to Turlock Irrigation District (TID) and the Modesto Irrigation District (MID); (2) maintain minimum instream flow releases below the reservoirs; (3) produce hydroelectric power at Holm Powerhouse; and (4) provide flows for recreational use (i.e., whitewater rafting).

Although Lake Eleanor and Lake Lloyd do not normally supply water directly to the Bay Area, water stored in these reservoirs is instrumental in preserving the Bay Area’s water supply in Hetch Hetchy Reservoir. Release of water from these reservoirs can partially fulfill CCSF’s inflow obligations to TID and MID, thereby allowing water to be captured and retained in Hetch Hetchy Reservoir for delivery to the Bay Area.

Lake Eleanor is approximately 3 miles above the confluence of Eleanor Creek and Cherry Creek.

Lake Lloyd is situated on Cherry Creek, about 4 miles above the confluence with Eleanor Creek.

Lake Eleanor and Lake Lloyd are linked by a tunnel and pump facility that allows water to be transferred from Lake Eleanor to Lake Lloyd. As a result of this linkage, the two reservoirs are generally operated as a single unit.

Water that is not released to the creeks below Lake Eleanor and Lake Lloyd is diverted through Cherry Power Tunnel to Holm Powerhouse . Holm Powerhouse is situated on Cherry Creek, about 1 mile upstream of its confluence with the Tuolumne River. Water can be diverted from Lake Lloyd through Holm Powerhouse and released into Cherry Creek, directly upstream of the confluence with the Tuolumne River. These releases also support CCSF’s inflow obligations to TID and MID.

In drought conditions and with prior approval from the State Water Resources Control Board (SWRCB) Division of Drinking Water ( DDW), water from Lake Lloyd and Lake Eleanor can be diverted by Lower Cherry Diversion Dam to the Early Intake Diversion Structure on the Tuolumne River, where it would enter Mountain Tunnel to provide an alternative water source for consumption by RWS customers. When supplies from Lake Lloyd and Lake Eleanor are used, all diversions from the Tuolumne River must be filtered. These sources of upcountry, non-Hetch Hetchy water are collectively known as Upcoun try Non-Hetch Hetchy Water Supply and were approved by DDW in permit amendment No. 5 in 2016.

Water from Hetch Hetchy Reservoir is conveyed through the Canyon Power Tunnel to Kirkwood Powerhouse, where it can be used to generate power. Water from Kirkwood Powerhouse is discharged into Mountain Tunnel via the Early Intake Bypass Tunnel and Pipeline. Deliveries to Groveland Community Services District (GCSD) in Tuolumne County are made from waters pumped from Mountain Tunnel . Mountain Tunnel then conveys Hetch Hetchy water to Priest Reservoir, a regulating reservoir. From Priest Reservoir, water enters the Moccasin Power Tunnel and passes through Moccasin Powe rhouse, again generating power. Water from Moccasin Powerhouse is discharged directly to Moccasin Reservoir. The state -operated Moccasin Fish Hatchery diverts up to 30 cfs from Moccasin Reservoir.

Water stored in Priest and Moccasin r eservoirs is entirely from Hetch Hetchy Reservoir and is isolated from the surrounding watersheds by open canals, diversions, and pipelines. Local runoff that would normally flow into Priest and Moccasin r eservoirs is diverted around the reservoirs and eventually discharges to Don Pedro Reservoir.

Section 1 – Introduction and Overview
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  4 After Moccasin Reservoir, the water supply enters Foothill Tunnel via the Moccasin Reservoir Bypass or the Moccasin Gate Tower. The water is treated at the Rock River Lime Plant, along the Foothill Tunnel , to adjust the pH of the water supply by injecting slaked lime (calcium hydroxide). Foothill Tunnel terminates at Oakdale Portal, where the San Joaquin Pipelines (SJPLs) begin.

The SJPLs are three complete pipelines that cross the Central Valley, connecting Foothill Tunnel to the Coast Range Tunnel (CRT). Two additional sections of SJPL (SJPL No. 4 East and SJPL No. 4 West) allow redundancy at the ends of the SJPL s. Crossover facilities (Emery, Pelican, and Roselle) allow transfer of water between pipelines, increasing system resiliency . Throttling stations on SJPL Nos. 2 and 3, in conjunction with the crossovers, allow for any flow target between 80 and 305 mil lion gallons per day ( mgd). At the San Joaquin River Valve House, pressure-reducing valves provide pressure relief for the system and a means of drainage at the low point of the pipeline. The SJPLs terminate at the Tesla Valve House, where the water is treated at the Tesla Treatment Facility ( TTF). At TTF, water is exposed to ultraviolet ( UV) light, pH is adjusted, fluoride is added, and primary disinfection begins with the addition of chlorine.

Water then enters CRT, a 26- mile tunnel terminating at the Alameda East Portal (AEP) in the Sunol Valley in Alameda County. There is a backup disinfection station at Thomas Shaft, approximately 4.5 miles downstream of Tesla Portal. Water traveling through CRT is considered appropriately disinfected upon reaching AEP. AEP is considered the point of entry for the unfiltered Hetch Hetchy supply, in accordance with the RWS drinking water permit.

At AEP, Hetch Hetchy water is split among the four Alameda Siphons that cross the Calaveras Fault and Alameda Creek. Water then flows to the Sunol Valley Chloramination Facility (SVCF), where chlorine is boosted and ammonia is added in the Alameda Siph ons to form chloramines.

Sodium hydroxide is also added at SVCF to maintain optimal pH levels. Water then continues to the Alameda West Portal (AWP), where it enters the 3.5- mile Irvington Tunnels (Nos. 1 and 2).

Hetch Hetchy water can also be diverted to San Antonio Reservoir or the Sunol Valley Water Treatment Plant (SVWTP). The Calaveras and San Antonio Reservoirs collect local runoff from their surrounding watersheds, which adds to the overall water supply of RWS. All local reservoir water in the East Bay is conveyed to SVWTP , where it is treated prior to entering the Alameda Siphons.

From the Irvington Tunnels, the blend of unfiltered Hetch Hetchy water and water treated at SVWTP is split into the five Bay Division Pipelines (BDPLs) at Irvington Portal in Fremont. BDPL Nos. 1, 2, and 5 continue west from the Irvington Tunnels, combining into the Bay Tunnel under San Francisco Bay from Newark to the Ravenswood area, then again splitting flows into BDPL Nos. 1, 2, and 5 to the Pulgas Tunnel west of Redwood City. The Bay Tunnel was commissioned in 2014, replacing two existing underwater pipelines. BDPL Nos. 3 and 4 travel south from Irvington Portal and follow the southern shore of San Francisco Bay through Santa Clar a, Sunnyvale, Mountain View, Palo Alto, and Stanford to the Pulgas Tunnel just west of Redwood City, where all five pipelines meet. Water in the Pulgas Tunnel continues to flow north to the Crystal Springs Bypass Tunnel to meet demands on the Peninsula; when demand is low, water is either pumped into the Pulgas Balancing Reservoir for storage or flows into Upper Crystal Springs Reservoir (UCSR) after being dechloraminated at the Pulgas Dechloramination Facility.

Section 1 – Introduction and Overview
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  5 The Palo Alto Pipeline is supplied by BDPL Nos. 1, 2, and 5, and supplies water south from Redwood City to Palo Alto, Stanford, and Menlo Park.

North of the Crystal Springs bypass facilities, Hetch Hetchy/SVWTP water is transmitted along the Peninsula into CCSF’s low-pressure zone system via the Sunset Supply Pipeline (SSPL) and Crystal Springs Pipeline ( CSPL) Nos. 1, 2, and 3. The terminal storage for low -pressure zone water consists of the University Mound Reservoir in San Francisco, which is supplied from CSPL Nos. 1 and 2. SSPL low-pressure zone water is transmitted north along the Peninsula to the Lake Merced Pump Station (LMPS) in San Francisco, where it is pumped into the high-pressure zone.

Water from LMPS either serves demands directly or is stored in Sunset Reservoir and S utro Reservoir in San Francisco.

San Mateo Creek watershed runoff is captured in Lower Crystal Springs Reservoir ( LCSR) and UCSR. Pilarcitos Creek watershed runoff is routed to LCSR for storage. Water from LCSR is transferred to San Andreas Reservoir throu gh the Crystal Springs Pump Station ( CSPS) and Crystal Springs-San Andreas Pipeline (CSSAPL). Harry Tracy Water Treatment Plant ( HTWTP) draws from San Andreas Reservoir for supply and produces high -pressure zone water. Treated water from HTWTP is transmitted through San Andreas Pipeline (SAPL) Nos. 2 and 3 and the Sunset Branch Pipeline. SAPL Nos. 2 and 3 reach high-pressure zone reservoirs in San Francisco.

The Sunset Branch Pipeline connects high -pressure zone to low -pressure zone water in SSPL through a pressure-reducing valve at the Capuchino Valve Lot in Millbrae. In Colma, at the San Pedro Valve Lot, SAPL No. 3 is interconnected with SSPL; north of this point, it is used for low - pressure zone water transmission to Merced Manor Reservoir. (This replaces the function previously provided by the abandoned Baden-Merced Pipeline.) Baden Pump Station allows low- pressure zone water from CSPL No. 2 to be pumped to each high-pressure zone pipeline. Baden Pump Station can also be used to transfer high -pressure zone water into the low -pressure zone pipelines. These inter-zone connections accomplished through the Water System Improvement Program (WSIP) at San Pedro Valve Lot , Baden Pump Station, and Capuchino greatly increase operational flexibility, particularly during construction work and emergencies.

The Pilarcitos watershed and reservoir is used to partially supply the Coastside County Water District, and also to supply RWS via inter-basin transfers.

A major upgrade of RWS facilities began in 2002,1 with the initiation of WSIP. Most of the projects are completed, and the program is 98 percent complete. As of June 2022, two regional projects remain to be completed. WSIP has significantly increased the reliability of the water system.

Thirteen groundwater wells in northern San Mateo County that were installed for WSIP will produce supplemental dry-year water supply to RWS as part of a SFPUC conjunctive-use project with the cities of Daly City and San Bruno, and the California Water Serv ice Company (Cal Water), which serves South San Francisco and Colma. Six groundwater wells in San Francisco will produce up to 4 mgd of groundwater for retail delivery in San Francisco , helping offset some of San Francisco’s demand from RWS.

1 SFPUC approved the Long-Term Strategic Plan and the Capital Improvement Program (CIP) in May 2002, followed by voter approval of revenue bond authority in November 2002. The first WSIP description (then referred to as the CIP) was submitted to the state in February 2003.

Section 1 – Introduction and Overview
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  6

1.3 Water Enterprise Management Structure
RWS is owned and operated by SFPUC , a department of CCSF, and serves both retail and wholesale customers in four counties in the Bay Area. SFPUC is responsible for the operations, maintenance, and development of three utili ty enterprises: Water, Wastewater, and Power. The Water Enterprise (WE) manages RWS through two large Operating Divisions that report to the Assistant General Manager, Water: Hetch Hetchy Water and Power (HHWP) and Water Supply and Treatment Division (WSTD).

HHWP manages the Hetch Hetchy Water portion of RWS from the source of the system in the Sierra Nevada to AEP. Additionally, HHWP operates and maintains SFPUC’s power generation and transmission system from its upcountry powerhouses in the Sierra Nevada across the valley to Newark.

WSTD manages the Regional Water portion of RWS from AEP at the end of CRT, through the wholesale service area, to terminal reservoirs in San Francisco. Additionally, WSTD operates and maintains multiple water treatment facilities to treat water from the Hetch Hetchy, Alameda Watershed, and Peninsula Watershed supplies.

In addition to the two abovementioned Operating Divisions, WE includes the Natural Resources and Lands Management Division ( NRLMD), the Water Quality Division ( WQD), the Water Resources Division (WRD), and the City Distribution Division (CDD).

NRLMD is responsible for operations and maintenance (O&M) of SFPUC-owned watershed and right-of-way (ROW) lands in the East Bay and Peninsula, and environmental regulatory compliance for WE O&M activities.

WQD provides laboratory services, compliance/ operational monitoring, process engineering, regulatory reporting, water quality inquiry/complaint response, and technical support for both HHWP and WSTD in the operation of RWS.

WRD is responsible for diversifying San Francisco’s water supply portfolio through a number of programs, including water conservation, groundwater, recycled water , and onsite water recycling. WRD also evaluates new projects that will help meet future water supply needs in the SFPUC service area, such as groundwater banking, surface water storage expansion, water transfers, purified water, and desalination, as well as technological innovations and other tools that can increase supply or reduce demand.

CDD is an Operating Division responsible for O&M of San Francisco’s four active water systems:
the Potable System, which includes reservoirs and pump stations; the Groundwater System; the Recycled Water System; and the Emergency Firefighting Water System.

1.4 Organization of Report
The State of the Regional Water System (SRWS) is best communicated by the state of the assets that it comprise. For this reason, the SRWS Report is strategicall y organized to communicate maintenance, capital, and regulatory work that is accomplished to maintain a sustainable RWS for customers that it serves. Report organization is summarized in Table 1-1.

Section 1 – Introduction and Overview
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  7 Table 1-1: Organization of SRWS Report
Section Core Focus
1 Defines purpose of the SRWS Report and provides an overview of the system and management structure
2 Provides an overview of asset management policies and capital planning business processes that are in place to manage the system
3 Reports on the progress that WE made during reporting cycle on its implementation of the Asset Management Policy
4 Is organized by asset type, providing a detailed report on asset maintenance and condition, as well as relevant capital improvement projects
5 Summarizes the regulators that have jurisdiction over the operation of portions of RWS, and any inspections or activities that occurred during this reporting cycle 6 Presents potential emerging issues tracked by SFPUC that may have significant impacts to operations and maintenance of RWS
Notes:

RWS = Regional Water System
SFPUC = San Francisco Public Utilities Commission
SRWS = State of the Regional Water System
WE = Water Enterprise
Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  8

2. Asset Management Policy and Capital
Planning Process
SFPUC has an Asset Management Policy and Capital Planning Process, which is implemented by WE. The policy and process work in tandem to produce a sustainable management structure that supports WE’s ability to achieve its LOS goals and objectives. Building on this foundation, WE developed and mapped specific asset management objectives to the Asset Management Policy; thus, establishing an architecture for management of WE assets.

2.1 Asset Management Policy
The SFPUC Asset Management Policy (SFPUC Policy) guides the planning, design, procurement, construction, operation, maintenance, and retire ment of critical infrastructure. Adopted by SFPUC in December 2020, it outlines SFPUC’s commitment and approach to managing its diverse portfolio of assets in a manner that maximizes life-cycle value of assets while consistently meeting level of service (LOS) and performance goals, as well as driving evidence-based decision making.

At the heart of the policy exists a set of “Guiding Asset Management Principles” that serve as the backbone of WE’s Asset Management strategy. WE’s implementation of the SFPUC Policy is discussed in Section 2.1.1, and its “Guiding Asset Principles” are summarized in Table 2-1.

2.1.1 Water Enterprise’s Implementation of the SFPUC Asset Management Policy
Since the SFPUC Policy was adopted, WE has worked on an implementation strategy that maps specific, measurable asset management objectives to the “Guiding Asset Management Principles” that were defined in the SFPUC Policy. As i llustrated on Figure 2-1, each SFPUC guiding principle may have multiple objectives defined by WE that, once achieved, will bring its Asset Management in alignment with the SFPUC Policy.

Figure 2-1: Mapping Each SFPUC Asset Management Guiding Principle to Multiple Asset Management Objectives for the Water Enterprise

The implementation strategy serves as a multi-year road map that will achieve consistency across WE. The rate of implementation will be specific to each Operating Division and will be heavily influenced by available resources and competin g operational priorities. Section 3 provides updates on each asset management objectiv e, highlighting WE’s accomplishments and achievements as it works toward full implementation of the SFPUC Policy.

WE Management Objective
SFPUC Policy Guiding Principle WE Management Objective
WE Management Objective
Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  9 Table 2-1: Summary of SFPUC Asset Management Guiding Principles and Water Enterprise’s Asset Management Objectives
Guiding Asset
Management
Principle SFPUC Principle Description
Water
Enterprise
Objectives
Asset Risk Management Develop and implement a risk management methodology that integrates understanding of risk across all asset classes and facilities.

See 2.1.1.1
Asset Management and
Maintenance Roles and
Responsibilities
Establish organizational roles, responsibilities, and
accountability, at the Enterprise and Bureau levels, across the various asset classes, for the management of the life cycle of the assets.

See 2.1.1.2
Asset Management
Objectives
Establish, publish, and regularly review asset management objectives to guide capital and maintenance planning. The objectives provide the necessary detail to connect daily workforce priorities with the broader policy goal and LOS.

See 2.1.1.3
Asset Registry Maintain a detailed asset inventory in CMMS and/or GIS. See 2.1.1.4 Asset Condition Perform periodic asset condition assessments and determine actual performance as related to LOS.

See 2.1.1.5
Operations and
Maintenance Strategies
Develop and implement reliability-centered, preventive, and corrective maintenance programs, across all asset classes, based on condition assessment findings and asset criticality.

See 2.1.1.6
Asset Investment
Strategies
Incorporate asset management findings into operating and capital budgets. Develop capital projects that directly address gaps in asset performance relative to established LOS and performance metrics.

See 2.1.1.7
Budgeting Develop budgets for all prioritized work; identify implementable funding plans in collaboration with SFPUC Finance.

See 2.1.1.8
Performance
Monitoring
Evaluate asset performance; investigate asset incidents and failures; and record available asset data for use in reviewing asset management objectives, updating the asset registry, assessing asset conditions, and informing operations and maintenance strategies and asset investment strategies.

See 2.1.1.9
LOS Establish, publish, and regularly review LOS goals and objectives, and related performance objectives.

See 2.1.1.10
Notes:

CMMS = Computerized Maintenance Management System
GIS = geographic information system
LOS = level of service
SFPUC = San Francisco Public Utilities Commission
Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  10

2.1.1.1 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Asset Risk Management
SFPUC Guiding Principle Description. Develop and implement a risk management methodology that integrates understanding of risk across all asset classes and facilities.

Objectives
• Deve
lop a Risk Framework that standardizes the use of consequence of failure (COF) and likelihood of failure (LOF) as the main drivers for determining system risk throughout WE. • Maintain emergency response plans (ERPs) for all WE Divisions. • Further develop and maintain a risk register in a computerized maintenance manage ment system (CMMS), including a score for COF, LOF, and Risk.

2.1.1.2 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Asset Management and Maintenance Roles and Responsibilities SFPUC Guiding Principle Description . Establish organizational roles, responsibilities, and accountability, at the Enterprise and Bureau levels, across the various asset classes, for the management of the life cycle of the assets.

Objectives
• Deve
lop an asset change management process.
• Develop WE and Division-level matrices to clearly outline roles and responsibilities for asset management and O&M staff.

2.1.1.3 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Asset Management Objectives
SFPUC Guiding Principle Description . Establish, publish, and regularly review asset management objectives to guide capital and maintenance planning. The objectives provide the necessary detail to connect daily workforce priorities with the broader policy goal and LOS.

Objectives
• Establ
ish Asset Management Objectives for WE that map back to SFPUC’s Asset Management Policy.
• Review the objectives to meet the system’s operational needs at least once every 2 years. • Report on the status of the Asset Management Objectives once every 2 years.

2.1.1.4 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Asset Registry
SFPUC Guiding Principle Description . Maintain a detailed asset inventory in CMMS and/or geographic information system (GIS).

Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  11 Objectives
• Continue to develop and maintain a detailed asset registry with increased standardization and uniformity across WE (asset classification, subclassification, specifications, and taxonomy).
• Develop a shared definition of an “asset” throughout WE. • Continue to use and standardize location and functional/location hierarchies within CMMS and GIS.
• Develop and maintain a GIS database for WE’s linear assets.

2.1.1.5 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Asset Condition
SFPUC Guiding Principle Description . Perform periodic asset condition assessments and determine actual performance as related to LOS.

Objectives:
• Com
plete planned and scheduled asset condition assessments that inform maintenance, investment, and risk mitigation strategies.
• Prioritize condition assessments to increase system reliability.

2.1.1.6 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Operations and Maintenance Strategies
SFPUC Guiding Principle Description. Develop and implement reliability-centered, preventive, and corrective maintenance programs, across all asset classes, based on condition assessment findings and asset criticality.

Objectives:
• Deve
lop a Strategic Asset Management Plan (SAMP) and individual Asset Management Plans (AMPs).
• Establish the ability to u se CMMS to demonstrate compliance with federal, state, and local regulatory requirements.
• Demonstrate proper stewardship of environmental resources under SFPUC control through the use of CMMS reporting.

2.1.1.7 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Asset Investment Strategies
SFPUC Guiding Principle Description . Incorporate asset management findings into operating and capital budgets. Develop capital projects that directly address gaps in asset performance relative to established LOS and performance metrics.

Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  12 Objectives:
• Use asset management data to develop expenditure reports that compile costs for facilities, assets, and maintenance programs.
• Develop and implement a replacement planning approach to estimate asset useful life, renewal, and replacement requirements and costs.
• Design future facilities based on information gathered through the asset management program.

2.1.1.8 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Budgeting
SFPUC Guiding Principle Description . Develop budgets for all prioritized work; identify implementable funding plans in collaboration with SFPUC Finance.

Objectives:
• Upd
ate the 10- Year Capital Improvement Program ( CIP) and annual operating budget by integrating data from condition assessments, estimates of remaining useful life, failure analyses, replacement costs, maintenance programs, and LOS into a well-informed forecast of Capital and Rehabilitation and Replacement (R&R) Program costs. • Develop expenditure reports that compile costs for facilities, assets, and maintenance programs—a quick way to tell where money is going and what it is accomplishing.

2.1.1.9 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Performance Monitoring
SFPUC Guiding Principle Description . Evaluate asset performance; investigate asset incidents and failures; and record available asset data for use in reviewing asset management objectives, updating the asset registry, assessing asset conditions, and informing O&M strategies and asset investment strategies.

Objectives:
• For
malize asset failures analysis and root cause analysis across WE. • Complete peer reviews of maintenance programs to ensure that the scope of maintenance is consistent with industry standards and create opportunities to increase standardization and uniformity across the WE, Enterprise Asset Management (WEEAM) Programs. • Establish and maintain Key Performance Indicators to track planning and scheduling, asset, and asset management efficiency and effectiveness.

2.1.1.10 Water Enterprise’s Implementation of the Asset Management Guiding Principle:

Levels of Service
SFPUC Guiding Principle Description . Establish, publish, and regularly review LOS goals and objectives, and related performance objectives.

Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  13 Objectives:
• Review LOS goals and objectives every odd year.

See Section 2.1.2 for WE’s LOS Objectives

2.1.2 Level of Service History and Objectives
In 2008, SFPUC Adopted LOSs for WE in conjunction with the approval of the WSIP Programmatic Environmental Impact Report. Those LOSs provided the basis for many WSIP project designs and are presented below.

As an update, the LOS language was reviewed and modified on June 2, 2021 (see Appendix E for the draft version). The modified version has not been considered for adoption.

The adopted LOS goals and objectives from 2008 are presented in the following sections.

2.1.2.1 Water Quality – Maintain High Water Quality
System Performance Objective:
• Design improvements to meet current and foreseeable future federal and state water quality requirements.
• Provide clean, unfiltered water originating from Hetch Hetchy Reservoir , and filtered water from local watersheds.
• Continue to implement watershed protection measures.

2.1.2.2 Seismic Reliability – Reduce Vulnerability to Earthquakes System Performance Objective:
• Design improvements to meet current seismic standards. • Deliver basic service to the three regions in the service area (East/South Bay, Peninsula, and San Francisco) within 24 hours after a major earthquake. Basic service is defined as average winter-month usage, and the performance objective for design of the regional system is 229 mgd. The performance objective is to provide delivery to at least 70 percent of the turnouts in each region, with 104, 44, and 81 mgd delivered to the East/South Bay, Peninsula, and San Francisco, respectively.
• Restore facilities to meet average-day demand of up to 300 mgd within 30 days after a major earthquake.

Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  14

2.1.2.3 Delivery Reliability – Increase Delivery Reliability and Improve Ability to Maintain the System
System Performance Objective:
• Provide operational flexibility to allow planned maintenance shutdown of individual facilities without interrupting customer service.
• Provide operational flexibility to minimize the risk of service interruption due to unplanned facility upsets or outages.
• Provide operational flexibility and system capacity to replenish local reservoirs as needed. • Meet the estimated average annual demand of up to 300 mgd under the conditions of one planned shutdown of a major facility for maintenance, concurrent with one unplanned facility outage due to a natural disaster, emergency, or facility failure/upset.

2.1.2.4 Water Supply – Meet Customer Water Needs in Non drought and Drought Periods
System Performance Objective:
• Meet an average annual non-drought-year system water demand of 265 mgd from the SFPUC watersheds for retail and wholesale customers through 2018. • Meet dry-year delivery needs through 2018 while limiting rationing to a maximum 20 percent system-wide reduction in water service during extended droughts. • Diversify water supply options during nondrought and drought periods. • Improve use of new water sources and drought management, including groundwater, recycled water, conservation, and transfers.

2.1.2.5 Sustainability – Enhance Sustainability in all System Activities System Performance Objective:
• Manage natural resources and physical systems to protect watershed ecosystems. • Meet, at a minimum, all current and anticipated legal requirements for protection of fish and wildlife habitat.
• Manage natural resources and physical systems to protect public health and safety.

2.1.2.6 Cost-Effectiveness – Achieve a Cost-Effective Fully Operational System System Performance Objective:
• Ensure cost-effective use of funds.
• Maintain a gravity-driven system.
• Implement regular inspection and maintenance program for all facilities.

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San Francisco Public Utilities Commission November 2022  15

2.2 Capital Planning Process
WE identifies and prioritizes the capital investments that are required to keep RWS in reliable operating condition. SFPUC Infrastructure implements the approved capital improvement programs (CIP) and projects for the t hree enterprises of SFPUC, including WE. An overview of how the WE manages the planning, prioritization, and optimization of its CIP is summarized in this section of the SRWS Report.

2.2.1 Capital Planning Process Overview
Capital projects that support RWS are organized into two 10-year CIPs—the Hetch Hetchy Water CIP and the Regional Water CIP —that are adopted by SFPUC and integrated into SFPUC’s Financial Plan and rate -setting calculations. Major updates to the CIP generally happen every 2 years, in coordination with the overall budget process ; however, annual updates may be required. The Hetch Hetchy Water CIP includes capital improvements to assets that are operated and maintained by HHWP. Similarly, the Regional Water CIP includes capital improvements to assets that are operated and maintained by WSTD, WQD, and NRLM.

The Capital Planning Proces s results in 1 0-year Capital Plans that are submitted to SFPUC and then San Francisco Board of Supervisors (SFBOS) for approval. The objectives for the capital plans are that they are (1 ) aligned with each Operating Division ’s priorities; (2) reviewed to confirm that adequate staffing and contracting resources are available to implement; and (3) considered “affordable,” based on meeting annual budget targe ts set by Finance . The Capital Planning Process generally includes (1 ) identification of candidate capital p rojects; (2) development of scopes, schedules, and budget estimates; and (3) confirmation of deliverability.

2.2.1.1 Identification of Candidate Capital Projects
Each of WE’s Operating Divisions is responsible for identifying candidate capital projects based on asset management data, regulatory requirements, emerging needs, and specific program goals or objectives (such as Alternative Water Supply projects). Data used to identify candidate projects vary but may include condition, age, operational performance, regulatory requirements, technology improvements , and estimated remaining life. Once identified, a list of candidate projects is produced for each Operating Division so that estimates m ay be dev eloped for the candidate projects’ scope, schedule, and budget.

2.2.1.2 Development of Scope, Schedule, and Budget Estimates For preparation of the 10- year CIPs, both active projects and new candidate projects undergo a project development and confirmation process that either updates or establishes scope, schedule, and budget for each project prior to advancing to the deliverability review.

New Candidate Projects
To confirm the project’s scope, schedule, and budget for a new candidate pro ject, a multi - discipline team is assembled from WE’s Operating Division s and Infrastructure. Led by the Operating Division, the team discusses the need for the project and develops a basic scope of work that can be used to establish an initial schedule and bud get. Infrastructure then leads the team to create a schedule and budget for the project.

Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  16 The budget developed for a new candidate project usually does not have much project maturity (typically less than 2 percent of project definition ) and is often the res ult of assessment or inspection work that was recently completed by the WE operations divisions. Because the project definition is low at this stage of the project, the cost estimates carry ranges and contingencies that are commensurate with the level of information on which they were based. C ost estimates are typically treated as Class 5 estimates, according to the Association for the Advancement of Cost Engineering International (AACEI) guidelines, and carry a range of -50 percent to +100 percent.

Additionally, built into the initial estimates are contingencies for design and reserves for unknowns. Lastly, the estimates include assumptions for escalation, which are calculated to the midpoint of construction once a schedule is determined.

Similar to the budget, the initial schedule for a new candidate project is developed collaboratively between the WE’s Operating Divisions and Infrastructure. Under Infrastructure’s leadership, the initial schedule for a new candidate project is developed by identifying the phases and deliverables that are expected for the project. Infrastructure applies its experience to identify the durations for each of the phases and milestones, and build up a draft of the initial schedule. The Operating Division may identify potential system outage constraints, including durations and boundaries, and the project’s construction schedule is adjusted as appropriate. It is noted that this exercise may impact the project’s cost estimate because the mid-point of construction may change, resulting in a change in the escalation part of the cost estimate.

Once candidate projects have scopes, schedules, and budgets established, they are entered into a capital planning database (SFPUC is currently using Unifier software) so they can be further evaluated based on the Operating Divisions’ priorities, the funding available, and Infrastructure’s resources.

Active Capital Projects
Unlike new candidate projects, active projects were approved in previous capital plans and have a moderate to strong project maturity level. The project teams have improved information, such as completed planning documents (e.g., Alternatives Analysis Report [AAR]) or partial design submittals (e.g., 35% Detailed Design) to advance the project’s schedule and budget. Also to the benefit of the active projects is a Project Controls team that works closely with Project Managers to track the health of the project in a quantitative manner that produces data for capital planning and reporting purposes.

Using data provided by the Project Controls team, the budget and schedule for each active project is reviewed by a multi-discipline team from WE’s Operating Divisions and Infrastructure, similar to the team that was assemble d to vet new candidate projects. The project budget and schedule are prepared us ing a detailed nine-project-phase structure. The structure includ es (1) project management; (2) planning; (3) environmental; (4) ROW; (5) design; (6) bid and a ward; (7) construction management; (8) construction; and (9) closeout, and each phase is evaluated for overruns and underruns using earned value management principles.

The active project budgets account for contingencies and reserves; however, the ranges and percentages of contingencies are reduced compared to those used for new candidate projects, in a manner commensurate with the project’s maturity level. Cost estimates follow the guidelines Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  17 of AACEI and typically include estimates from Class 4 through Class 1 as the project matures from the conceptual level to a complete design ready for advertisement.

Additionally, the outage assumptions for each active project are reviewed by WE ’s Operating Divisions, and adjustments are made to the project’ s scope, schedule, and budget if necessary.

Because large capital projects typically span multiple years, outage assumptions for each active capital project are reviewed with each CIP development cycle. This review is completed to determine whether the previously documented outage assumptions remain valid, recognizing that operational circumstances can change over long periods of time (years) for a host of reasons that range from emergency repairs to extreme drought or flood.

At the end of this exercise, the active project’s budget and schedule is adjusted accordingly and updated into Unifier so it can be further evaluated side by side with the new candidate projects for deliverability and priority.

2.2.1.3 Confirmation of Deliverability
For all active projects managed by Infrastructure , each bureau within Infrastructure ( Project Management Bureau ; Engineering Management Bureau ; Construction Management Bureau ; Environmental Management ; Project Control s; and Infrastructure B usiness Management , including Contracts Administration and Workforce Development) reviews each project to confirm that resources are and will continue to be available to support each project. First, the availability of project team leaders is confirmed by reviewing assignments for Project Manager, Project Engineer, Resident Engineer, Environmental Project Manager , and Project Control s Engineer. This is performed by Bureau Manager s, who confirm that leadership is in place and that team leaders have adequate availability for each project. The remaining resources needed for the project are then evaluated. This is generally performed by reviewing the project’s budget for soft costs and comparing it to the schedule for the planning, design, and construction phases. The number and classifications of staff are estimated from the budgets (such as the number of engineers for each discipline needed for design of each project) for each phase of the work. Then Bureau Managers total the staff estimates and compare them to current staffing levels to determine whether existing staffing is available to successfully implement the projects according to the planned budgets and schedules.

If internal (SFPUC) resources are not available to execute projects, o utside resources from other San Francisco Chapter 6 departments ( CCSF departments that perform construction projects) , such as the San Francisco Department of Public Works, are offered the opportunity to support the projects. If no Chapter 6 department has the necessary resources available , professional service contracts are considered and confirmed. For each active project, it is determined whether professional service contracts are needed for planning, design, or construction management support. Existing contracts are identified for availability, reserving a portion of each contract’s authority for relevant designated projects. Identification of new contracts and inclusion of the contract procurement timeline during project planning is important, especially for professional services contracts, because procurement may take up to one year. Future potential contracts are identified by Project and Bureau Managers and communicated to Contracts Administration staff, who support the procurement process; Contracts Administration workloads are evaluated on an 18- to 24-month look-ahead basis to accommodate future contracting needs.

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San Francisco Public Utilities Commission November 2022  18 Active projects maintain detailed Project M anagement Plans that are updated whenever the project moves to a new phase. Key project lead ers are listed, and resource requirements are detailed for the current phase. This is a useful tool for confirming deliverability as the project progresses.

During the capital planning process, new and candidate projects are not evaluated for deliverability until after the existing active projects are confirmed. Then candidate projects can be added into the deliverability review to see if there is sufficient resource capacity to initiate new projects. Infrastructure may comment back to WE that resources are or are not available to initiate the new project, in which case the project may be delayed or deferred until resources can be made available.

2.2.2 Capital Prioritization Process Overview
New candidate projects and active projects are up loaded into a master database with the scope, schedule, and budget that was developed during the previous steps of the planning process. The database also includes narratives for justification and statements of impact to operations. Projects are then assigned a criticality ranking based on criteria and methodologies specific to each of WE’s Operating Divisions. The criticality ranking is based on multiple factors, which include:
 active project versus new candidate project;
 remaining useful life and LOF of the asset(s);
 COF;
 contribution to LOS goals and objectives;
 project impacts to other projects within 10 years;
 regulatory requirements;
 environmental and community benefits;
 safety to the public and SFPUC personnel; and
 financial impacts.

Using a scoring system, WE staff meet to score projects, developing a criticality score for the project and the overall ranking for all projects. Th e criticality ranking is used to inform choices about which projects to assign financial, staffing, and contracting resources.

2.2.3 Optimizing and Balancing the 10-Year Capital Improvement Plan Once the projects are vetted, resources confirmed, and priorities set, the same multi-discipline team from both WE and Infrastr ucture begin the process of ba lancing the 10-year CIP to the financial targets established by Finance. Several iterations and refinements of the CIP master schedule are necessary between WE, Infrastructu re, and Finance staff to balance CIP priorities, financial projections, strategic planning, management considerations, and operational needs.

Iterations and refinements may include adjusting scopes and schedules to bring the 10-year CIP within financial targets.

In addition to adjusting the project’s scopes and schedules, the team also looks for creative solutions to optimize the capital plan. The goal of the optimization process is to reduce system risk while still meeting targets set by the Fi nance. Optimization concepts typically include (1) leveraging WE’s Operating Divisions’ R&R teams to complete small projects to accommodate Section 2 – Asset Management Policy and Capital Planning Process 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  19 deferment of large capital projects ; (2) partially encumbering large construction contracts over multiple years to reduce the amount of unspent funds in a single FY ; (3) identifying alternate resource plans to i mprove deliverability; and (4) realigning budgets from projects that are forecast to underspend or have closed.

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San Francisco Public Utilities Commission November 2022  20

3. Asset Management Program Status
WE remains focused on meeting the LOS goals and ob jectives while applying strategic asset management tactics that minimiz e operating costs and system risks to benefit the rate payers.

Section 2.1 presented the multi -year Asset Management strategy adopted by SFPUC in 2020, which will achieve consistency across the entire WE while also aligning its Asset Management practices with the SFPUC policy. Recognizing that this is a multi-year effort, WE made significant progress this reporting cycle to advance its Asset Management business practices.

3.1 Asset Risk Management
Objective #1 – Develop a Risk Framework that standardizes the use of COF and LOF as the main drivers for determining system risk throughout WE.

Status and Update: WE is in the process of transitioning to a risk -based capital planning strategy that will leverage its asset management data to forecast and prioritize future capital projects. The strategy involves summarizing WE into discrete groups of assets, establishing a probability of failure based on age and condition, and estimating a cost for replacement. When such a model is fully developed, WE will have the ability to communicate risks associated with the acceleration or deferment of capital investments, allowing for the opportunity to optimize its capital planning efforts.

Objective #2 – Maintain ERPs for all WE Divisions.

Status and Update: WE has ERPs in place for all of its regulated dams . The California Governor's Office of Emergency Services (Cal OES) has either approved or is reviewing all ERPs that are currently in place , and WE will continue to coordinate with Cal OES until all are approved. HHWP also maintains a staff that is trained in the Incident Command System ( ICS), with key staff having pre - deployed emergency response materials to improve efficiency immediately following an event. WSTD and NRLMD staff are also trained in ICS.

Objective #3 – Further develop and maintain a risk register in CMMS, including a score for COF, LOF, and Risk.

Status and Update: WE is working toward a risk framework that will eventually be used to assign scores to each of its assets in Maximo. HHWP, WSTD, and NRLMD are at various stages of development on this objective. HHWP has a risk framework in place and is beginning to implement the framework for capital planning purposes. WSTD intends to develop a similar framework, but risk scores for assets in Maximo will be tackled at a future date after more foundational asset management building blocks are completed or improved. NRLMD did not make progress on this objective during this reporting cycle.

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San Francisco Public Utilities Commission November 2022  21

3.2 Asset Management and Maintenance Roles and
Responsibilities
Objective #1 – Develop an asset change management process.

Status and Update: WE divisions maintain a complex, diverse, and ever-evolving portfolio of assets. Continual process improvement is critical to ensure that WE meets its asset management objectives now and into the future. In the spirit of continual process improvement and integration of asset management policies and programs, WE has assembled an inter -divisional Asset Management Steering Committee (AMSC). The purpose of the AMSC is to ensure the integration and alignment of asset management programs, policies, and procedures, to the extent feasible, within WE. To assist in fulfilling its purpose, the AMSC may develop a specific Task Force to address the objectives listed in Section 2.1.1. Each Task Force will comprise subject matter experts and stakeholders from each division. Such a Task Force has been developed to address the asset framework effort currently underway.

Objective #2 – Develop WE and Division -level matrices to clearly outline roles and responsibilities for asset management and O&M staff.

Status and Update: WE’s progress toward this objective is at various stages. HHWP initiated an end- to-end review of current business processes related to asset management, including the review of current procedures for alignment with current “best practices. ” Complementing this work , asset management roles and responsibilities are being codified through the development of role and responsibility matrices for each business process, ensuring adequate staffing and training levels within the utility. WSTD initiated a year-long review of its asset work flow, from asset creation through asset life -cycle management. This resulted in the October 2020 finalization of the Asset Management Procedures. The Asset Management Procedures define asset management roles and responsibilities within WSTD, and the procedures for managing and maintaining assets in WSTD’s Maximo database. NRLMD did not make progress on this objective during this reporting cycle . NRLMD w ill be reviewing HHWP’s updated business processes when they are complete and will likely develop similar business processes for their assets.

3.3 Asset Management Objectives
Objective #1 – Establish Asset Management Objectives for WE that map back to SFPUC’s Asset Management Policy.

Status and Update: Each division participated in the development of the Asset Management Objectives for WE . The Asset Management Objectives are now established.

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2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  22 Objective #2 –Review the objectives to meet the system’s operational needs at least once every 2 years.

Status and Update: Each division reviewed the Asset Management Objectives; no updates are recommended this reporting cycle because they were just established in 2022.

Objective #3 – Report on the status of the Asset Management Objectives once every 2 years.

Status and Update: Objective achieved. WE provided updates to all Asset Management Objectives.

3.4 Asset Registry
Objective #1 – Continue to develop and maintain a detailed asset registry with increased standardization and uniformity across WE (asset classification, subclassification, specifications, and taxonomy).

Status and Update: Divisions within the WE maintain asset registries of varying levels of development. HHWP and WST D asset registries are reasonabl y well defined, detailed, and are used at all levels to inform O&M decisions, as well as project work. Both divisions maintain asset registries comprising tens of thousands of asset records and related attributes, as well as asset classification, subclassifications, and failure modes. NRLM has identified the need for an asset registry centrally located in CMMS ; it is consistently and systematically moving to meet this requirement, with resource plans in place to achieve that end. Regardless of current maturity level, there is an effort throughout WE to move together toward a common framework for its asset management practices (facilitated by a contractor). The effort is focused on the foundational levels of EAM, following the Asset Management Pyramid depicted in Figure 3-1. Two building blocks of EAM were examined in detail by the consultant for implementation of the framework:
• asset classifications and attributes; and
• asset/functional location hierarchy.

In an effort to move toward greater uniformity and standardization of asset registries WE spent the last year agreeing on a common framework for asset registries, attributes, taxonomy, functional/location hierarchies, asset classifications, and failure classifications.

Significant progress was made in this effort. However, it is worth noting that much remains; reorganizing tens of thousands of existing assets owned by WE divisions and populating key asset attributes to the asset specification tab will be a multi-year effort. As WE divisions work on advancing the maturity of each of its asset management programs, the principles of the Asset Management Pyramid will be followed to the extent possible, and each division may mature at a different pace.

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San Francisco Public Utilities Commission November 2022  23

Figure 3-1: Asset Management Pyramid
Objective #2 – Develop a shared definition of an “asset” throughout WE.

Status and Update: CCSF’s Controller’s Office Policy and Procedures Manual has a detailed definition of “fixed” assets. Generally, items that are “used in operations,” “have a useful life over one year ,” and have an initial value greater than $5,000 are considered assets by city definition and are treated as such. WE ’s definition for what constitutes an asset for inclusion in Maximo is included in its October 2020 Asset Management Procedures ; a standardi zed definition beyond this, for use throughout WE, has yet to be developed.

Objective #3 – Continue to use and standardize location and functional/location hierarchies within CMMS and GIS.

Status and Update: WE is in the process of standardizing multiple datasets in CMMS and GIS, including location and function. This is being accomplished both through the inter -divisional asset f ramework and asset registry update efforts, which include representatives from all WE divisions.

WSTD’s transmission and distribution pipeline, line valve, and vault assets are in both Maximo and GIS. WSTD is currently collecting and updating pipeline appurtenance data as part of the Regional Cross- Connection Controls Project (RCCCP). Similarly, HHWP has more than 16,000 assets in Maximo and is preparing to complete an audit of these assets to confirm consistency th roughout the dataset.

The AMSC will also influence how GIS is used as an asset management tool and will set standards for uniformity across WE. HHWP, WSTD, and NRLMD have all

Section 3 – Asset Management Program Status
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  24 advanced their GIS databases over the reporting cycle , securing multiple professional services task orders that will continue to support WE into next reporting cycle.

Objective #4 – Develop and maintain a GIS database for WE’s linear assets.

Status and Update: WE made significant investments into advancing the GIS databases. The GIS database was advanced to include enterprise web maps and dashboards for viewing pipeline asset data; the ability to search using mile marker, SFPUC plac ename, pipeline station, and/or appurtenances; and the ability to spatially link from the web map to SharePoint to access pipeline drawings and documents for SJPLs, power transmission lines, and underground utilities. In the Bay Area, the GIS database provides support for critical programs such as pipeline inspection, Underground Service Alert, emergency response, and hydraulic modeling. It has become a component in succession planning because of its ability to share linear asset data intuitively with new employees. There are also numerous GIS-based displays that can be used to view work orders in the office or on mobile devices in the field.

3.5 Asset Condition
Objective #1 – Complete planned and scheduled asset condition a ssessments that inform maintenance, investment, and risk mitigation strategies.

Status and Update: WE completed multiple condition assessments during this reporting cycle. WE recognizes the value of this objective and intends to continue making progress during the next reporting cycle.

Objective #2 – Prioritize condition assessments to increase system reliability.

Status and Update: WE recognizes the value of this objective and intends to make progress during the next reporting cycle. WE currently does not have a written prioritization strategy for performing condition assessments. WE intends to review individual condition assessment program -level documents, such as WSTD’s approach for performing inspection and condition assessments of its linear assets, to assist in the development of a condition assessment prioritization strategy that is consistent across WE and applicable to both linear and fixed assets.

3.6 Operations and Maintenance Strategies
Objective #1 – Develop an SAMP and individual AMPs.

Status and Update: During this reporting cycle, WE made progress on this objective by completing multiple AMPs on the HHWP system , with additional AMPs in progress and on track for completion during the next reporting cycle. WE recognizes the importance of the SAMP, and has identified resources and drafted a draft scope of work for its completion in the next reporting cycle.

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San Francisco Public Utilities Commission November 2022  25 Objective #2 – Establish the ability to use CMMS to demonstrate compliance with federal, state, and local regulatory requirements.

Status and Update: WE is making progress on this objective, focusing on both HHWP and WSTD. HHWP and WSTD have a maturing capability to use Maximo data to provide evidence of compliance for multiple regulators , and have incorporated regulatory-driven preventive maintenance (PM) requirements in their Maximo databases. The PM completion records are regularly used by HHWP and WSTD facility managers to demonstrate compliance with federal, s tate, and local regulatory requirements during inspections and audits.

Objective #3 –Demonstrate proper stewardship of environmental resources under SFPUC control through the use of CMMS reporting.

Status and Update: WE’s environmental review requirements are fully integrated using Maximo for WSTD and HHWP. This is accomplished through the review of Maximo service requests, PM plans, work orders , and crew schedules. The key stake holders who provide input to this process include environmental planners, maintenance planners, supervisors, and managers, as well as frequent input from state and federal partners—all working together to ensure the best use and stewardship of WE’s environmental resources. Over the next reporting cycle , NRLMD is evaluating strategies to build into Maximo an environmental review of assets that are currently captured in their GIS database.

3.7 Asset Investment Strategies
Objective #1 – Use asset management data to develop expenditure reports that compile costs for facilities, assets, and maintenance programs.

Status and Update: WE did not make progress on this objective during this reporting cycle.

Objective #2 – Develop and implement a replacement planning approach to estimate asset useful life, renewal, and replacement requirements and costs.

Status and Update: WE made varying amounts of progress on this objective.

HHWP’s approximately 15,000 assets were summarized into approximately 1,200 assemblies. For each of these assemblies, HHWP calculated a percentage of useful life (age divided by expected life). Additionally, a high -level cost estimate for replacement was completed for each assembly. WSTD and NRLMD did not make progress on this objective during this reporting cycle. There are currently no cost data or estimates of asset useful life for WSTD ’s assets in Maximo . WSTD is working toward obtaining asset cost data and useful life estimates for new capital assets.

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San Francisco Public Utilities Commission November 2022  26 Objective #3 – Design future facilities based on information gathered through the asset management program.

Status and Update: WE did no t make progress on this objective during this reporting cycle.

3.8 Budgeting
Objective #1 – Update the 10-Year CIP and annual operating budget by integrating data from condition assessments, estimates of remaining useful life, failure analyses, replacement costs, maintenance programs, and LOS into a well-informed forecast of Capital and R&R Program costs.

Status and Update: WE did not make progress on this objective during this reporting cycle.

Objective #2 –Develop expenditure reports that compile costs for facilities, assets, and maintenance programs—a quick way to tell where money is going and what it is accomplishing.

Status and Update: WE did not make progress on this objective during this reporting cycle.

3.9 Performance Monitoring
Objective #1 –Formalize asset failures analysis and root cause analysis across WE.

Status and Update: WE made varying amounts of progress on this objective.

WSTD performs root cause analysis for failures that impact RWS performance or regulatory compliance. These inci dent reports are completed by operational staff.

HHWP and NRLMD did not make progress on this objective.

Objective #2 – Complete peer reviews of maintenance programs to ensure that the scope of maintenance is consistent with industry standards and create opportunities to increase standardization and uniformity across the WEEAM Programs
Status and Update: WE did not make progress on this objective during this reporting cycle.

Objective #3 – Establish and maintain Key Performance Indicators to track planning and scheduling, asset, and asset management efficiency and effectiveness.

Status and Update: WE did not make progress on this objective during this reporting cycle.

3.10 Levels of Service
Objective #1 –Review LOS goals and objectives every odd year.

Status and Update: WE reviewed the LOS during the reporting cycle.

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San Francisco Public Utilities Commission November 2022  27

4. Asset Description, Maintenance and
Condition, and Capital Improvements
This section is organized by the primary asset types that make up RWS:

Water Storage Water Treatment Water Transmission
Water Distribution Buildings and Grounds Power Generation Power Transmission Power Distribution Watersheds, Roads, and Bridges Wastewater Treatment Communications and Control
For each asset type, SFPUC is providing (1 ) a description of the assets; (2) a summary of the maintenance completed and condition ; and (3 ) information on the asset’s active or planned capital investments.

WE is actively working to review and update its P M records. The effort is anticipated to take 5 years, with 2022 being year 1. As this effort progresses, so will the information provided in the SRWS report.

For the capital improvement projects, details on the most current scope, schedule, and budget are provided quarterly and published through SFPUC meeting agendas and meeting minutes. For the purposes of the SRWS report, the capital improvement sections include (1) a summary of the scope of work; (2) an explanation of how the capital investment aligns with WE’s LOS; and (3) a summary of the project milestones that were achieved during the current reporting cycle.

4.1 Water Storage Assets
SFPUC owns and operates multiple dams to store water both upcountry and locally in the greater Bay Area region. For asset classification purpose s, outlet piping, valves, and spillways are considered part of the dams. The dams are regulated by the State of California’s Division of Safety of Dams (DSOD).

4.1.1 Hetch Hetchy Water
HHWP is responsible for the maintenance and operation of six dams. The dams include medium head dams that are used as regulating reservoirs, as well as larger high head dams that provide water storage for RWS.

4.1.1.1 Asset Descriptions, Maintenance, and Condition
O’Shaughnessy Dam
Description. RWS begins in the Hetch Hetchy Valley of Yosemite National Park at O’Shaughnessy Dam and Hetch Hetchy Reservoir. O’Shaughnessy Dam is a 312- foot-high above -streambed (430 feet above the lowest point in the foundation) gravity arch dam that impounds 360,360 acre- feet (AF) of water along the main stem of the Tuolumne River, creating Hetch Hetchy Reservoir.

The dam was originally built in 1923 and raised in 1938. Hetch Hetchy Reservoir collects water from the surrounding 45 9 square miles of the Hetch Hetchy water shed for the purpose of Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  28 providing potable water supply to the Bay Area and power generation at Kirkwood and Moccasin Powerhouses.

Maintenance. Table 4-1 summarizes maintenance work.

Table 4-1: O’Shaughnessy Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Valve Exercise Completed annually Annual exercise of Valves 1 through 8, 12, 13, 15, and 16 (Note: Valves 1 and 2 were not exercised in
2021 due to low lake levels)
Vegetation
Management
As needed Removal of vegetation on dam, along groins and near leakage weirs
Inspection Completed weekly Inspected by watershed keepers Completed annually Inspected by safety engineer
Surveillance and
Monitoring
Continuously monitored Reservoir water levels and releases via SCADA alarms
Completed weekly Weir leakage
Completed annually Joints, settling and deflection surveys Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. The dam’s concrete is in good condition; however, much of its mechanical equipment has exceeded its anticipated useful life and requires capital improvement. This includes the face valves, instream flow release (IFR) valves, slide gates, and bulkheads. Currently, one of the two IFR valves does not operate; however, normal dam operations can be performed with only one valve in operation. The bulkheads (aka shutter gates) are also nonoperational, which impacts HHWP’s ability to perform maintenance on the supply wells and slide gates. Additionally, much of the dam’s access structures and drainage systems are inadequate and require capital investment. O’Shaughnessy Dam is fit for service; however, its mechanical equipment requires capital investment to ensure reliable future operations.

Cherry Valley Dam
Description. Cherry Valley Dam is a 33 0-foot-high earth and rock fill dam. Lake Lloyd, the reservoir impounded by Cherry Valley Dam, stores approximately 273,500 AF. The dam was built in 1955. Water from the Cherry-Eleanor system is used for downstream flow obligations and power generation at Holm Powerhouse. With treatment and prior DDW approval, water from Lake Lloyd can be used to provide additional water supply in drought or emergency conditions.

Maintenance. Table 4-2 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  29 Table 4-2: Cherry Valley Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Valve Exercise Completed monthly Exercise Butterfly Valves 1 and 2 and Jet Flow Valves 1 and 2
Completed annually Exercise of Butterfly Valve 3
Vegetation
Management
As needed Removal of vegetation on dam, along groins and near leakage weirs
Inspection Completed weekly Inspected by watershed keepers Completed annually Inspected by safety engineer
Surveillance and
Monitoring
Continuously monitored Reservoir water levels and releases via SCADA alarms Completed weekly Weir leakage
Completed annually Settling and deflection surveys
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Cherry Valley Dam is in satisfactory condition; however, the intake tower to Cherry Power Tunnel requires rehabilitation. Additionally, the spillway is unable to pass the facility’s design flood. As a result of the spillway condition, HHWP has implemented a Forecast Informed Reservoir Operations (FIRO) strategy to avoid spill. Cherry Valley Dam is fit for service; however, the facility requires capital investment to address the items noted.

Lake Eleanor Dam
Description. Eleanor Dam is a 7 0-foot-high concrete buttressed arch dam. Lake Eleanor stores approximately 27,113 AF (capacity with flashboards). The dam was built in 1918. Water from the Cherry-Eleanor system is used for downstream flow obligations and power generation at Holm Powerhouse. With treatment and prior DDW approval, water from the Lake Eleanor can be used to provide additional water supply in drought or emergency conditions.

Maintenance. Table 4-3 summarizes maintenance work.

Table 4-3: Lake Eleanor Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Valve Exercise Completed annually Annual exercise of Slide Gates 1 through 4 and guard valves 3A and 4A
Vegetation Management As needed Removal of vegetation on dam and along groins Inspection Completed weekly Inspected by watershed keepers Completed annually Inspected by safety engineer
Surveillance and
Monitoring
Continuously monitored Reservoir water levels and releases via SCADA alarms Completed annually Settling and deflection surveys
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  30 Condition. Lake Eleanor Dam is in satisfactory condition and is fit for service; however, the facility requires capital investment to address the condition of the bridge, as well as concrete and erosion protection.

Early Intake Dam
Description. Early Intake Dam is an 81- foot-high concrete arch dam that impounds a storage volume of about 115 AF. The dam was built in 1924. Located on the mainstem of the Tuolumne River just downstream of Kirkwood Powerhouse, the dam provides the flexibility to divert water from the Tuolumne River or diversions from Lower Cherry Aqueduct ( LCA) into Mountain Tunnel. With treatment and prior DDW approval, water diverted at this dam into RWS can be used to provide additional water supply in drought or emergency conditions.

Maintenance. Table 4-4 summarizes maintenance work.

Table 4-4: Early Intake Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Valve Exercise Completed annually Annual exercise of Sluice Gates 1 and 2, and Guard Gates 1 and 2
Vegetation
Management
As needed Removal of vegetation on dam and along groins Inspection Completed weekly Inspected by watershed keepers Completed annually Inspected by safety engineer
Surveillance and
Monitoring
Continuously monitored Reservoir water levels and releases via SCADA alarms Completed biannually Cracks, settling, and deflection surveys Completed annually Lidar surveying of dam movement and crack mapping
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Early Intake Dam is in poor condition. The dam’s concrete has a well -documented history of alkali aggregate reaction, which has resulted in cracking and joint failures at the lift lines. Additionally, during the planning phase of the “Interim Improvements Project,” a potential stability issue was discovered , which has resulted in abandoning the interim repair project to accelerate the long-term improvements project. The dam is still capable of diverting water from LCA into Mountain Tunnel if an alternative water source for consumption by RWS customers is needed; however, it is nearing the end of its useful life, and capital investment is required.

Priest Dam
Description. Priest Dam is a 160-foot-high earth and rock dam that impounds a storage volume of 1,706 AF. The dam was built in 1923. Priest Reservoir stores Hetch Hetchy water before it reaches Moccasin Powerhouse via Moccasin Power Tunnel. Priest Reservoir has a pipeline bypass that Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  31 can be used when local reservoir turbidities are high, typically during and following s torm events.

Maintenance. Table 4-5 summarizes maintenance work.

Table 4-5: Priest Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022) Name of PM Completion Date(s) Description
Valve Exercise Completed annually Annual exercise of Bypass Butterfly Valve, Slide Gates 1 and 2, and Drain Valve
Vegetation
Management
As needed Removal of vegetation on dam, along groins and near leakage weirs
Inspection Completed weekly Inspected by watershed keepers Completed annually Inspected by safety engineer
Surveillance and
Monitoring
Continuously monitored Reservoir water levels, inflows, and releases via SCADA alarms.

Completed weekly Leakage weirs
Completed monthly Piezometers
Completed biannually Settling and deflection surveys
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Priest Dam is in satisfactory condition and is fit for service. The dam has a history of settlement and deflection, most of which occurred early in the dam’s life cycle. HHWP intends to evaluate whether additional instrumentation is warranted for the dam and will also perform an updated stability analysis and geotechnical exploration.

Moccasin Dam
Description. Moccasin Dam is a 70-foot-high earth and rock dam that impounds a storage volume of 552 AF. The dam was built in 1929. After leaving Moccasin Powerhouse, RWS water is stored at Moccasin Reservoir to provide a constant flow rate in the Foothill Tunnel. Moccasin Reservoir has a bypass pipeline that can be used when local reservoir turbidities are high or when performing maintenance at Moccasin Reservoir.

Maintenance. Table 4-6 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  32 Table 4-6: Moccasin Dam Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Valve Exercise Completed Annually Annual exercise of Gates 1, 1A, 2, 2A, and 3 Vegetation
Management
As needed Removal of vegetation on dam, along groins and in spillway
Inspection Completed weekly Inspected by watershed keepers Completed annually Inspected by safety engineer
Surveillance and
Monitoring
Continuously monitored Reservoir water levels, inflows, and releases via SCADA alarms.

Completed weekly Leakage weirs
Completed monthly Piezometers
Completed biannually Settling and deflection surveys
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Moccasin Dam is in satisfactory condition; however, the spillway is undersized and is not capable of passing the updated design flood that resulted from the March 2018 storm. The dam is fit for service; however, capital investment is required to increase the spillway capacity of the facility.

4.1.1.2 Capital Improvements
HHWP currently has nine active capital projects on its water storage assets, representing a total capital investment of $378.7 million. HHWP also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the active large capital projects are provided in the following sections.

O’Shaughnessy Dam Outlet Works Phase I (Approved Budget: $47.9 Million; Substantial Completion: 2025)
Scope. The project includes four subphases: (1) replacement of two IFR valves; (2) improvement to access and d rainage in the g allery and stairs ; (3) installation of new bulkheads; and (4) the planning phase for the slide gate and drum gate rehabilitation.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-7.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  33 Table 4-7: O’Shaughnessy Dam Outlet Works Phase I Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Bulkheads. Draft Conceptual Engineering Report (Revised) June 2021 Bulkheads. Conceptual Engineering Report (Final) August 2021 Bulkheads. Underwater Inspection and Trial Cleaning January 2022 Instream Flow Release. Needs Assessment/Alternatives Analysis Report June 2022 Drum Gates. Updated Stress Analysis Report December 2021 O’Shaughnessy Dam Outlet Works Phase II (Approved Budget $112.2 Million; Substantial Completion 2031)
Scope. The scope of Phase II includes (1) replacement of six 60-inch and one 72-inch needle valve; (2) refurbishment of one 7 2-inch butterf ly valve; (3) rehabilitation of three drum gates ; (4) refurbishment or replacement of 12 slide gates (beginning with design phase); (5) installation of a new 108-inch diversion pipe isolation valve; and (6) improvements to the division tunnel.

Milestones Completed During the Reporting Cycle. The project is scheduled and budgeted to begin in 2024; therefore, no milestones were achieved during this reporting cycle.

O’Shaughnessy Dam Access and Drainage (Approved Budget $4.0 Million; Substantial Completion 2022)
Scope. The scope of this project was reduced to only access improvements, including fall protection systems that meet Occupational Safety and Health Administration requirements for multiple ladders and landings.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-8.

Table 4-8: O’Shaughnessy Dam Access and Drainage Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
HH-1002 – Completed 100% design July 2020
HH-1002 – Rejected the single bid November 2020
HH-1002R – Repackaged and readvertised March 2021
HH-1002R – Issued construction notice to proceed September 2021 HH-1002R – Substantial completion June 2022
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  34 Cherry Dam Spillway – Short-Term Improvements (Approved Budget $11.9 Million; Substantial Completion: 2027)
Scope. The scope of this project is not confirmed and requires additional planning. The objective of the project is to design and construct improvements to the unlined channel that will minimize erosion damage to the chute and eliminate the potential hazard to th e dam when releases are made through the spillway.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-9.

Table 4-9: Cherry Dam Spillway – Short-Term Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Planning and Design – Issued a notice to proceed
for professional services under PRO.0138B
March 2021
Moccasin Dam and Reservoir Long-Term Improvements (Approved Budget $73.2 Million; Substantial Completion 2028)
Scope. The project will involve making the improvements required to safely pass the updated design flood; this will include a new concrete spillway.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-10.

Table 4-10: Moccasin Dam and Reservoir Long-Term Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Planning and Design Services – notice to proceed
for Professional Services under PRO.0138A
May 2021
AAR December 20221
Note:

AAR = Alternatives Analysis Report
Early Intake Dam Interim Improvements (Approved Budget $2.8 M; Substantial Completion:

Not Applicable)
Scope. The objective of the Interim Improvements Project was to extend the life of Early Intake Dam by 20 to 25 years so that the long-term improvements project could be deferred. The scope of the project was budgeted for relatively minor improvements, such as grouting or an upstream liner. Unfortunately, a new stability concern was discovered during the investigation phase of the project that could not easily be remedied by interim measures. In light of the new information, the Interim Improvements Project was closed , and the resources were reallocated to accelerate the “Long-Term” project.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  35 Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-11.

Table 4-11: Early Intake Dam Interim Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
AAR (interim repairs)* December 2020
Notes:
* The interim repairs project did not advance; resources were reallocated to the long-term improvements project.

AAR = Alternatives Analysis Report
Early Intake Dam – Long-Term (Approved Budget $94.7 Million; Substantial Completion: 2028) Scope. The scope of this project is not confirmed and requires additional planning. The objective of the Long- Term Project is to provide a long -term solution for the dam , which has been experiencing significant crackin g and deterioration from alkali -aggregate reactivity since construction in the 1920s.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-12.

Table 4-12: Early Intake Dam – Long-Term Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Planning and Design Services – Notice to proceed
for Professional Services under PRO.0138B
April 2021

Eleanor Dam Rehabilitation (Approved Budget $28.6 Million; Substantial Completion: 2030) Scope. The scope of this project is not confirmed and requires additional plannin g. Mitigation alternatives may include solutions such as improvements to increase the spill capacity , installation of a liner on the upstream face of the dam, pressure grouting, concrete repairs, valve replacement, and installation of concrete lining and riprap.

Milestones Completed During the Reporting Cycle. The project is scheduled and budgeted to begin in 2023; therefore, no milestones were achieved during this reporting cycle.

Moccasin Reservoir Perimeter Security Fence (Approved Budget $3.4 Million; Substantial Completion: 2021)
Scope. The scope of this project included installation of an approximately 5,000-f oot-long perimeter security fence system around Moccasin Reservoir to discourage trespassers.

Construction for this project was completed during the reporting cycle.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-13.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  36 Table 4-13: Moccasin Reservoir Perimeter Security Fence Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Completed Construction March 2021
Summary of Levels of Service Impacts
LOSs that are supported by the HHWP water storage capital improvements are provided in Table 4-14.

Table 4-14: HHWP Water Storage Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
O’Shaughnessy Dam
Outlet Works Phase I    
O’Shaughnessy Dam
Outlet Works Phase II  
O’Shaughnessy Dam
Access and Drainage 
Cherry Dam Spillway
– Short-Term
Improvements
   
Moccasin Dam and
Reservoir Long-Term
Improvements
   
Early Intake Dam
Interim Improvements 
Early Intake Dam –
Long Term 
Eleanor Dam
Rehabilitation    
Moccasin Reservoir
Perimeter Security
Fence
  
Notes:

HHWP = Hetch Hetchy Water and Power

4.1.2 Regional Water
WSTD is responsible for the maintenance and operation of five dams. The dams, situated in the East and West Bay, are part of a system of local reservoirs that provide water storage for RWS.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  37

4.1.2.1 Asset Descriptions, Maintenance, and Condition
Calaveras Dam
Description. Calaveras Dam is a 220- foot-high earth and rockfill dam. The original dam was completed in 1925, and a new replacement dam was completed in 2019. Calaveras Reservoir is SFPUC’s largest local reservoir. It has a capacity of 96,850 AF and is capable of holding 42 percent of the local storage capacity and 7 percent of the total system capacity. It is filled by direct inflow from Arroyo Hondo and Calaveras Creek, as well as from Alameda Creek via the Alameda Creek Diversion Dam facility. The spillway is an open channel with an ogee crest capable of passing the probable maximum flood (PMF). The outlet works is equipped with three levels of adit valves that provide operational flexibility. A lower fourth adit allows the reservoir to be emptied in an emergency.

Maintenance. Table 4-15 summarizes maintenance work.

Table 4-15: Calaveras Dam Summary (July 1, 2020, through June 30, 2022) Name of PM Completion Date(s) Description
Valve Exercise January 12, 2021
November 3, 2021*
April 21, 2022
12-month valve exercise for V21, V22, V23, V25,
V26, V27, V31, V33, and V34
Vegetation
Management
November 8, 2021
June through October 2021
April through June 2022
Goat grazing
Rodent Control
Monthly Inspection Completed monthly Frequency of inspection: weekly during rainy season and monthly during nonrainy season, in
accordance with the initial fill plan and SOP
Surveillance and
Monitoring
January 15, 2021 Engineering survey performed by AECOM
Notes:
* Completed in DSOD’s presence.

PM = preventive maintenance
SOP = standard operating procedure
Condition. Calaveras dam is in satisfactory condition. The dam crest was well aligned, and no signs of instability or distress were noted. The upstream riprap was uniform and intact. No cracking was noted on the crest pavement. At the spillway, the concrete surface appeared to be in satisfactory condition. Minor spalling and cracking on the concrete spillway were observed.

Some of the sealant area and joint area started to deteriorate. Repair of the concrete defects are in the planning phase. The outlet structure, including the adit valves and controls, was in good condition. No significant concrete cracking, spalling, or signs of structural distress were observed.

Minor seepage and mineral deposits were observed inside the intake structure. Vegetation and rodent control were deemed acceptable. Overall, the dam, reservoir and all appurtenances are safe for continued use.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  38 Turner Dam
Description. Turner Dam, which impounds water at the San Antonio Reservoir, is a 195-foot-high earth embankment dam. San Antonio Reservoir is one of two SFPUC rese rvoirs in the East Bay.

It is the third largest local reservoir, with a capacity of 50,500 AF. The dam, completed in 1965, was constructed on San Antonio Creek, a tributary of Alameda Creek. The reservoir is used to capture and store local runoff. It is also used to store water transferred from Hetch Hetchy Reservoir, Calaveras Reservoir, the South Bay Aqueduct blow-off, and Pond F3 East.

Maintenance. Table 4-16 summarizes maintenance work.

Table 4-16: Turner Dam Summary (July 1, 2020, through June 30, 2022) Name of PM Completion Date(s) Description
Valve Exercise January 6, 2021;*
March 14, 2022
12-month valve exercise for Y01, Y02, Y03, Y04,
Y05, Y20, Y21, and Y22 was performed in DSOD’s
presence
Vegetation
Management
October 19, 2021
June through October 2021
April through June 2022
Goat grazing
Rodent control
Monthly Inspection Completed monthly
Surveillance and
Monitoring
December 8, 2020
August 5, 2021
December 1, 2021
Semi-annual surveillance and monitoring
Note:
* Y22 was not cycled due to environmental restrictions.

DSOD = Division of Safety of Dams
PM = preventive maintenance
Condition. Turner Dam is in satisfactory condition. The dam crest was well aligned, and the embankment showed no signs of instability or distress. Vegetation control was acceptable, except in the discharge channel. The heavy vegeta tion inside the discharge channel could hinder full capacity use in the event of an emergency release. At the spillw ay, the concrete showed no significant structural deficiencies. Spillway wall cracks were repaired in 2021. The riprap of the downstream channel appeared to be stable and intact. Rodent control was satisfactory , with no significant burrowing activity obser ved. There was heavy erosion observed on the only access road to the inlet gallery. The erosion repair work is currently in the planning phase. With the exception of Y01, all the upstream valves are operable. Valve Y01 is clogged with silt. Valve Y02 had an electrical issue, which has since been repaired . Overall, the dam, reservoir , and all appurtenances are safe for continued use.

Pilarcitos Dam
Description. Pilarcitos Dam is a 95-foot-high earthen embankment dam. It was constructed in 1866, raised in 1874, and is the oldest DSOD jurisdictional dam in RWS. The reservoir storage capacity is 3,100 AF. Pilarcitos Reservoir supply can be transferred to LCSR for storage; transferred to the Coastside County Water District, which serves the Half Moon Bay are a; and/or be environmentally released.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  39 Maintenance. Table 4-17 summarizes maintenance work.

Table 4-17: Pilarcitos Dam Summary (July 1, 2020, through June 30, 2022) Name of PM Completion Date(s) Description
Valve Exercise January 25, 2022 Valves S10, S11, and S12 exercised in DSOD’s presence
Vegetation
Management
October 15, 2020
June 9, 2021*
September 27, 2021
November 2021 to June 2022
Prescribed burn and vegetation clearings were
conducted at Pilarcitos Dam
Rodent control
Monthly Inspection Completed monthly
Surveillance and
Monitoring
November 30, 2020
July 26, 2021
November 22, 2021
May 25, 2022
Semi-annual surveillance and monitoring
Notes:
* Control burn.

DSOD = Division of Safety of Dams
PM = preventive maintenance
Condition. Pilarcitos Dam is currently in satisfactory condition , with DSOD signaling a forthcoming change to a rating of “fair.” The dam and the embankment showed no immediate signs of instability or distress. The riprap on the stream face appeared to be stable and uniform.

Vegetation and rodent control were acceptable. Clusters of burrow holes were observed at the downstream face of the dam, and sensitive habitat flags were observed on the left groin. Due to environmental concerns, SFPUC cannot implement a more robust rodent and vegetation control plan. At the spillway, the concrete repair held up well. No new cracks or spalls were noted. One of the slide gates is not operational , due to corrosion at the U-shaped spillway weir. This work will be included in the next CIP project. The valves in the outlet structure are fully operational.

The dam, reservoir, and all the appurtenances are safe for continued use.

Stone Dam, downstream of Pilarcitos Reservoir, is a nonjurisdictional thin arch masonry dam constructed in 1871 by the Spring Valley Water Company. It currently serves as a diversion structure to supply water to Coastside County Water Distri ct. Regular maintenance of t he spillway is required for this purpose. The dam survived the 1906 and 1989 earthquakes , and impoundment is minimal enough that it does not qualify as a DSOD jurisdictional dam.

Stone Dam is in satisfactory condition, but structural deterioration of the spillway access structure prevents operational use of its stop logs; and the reservoir storage capacity is limited due to sediment deposition and lack of regular dredging.

Upper and Lower Crystal Springs Dams
Description. Upper Crystal Springs Dam (UCSD) is a 92.5-foot-high non-DSOD jurisdictional earth embankment dam. It was built in 1877, and was raised in 1891 and again in 1924. In 1924, modifications were made to the UCSD so that unregulated flow is provided between UCSR and LCSR, functionally making them act as one. UCSD is also the roadbed supporting Highway 92 as Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  40 it crosses the reservoirs. UCSR stores local runoff and water from Hetch Hetchy. Water from Hetch Hetc hy is dechloraminated or dechlorinated and adjusted for pH at the Pulgas Dechloramination Facility before entering UCSR.

LCSD is a 16 3-foot-high concrete gravity dam constructed in 1890. The dam was built with interlocking concrete blocks and survived both the 1906 and 1989 earthquakes without significant damage. The combined storage capacity of UCSR and LCSR is 69,300 AF . In 2015, SFPUC completed a WSIP project that enlarged the spillway and stilling basin, raised the parapet wall, and improved the emergency outlet works. These improvements enable the PMF and other very large and infrequent floods to safely pass LCSR spillway, outlet works, and dam crest, as well as restoring LCSR to its historical storage capacity.

Maintenance. Table 4-18 summarizes maintenance work.

Table 4-18: Lower Crystal Springs Dam Summary (July 1, 2020, through June 30, 2022) Name of PM Completion Date(s) Description
Valve Exercise December 9 2020
December 14, 2021*
12-month valve exercise for H81, H82, H84, H87,
H91, H92, H10, H11, H12, H20, H21, and H22
Vegetation
Management
None performed Vegetation removal will be done in the summer of 2022 by a JOC contractor under the Access Stairs
Installation Project
Monthly Inspection Completed monthly
Surveillance and
Monitoring
November 5, 2020
July 29, 2021
November 7, 2021
June 23, 2022
Semi-annual surveillance and monitoring
Note:
* Completed in DSOD’s presence.

JOC = job order contract
PM = preventive maintenance
Condition. Lower Crystal Dam is in satisfactory condition. The interlocking concrete blocks showed no new signs of structural distress. The spillway approach, control section, stilling basin, and downstream channel were clear and unobstructed. The concrete surface of the spillway and walls have minor cracking, consistent with curing. The outlet was fully operational. H owever, the vegetation control at the groin area needs improvement.

San Andreas Dam
Description. San Andreas Dam is a 105- foot-high earth embankment dam, built in 1870 , with a storage capacity of 19,000 AF. The San Andreas Fault runs along the eastern abutment of the dam.

This reservoir is adjacent to the HTWTP and is the raw water source for the plant. The reservoir stores local runoff and water pumped from LCSR through CSSAPL from the CSPS. Two outlet structures, San Andreas Outlet Structure 2 and San And reas Outlet Structure 3, were upgraded by WSIP in 2015.

Maintenance. Table 4-19 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  41 Table 4-19: San Andreas Dam Summary (July 1, 2020, through June 30, 2022) Name of PM Completion Date(s) Description
Valve Exercise September 29, 2021 12-month valve exercise for N21, N31, and N33 in DSOD’s presence
Vegetation Management February 6, 2021
June 9, 2021*
June 7, 2022
November 2021 through
June 2022
Prescribed burn was conducted on San Andreas
Dam.

Rodent Control
Monthly Inspection Completed monthly
Surveillance and
Monitoring
November 24, 2020,
July 18, 2021,
November 18, 2021,
June 7, 2022
Semi-annual surveillance and monitoring
Notes:
* Control burn.

DSOD = Division of Safety of Dams
PM = preventive maintenance
Condition. San Andreas Dam is in only fair condition due to the condition of its spillway. The paved crest, upstream and downstream slope, and abutment contacts showed no signs of instability or distress. The upstream riprap was even and uniform. Vegetation and rodent control were generally good. Sensitive habitat flags and rodent borrows were observed on the downstream face of the dam. Due to environmental concerns, SFPUC cannot implement a more robust vegetation control or rodent control plans. At the spillway, the concrete surface was in fair condition. Typical concrete cracks on the spillway wall and flood are hairline cracks and concrete spalls. Periodic repair of the concrete is required bec ause the spillway is in the vicinity of San Andreas Fault and is subject to ground creep. The spillway approach, control structure , and downstream chute were clear and unobstructed. The steel beams under the spillway bridge are corroded. A plan to bring in a contractor to blast and repaint the beams is in progress. The spalling at the underside of the deck was repaired. No new cracks or spalls were noted. The valves in the two outlet structures were operational. This dam, reservoir, and all their appurtenances are safe for continued use.

4.1.2.2 Capital Improvements
Regional Water currently has 15 active capital projects in its water storage program, representing a total capital investment of $290 mil lion. Summaries for the large capital projects are provided in the following sections.

Calaveras Reservoir Expansion Project (Approved Budget: $7.5 Million; Substantial Completion: 2033)
Scope. This storage project involves the potential expansion of Calaveras Reservoir to store excess regional water supplies or other source water in wet/ normal years. Current storage capacity is 96,850 AF (or 31 billion gallons) of water. The expansion could increase storage by as much as 289,000 AF (or 94 billion gallons), for a new storage capacity of up to 385,850 AF (or 125 billion Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  42 gallons) of water. Depending on the findings from the alternatives analysis, the proposed project would include (1) raising the dam ; (2) increasing the capacity of the outlet structures and the spillway; and (3) adding any transmission and pumping needed to bring water to Cal averas Reservoir.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-20.

Table 4-20: Calaveras Reservoir Expansion Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Final Dam Raise Feasibility Study December 28, 2020
Conveyance System Feasibility Study April 4, 2022
Turner Dam and Reservoir Improvements Project (Approved Budget: $7.5 Million; Substantial Completion: 2033)
Scope. The project will involve investigation of the seismic stability and hydraulic performance of the Turner Dam and San Antonio Reservoir facilities; the necessary upgrades (to be determined during the Planning Phase) will be performed, including those to the embankment dam, outlet tunnel and pipeline, concrete spillway, and other ancillary facilities.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-21.

Table 4-21: Turner Dam and Reservoir Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Spillway Condition Assessment – Phase 2 November 30, 2021 Probable Maximum Flood Study April 2022
Pilarcitos Dam Improvements Project (Approved Budget: $30.09 Million; Substantial Completion: 2027)
Scope. The project will involve investigating the seismic stability and hydraulic performance of the Pilarcitos Dam and Reservoir facilities; the necessary upgrades (to be determined during the Planning Phase) will be performed, including those to the dam and forebay outlet structure, outlet tunnel, outlet pipeline, and spillway.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-22.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  43 Table 4-22: Pilarcitos Dam Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Geotechnical Data Report September 30, 2020
Dam Embankment Stability Analysis June 30, 2021
Overall Project Condition and Needs Assessment September 30, 2021 San Andreas Dam Facility Improvements Project (Approved Budget: $32.2 Million; Substantial Completion: 2032)
Scope. The project will involve investigating the seismic stability and hydraulic performance of the San Andreas Dam and Reservoir facilities; the necessary upgrades (to be determined during the Planning Phase) will be performed, including those to the embankment dam, emergency outlet and pipeline, spillways, and other ancillary facilities.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-23.

Table 4-23: San Andreas Dam Facility Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Overall Condition and Needs Assessment December, 2021
Preliminary Embankment Stability Technical Memorandum May 3, 2021

Summary of Levels of Service Impacts
LOSs that are supported by the RWS water storage capital improvements are provided in Table 4-24.

Table 4-24: RWS Water Storage Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
Calaveras Reservoir
Expansion Project 
Turner Dam and Reservoir
Improvements Project  
Pilarcitos Dam
Improvements Project   
San Andreas Dam Facility
Improvements Project 
Note:

RWS = Regional Water System
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  44

4.2 Water Treatment Assets

4.2.1 Hetch Hetchy Water
HHWP owns and operates one RWS treatment facility:

Rock River Treatment Facility

4.2.1.1 Asset Descriptions, Maintenance, and Condition
Rock River Treatment Facility
Description. Rock River Treatment Facility (aka Rock River Lime Plant) is situated along Foothill Tunnel near Jamestown, California. The plant doses Hetch Hetchy water deliveries to RWS with hydrated lime (calcium hydroxide) to raise the pH and alkalinity of the water for SJPL corrosion control. T he plant includes two quicklime (calcium oxide) storage silos ; lime dust handling equipment; two lime slakers, consisting of chemical feeders, rotary mixers, associated piping, and their controls; a backup electric generator and propane tank; and a bin for grit waste storage for offsite disposal.

Maintenance. Table 4-25 summarizes maintenance work.

Table 4-25: Rock River Treatment Facility Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Water Sampling Completed weekly Sampled for chemistry and bacterial agents Instrument
Verification and
Calibration
Completed weekly Instruments verified weekly
Completed monthly Instruments recalibrated monthly
Inspection Completed weekly Facility inspected by HHWP Stationary Engineer Surveillance and
Monitoring
Continuously monitored Plant monitored continuously via internal dataloggers
Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
Condition. Rock River Treatment Facility is in good condition and remains fit for service.

4.2.1.2 Capital Improvements
There are no large capital improvements for HHWP’s Water Treatment assets included in the current 10-year capital plan.

4.2.2 Regional Water
Regional Water has six major treatment facilities: TTF, Thomas Shaft Chlorination Facility, SVCF, SVWTP, Pulgas Dechloramination Facility, and HTWTP. TTF primarily treats Tuolumne-based Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  45 supplies, and the two filtration plants treat local watershed water. Treatment improvements are ongoing, such as the addition of ozone and flocculation aid polymer, to ensure reliable operation and meet the aesthetic expectations of customers. These facilities, along with small treatment facilities that are part of the supporting utilities at remote SFPUC locations, are listed in Appendix A.

Asset descriptions for the major RWS facilities are provided in the following sections, organized from upstream to downstream. Regional Groundwater Storage and Recovery Project ( RGSR) wells are also included due to recent work done to construct the wells and upcoming work to improve the wells’ operation.

4.2.2.1 Asset Descriptions, Maintenance, and Condition
Tesla Treatment Facility
Description. TTF is at the entrance to the CRT, near Tracy, California. Treatment of Hetch Hetchy supply at this facility consists of UV light and chlorine disinfection, pH reduction using carbon dioxide, and fluoride addition. The UV system was brought online during the summer of 2011 to meet regulatory requirements from the Long-Term 2 Enhanced Surface Water Treatment Rule. In the event of a chlorination failure at the TTF , the Thomas Shaft Chlorination Facility, about

4.4 miles west of Tesla on the CRT, will automatically start and boost chlorine to maintain disinfection. The detention time necessary for complete chlorine disinfection is obtained within the 25-mile length of the CRT.

Maintenance. Routine inspection and maintenance for the TTF is performed throughout the year.

A comprehensive PM program is also completed for the facility when it is offline during any scheduled Hetch Hetchy outages. Additional maintenance service contracts for critical assets and components have been set up to provide quarterly inspection and diagnostics of the TTF electrical room heating, ventilation, and air conditioning (HVAC) air handling units; and quarterly and annual maintenance of the three flywheel UPS units. In early 2022, minor repairs were completed on two sodium hypochlorite storage tanks when small leaks were detected from the mating surfaces of the drain flanges.

Work continues with the modification of one of the existing carbon dioxide feed systems to enable the operator to feed chemical at a lower dose. Work is on hold due to manufacturer supply chain issues and will commence once the new flowmeter is received. Upon installation of th e flowmeter, a functional test will be performed to confirm proper operation and control of the carbon dioxide system. Currently, the carbon dioxide feed system remains functional in manual mode.

The report for the previous reporting cycle discussed efforts to resolve the TTF UV lamp failures and lamp breaks. SFPUC staff worked closely with the original UV manufacturer, Calgon Carbon (now De Nora Water Technologies), to determine the root cause of the lamp breaks. The only lamp break during the current repo rting cycle occurred on August 24, 2020, during routine UV sensor calibration. As of October 2020, all reactors have new lamps with a slightly reduced inert gas pressure and are operating using the original factory bank switching setpoints (i.e., higher power). The new lamps were provided to mitigate the phenomenon of acoustic resonance, which Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  46 Calgon considered to be the root cause of the breaks. The TTF has been operating successfully without any lamp breaks since August 2020.

Condition. TTF is in good condition. In 2023, PM and testing will be performed on the TTF electrical switchgear equipment. WSTD will also continue to explore options for more efficient treatment of the TTF domestic water system and installation of a booster pump to the existing water quality analyzers downstream of the TTF.

Thomas Shaft Chlorination Facility
Description. Thomas Shaft Chlorination Facility is 4.4 mile s downstream of TTF on the CRT.

Thomas Shaft serves two critical functions. First, it serves as a backup c hlorination facility to provide disinfection of the water supply in the event of a failure of the chlorine feed system at TTF. Second, it serves as a potable water supply source for the Lawrence Livermore National Laboratory ( LLNL) campus at Site 300. A sm all UV s ystem at Thomas Shaft supplements disinfection for LLNL deliveries at high CRT flow rates. The initial standby disinfection facilities were installed in 1995 and subsequently upgraded in 2002. The disinfection facilities for the Lawrence Livermore supply were added in 2010/2011 as part of WSIP.

Maintenance. Recent improvements at the Thomas Shaft facility included the installation of a backflow preventer at LLNL ’s point of connection at Thomas Shaft; and replacement of the chemical feed piping between the storage tanks and metering pumps by in -house plumbers. In 2022, PM and testing were also performed on the electrical switchgear equipment.

Condition. Thomas Shaft Facility is in fair condition, due to a failed HVAC unit in the electrical room and failure of one of two sample pumps at the bottom of Thomas Shaf t. An upcoming job order contract (JOC) will address these deficiencies. The JOC is expected to begin construction in the fall of 2022 and be completed by spring of 2023.

Sunol Valley Chloramination Facility
Description. SVCF is immediately adjacent to the Alameda Siphons. As part of WSIP, portions of the facility were modified from previous uses and other portions were newly constructed. The SVCF currently serves two primary functions: ammonia addition and sodium hypochlorite trim for chloramination, and caustic addition for corrosion control.

Additionally, the facility has the ability to feed sodium bisulfite for dechlorination and pH adjustment purposes. This operation is used during periods when (1) the Hetch Hetchy or SVWTP water do not meet drinking water standards and consequently must be discharged to either an adjacent quarry pit, San Antonio Creek, or San Antonio Reservoir; or (2) Hetch Hetchy water is used to refill San Antonio Reservoir and water must be treated to me et National Pollutant Discharge Elimination System (NPDES) requirements for total chlorine and pH prior to discharge.

SVCF also has a fluoride feed facility that was constructed to serve as a backup fluoride injection point for TTF and SVWTP. In addition, the adjacent Sunol Dechlorination Facility was later constructed to use calcium thiosulfate and fluoride for dechlorination and pH adjustment , respectively, of Hetch Hetchy water being transferred to the San Antonio Reservoir for storage.

Maintenance. Recent work includes the replacement of the uninterruptible power supply (UPS) system. This particular unit was at the end of its useful life. In early 2021, the 30-kilovolt-ampere Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  47 (kVa) UPS unit, external bypass switch, and input transformer were replaced to provide the facility with a reliable uninterrupted power supply between utility and backup generator power.

In mid-2021, one of three fiberglass- reinforced plastic (FRP) sodium hypochlorite storage tanks at SVCF developed a small leak. The storage tank was drained, inspected, and subsequently repaired by an FRP tank repair vendor; it was returned to service by the end of 2021. In 2022, PM and testing were performed on the SVCF electrical switchgear equipment. In addition, ongoing efforts are being taken to replace older Coriolis -type flowmeters that are used to measure chemical dosing from the SVCF chemical metering pumps into the Alameda Siphons . The flowmeter replacements are being completed by WSTD ’s electronic maintenance technicians during scheduled shutdowns.

Condition. SVCF is in fair condition. The upcoming SVCF Improvements Project scope includes the replacement of the two 8,000- gallon aqua ammonia storage tanks and seismic upgrades of their concrete tank support pedestals; rehabilitation of the fluoride system ; replacement of the carrier water pumps ; system integration of the SVCF with the Sunol Dechlorination Facility ; replacement of the SVCF chemical metering pumps and pump controllers ; and upgrades to SVCF’s main programmable logic controller (PLC) hardware. The project is expected to go out to bid in late 2022, with construction completion in 2024.

Sunol Valley Water Treatment Plant
Description. SVWTP was originally constructed in 1966 and expanded in 1974; significant improvements were completed in 2003 ( Phase I) and in 2013 ( WSIP). The SVWTP is a 160 mgd conventional filtration plant. Water from the Calaveras and San Antonio Reservoirs flows by gravity to the facility, where it goes through the treatment process. When higher flow rates are needed or not hydraulically feasible due to lower reservoir levels, the pumps at the San Antonio Pump Station (SAPS) are used to convey water from San Antonio Reservoir to SVWTP. Although an operational rarity, Hetch Hetchy water can be treated at the plant via SAPS to mitigate water quality issues. Water leaving the plant is chloraminated, fluoridated, and pH -adjusted before entering the Alameda Siphons via the facility’s treated water reservoir. The plant is unique in that raw water passes through a distribution structure that channels the water to individual treatment trains. This allows the different raw water sources (Calaveras, San Antonio, and Hetch Hetchy) to be treated by different treatment trains. The WSIP project upgraded the existing filters and added a fif th flocculation and sedimentation basin, chlorine contactor, treated water reservoir, and chloramination and fluoridation systems. These upgrades greatly improved the plant’s reliable capacity and redundancy. Improvements made since completion of the WSIP project include replacement of existing chemical piping, replacement of valves in the sludge lagoons, drainage improvements near an existing electrical building, installation of safety handrails around four ex isting sedimentation basins, relocation of the s upervisory control and data acquisition (SCADA) server room, and installation of a powdered activated carbon (PAC) system to mitigate potential taste and odor (T&O) events.

Maintenance. Work currently underway at SVWTP includes the SVWTP and SVCF Aqua Ammonia Structural Repairs and Tank Replacement Project. Part of the scope of work is to make seismic modification and repairs to the SVWTP chemical unloading area canopy structure , and to the aq ua ammonia and sodium hypochlorite canopy structure. Planning and design also continued on a new polymer feed facility to improve flocculation and sedimentation basin Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  48 performance. Other notable work performed included repairs to the plant UPS units, and concrete repairs to sedimentation basin No. 4.

Future projects nearing construction include the replacement of the generator diesel particulate filter and load bank, and replacement of the plant’s main UPS unit. Projects in the planning phase include the SVWTP Short-Term Improvements Project. The scope of work under this project will include replacement of the filter valves, sludge system piping, sodium hydroxide feed piping, filter air scour piping, cationic polymer piping , and feed pumps ; repairs to address concrete spalling in the sedimentation basins; and repair or replacement of the sedimentation scraper equipment. These areas were identified by WSTD staff for replacement and upgrades to ensure continued reliability of the SVWTP. Other projects in planning include an evaluation to replace the existing sedimentation basin baffle walls with FRP walls. In addition, there is a large capital improvement project, currently at 35% design, to construct a new ozonation facility at SVWTP to remove T&O compounds associated with algal blooms in San Antonio and Calaveras Reservoirs; and to provide other water quality benefits, such as disinfection byproduct (DBP) reduction. This new facility will address long-term T&O control associated with algal blooms in San Antonio and Calaveras Reservoirs.

Condition. SVWTP is in good condition.

Pulgas Dechloramination Facility
Description. The purpose of the Pulgas Dechloramination Facility is to dechlorinate or dechloraminate the water discharged from the Pulgas Tunnel to the UCSR, while meeting NPDES permit requirements. The facility is immediately downstream of the Pulgas Pump Station and Balancing Reservoir . It has a treatment capacity of approximately 200 mgd and u ses sodium hypochlorite, sodium bisulfite, and CO 2 to dechloraminate and adjust the pH of the receiving water prior to discharge.

Past upgrades to the facility included the replacement of the UPS unit and external bypass switches to improve UPS reliability during utility power interruptions. Projects in the design phase include replacement of the facility’s rain gutters, which have corroded and deteriorated over the years.

Maintenance. Recent upgrades to the Pulgas Dechloramination Facility include the replacement of the UPS unit and external bypass switches to improve UPS reliability during utility power interruptions. Projects in the design phase include replacement of the facility’s rain gutters, which have corroded and deteriorated over the years.

Condition. Pulgas Dechloramination Facility is in good condition.

Harry Tracy Water Treatment Plant
Description. HTWTP was originally constructed in San Bruno in 1972, and significant WSIP improvements were completed in 2014. HTWTP primarily supplies the high -pressure zone customers on the Upper Peninsula and San Francisco . When necessary, it can also supplement low-pressure zone customers through the pressure -reducing valve at Capuchino Valve Lot .

Source water for HTWTP is pumped from Crystal Springs Reservoir to San Andreas Reservoir, where it is again pumped to the HTWTP. HTWTP is a 140 mgd direct filtration plant that provides Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  49 pre-oxidation with ozone, coagulation, flocculation, filtration through dual-media filters, fluoridation, corrosion control, and disinfection with sodium hypochlorite and ammonia to form chloramines. Significant improvements were made at HTWTP during WSIP to mitigate concerns about meeting LOS goals and objectives. In particular, the chlorine contactor and the 11-million- gallon treated water reservoir were situated on more stable ground. The treated water reservoir has a foundation supported by more than 800 piles driven down 12 to 61 feet to bedrock. Additional improvements included upgrades to the sludge-handling process, a new washwater tank, a new substation, switchgear, and motor control center (MCC). The conveyance structures that bring water from San Andreas Reservoir to HTWTP were rebuilt to comply with the latest seismic code.

Filter Underdrain
HTWTP has six existing filter underdrains that were originally constructed in 1972 and renovated in 1992. In 2009, as part of the HTWTP Short-Term Improvements Project, these filter underdrains were retrofitted, receiving plastic block underdra ins with porous plate media retaining caps . In 2019 and 2020, two of the filters experienced a fa ilure, during which seve ral underdrain blocks were dislodged from the filter floor, allowing filter media and unfiltered water to enter the filter gullet. All six filters were taken out of servic e as a precaution. Currently, HTWTP relies on the remaining nine filters, which have a nozzle with plenum underdrain configuration, to meet the water production demand. From 2020 through 2022, failure analysis, alternative analysis, conceptual engineering, and design were completed for this project. The proposed modifications include installing new stainless steel underdrain systems, anchoring the six existing filters to the filter floor, replacing existing air distribution pipes and pipe supports within the filter flumes of each of the filters, and connecting to the existi ng air distribution system. Other miscellaneous modifications include coating and lining repair work, and concrete repair work. The construction phase is expected to start in late 2022 and extend for 1 year.

Maintenance. Numerous improvements to the plant’s backup power supply system have been completed. The diesel particulate filters on th e plant’s three existing standby generators have been replaced with active type filters that rely on less load and heat to regenerate the filters, thereby improving filter performance and mainta ining efficient removal of particulate matter from the generators. The hardware and software for the generator controls system were also recently upgraded for improved monitoring and control via SCADA. At HTWTP’s existing washwater clarifiers, new mixers, spray nozzle systems, and level sensors have been installed for improved performance and monitoring, and redu ced sludge buildup. There have also been smaller R&R projects in the last 2 years, addr essing the overall reliability of HTWTP. These projects included rebuilding one of the raw wate r pump station motors; and corrosion repair of the access hatches above the treated water reservoir.

Projects in the construction phase include providing auto-flushing for the sludge transfer pumps with PLC consolidation, repairing and rebuilding one of the standby generators, and performing electrical switchgear PM work.

Upcoming projects currently in design include HVAC replacement for the Ozone Building server room; an upgraded fire-suppression system at the raw water pump station and Ozone Building server room; replacement of the diesel fuel poli shing units and diesel fuel double containment piping; new vibration monitori ng and alarm equipment for the raw water pumps; internal corrosion repair of the existing high rate wa shwater clarifiers; and replacement of old valve Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  50 actuators on the chemical tanks at the east chemical storage area. In addition, there is a capital improvement project, currently in the bid and award phase, to replace the filter underdrains and media for six existing filters at HTWTP.

Condition. HTWTP is in fair condition. The HTWTP Filters No. 1 to 6 Underdrain Replacement Project will replace the existing filter underdrains with new stainless steel underdrains.

Completion of the underdrain replacement project will restore HTWTP's treatment and delivery capacity to prior to the filter underdrain failures.

RGSR Groundwater Production Wells
Description. Though not one of the six major water treatment facilities in RWS, the RGSR wells are water supply and treatment facilities added to RWS in the last couple of years. To meet dry-year delivery needs and diversify water supply options during nondrought and drought periods, SFPUC has constructed groundwater wells that connect to the San Francisco Water System (SFWS) and RWS under WSIP. These wells are operated as two separate systems: ( 1) San Francisco Groundwater Supply Project and ( 2) RGSR. Groundwater treatment for the nine SFPUC wells will take place at seven chemical feed and monitoring facilities. The four wells that connect to Daly City’s and Cal Water’s systems will receive treatment from their respective utilities. Groundwater treatment varies among the different well sites based on source water quality conditions and may include chloramination, pH adjustment, fluori dation, blending for chromium VI and nitrate, and blending or filtration for manganese. Planning is underway to design and construct additional treatment facilities for removing naturally occurring ammonia in groundwater from a few wells.

Eight wells have received permit approval from SWRCB for conditional use. Start-up testing has been completed at these eight wells. From 2020 to 2021, the wells supplied water to the RWS as part of start-up testing and extended testing. The conditional use permit from SWRCB requires quarterly monitoring of Title 22 parameters for 1 year, and monthly bacteriological monitoring for 18 months of the raw well water. Th is required monitoring was started soon after each well had successfully completed the start- up testing and is expected to be completed by the end of 2022.

There are still outstanding decisions to be made for the long-term operating strategy of the RGSR wells. The Final RGSR Well Operations Plan , reflecting the future operating strategy , will be updated and submitted to SWRCB by the end of 2022.

Maintenance. Functional testing has been completed for all nine RGSR well sites. Extended testing (i.e., 7- week testing) was completed for the Millbrae and Trio (F St reet, B Street, and Colma Boulevard) well stations in the summer and fall of 2021. In the short term, SFPUC intends to operate these four wells as a source of supply for RWS in dry years and will maintain the m as active wells For the long term, SFPUC plan s to phase in the implementation and operation of eight to nine wells through centralized blending and/or treatment. Several alternatives are being assessed, including sending groundwater to San Andreas Reservoir for blending and buffering , followed by treatment at HTWTP ; treating groundwater at a new centralized blending and treatment facility on the Peninsula; and other hybrid alternatives.

Condition. RGSR g roundwater production wells are in good condition , with further improvements scheduled under forthcoming phases. With the construction and commissioning Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  51 of select groundwater facilities completed under Phase 1, the RGSR project has transitioned into the next phase of construction (Phase 2 A). This phase of construction focuses on the implementation of additional O&M improvements for select groundwater facilities. This work includes the addition of flowmeters, variable-frequency drives (VFDs) for existing well pumps, surge anticipation valve modifications, and cathodic protection for wells.

Figure 4-1: Location of RGSR Groundwater Wells

4.2.2.2 Capital Improvements
Regional Water currently has seven active capital projects for its water treatment assets, representing a total capital investment of $340 mil lion. Regional Water also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the seven active large capital projects are provided in the following sections.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  52 Sunol Valley Chloramination Facility Project (Approved Budget: $9.99 Million; Substantial Completion: 2024)
Scope. The primary objective of the project is to increase reliability at the fluoridation facility, SVF, and Dechlorination Facility. The scope of the project includes (1) addressing various deficiencies of the chemical feed systems, controls, and related equipment, which will lower the current maintenance costs of the existing equipment; (2) redesign and commission of the Dechlorination Facility; and (3) upgrade of the main PLC at SVCF to provide better reliability, security, and support for the replaced pump local control panels.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-26.

Table 4-26: Project Milestones Completed During the Current Reporting Cycle Milestone Date Complete
Environmental Review December 31, 2020
65% Design January 29, 2022
95% Design May 24, 2022
SVWTP Ozone Project (Approved Budget: $192.82 Million; Substantial Completion: 2026) Scope. This treatment project involves the installation of a raw water ozonation system at SVWTP to control T&O events. Other major components of this project include (1) 10- inch to 66-inch- diameter piping, elbows, and valves; (2) concrete valve vaults; (3) ozone generator and electrical buildings; (4 ) loop colling water systems , liquid oxygen vaporizer systems , ozone generators, injector systems, contact basin, and destruct systems; (5) pre-chloramination facilities for bromate control; (6 ) instrumentation and controls and shop space; ( 7) solar panels, standby power systems, and high-voltage and electrical eq uipment and distribution systems; ( 8) minor Calaveras Substations upgrades to support the ozone facility power needs; and (9) underground utilities and site improvements.

Milestones Completed During the Reporting Cycle. The milestone achieved by this project during this reporting cycle is summarized in Table 4-27.

Table 4-27: Sunol Valley Water Treatment Plant Ozone Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Conceptual Engineering Report December 30, 2021
Sunol Valley Water Treatment Plant Short-Term Improvements (Approved Budget:
$60.03 Million; Substantial Completion: 2026)
Scope. Short-term upgrades were identified through condition assessments, operations staff observations, review of LOS, subsequent feasibility studies, and alternative analyses at SVWTP .

These upgrades include (1) structural and HVAC improvements at the Administration Building; (2) remodeling of the Water Quality Lab at the Administration Building, including cabinet, Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  53 countertop, sink, plumbing , and flooring replacement , along with mold remediation work; (3) repairs to concrete spalling in the sedimentation basins; (4) replacement of leaking washwater drain valves, up grading of the washwater tank and access system, and install ation of a valve actuator; (5 ) upgrading of the sludge system piping, valves, and monitoring system; (6) upgrading of the chemical piping system; (7 ) remediation of leakage at the expansion joint around settled water pipes from sedimentation basin, and installation of a new fixed washdown system at the sedimentation basin; (8) replacement of flocculator VFDs for the flocculation basins; (9) replacement of corroded air scour piping and chlorine contact tank piping; (10) installation of new flowmeters for the washwater backwash system and chlorine contact tank; (11 ) installation of new lighting and plant intercom and paging systems; and (12) installation of a new server room fire suppression system and plate settler washdown piping system.

Milestones Completed During the Reporting Cycle. The milestone achieved by this project during this reporting cycle is summarized in Table 4-28.

Table 4-28: Sunol Valley Water Treatment Plant Short-Term Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Project planning in progress Pending
Sunol Valley Water Treatment Plant Long-Term Improvements (Approved Budget:
$10.5 Million; Substantial Completion: 2026)
Scope. Long-term upgrades were identified through condition assessments, operations staff observations, review of LOS, subsequent feasibility studies, and alternative analyses at SVWTP .

These upgrades include (1) installation of an emergency eyewash station at the chlorine contact tank; (2) repairs to bird netting deficiencies at the flocculation/sedimentation basins and filters; (3) installation of new bird netting for fluoride storage and the chemical delivery dock; (4) replacement of m ain switchboards 1 and 2, remov al of ATS-1, ATS -2, and ATS -3, and incorporation of functionality into the new switchgear; (5) addition of a redundant 2-megawatt (MW) standby generator with active particulate air filters; (6) replacement of all General Electric power circuit breakers (not all are arc-flash-rated); (7) repairs to the concrete pad and coating at the caustic tank farm; (8) reconfiguration of the Cat-C polymer feed system; (8) installation of the washwater pumps soft starter system; (9) installation of air monitors for the aqua ammonia tanks; and (10) roadway and site improvements.

Milestones Completed During the Reporting Cycle. No major milestones were achieved by this project during this reporting cycle, but the planning phase continued.

Table 4-29: Long-Term Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Project planning in progress Pending
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  54 Sunol Valley Water Treatment Plant Polymer Feed Facility Project (Approved Budget:
$19.05 Million; Substantial Completion: 2024)
Scope. At SVWTP, the new flocculation/ sedimentation basin built in 2013, as well as the other four existing basins that are each rated at a capacity of 40 mgd, were not able to achieve their capacity under all operating and water quality scenarios. A new flocculant aid and polymer system will be built , including (1) polymer feed building with polymer totes and a tote storage area; (2) polymer blending units; (3) batch tanks, tank and tote mixers, and batch tanks polymer transfer pump; (4) polymer feed pumps, piping, and valving; and (5) site improvements.

Milestones Completed During the Reporting Cycle. The milestone achieved by this project during this reporting cycle is summarized in Table 4-30.

Table 4-30: Sunol Valley Water Treatment Plant Polymer Feed Facility Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
35% Design August 17, 2020
HTWTP Filter Underdrain Replacement Project (Approved Budget: $14.4 M; Substantial Completion: 2023)
Scope. Underdrains in two filters in a bank of six have failed since 2019, and replacement of the underdrains is being prioritized to restore HTWTP’s treatment capacity and reliability. The project includes (1 ) removal and disposal of existing filter media , and provision of new filter media; (2) procurement and installation of new stainless steel filter underdrains for six filters; (3) modification of air distribution piping beneath filter underdrains; (4 ) cleaning and recoating of main air distribution piping; and (5) demolition work and concrete work.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-31.

Table 4-31: HTWTP Filter Underdrain Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
AAR May 5, 2021
Conceptual Engineering Report May 7, 2021
50% Design September 2021
95% Design December 2021
100% Design May 2022
Bid and Award June 2022 (bids received)
Notes:

AAR = Alternatives Analysis Report
HTWTP = Harry Tracy Water Treatment Plant
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  55 Regional Groundwater Treatment Improvements Project (Approved Budget: $38.6; Substantial Completion: 2028)
The purpose of this project is to improve the performance of the Regional Groundwater Wells and treatment systems in the South Westside Basin for reliable use during dry years. In normal and wet years, SFPUC will supply treated surface water to Daly City, San Bruno, and Cal Water, to be us ed in place of their typical groundwater supply, thereby increasing the volume of groundwater in storage that can be pumped as supplemental water in dry years. This project will address emerging well water quality issues that require treatment; will provid e additional reliability for treatment systems at the wells; and will evaluate the potential for a consolidated treatment facility (through alternatives analysis only). If a centralized treatment alternative is selected, the estimated project cost could potentially be $250 million, which includes construction of approximately 14 miles of 8-inch- to 24-inch-diameter pipeline, a pump station, storage tanks, treatment facilities, and other ancillary facilities.

Scope. The current project consists of design and construction of facilities at individual well sites, including (1 ) installation of an ammonia analyzer at one site; (2) construction of manganese enclosures at two sites; (3) installation of a building, filtration, and ammonia analyzer at one site; (4) upsizing of pedestal s and tanks for 2-week storage of sodium hydroxide at five sites; (5) upsizing of pedestals and tanks for 2-week storage of liquid ammonium sulfate at seven sites; (6) upsizing of a pedestal and tank for 2-week storage of sodium hypochlorite at one site; (7) installation of a detention (contact) tank to address high levels of ammonia without enclosure at one site; (8) upsizing of pedestals, tanks, and overall chemical systems for a change in chemical concentration from 50 percent to 25 percent at five sites; (9) installation of a chlorine detention (contact) tank to address high levels of ammonia; (10) installation of V enturi meter s or mag meters with dismantling joint inside concrete vault at six sites; (11) removal of bucket elevators for sodium fluoride at seven sites; (12) a study to compare liquid versus powder fluoride; (13) a study of reverse flow (lockout study for minimum shutdown time); an d (14) reimbursement to Cal Water for supporting the project design and construction for the South San Francisco Main well.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-32.

Table 4-32: Regional Groundwater Treatment Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Decentralized Regional Groundwater Treatment
Improvements Final Technical Memorandum
February 18, 2022
Regional Groundwater Treatment Evaluation Final
Report
February 22, 2022
Summary of Levels of Service Impacts
LOSs that are supported by the RWS water treatment capital improvements are provided in Table 4-33.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  56 Table 4-33: RWS Water Treatment Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
SVCF Project  
SVWTP Ozone Project 
SVWTP Short-Term
Improvements  
SVWTP Long-Term
Improvements  
SVWTP Polymer Feed
Facility Project  
HTWTP Filter
Underdrain
Replacement Project
 
Regional Groundwater
Treatment
Improvements Project
 
Notes:

HTWTP = Harry Tracy Water Treatment Plant
RWS = Regional Water System
SVCF = Sunol Valley Chloramination Facility
SVWTP = Sunol Valley Water Treatment Plant

4.3 Water Transmission Assets
SFPUC owns and operates multiple water transmission assets, including tunnels, penstocks, and pipelines. The responsibility for O&M of these assets is divided geographically between both HHWP and Water Supply and Treatment.

4.3.1 Hetch Hetchy Water
HHWP is responsible for the maintenance and operation of multiple water transmission assets that work as a system to transport water from the Sierra Nevada Mountains to the AEP, spanning nearly the entire width of California. These assets include:

Canyon Power Tunnel Granite Portal Valve House Moccasin Penstock Canyon Portal Valve House Holm Penstock Foothill Tunnel Kirkwood Penstock Lower Cherry Aqueduct San Joaquin Pipelines Early Intake Bypass Tunnel and
Pipeline
Mountain Tunnel San Joaquin Valve House
Eleanor-Cherry Tunnel Moccasin Power Tunnel Coast Range Tunnel Cherry Power Tunnel West Portal Valve House
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  57

4.3.1.1 Asset Descriptions, Maintenance, and Condition
Descriptions of the HHWP water transmission assets, along with summaries of their maintenance and condition, are provided in the following sections, organized from upstream to downstream.

A summary of the assets organized by classification is included in Appendix A, in the Upcountry section of Table A-6.

Canyon Power Tunnel
Description. Canyon Power Tunnel, built in 1965, is a 10.8- mile-long tunnel that conveys water from O’Shaughnessy Dam to Kirkwood Penstock. The majority of the tunnel is horseshoe-shaped, and it measures approximately 14 feet by 14. 5 feet. Canyon Power Tunnel includes two adi ts:

North Mountain and Hetchy Adit.

Maintenance. Table 4-34 summarizes maintenance work.

Table 4-34: Canyon Power Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Scheduled every 10 years Inspect for changes in wall conditions, weeps, and debris; not inspected during the reporting cycle
Completed weekly Adit and adit leakage monitored.

Surveillance and
Monitoring
Continuously monitored Turbidity, pressure, and flows monitored continuously via SCADA alarms
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Canyon Power Tunnel is in good condition. It was last inspected in 2009, and the schedule for the next inspection will be determined in the next reporting cycle . During this reporting cycle, no new deficiencies were noted, and the tunnel is fit for service; however, Hetchy Adit requires capital improvements, and a project is currently in progress.

Canyon Portal Valve House
Description. Canyon Portal Valve House is upstream of Kirkwood Penstock and downstream of Canyon Tunnel. Inside the valve house there is a single 96-inch-diameter butterfly valve, as well as the mechanical and electrical equipment necessary for its operation.

Maintenance. Table 4-35 summarizes maintenance work.

Condition. Canyon Portal Valve House is in good condition; however, improvements are recommended to its instrumentation and control components. One of the functions of the Canyon Portal Valve House is to provide protection to the Kirkwood Penstock and Kirkwood Powerhouse in the event of a penstock failure. The system has instrumentation and control installed that would identify the failure event and close the valve, stopping flows to the Kirkwood Penstock. During this reporting cycle, there were multiple events when the valve closed unnecessarily. HHWP crews were able to successfully restore the system without interruption to water deliveries, and adjustments were made to the instrumentation and control to help prevent future events; however, it is recommended that this be further evaluated. Canyon Portal Valve House is fit for service.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  58 Table 4-35: Canyon Portal Valve House Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Valve Trip Test Completed weekly Perform trip test of valve Inspection Completed annually Mechanical inspection of valve, actuator, and associated equipment; valve stems are greased.

Completed weekly Facility inspected by HHWP watershed keeper Surveillance and
Monitoring
Continuously monitored Alarmed and monitored continuously via SCADA Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
Kirkwood Penstock
Description. Kirkwood Penstock (formerly known as Canyon Penstock) is a coated steel pipe asset within the HHWP system that conveys water from Canyon Power Tunnel to Kirkwood Powerhouse. Constructed in 1967, the penstock is an essential component of SFPUC wate r and power reliability , in that it (1) serves as a direct passageway for primary source water from O’Shaughnessy Dam, with little to no redundancy; and (2) is a critical asset for power generation at Kirkwood Powerhouse.

Maintenance. Table 4-36 summarizes maintenance work.

Table 4-36: Kirkwood Penstock Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Inspected by HHWP watershed keeper for leaks, rockfall, and movement
Vegetation
Management
Annually or as needed Removal of vegetation to reduce fire danger and ease inspections
Surveillance and
Monitoring
Continuously monitored Pressure and flows monitored continuously via SCADA alarms; penstock movement is monitored
and alarmed
Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Kirkwood Penstock is in good condition; however, due to its historical stability performance, HHWP monitors the upper reach of the penstock for movement using an automated system. The system was installed in 2018 as a series of risk mitigation measures that were implemented to extend the life of the asset. During the inspection and monitoring performed by HHWP in this reporting cycle, no deficiencies were noted, and all recorded Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  59 movements were within the established thresholds. Additionally, HHWP identified the couplings on Kirkwood Penstock as a “critical spare” item due to their technical design requirements and procurement lead time. HHWP completed the design and award of the procurement package, which included multiple large -diameter couplings for the penstock. The couplings are currently in fabrication and will be delivered to HHWP by the end of 202 2.

Kirkwood Penstock is fit for service.

Early Intake Bypass Tunnel and Pipeline
Description. The Early Intake Bypass Tunnel and Pipeline conveys water from Kirkwood Powerhouse directly into the Mountain Tunnel. The bypass consists of a tunnel on the northern side of the Tuolumne River, leading to a steel pipe crossing the river to Mountain Tunnel on the southern side. The 1 ,725-foot tunnel is horseshoe -shaped, varying in diameter from 1 0 feet to

14.6 feet. The water exits the Early Intake Bypass Tunne l, entering a 29 3-foot long, 9. 5-foot- diameter pipeline that crosses over the Tuolumne River. There is an unused Venturi meter on the downstream end of the pipeline.

Maintenance. Table 4-37 summarizes maintenance work.

Table 4-37: Early Intake Bypass Tunnel and Pipeline Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Scheduled every 10 years Inspects tunnel for changes in wall conditions, weeps, and debris; pipeline lining inspected; not
inspected during the reporting cycle
Completed weekly Above-ground sections and access inspected by watershed keeper for leaks
Surveillance and
Monitoring
Continuously monitored Turbidity, pressure, and flows monitored continuously via SCADA alarms
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Early Intake Bypass Tunnel and Pipeline is in good condition. During this reporting cycle, no deficiencies in condition were noted. An improvement to the Early Intake Bypass Pipeline was made to install a drain valve that could be used to monitor leakage during system shutdowns. The Early Intake Bypass Tunnel and Pipeline are both fit for service.

Eleanor-Cherry Tunnel
Description. Eleanor-Cherry Tunnel is a 1.1- mile-long tunnel that conveys water from Lake Eleanor to Lake Lloyd (a.k.a. Cherry Lake). The tunnel is horseshoe -shaped, and it measures approximately 8.5 feet by 8.5 feet.

Maintenance. Table 4-38 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  60 Table 4-38: Eleanor-Cherry Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Scheduled every 10 years Inspect for changes in wall conditions, weeps, and debris; not inspected during the reporting cycle
Surveillance and
Monitoring
Completed daily Flows estimated daily via mass balance
Note:

PM = preventive maintenance
Condition. The Eleanor-Cherry Tunnel was last inspected in 2017 and is scheduled to be inspected again in 2027. The tunnel is in good condition and is fit for service.

Cherry Power Tunnel
Description. The Cherry Power Tunnel is a 5.6-mile-long tunnel that transmits water from Lake Lloyd (aka Cherry Reservoir) through Granite Portal to Holm Penstock.

Maintenance. Table 4-39 summarizes maintenance work.

Table 4-39: Cherry Power Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Scheduled every 10 years Inspect for changes in wall conditions, weeps, and debris; not inspected during the reporting cycle
Completed weekly Adit inspections
Surveillance and
Monitoring
Continuously monitored Turbidity, pressure, and flows monitored continuously via SCADA alarms
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Cherry Power Tunnel is in good condition and fit for service. The tunnel was last inspected in 2000, and the next inspection is scheduled for 2025.

Granite Portal Valve House
Description. Granite Portal Valve House is upstream of Holm Penstock and downstream of Cherry Power Tunnel. Inside the valve house there is a single 96-inch-diameter butterfly valve, as well as the mechanical and electrical equipment necessary for its operation.

Maintenance. Table 4-40 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  61 Table 4-40: Granite Portal Valve House Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Valve Trip Test Completed weekly Perform trip test of valve Inspection Completed annually Mechanical inspection of valve, actuator, and associated equipment; valve stems are greased
Completed weekly Facility inspected by HHWP watershed keeper Surveillance and
Monitoring
Continuously monitored Alarmed and monitored continuously via SCADA Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Granite Portal Valve House is in good condition and remains fit for service. One of the functions of the Granite Portal Valve House is to provide protection to the Holm Penstock in the event of a penstock failure, similar to Canyon Portal Valve H ouse’s function for Kirkwood Penstock. The system has instrumentation and control installed that would identify the failure event and close the valve, stopping flows to the Holm Penstock . It is recommended that the instrumentation and control assets be assessed and improved as necessary at Granite Portal Valve House, similar to what was recommended for Canyon Portal Valve House.

Holm Penstock
Description. Holm Penstock (formerly known as Cherry Penstock) is a coated steel pipe asset within the HHWP system that conveys water from Cherry Power Tunnel to Holm Powerhouse.

Constructed between 1959 and 1962, the penstock is a critical component of SFPUC wate r and power reliability in that it (1) serves as a direct passageway for primary source water from Lake Lloyd (aka Cherry Reservoir, with no redundancy; and (2) is a critical asset for power generation at Holm Powerhouse.

Maintenance. Table 4-41 summarizes maintenance work.

Table 4-41: Holm Penstock Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Inspected by HHWP watershed keeper for leaks, rockfall, and movement
Vegetation
Management
Annually or as needed Removal of vegetation to reduce fire danger and ease inspections
Surveillance and
Monitoring
Continuously monitored Pressure and flows monitored continuously via SCADA alarms
Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  62 Condition. Holm Penstock was last inspected in 2013 after the Rim Fire and is in good condition.

The exterior coating of the penstock is nearing the end of its life and should be repaired so it can continue to protect the steel from the elements. Holm Penstock is fit for service.

Lower Cherry Aqueduct
Description. The LCA provides SFPUC with access to either Lake Lloyd or Lake Eleanor storage for drinking water purposes in an emergency or drought condition. The LCA includes a small diversion dam on Cherry Creek that routes releases from the Cherry and Eleanor watersheds through a series of tunnels, open canals, and steel pipeline to Early Intake Reservoir.

Maintenance. Table 4-42 summarizes maintenance work.

Table 4-42: Lower Cherry Aqueduct Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed biweekly Inspected by HHWP watershed keeper for leaks, rockfall, and movement
Vegetation
Management
Annually or as needed Removal of vegetation to reduce fire danger and ease inspections
Flush and gate
operation
Completed annually Aqueduct operated annually, pushing water though all gates, tunnels, canals, and pipes; leaks
and constrictions are monitored and fixed
Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
Condition. The LCA is in good condition because multiple maintenance and capital improvements were made over the last 4 years. The LCA is fit for service.

Mountain Tunnel
Description. Mountain Tunnel is a critical water conveyance facility for the Hetch Hetchy System source. Built between 1917 and 1925, Mountain Tunnel extends 19.2 miles from Early Intake Dam to Priest Reservoir. The majority of the tunnel is horseshoe -shaped, and it measures approximately 14 feet by 14.5 feet. The first 7.2 miles of Mountain Tunnel west from Early Intake are unlined, with the exception of small, lined areas at each adit and a short section approximately 400 feet east of South Fork Adit. Nine of the remaining 12 miles of tunnel are lined.

Maintenance. Table 4-43 summarizes maintenance work.

Condition. Mountain Tunnel is currently in only fair condition due to its age and the deficiencies that were noted in recent condition assessments, most notably related to failure of the concrete lining. Improvements to the liner as well as additional improvements are being addressed by the active capital improvement project, which is currently in construction.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  63 Table 4-43: Mountain Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Scheduled every 10 years Inspect for changes in wall conditions, weeps, and debris; visually inspected in 2021 during
construction
Completed weekly Adit inspections, with exception of South Fork Adit Completed monthly South Fork Adit inspection
Surveillance and
Monitoring
Continuously monitored Turbidity, pressure, and flows monitored continuously via SCADA alarms
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Moccasin Power Tunnel
Description. Moccasin Power Tunnel is a 1- mile-long tunnel that conveys water from Priest Reservoir to the Moccasin Penstocks. Most of the tunnel is horseshoe -shaped, and it measures approximately 13 feet by 13 feet.

Maintenance. Table 4-44 summarizes maintenance work.

Table 4-44: Moccasin Power Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Scheduled every 10 years Inspect for changes in wall conditions, weeps, and debris; performed in 2020
Completed weekly Adit inspections
Surveillance and
Monitoring
Continuously monitored Turbidity, pressure, and flows monitored continuously via SCADA alarms
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. A maintenance inspection of Moccasin Power Tunnel was completed in 2019, and a condition assessment is scheduled in 2024. The Moccasin Power Tunnel is in good condition and remains fit for service.

West Portal Valve House
Description. West Portal Valve House is upstream of Moccasin Penstock and downstream of Moccasin Power Tunnel . Inside the valve house there are three 104-inch-diameter butterfly valves, as well as the mechanical and electrical equipment necessary for their operation.

Maintenance. Table 4-45 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  64 Table 4-45: West Portal Valve House Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Valve Trip Test Completed weekly Perform trip test of valve Inspection Completed annually Mechanical inspection of valve, actuator, and associated equipment; valve stems are greased
Completed weekly Facility inspected by HHWP watershed keeper Surveillance and Monitoring Continuously monitored Alarmed and monitored continuously via SCADA Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. West Portal Valve House is in only fair condition due to its age. Historically, the valve house was used as an isolation point for maintenance and construction on Moccasin Penstock ; however, improved safety practices no longer rely on single butterfly valves as an isolation point.

It is recommended to investigate this further to determine whether improvements are appropriate to provide access inside Moccasin Penstock while the Moccasin Power Tunnel remains in service.

Moccasin Penstock
Description. Moccasin Penstock is set of coated steel pipes within the HHWP system that conveys water from Priest Reservoir to Moccasin Powerhouse. Constructed in 1924, with new sections completed in 1969, the penstock is an essential component of SFPUC water and power reliability in that it (1) serves as a direct passageway for primary source water from Hetch Hetchy Reservoir, with little redundancy; and (2) is a critical asset for power generation at Moccasin Powerhouse.

Maintenance. Table 4-46 summarizes maintenance work.

Table 4-46: Moccasin Penstock Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Inspected by HHWP watershed keeper for leaks, rockfall, and movement
Vegetation
Management
Annually or as needed Removal of vegetation to reduce fire danger and ease inspections
Surveillance and
Monitoring
Continuously monitored Pressure and flows are monitored continuously via SCADA alarms
Notes:

San Francisco Public Utilities Commission November 2022  65 Condition. Moccasin Penstock is in fair condition, given its age and deficiencies in its anchor bocks, lining, and coatings. Additional investigation is also recommended on its riveted joints and couplings. The penstock remains fit for service; however, it needs capital improvement.

Foothill Tunnel
Description. Foothill Tunnel is a 16.3- mile-long tunnel that conveys water from Moccasin Reservoir to Oakdale Portal, the entrance to the SJPL s. Most of the tunnel is horseshoe -shaped, and it measures approximately 14 feet by 14 feet. About half of the of the tunnel is unlined rock.

The tunnel crosses beneath Don Pedro Reservoir via the Red Mountain Bar Siphon. Between the siphon and Oakdale Portal , the Rock River Lime Plant adjusts the water pH at the Rock River Shaft.

Maintenance. Table 4-47 summarizes maintenance work.

Table 4-47: Foothill Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Scheduled every 10 years Inspect for changes in wall conditions, weeps, and debris; not inspected during the reporting cycle
Completed monthly Inspection and exercise blowoffs at Brown and Pedro adits
Surveillance and
Monitoring
Continuously monitored Turbidity, pressure, and flows monitored continuously via SCADA alarms
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. A condition assessment of Foothill Tunnel was performed in 2020. Foothill Tunnel is in good condition and fit for service. The next condition assessment is planned for 2030.

San Joaquin Pipelines
Description. There are four SJPLs, but only three (SJPL Nos. 1, 2, and 3) extend the entire 47.5 miles across the San Joaquin Valley. SJPL No. 4 has a 6.7-mile-long eastern reach, beginning at Oakdale Portal; and a 10. 5-mile-long western reach , ending at Tesla Portal. The SJPL s were constructed over an 80-- year period. SJPL Nos. 1 through 4 were completed in 1934, 1953, 1968, and 2014, respectively. The purpose of the pipelines is to convey Hetch Hetchy water across the San Joaquin Valley, from Foothill Tunnel to CRT. Ancillary facili ties, such as throttling stations, crossover valve vaults, metering facilities, and pressure-relief facilities are part of the overall SJPL network.

Maintenance. Table 4-48 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  66 Table 4-48: San Joaquin Pipelines Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Internal Inspection Completed as needed;
sections of SJPL Nos. 2
and 3 were inspected in
2021.

HHWP Water Operations and Engineering inspect
for lining condition, leaks, valve condition
External Inspection Completed weekly Facility inspected by HHWP watershed keeper Valve Box
Maintenance
Completed every
10 months
Blowoff valve and air valve operation
Surveillance and
Monitoring
Continuously monitored Pipeline pressure, flow, and turbidity alarmed and monitored continuously via SCADA; SJPL No. 3,
Section A, monitored for wire breaks
Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
SJPL = San Joaquin Pipeline
Condition. The four SJPLs are currently undergoing a systemic condition assessment. The electro- magnetic in-line inspection of SJPL No. 1 was completed in 2021, and the data are currently being processed. Preliminary results indicate significant pipeline wall thinning due to corrosion.

Pipeline relining, repairs, and sectional replacements are being planned to efficiently improve pipeline reliability. Condition assessments of SJPL Nos. 2, 3, and 4 will be completed between 2023 and 2026. Spot visual inspections of SJPL Nos. 2, 3, and 4 indicate that the pipeline is in serviceable condition. SJPL Nos. 1, 2, 3, and 4 are fit for service; however, SJPL No. 1 will require significant capital improvements in the coming years.

SJPL Valve Houses
Description. A series of valve houses and throttling stations along the SJPLs are used to isolate and control flows through the SJPLs. These include Oakdale Portal, Throttling Station 3/4, Throttling Station 2 East, Throttling Station 2 West, P4J , Emery Crossover , Albers Valve House , Roselle Crossover, San Joaquin Valve House, Pelican Crossover, Tesla UV Valve House, Tesla Portal 1/2 Valve House, and Tesla Portal 3 Valve House. The valve houses are remotely monitored and supervised from Moccasin Control Center.

Maintenance. Table 4-49 summarizes maintenance work.

Condition. There are eight valve houses providing isolation and flow control through the SJPL s.

The original valve houses at Tesla, San Joaquin, and Oakdale are fit for service and in fair condition. The remaining five valve houses were constructed during the SJPL No. 4 construction, circa 2010, and are in good condition. In 2021, the PLCs and remote terminal units were upgraded in the San Joaquin Valve House to improve supervisory monitoring and controls. Unfortunately, due to valves that are not rated for the required pressures and an overall lack of redundancy, the valve houses do not provide adequate isolation to support work inside the pipelines unless the entire Hetch Hetchy System is shut down.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  67 Table 4-49: San Joaquin Pipeline Valve Houses Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Internal Inspection Completed as needed Inspection of lining, leaks, and valve condition; Oakdale Portal Valves inspected in 2021
Weekly Facility inspected by HHWP watershed keeper
Maintenance Completed quarterly Operate and inspect valves, including actuators and manual handwheels
Surveillance and
Monitoring
Continuously monitored Facilities have security alarms that are monitored continuously; pipeline pressure and
flow are alarmed and monitored continuously
via SCADA
Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
Coast Range Tunnel
Description. CRT is a 2 5.1-mile-long tunnel that conveys partially treated Hetch Hetchy water from TTF, just downstream of the SJPL s, to AEP. The finished diameter of the lined tunnel is

10.5 feet. Six construction shafts were used to build the tunnel from 1927 to 1934. All of the shafts were backfilled, except for the Thomas Vent Shaft , which connects the tunnel with the ground surface.

Maintenance. Table 4-50 summarizes maintenance work.

Table 4-50: Coast Range Tunnel Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Scheduled every 10 years Inspect for changes in wall conditions, weeps, and debris; not inspected during the reporting
cycle
Surveillance and
Monitoring
Continuously monitored Turbidity, pressure, and flows monitored continuously via SCADA alarms
Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. CRT was last inspected in 2015 and is scheduled to be inspected again in 2035. The tunnel is in good condition and is fit for service.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  68

4.3.1.2 Capital Improvements
HHWP currently has seven active capital projects on its water transmission assets, representing a total capital investment of $445.2 million. HHWP also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the active large capital projects are provided in the following sections.

SJPL Tesla Valves Replacement (Approved Budget: $3.7 Million; Substantial Completion: 2022) Scope. The project will involve replacing one large-diameter butterfly valve (TUV 101) inside the Tesla Valve Vault so that the SJPL No. 1 can be safely isolated without requiring shutdown of the entire system . This will improve safety when entering the pipeline for maintenance and inspection purposes.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-51.

Table 4-51: SJPL Tesla Valves Replacement Project Milestones Completed During the Current Reporting Cycle
Milestones Completion Date
Completed 100% Design December 2020
JOC 74-15 – Task Order Notice to Proceed for Valve Installation April 2021 Completed Construction March 2022
Note:

JOC = job order contract
SJPL Valve and Safe Entry Improvements (Approved Budget:$142.6 Million; Substantial Completion: 2027)
Scope. The objective of this project is to allow for safe entry into any and all sections of the SJPLs for inspection and maintenance while the remainder of the system stays in operation. The project will be completed in four phases : (1) Phase 1A – Pipeline 2 Tes la and Oakdale Entry Improvements; (2) Phase 1B – Pipelines 3 and 4 Tesla and Oakdale Entry Improvements ; (3) Phase 2 – Pelican, Roselle, Emery and P4J Entry Improvements; and (4) Phase 3 – Tesla Surge Stack.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-52.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  69 Table 4-52: SJPL Valve and Safe Entry Improvements Project Milestones Completed During the Current Reporting Cycle
Phase Milestones Completion Date
Conceptual Engineering Report Rev C (Final) March 29, 2021 Phase 1A 65% Design for HH-1005 (Phase 1A) May 2021
95% Design for HH-1005 (Phase 1A) July 2021
100% Design for HH-1005 (Phase 1A) October 2021
Issued Notice to Proceed for Constriction HH-1005 (Phase 1A) May 2022 Phase 1B 65% Design for HH-1006 (Phase 1B) July 2021
95% Design for HH-1006 (Phase 1B) October 2021
100% Design for HH-1006 (Phase 1B) February 2022
HH-1006 Construction Contract Advertisement April 2022
Phase 2 None

Phase 3 65% Design (HH-1009) March 2022
95% Design (HH-1009) May 2022
Mountain Tunnel Improvement Project (Approved Budget $238.6 Million; Substantial Completion: 2027)
Scope. The project provides design and construction of major tunnel repair and rehabilitation work; adit and tunnel entry improvements; access road improvements; and installation of a new flow-control facility at Priest Reservoir to ensure that the tunnel can reliab ly provide drinking water to customers for the next 100 years.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-53.

Table 4-53: Mountain Tunnel Improvement Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Construction Contract HH-1000R Award October 13, 2020
Construction Contract HH-1000R Notice to Proceed January 29, 2021 Excavation of the Priest Reservoir Flow-Control Facility May 2021 to present Priest Adit Tunnel excavation April 2021 to present
Safety and road improvements: Adit 8/9 road, Adit 5/6 road, South Fork Road, and Rickson Road
March 2021 to present
Survey of tunnel and of siphon at South Fork; geological evaluation of South Fork siphon; installation of rock dowels at the Priest Adit Tie-In
2022 Shutdown (January through
March)
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  70 Kirkwood Penstock (Approved Budget $3.5 Million; Substantial Completion: 2022) Scope. The scope of the project included internal and external inspections, development of an EAP and Penstock Monitoring Plan, repairs to the damaged saddle, installation of a monitoring system, and procurement of emergency spare equipment.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-54.

Table 4-54: Kirkwood Penstock Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Purchase Order for Spare Bolt Split-Sleeve Couplings February 2, 2022 Delivery of Spare Bolt Split-Sleeve Couplings June 30, 2022 Cherry-Eleanor Pumps (Approved Budget $1.4 Million; Substantial Completion: Not Applicable)
Scope. The scope for this project is to complete an AAR and Conceptual Engineering Report to support the objective of replacing and upgrading the pumps in Cherry Pump Station with units that work with current operating strategies.

Milestones Completed During the Reporting Cycle. The project is scheduled and budgeted to begin in 2024; therefore, no milestones were achieved during this reporting cycle.

Canyon Tunnel Rehabilitation (Approved Budget $8.4 Million; Substantial Completion: 2026) Scope. The scope for this project is to complete the in stallation of a new reinforced concrete plug downstream of the existing plug at the Hetchy Adit, to reduce leakage and increase the reliability of the system.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-55.

Table 4-55: Canyon Tunnel Rehabilitation Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Issued Notice to Proceed for PRO-0085.B task order to provide project support during planning, design, and construction April 2022
Moccasin Penstock Rehabilitation (Approved Budget $47.3 Million; Substantial Completion:
2027)
Scope. The scope of this project includes rehabilitation of anchor blocks, penstock coating, penstock saddles, air valves, large-diameter butterfly valves, bifurcation sections, and flow meters; and upgrade of electrical systems, powe r transformers, the standby generator in West Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  71 Portal Valve House, and bulkhead isolation valves in the surge tower. The scope does not include the replacement of all hammer-forged welded steel pipe (WSP).

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-56.

Table 4-56: Moccasin Penstock Rehabilitation Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
External Inspection (JOC-074) December 16, 2020
Internal Inspection (JOC-065R) February 26, 2021
Condition Assessment Report (Final) October 2021
Structural Evaluation Report (Draft) May 27, 2021
Structural Evaluation Report (Final) November 21, 2021
NAR April 2022
Note:

JOC = job order contract
NAR = Needs Assessment Report
Summary of Levels of Service Impacts
LOSs that are supported by the HHWP water transmission capital improvements are provided in Table 4-57.

Table 4-57: HHWP Water Transmission Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
SJPL Tesla Valve
Replacement   
SJPL Valve and Safe
Entry Improvements   
Mountain Tunnel
Improvement Project    
Kirkwood Penstock   
Cherry-Eleanor Pumps    
Canyon Tunnel
Rehabilitation   
Moccasin Penstock
Rehabilitation   
Notes:

HHWP = Hetch Hetchy Water and Power
SJPL = San Joaquin Pipeline
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  72

4.3.2 Regional Water
WSTD is responsible for the maintenance and operation of the large -diameter transmission pipelines west of the AEP to the terminal reservoirs in San Francisco. WSTD’s water transmission system comprises pipelines and tunnels that range greatly in terms of installation date, pipeline material, pipeline condition, and operational importance. Current inventory is shown in Table A-6 in Appendix A. Figure 4-2 presents a graphical summary of pipeline and tunnel installations by material and installation date . A graphical representation of cumulative pipeline and tunnel inventory by material and installation date is shown on Figure 4-3.

Figure 4-2: Linear Feet of Pipelines and Tunnels by Material and Installation Decade

0 100,000
200,000
300,000
400,000
500,000
600,000
700,000
Linear Footage
Decades
Pipe Installation
Steel
Cast Iron
PCCP
RCP
Concrete
Tunnel
Unknown
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  73 Figure 4-3: Cumulative Pipelines and Tunnels Inventory

Transmission projects completed by the Spring Valley Water Company between 1890 and 1930 were constructed using either cast iron or wrought steel. As of today, there are no cast iron pipelines remaining in RWS. The last reaches of RWS with cast iron constr uction were decommissioned in the fall of 2014 , after the Bay Tunnel was brought into service. Joints for wrought-steel pipelines were riveted, as were the longitudinal seams that sealed the edges of the rolled-steel plates. Active pipelines from this period are a portion of the original SAPL No. 1, the 54-inch portion of CSPL No. 2, and BDPL No. 1.

For a brief period during the 1920s, design for large- diameter pipelines used a longitudinal mechanical “lockbar” that fastened the edges of rolled-steel plates, thus replacing longitudinal rivet courses. Only one such pipeline remains active, the 54-inch SAPL No. 2, constructed in 1928; SAPL No. 2 has riveted joints (except north of Merced Manor, where the pipeline is welded steel).

Many sections of the lockbar pipeline are now being considered for replacement, following a major failure in July 2015 that revealed significant corrosion. In April 2019, construction for the replacement of approximately 6,500 linear feet of 54-inch lockbar pipeline was completed in the City of San Bruno.

WSP was developed in the early 1930s, and most construction contracts for RWS used WSP during this time. Longitudinal or spiral seams are welded in the shop during fabrication with an automatic arc-welding process. Circumferential joints are arc welded in the field by hand. 0 500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
Linear Footage
Decades
Pipe Inventory
Steel
Cast Iron
PCCP
RCP
Concrete
Tunnel
Unknown
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  74 Also during the 1930s, reinforced concrete cylinder pipe ( RCP) was developed: a steel cylinder with high-strength concrete cast on both sides of the cylinder and reinforcing steel bars embedded in the concrete outside the cylinder. Portions of BDPL Nos. 2 and 3, the upstream portion of BDPL No. 1, and Alameda Siphon No. 1 are RCP.

Prestressed concrete cylinder pipe (PCCP) was developed in the 1950s. The design used less steel in the pipe construction, resulting in a lower material cost. The savings were achieved by relying on high-strength wire wound to a high tension around a concrete core to develop compressive strength in the pipe. In the 1960s, SFPUC began to offer PCCP as an option to bidders for pipeline construction. Two sections of BDPL No. 4, Alameda Siphon No. 3, San Antonio Pipeline, CSPL No. 3, and the Crystal Springs Bypass Pipeline were constructed with PCCP , for a total of 28 miles, all completed by 1988. In addition, HHWP has approximately 6.25 mil es of PCCP .

Because PCCP can fail suddenly with catastrophic COF, SFPUC no longer considers PCCP as an option for new pipelines.

Based on current condition assessment data, most of the PCCP pipelines are shown to be in good condition and safe to operate; however, SFPUC inte nds to eventually replace the existing PCCP with WSP. To replace all PCCP in RWS would be a huge undertaking that will likely cost hundreds of millions of dollars. SFPUC will continue to operate the pipelines with PCCP but will perform inspections every 10 years to monitor for a change in condition.

Appendix A provides other pi peline and tunnel specifications, including length, capacity, and installation date. In addition to this report, SFPUC’s “Data Book” (updated in 2011) provides extensive detail on pipelines and tunnels.

WSIP added seven new conveyance facilities: Alameda S iphon No. 4, San Antonio Backup Pipeline ( SABPL), New Irvington Tunnel (Irvington Tunnel No. 2), BDPL No. 5, New Crystal Springs Bypass Tunnel, an extension of SAPL No. 3, and SJPL No. 4. Additionally, 16 sections of CSPL No. 2 were repaired. The 10-Year CIP also includes placeholder pipeline R&R projects. To date, these projects include replacement of additional reaches of SAPL No. 2 and additional repairs to CSPL No. 2 not covered under WSIP; additional seismic upgrades to SAPL Nos. 2 and 3 not covered under WSIP; lining repair to BDPL Nos. 1 through 4; and repair or replacement of BDPL No. 4, Sections A and D (PCCP sections).

4.3.2.1 Multi-Asset Maintenance Activities
Pipeline/Tunnel Maintenance Program and Condition Assessments Regional Water has created a schedule for inspecting approximately 250 miles of pipeline over the next 20 years (see Appendix C.: 20-Year Pipeline Inspection Schedule). This schedule was created using a multi-step process based on a pipeline’s likelihood of failure and the consequences of failure model. This process emphasized public safety by prioritizing inspections for pipelines that have the highest possibility of catastrophic failure and are near public or critical infrastructure.

Inspections on the schedule are listed by quarters (generally listing the first day of the quarter as a placeholder for the inspection in that quarter). Once the actual date is determined, the inspection date on the schedule changes accordingly. After pipelines have been inspected, the pipeline condition information from the inspection is used to make an informed decision when prioritizing Capital Improvements Projects.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  75 The following scheduled inspections are planned for FY 23 and FY24:
• SAPL No. 2 (Steel) R12 to R20
• BDPL No. 4 (PCCP), D10 to D20
• Palo Alto Pipeline (Steel), F6 to F60
• BDPL No. 3 (Steel), C26 to C40
• BDPL No. 4 (Steel), D26 to D40
• SSPL (Steel), M30 to M50
• Hillsborough Tunnel and SSPL (Steel), M20 to M30
Valve Maintenance Program and Condition Assessments
RWS includes more than 350 valves of various sizes, types, functions, and periods of installation.

A complete 2022 inventory of main-line valves of the transmission system is shown in Table A-8 in Appendix A (a complete description for valves west of the CRT is housed in WSTD’s Valve Book Database). Bypass valves and service connection valves are not included. Approximately 50 major valves were added under WSIP. In most cases, valves more than 50 year s in age have been rebuilt or replaced.

Many new valve lots were added between 2001 and 2012 (Figure 4-4), just prior to and as part of WSIP. These include the cross -over valve lots on BDPL Nos. 3 and 4, where six facilities were completed, with the final two substantially completed in FY 12. These valve lots significantly improve SFPUC’s ability to operate around unplanned outages of one of these pipelines. The Paseo Padre and Grimmer valve lots on BDPL Nos. 1, 2, and 5, and the Tissiack/Crawford vaults on BDPL Nos. 3 and 4 support emergency earthquake recovery by enabling the system to be isolated on either side of the Hayward Fault.

Figure 4-4: Number of Valves Installed by Decade

3 33
16 24
58 23
9 28
58 116
0 0
20 40
60 80
100
120
140
1890 1930 1940 1950 1960 1970 1980 1990 2000 2010 2020
Number of Valves Installed
Decade
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  76 In the San Pedro Valve Lot, two valve vaults were seismically upgraded, electric valve operators were modified, a new air valve was installed, and miscellaneous site drainage improvements were made. Elsewhere under WSIP, a variety of valves (line and cross -over) were replaced/ added in SAPL Nos. 2 and 3.

The valve exercise program was enhanced in 2008 to extend the life of installed valves. It is designed to extend the useful life of valves, increase reliability, and reduce life -cycle costs. The program is based on specifications outlined in the valve manufacturers’ O&M manuals, and on best management practices (BMPs). The O&M manuals and BMPs establish the level and frequency of maintenance required. Valves are primarily exercised by utility plumbers and occasionally by the machine shop crew and watershed keepers. The goals are to assess the condition of the valves, actuators, and appurtenances, and to determine operational capabilities and reliability.

The current valve exercise program is structured to be consistent with the American Water Works Association (AWWA) standards; all valves are exercised at least once every 2 years (line valves and cross-over valves). If full operation of the valve does not disrupt system operations, the valve is fully opened and closed in the exer cise. If full operation of the valve is not possible due to operational constraints, the valve is “bumped,” i.e., opened (or closed, if already open) at approximately 10 to 15 percent, then closed (or returned to fully open).

Prior to WSIP completion, ther e were 264 valves in the WSTD transmission system. With completion of BDPL No. 5, new BDPL Nos. 3 and 4 cross-over vaults, Alameda Siphon No. 4, SAPL No. 3 extension, Calaveras Dam, Alameda Creek Diversion Dam, and LCSD, the number has now increased to 368 valves (not including valves at the treatment plants). Figure 4-5 shows that the current target for WSTD is to exercise 184 valves every year, or all 368 valves ever y 2 years.

Figure 4-5: Number of Valves Exercised at Water Supply and Treatment Division from 2011 through 2022

132 132
177 178 178 178 178 178 178 184 184 184
278
166
136 120
47 87
149
111
130
154 157 145
0 50
100
150
200
250
300
FY 11 FY 12 FY 13 FY 14 FY 15 FY 16 FY 17 FY 18 FY 19 FY 20 FY 21 FY 22 Number of Valves Exercised
Valve Exercising Target vs. Valves Exercised
Valve Exercising Target Valve Exercised
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  77 The other valve exercise program component addresses valves housed in water treatment facilities that are exercised and maintained by the operations staff. Most valves in water treatment facilities are routinely operated as part of normal operations.

Cross- Connection Mitigation for Transmission Pipeline Appurtenances The WQD is responsible for management and implementation of CCSF’s cross- connection controls program, in compliance with all applicable regulations and standards. The California Waterworks Standards, including cross- connection prevention requirements for air valves and blow off valves, went into effect in 2008. The Waterworks Standards apply to new facilities and existing facilities requiring repairs (most SFPUC pipelines were built well before the Waterworks Standards, some as far back as the 1920s). Since the Waterworks Standards went into effect, SFPUC has been focused on WSIP implementation. As part of WSIP implementation and Waterworks Standard compliance, SFPUC developed standard drawings for appurtenances (e.g., air valves and blow-offs), referenc ing them in specifications in WSIP as well as CIP contract documents. With WSIP winding down, SFPUC proa ctively and voluntarily implemented the RCCCP to address pipeline appurtenances at older RWS facilities (i.e., facilities constructed prior to the adoption of the Waterworks Standards that were not part of WSIP).

RCCCP was initiated in 2016 as a collaborative effort between WQD and WSTD. The project sought to upgrade applicable appurtenances in RWS—air vacuum valves ( AVVs), air release valves (ARVs), blowoff valves (BOs), and the vaults that house these appurtenances—to the latest standards, above and beyond regulatory requirements. The applicable regulations and standards are:
• California Code of Regulations (CCR), Title 17, Sanitation; • CCR, Title 22, Waterworks Standards;
• AWWA Manual of Water Supply Practices M51;
• AWWA Standard C512; and
• WSTD Standard Drawings.

With the implementation of RCCCP , AVVs and ARVs in RWS will be installed with the vent opening above grade; above the calculated 100- year flood water level; readily accessible for maintenance; constructed and designed to prevent exposure to rainwater or runoff, vandalism, and birds, insects, rodents, or other animals; and fitted with a downward-facing screened vent or a domed and screened cap.

RWS has more than 2 50 miles of pipeline and tunnel that transmit potable water to w holesale customers and is fitted with more than 1,700 installed appurtenances of various sizes, types, functions, and periods of installation throughout the East Bay, South Bay, and Peninsula. The scope of the RCCCP includes:
• review of applicable regulations, and AWWA and SFPUC standards; • development of checklists and templates for field assessment surveys; • visual field assessments of all appurtenances and related vaults; • identification of mitigation requirements and development of recommendations; • grab field sampling of accumulated water in vaults, as needed; • identification of inconsistencies in the current database of appurtenances and GIS; Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  78 • assessment reporting for each pipe segment; and
• implementation of mitigation measures for identified appurtenances, and revision of documents accordingly.

Due to the large number of appurtenances and pipelines in RWS, the pipelines were grouped and prioritized for field assessment starting with the longest pipeline segments to obtain representative data. Table 4-58 lists the tentative pipeline assessment and prioritization schedule, which is subject to refinement, depending on the number of appurtenances, assessment findings, future shutdowns, site accessibility, resources availability, mitigation progress, weather conditions, and any unforeseeable factors.

Table 4-58: Prioritization and Schedule for Cross-Connection Pipeline Assessment and Mitigation
Pipeline Segments
Field Assessment – Tentative
Schedule
Mitigation – Tentative
Schedule
BDPL Nos. 3 and 4 February 2016 through March 2017
(Completed)
May 2019 through October 2023
BDPL Nos. 1, 2, and 5 April 2017 through June 2018
(Completed)
June 2020 through October 2023
CSPL Nos. 2 and 3, and
SSPL
July 2018 through September 2019
(Completed)
November 2023 through February 2025
Sunol Region and CSPL
No. 1
October 2019 through December 2020
(Completed)
March 2025 through June 2025
SAPL Nos. 1, 2, and 3 March 2021 through December 2022 July 2025 through May 2026 Palo Alto Pipeline January 2023 through April 2023 June 2026 through September 2026 CSSAPL January 2021 through February 2021
(Completed)
October 2026 through December 2026
Notes:

BDPL = Bay Division Pipeline
CSSAPL = Crystal Springs-San Andreas Pipeline
CSPL = Crystal Springs Pipeline
SAPL = San Andreas Pipeline
SSPL = Sunset Supply Pipeline
After assessments are completed, the project prioritizes mitigation recommendations using a risk- based approach. In general, appurtenances are deemed high risk when there is a relatively high probability of the water level reaching the valve opening inside the vault. Priority levels are described in the following paragraphs.
• High Priority: The AVV is below the riser’s vent; the BO blind flange is not installed; or the BO does not have an air gap.
• Medium Priority: The AVV overflow rim is in the middle of the riser’s vent; or the riser vent does not maintain a minimum of 6 inches of clearance above grade.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  79 • Low Priority: The AVV overflow rim is above the riser’s vent but missing items like bug screens; or the gate valve on the BO is not certified by NSF (formerly known as the National Sanitation Foundation).
• None: The appurtenance meets current standards.

The field assessment for BDPL Nos. 1, 2, 3, 4, and 5; CSPL Nos. 1, 2, and 3; SSPL; Sunol Region; and CSSAPL of RWS were completed up to the San Francisco County line, as shown in Table 4-58.

The completed assessed pipelines are approximately 200 mil es in total length, with 1,207 appurtenances. The project included completion of field assessments of 186 appurtenances for CSPL No. 1, Sunol Region , and CSSAPL in 2020 and 2021. Appurtenances are currently being assessed for SAPL Nos. 1, 2 and 3, a network of pipelines with more than 160 appurtenances, anticipated to be completed in 2022. The last set of pipelines for field assessment will be the Palo Alto Pipeline in the Peninsula, which is planned to be completed in 2023.

The assessment reports include appurtenance information; noncompliance findings; the Federal Emergency Management Agency’s 100- year flood level, where applicable; and mitigation recommendations. The report also lists appurtenances that do not meet the current standards; that are vulnerable to flooding due to urban development; and that have been added, removed, or modified and do not match reference data from GIS and Maximo used by SFPUC.

Figure 4-6: Mitigation Priority Breakdowns for BDPL Nos. 1 through 5; CSPL Nos. 1, 2, and 3; SSL; Sunol Region; and CSSAPL

The site assessment surveys for BDPL Nos. 1, 2, 3, 4, and 5; CSPL Nos. 1, 2, and 3; SSPL; Sunol Region; and CSSAPL found that of the 1,207 appurtenances installed, 44 percent of the High Priority,
(533, 44%)
Mid Priority,
(135, 11%)
Low Priority,
(331, 28%)
No Mitigation
Required,
(208, 17%)
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  80 appurtenances are high priority; 11 percent are medium priority; and 28 percent are low priority, not meeting current standards, given that most of the pipeline sections of BDPL Nos. 1 through 4 were constructed from 1933 to 1967.

Compared to the 2020 SRWS report, the revised field assessment schedule in Table 4-58 indicates about 12 months of delay as a result of finding approximately 100 more appurtenances during site surveys than the original estimated for CSPL No. 1, Sunol Region, and CSSAPL. In addition, the project team identified and assessed 14 additional appurtenances along the Sunset Supply/ San Andreas branch transmission pipelines, which were not previously included in the appurtenances list for field assessment. Also, the COVID-19 pandemic, which began in 2020, caused close to a year of delay when nonessential field activities were suspended due to safety concerns.

WSTD started implementing mitigation measures for BDPL Nos. 1 through 5 in September 2017.

Mitigation work normally requires sign ificant prep aration, including site visits to every appurtenance to measure and document required mitigation , such as raising existing vaults; installing and replacing vault covers; raising existing air valves; adding “goosenecks” to existing air valves; lowering surrounding grades; installing bug screens to air vents; sealing below-grade vents; removing all galvanized fittings and piping; and replacing corroded bolts, fittings, and non-NSF certified materials.

The mitigation work started slowly due to WSTD ’s resource constraints (e.g., plumbers and welders); other higher-priority maintenance work; new hiring and associated training; supply chain issues; and challenges related to the COVID-19 pandemic. In the last year and a half, WSTD has increased resource allocation to this project, resulting in a higher mitigation rate than prior years. As of December 2021, WST D has completed 337 mitigations for the BDP Ls. The revised mitigation schedule in Table 4-58 takes the most recent mitigation rate into consideration . Also, CSSAPL is moved to be the last pipeline segment for mitigation because it is a raw water forced main and not technically subject to cross-connection standards. Once the mitigation measures are implemented for the Palo Alto Pipeline, SFPUC will decide whether to proceed with mitigation for valves and vaults on CSSAPL.

The benefit of completing RCCCP goes beyond upgrading AVVs, ARVs, BOs, and vaults to the latest cross-connection standards. WSTD has leveraged this project to also repair damaged l ids, add missing ladders, replace unsafe ladders, replace corroded fittings, and relocate appurtenances to more accessible locations away from traffic. As field assessments are conducted, valve riser and vault locations are updated in GIS and Maximo, effec tively updating the asset registry for these assets.

Corrosion Monitoring/Maintenance Program
The corrosion protection program is one of the cornerstones of SFPUC’s as set management and PM efforts. Investments in the program are cost-effective, greatly extend the useful life of buried assets, and reduce unplanned outages. In FY 10, SFPUC and Schiff Associates updated the corrosion master plan. The primary objectives of the effort were to update the state of the corrosion protection system for buried assets in the Bay Area.

Prioritized projects derived from the plan were then sequenced in the CIP over 8 years. The master plan first assessed transmission pipelines to determine the adequacy of corrosion protection of the existing system. Then the master plan made recommendations to repair Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  81 inadequacies and provide improvements for ideal corrosion protection. The cost of repairs and improvements was estimated to be between $18.3 and $22.1 million in 2010. WSTD started implementing the recommendations in FY11, and h ave completed repairs and improvements over the last 10 years. Projects that save the most money and protect the longest stretches of assets are implemented first. The scope of work is implemented over many years to reduce operational, construction, and staffing conflicts. Coordination efforts include acquiring service agreements from the power utilities, determining the ROWs , permit reviews from local City jurisdictions along the Peninsula and East Bay , and outreach to adjacent property owners. Figure 4-7 summarizes the progression over time of CP on WSTD transmission pipelines.

Figure 4-7: Cathodically Protected Transmission Pipeline 2 The 2010 corrosion master plan identified corrosion potential and vulnerabilities from local ground conditions ( e.g., corrosive soil or stray current) on 230 miles of transmission pipelines.

With these field data, the study determined the adequacy of existing corrosion protection systems. Using those results, the study determined additional corrosion protection projects (including maintenance and monitoring work) that would most effectively and efficiently extend the remaining useful life of pipelines and buried assets.

In 2010, the condition assessment performed as a part of the master plan found that existing CP systems on the WSTD transmission lines were operating at less -than-adequate levels. Of the cathodically protected pipelines, only 15 percent of the linear length was adequately protected; the remaining 85 percent received only partial to no protection, leaving the pipeline subject to corrosion. Note that since the implementation of the 2010 corrosion master plan, CP of the transmission system has improved 5 to 10 percent annually.

2 Does not include SJPLs.
37 50
75 100
115
135
160
190
0 23
46 69
92 115
138
161
184
207
230
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2012 2013 2014 2015 2016 2017 -
2019
Phase 1
2020 -
2024
Phase 2
2023 -
2027
Phase 3
Miles
Percent
 Actual Corrosion Protection Estimates
 Projected Corrosion Protection Estimates
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  82 Based on the analysis, many of the pipelines in the P eninsula and South Bay are subject to stray currents. This phenomenon is typically the result of direct current (DC)-powered light-rail transit systems, or one of the numerous other buried utilities applying CP in the vicinity of WSTD pipelines.

The report also indicated that the bulk of the pipeline alignments were installed in corrosive soils.

The soil corrosivity is of concern due to the age of the infrastructure; specifically, that as pipeline coatings age they begin to deteriorate, exposing pipeline steel where corrosion is likely to occur.

The more corrosive the soil, the higher the corrosion rate will likely be, resulting in exacerbated metal loss or loss of pipeline wall thickness.

Remediation of existing CP systems and conducting extensive studies at the areas identified in the report are relatively inexpensive when compared to construction costs of structures such as pipelines and pump stations. Projects were categorized by the type of corrosion protection (for example, electrical isolation) and by pipeline to bring the transmission system to an i deal protected state against corrosion.

Information is gained from planning efforts , such as results of internal pipeline inspections, liquefaction conditions, locations of earthquake fault zones, criticality of particular pipelines to the Bay Area deliver y capacity, adopted LOS, and, to some extent, the adjacent land use and associated liabilities (i.e., public safety and claims) in the event of a pipeline leak or failure. This information is then used in conjunction with the results of the corrosion prote ction program to guide and prioritize maintenance, R&R, and capital planning.

Implementation of corrosion protection projects also requires knowledge of concurrent maintenance or capital projects, because implementation costs are significantly reduced when pipelines are taken out of service for more than one purpose. Similarly, many recommended corrosion protection projects become unnecessary if assets will be replaced under the current capital program, such as the submarine sections of BDPL Nos. 1 and 2.

SFPUC also performed an in-depth analysis of the major external corrosion-related issues for all the transmission pipelines identified in the updated corrosion master plan. Detailed recommendations, including preliminary plans and specifications, were provi ded for all necessary corrective actions.

Active corrosion protection program elements and recent accomplishments from FY21 are listed in the following sections, along with plans for FY22 and beyond.

New Rectifier CP System
Rectifiers are used to convert alternating current ( AC) power to DC power for CP systems. The negative terminal of the rectifier is connected to the pipeline, and the positive terminal of the rectifier is connected to the anode bed. A rectifier consists of a circuit breaker, diodes, and a step- down transformer with various coarse and fine taps for voltage adjustment.

In addition to renovating the existing rectifiers, the in -depth analysis identified additional CP systems that would be needed to bring the corrosion protection level of the underground pipelines up to the protection criteria established by the National Association of Corrosion Engineers. The CP system consists primarily of the rectifier and deep anode. In FY15, SFPUC used Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  83 field survey information obtained from the in -depth analysis to put together a CP plan for installation of additional CP systems. Due to the many different locations identified for additional CP in the Peninsula and East Bay, the plan would be to prepare the construction bid packages in three separate phases by groups of pipelines. Table 4-59 describes the three phases and their corresponding scopes.

Table 4-59: Cathodic Protection for Water Supply and Treatment Division Transmission Pipelines at Various Locations
Phase #/Contract No. Fiscal Year Scope
Phase 1/Contract
No. WD-2770
Design: FY15 – FY16
Construction: FY17 –
FY19
Provide and improve the level of corrosion
protection for the following pipelines: CSPL No. 1,
CSPL No. 2, SAPL No. 1, and SAPL No. 2. The
pipelines are along San Francisco, Daly City, South
San Francisco, San Bruno, and Millbrae. During
Phase 1
, 10 new rectifiers and approximately 45 new
test stations were installed.

Phase 2/Contract
No. WD-2845
Planning/Design:

FY19 – FY22
Construction: FY23 –
FY24
Provide and improve the level of corrosion
protection for the following pipelines: Palo Alto;
and BDPL Nos. 1, 2, 3, and 4. The pipelines are
along Stanford, Menlo Park, Palo Alto, Los Altos,
Mountain View, Newark, and Fremont. During
Phase 2, there will be 11 new rectifiers and
approximately 200 new test stations installed.

Phase 3/Contract
No. TBD
Planning/Design:

FY23 – FY24
Construction: FY24 –
FY27
Provide and improve the level of corrosion
protection for the following pipelines: Alameda
Siphon Nos. 1 and 2, Calaveras effluent and influent
lines, SSPL, and SVWTP effluent line. The pipelines
are along Sunol, Fremont, Hillsborough,
Burlingame, Millbrae, South San Francisco, Colma,
Daly City, and San Francisco. During Phase 3, there
will be 20 new rectifiers and approximately 50 new
test stations installed.

Notes:

BDPL = Bay Division Pipeline
CSPL = Crystal Springs Pipeline
FY = fiscal year
SAPL = San Andreas Pipeline
SSPL = Sunset Supply Pipeline
SVWTP = Sunol Valley Water Treatment Plant
TBD = to be determined
The first phase provided 10 additional rectifiers with deep anodes to the transmission pipelines between San Francisco and Millbrae. T he first phase also included installation of 45 additional test stations along the pipeline alignments; these stations wer e intended to accommodate the upcoming pipe -to-soil potential surveys (originally, 80 test stations were planned, but local agencies have been reluctant to issue permits along their ROWs). Fewer test stations translate to more time spent on performing corrosion surveys ; nonetheless, due to the protection provided by rectifiers and anodes, the overall corrosion protection of the pipelines is not compromised.

Construction for the first phase has been completed. The second and third phases will follow with an additional 33 rectifiers and deep anode columns, which will cover transmission pipelines in Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  84 the Peninsula and the East Bay. It is anticipated that 300 or more corrosion test stations will be installed as part of the second and third phases.

In FY21 and FY22, SFPUC staff continued to coordinate with Pacific Gas and Electric Company (PG&E) to study the power source locations, which resulted in the plans for 11 new rectifiers for the second contract. SFPUC staf f is coordinating with local jurisdictions (Redwood City, Palo Alto, Stanford, Mountain View, Los Altos, Newark, and Fremont) to procure the permits needed to install the rectifier cabinets near the city sidewalks; anodes and test stations on city streets; and cable connections from t he Phase 2 pipelines to the CP systems. SFPUC developed the design drawings and specifications for the bid package to construct 11 new rectifiers and 200 new test stations. For FY23 to FY24, SFPUC will coordinate with PG&E to study the power source for 20 new rectifiers, and to develop the design drawings and specifications for the third phase.

From FY16 to FY18, SFPUC performed a biennial survey to evaluate the existing state of the CP system and determine whether any remedial action was necessary for the corrosion control of the transmission pipelines. For FY22 to FY23, SFPUC will continue to perform the biennial survey to confirm that the CP system is still providing the expected protection level, and to continue making adjustments to the CP system as needed.

New Remote Monitoring Units to Monitor Rectifiers
The remote monitoring units ( RMU) allow SFPUC to remotely monitor the entire CP rectifier system via the Internet. Alarm parameters can be set to notify staff via email or text message in case of loss of AC power, out-of-range pipe-to-soil potentials, out-of-range current output, etc. Once the notification is received, staff will be able to remedy issues at each rectifier. Without the RMUs, staff would need to physically visit each site to manually read this information. SFPUC installed 10 more RMUs in FY18-FY19 to monitor the new rectifiers installed in the first contract. There are 56 existing RMUs that monitor the existing rectifiers currently providing CP for the transmission pipelines. In FY21 and FY 22, SFPUC continued to perform routine maintenance on the RMU s, most notably upgrading the cellular communications modules on each unit to the 4G service and replacing some units with newer antennas. The routine maintenance with RMUs is being addressed by corrosion consultants. In general, RMUs have performed in accordance with the design.

CP Test Stations
CP test stations are essential for providing an easily accessible above -ground direct connection point to the pipelines for corrosion surveys. The test station typically consists of two wires, bonded to the pipeline underground and terminating on a test board either in a box flush to grade or on a post. It is important for survey efficiency to have the test stations at regular intervals along the pipeline alignment. SFPUC installed 45 new test stations in the first contract in FY18. About 200 new test stations are planned to be installed during the second contract in FY23 and FY24.

Pipeline Isolation/Continuity
Pipeline isolation and pipeline continuity are critical elements to establish the limited boundaries of CP. To effectively achieve the adequate levels of CP , protected pipeline segments must have continuity (through welded joints or bonding cables) from one piece of pipe (generally 4 0 feet long) to the next. The ends of the protected segment must be isolated using insulating flange kits.

When these elements are not properly installed or when the y fail, repairs (mostly through Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  85 repairing the insulated flange joint) must be done before CP can be applied effectively. In rare instances, replacement of a gasket is needed, which requires dewatering the pipeline. The continued biennial corrosion surveys will identify whether additional points of pipeline isolation will need to be added or restored.

Corrosion Surveys
The pipe-to-soil potential survey for each transmission pipeline will be performed every 2 years and will indicate whether the level of CP is adequate. The survey will also reveal whether field conditions have changed from the previous survey or whether CP interference is occurring in the field. The rectifiers are normally adjusted by changing the coarse and fine taps of the step-down transformer during the pipe -to-soil potential survey, to compensate for changes in the field conditions. After getting the existing CP systems back to an adequate corrosion protection level through the first three contracts, continued biennial corrosion surveys will be performed to determine how the system is working and what additional CP upgrades or repairs are needed.

Meter Improvement Program
RWS relies on numerous flow meters to manage day-to-day operations. Meter data are used for system hydraulics analysis, tracking daily and longer -term water use, and computing system water balances. Meter data are also used for financial purposes to support the computations for wholesale and retail water use, which directly affects cost allocations between these customer classes. The objective of the meter improvement program is to comply with contractual requirements, increase meter accuracy, increase reliability (reduce data dropouts), standardize installations, and lower maintenance costs by reducing emergency call-out repairs.

The meter improvement program implements calibration and maintenance requirements outlined in Appendix J of the 2018 WSA . The program focuses on more than 40 meters. For the FY21 and FY22 period, 98 calibrations were performed. RWS meters are generally organized into four categories: system input/ output meters, in -line meters, county -line meters, and terminal storage meters. These meters are discussed in significant detail, including their inventory, required maintenance, and calibration, in the 2018 WSA. All the meters are regularly calibrated through an independent metering consultant.

The San Francisco/San Mateo county-line meters are a priority of the program due to their role in wholesale revenue requirement cost allocation. Table 4-60 lists the FY21 and FY22 calibration summary of the county- line meters. The program ensures regularly scheduled calibrations and as a result has returned more consistent and reliable readings. During the 2-year period covered in this report (FY21 and FY22), all meters were found to be within the ±2 percent requirement of the 2018 WSA. By practice, whether or not a meter is found to exceed the calibration criteria, the independent meter consultant inspects the components, flushes lines, and conducts a repeat test on the same day. Maintenance of the meters includes regular cleaning and replacement of parts, as determined by the meter calibration consultant.

Each year, meter installations are evaluated for upgrades and improvement as part of the calibration routine. County -line meters are a priority, due to their role in wholesale revenue requirement cost allocation; consistent quarterly calibrations and maintenance ensure that meter equipment is upgraded as needed, thereby reducing the frequency of meter failure or poor performance. A summary of equipment replacement in FY21 and FY22 is presented in Table 4-61.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  86 Table 4-60: FY21 and FY22 County Line Calibration Summary Fiscal Year Date
Crystal Springs No. 1
Crystal Springs No. 2
San Andreas No. 2
San Andreas No. 3 **
Sunset Supply (LMPS)
Sutro Pipeline (LMPS)
Total Per
Quarter
FY-21
1st Quarter
July 2020
6 August 2020
September 2020      
2nd Quarter
October 2020 --
6 November 2020  -- 
December 2020 --    
3rd Quarter
January 2021 --  -- --
4 February 2021 -- -- --
March 2021 --  --   --
4th Quarter
April 2021  --  
8 May 2021  -- 
June 2021 --   
FY-22
1st Quarter
July 2020 --  -- -- -- --
1 August 2020 -- -- -- -- -- --
September 2020 -- -- -- -- -- --
2nd Quarter
October 2020      
12 November 2020   
December 2020   
3rd Quarter
January 2021
6 February 2021
March 2021      
4th Quarter
April 2021
6 May 2021     
June 2021 
Total Calibrations
For FY21 and FY20 8 8 9 8 8 8 49
Notes:
 = Calibrated
-- = Performed Next Quarter
FY = fiscal year
LMPS = Lake Merced Pump Station
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  87 Table 4-61: Summary of Meter Equipment Replacement, Installation, and Improvement FY Meter
D/P
Transmitter
and Related
Plumbing
Data
Logger
Pitot
Tap
New
Meter
Improve
Meter
Loop
Wiring
Improve
Instrument
and SCADA
Installation
FY22
Crystal Springs No. 2



LMPS Outfall Meter 

HTWTP Effluent 

Pulgas Valve Lot Meter 

Notes:

D/P = differential pressure
FY = fiscal year
HTWTP = Harry Tracy Water Treatment Plant
LMPS = Lake Merced Pump Station
SCADA = supervisory control and data acquisition
Regional Water System Water Balance Computation
Reliable and accurate meters are necessary to support customer billing and computation of the wholesale revenue requirement. Additional meters are used to compute the system water balance. The annually measured inflow into the water system has been within 1.7 percent and

2.3 percent of the out flow (outflow defined as sales to customers, including San Francisco) for FY20 and FY21, respectively . Results from FY22 are pending. Th ese results suggest that overall system losses are likely small. As a comparison, water losses reported by retail water systems in California averaged 9 percent for calendar year 2020.

As discussed in prior reports, the accurate measurement of spillage into Crystal Springs Reservoir is thought to be a primary point of measure for ensuri ng a positive water balance where input exceeds output. Over the last 6 years, consistent measurement of spillage into Crystal Springs has not completely eliminated the occurrence of output exceeding input; however, the frequency of such occurrences has decreased when compared with years past. F or example, output exceeded input once in the past 6 years (FY16 to FY21) compared to four times in the prior 6 years (FY10 to FY15). In reality, system losses are certainly nonzero, and inflow into the system in some years may be less than out outflow ; such occurrences may suggest some level of meter error in the calculation. Ongoing tracking of input versus output is an important means to gain insight into system meter performance.

Automated Meter Infrastructure
Advanced meter infrastructure ( AMI) meters have been in wide use at wholesale service connections for more than 5 year s. A smal l percentage of the wholesale service meters are not outfitted with AMI for reasons of either meter incompatibility or poor cellu lar service due to remote meter location. SFPUC’s regional AMI relies on cellular signal for data transmission.

AMI technology enables more immediate evaluation of usage and water balance analysis. AMI data, in combinations with ongoing meter calibrations and maintenance, ensures that potential Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  88 sources of data errors are found early on during a data dropout occurrence. Together, analyses of AMI and system meter data lessen the occurrence of potential errors and result in timely corrective actions, as needed.

The AMI program allows customers to log in to a protected webpage to view their own water usage and track water deliveries from SFPUC in n ear real time. In late 2017, SFPUC reti red the use of manual log books for recording wholesale customer billing meter reads and began using AMI-generated meter read reports for billing purposes. Meter reads by manual field observation remains a viable option for obtaining as-needed meter reads.

Late in FY22, the AMI service was interrupted due to changes in the cellular industry related to the move to 5G service. In response, SFPUC purc hased new 5G-compatible AMI transponders.

The existing non-5G transponders are being replaced. and this work is scheduled to be completed in fall 2022.

FY23 and FY24 Planned Work
In addition to replacing aging equipment, future projects include:
• installing new pitot taps at Irvington Meters 1 and 2; • improving instrumentation layout to prevent inundation at Calaveras Meter; • completing new AMI transponder installations;
• assessing SA2 meter instrument cabinets for replacement; • access improvements to the Sunset pitot taps;
• installing a new Venturi meter for the Alameda Creek Recapture Project; • new meter installation from Pulgas Channel outfall to UCSR; and • replacing two of the City of Hayward’s 16-inch turbine meters with 12-inch ultrasonic meters.

4.3.2.2 Asset Descriptions, Maintenance, and Condition
WSTD is responsible for the maintenance and operation of multiple water transmission assets that work as a system to transport water from the AEP to the county line of San Francisco. These assets include:

Alameda East Portal
Alameda Siphons
Calaveras Pipeline
San Antonio Pump Station
San Antonio Pipeline and San
Antonio Backup Pipeline
Pond F3 East
Alameda West Portal
Irvington Tunnel Nos. 1 and 2
Irvington Portal
Bay Division Pipeline Nos. 1,
2, and 5
Bay Division Pipeline Nos. 3
and 4
Intertie Pump Stations (East
Bay Municipal Utility
District and Valley Water)
Bay Tunnel
Stanford Tunnel
Pulgas Valve Lot
Pulgas Tunnel
Pulgas Pump Station
Pulgas Balancing Reservoir
Crystal Springs Bypass
Tunnel and Pipeline
Crystal Springs Pump
Station
Crystal Springs Pipelines
Nos. 1, 2, and 3
Sunset Supply Pipeline
Hillsborough Tunnel
San Andreas Pipelines Nos. 2
and 3
Capuchino Valve Lot
Baden Pump Station
Baden Valve Lot
San Pedro Valve Lot
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  89 SFPUC regularly performs internal pipeline inspections as part of maintenance to proactively find potential vulnerabilities in transmission pipelines before major problems occur. A combination of acoustic sounding (with ball peen hammer) and visual inspections i s performed for all pipelines. For PCCP, an additional electromagnetic test is performed by a specialized contractor to determine the number of broken prestressed wires. These methods have been used throughout the industry for more than 10 years and are considered tried-and-true methods.

There are a variety of pipeline types and sizes that require specific inspection techniques to detect defects and assess conditions particular to each pipeline. Each type of defect requires unique repair methods to restore the pipeline. Some defects are significant enough, or extensive enough, to warrant replacement or slip-lining.

Most inspections of pipelines use visual methods to detect defects . The most common category of pipeline is WSP , representing more th an half of the total length of transmission pipelines.

Riveted pipe, the oldest in the transmission system, also make s up a significant portion of the transmission pipelines. RCP is also inspected visually. It is a rigid pipe but has flexible joints, a unique feature. Steel “lockbar” pipeline develops defects similar to those of WSP. Both RCP and lockbar pipe make up a small portion of the transmission pipelines. A combination of sounding (with a ball peen hammer) and visual inspections is performed for all pipelines. For a pipeline that has access difficulties and/or is not feasible for shutdown, acoustic leak detection inspection has been used in the past while the pipeline is in service.

WSTD performs electromagnetic inspections and visual inspections for PCCP. There are 22 miles of PCCP in RWS still in operation . PCCP modes of failure usually have catastrophic consequences. The concrete cylinder could rupture without warning when there is loss of prestress wiring. Electromagnetic inspections estimate the number of prestress wire breaks (when intact, these wires provide most of the hoop strength).

Potentially explosive gas is present in many SFPUC tunnels and there are long stretches of tunnel without intermediate access. The care that must be taken to ensure safety under these conditions, including safe pipe isolation practices for confined space entry, make tunnel inspections particularly difficult.

WSTD has created a schedule for inspecting approximately 25 0 miles of pipeline. This schedule was created using a multi-step process based on a pipeline’s likelihood to fail, and the COF. This process emphasized public safety by prioritizing inspections for pipelines that have the highest chance of catastrophic failure and are near the public.

As pipelines a re taken out of service for construction and O&M activities, associated pipeline appurtenances must be operable to accommodate isolation, dewatering, and disinfection activities. Consequently, all related appurtenance valves, vaults, and drainage paths, and some line valves, are serviced on affected pipelines as required.

After pipelines have been inspected, the pipeline condition information from the inspection will be used to help make an informed decision when prioritizing capital improvements projects for each pipeline segment.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  90 Pipeline inspections that require entry in a dewatered pipeline were halted during the COVID-19 pandemic due to the poor ventilation in confined spaces. Pipeline maintenance inspections will resume in FY23.

Alameda East Portal
Description. AEP west of the CRT is in the hillside to the east of Calaveras Road. The Calaveras Fault Zone lies several hundred feet west of this location. The portal includes a 10.5-foot-diameter steel pipe with four pipe connections that distribute water to the four Alameda Siphons .

Additionally, the portal overflow shaft includes a catchment basin and an emergency overflow pipeline discharging to an adjacent quarry pit.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. AEP is in good condition and fi t for service. No deficiencies in condition were noted during this reporting cycle.

Alameda Siphons
Description. The Alameda Siphons include four pipelines ( AS-1 through AS-4) that stretch approximately 3,000 feet across the Sunol Valley , from the AEP to the AWP. The siphons were constructed from various materials between 1934 and 2011. All four pipelines cross the Calaveras Fault and Alameda Creek. Portions of AS-1 through AS -3 in the fault zone are susceptible to failing due to ground surface rupture. WSIP evaluated alternatives to bring AS-1 through AS-3 up to the latest seismic standards versus building a new siphon ; construction of a new siphon was determined to be the best alternative . AS-4, added under WSIP in 2011, has been designed with special provisions to allow it to withstand these seismic forces.

Water flowing through the siphons originates fr om Hetch Hetchy and/or the SVWTP. The characteristics of the two sources, primarily hardness and alkalinity, vary significantly. The siphons therefore include the mixing manifold, which is designed to blend the water from the two sources and to mix SVCF chemicals to provide water of uniform characteristics downstream.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Alameda Siphons ( AS-1 through AS -3) are in fair condition. AS-1 and AS -3 are expected to fail following a Magnitude 6.8 earthquake on the Calaveras Fault. AS-2 may survive the design earthquake, but will likely suffer ovalization. AS-4, the newest Alameda Siphon, built to withstand a M6.8 earthquake on the Calaveras Fault, is in good condition . Air Gap Nos. 1 and 3, which connect AS-3 with SAPL and SABPL, have shown signs of upward movement.

WSTD surveyors are regularly monitoring the movement. The Alameda Siphons are fit for service; however, the facilities may require capital investment to address pipeline movements at the air gaps at some point.

Calaveras Pipeline
Description. The Calaveras Pipeline extends approximately 6 mil es from the outlet tower of Calaveras Reservoir northward to the SAPS. The pipeline was initially constructed in 1965, with major upgrades in 1992. This WSP pipeline ranges in diameter from 44 to 78 inches. Portions of Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  91 the pipeline at Calaveras Dam was replaced as part of WSIP . The pipeline has four functions, which include:
• conveying water from Calaveras Reservoir to the SVWTP; • conveying water from Calaveras Reservoir to the Calaveras Creek discharge point; • conveying water from Calaveras Reservoir to San Antonio Reservoir by gravity; and • conveying water from either San Antonio Reservoir or Hetch Hetchy to SVWTP.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Calaveras Pipeline is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

San Antonio Pump Station
Description. SAPS was constructed in 1968 and subsequently modified in 1992 and 2011. The latest modifications under WSIP included the replacement of three of the 1,00 0-horsepower electrical pump casings, the addition of two 1.5 MW emergency generators, and the seismic retrofit of the building for life safety. In 2015, the Water CIP funded further upgrades at SAPS by replacing one of three diesel-driven motors with an electrically driven one, along with related upgrades. SAPS is integral to the operation of the facilities in the Sunol Valley and operates to transfer water between the various facilities, including the Alameda Siphons , San Antonio Reservoir, and SVWTP.

Maintenance. During this reporting cycle , control panel upgrades were completed on the diesel fuel day tank system to strengthen safety measures and prevent diesel fuel spills. Circuit breaker testing and repair were also completed. There is also a future project in de sign to replace components of the switchgear and MCC, improve the HVAC system, perform a seismic retrofit of the control room , and install a new 15 0-kilowatt propane standby generator . Smaller future R&R projects include inspection and, if necessary, internal recoating of the pump casings for the electric SAPS pumps; and providing a monitoring system for the permissive devices to facilitate pump alarm troubleshooting for the SAPS electric pumps.

Future projects under consideration include conversion of the remaining two diesel -driven pumps to electric pumps. Significant capital improvements even beyond what is scoped in the CIP will need to be considered for the Sunol Valley, due to the need for a pump station at that location, and due to the age of the current pump station (built in the 1960s). A new pump station inevitably needs additional power; coupled with the SVWTP ozone project, this may lead to upgrades to the Calaveras Substation and power modifications from HHWP , which currently powers the entire Sunol Valley. Furthermore, performance requirements would need to be revisited with two criteria in mind: (1 ) Calaveras Reservoir as a water source and (2 ) Hetch Hetchy aqueduct reliability to the Sunol Valley. A needs assessment will be initiated along with initial planning discussions. The most obvious considerations would be replacing the diesel pumps, overhauling the electrical system, and possibly relocating the pump station off the Calaveras Fault. Those items would be evaluated in context.

Condition. SAPS is in good condition and fit for service.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  92 San Antonio Pipeline and San Antonio Backup Pipeline
Description. The San Antonio Pipeline was constructed in 1967 to connect San Antonio Reservoir to SAPS and the Hetch Hetchy transmission system at the Alameda Siphons. The SABPL was constructed in 2013 under WSIP. SAPL extends from the Alameda Siphons and SAPS to the outlet structure in San Antonio Reservoir. SABPL exte nds from the Alameda Siphons to the surface mining permit (SMP) 24 Quarry Pond, also referred to as Pond F3 East.

SAPL and SABPL serve several very important purposes, including:
 transferring water from the CRT for storage or discharge;  transferring water from Calaveras Reservoir to San Antonio Reservoir to optimize storage in the two East Bay reservoirs;
 transferring water from San Antonio Reservoir to SVWTP, either by gravity or via pumping at SAPS, depending on system hydraulics;
 recapturing water discharged to Pond F3 East by transferring to San Antonio Reservoir; and  releasing water from the reservoir to San Antonio Creek.

SABPL provides SFPUC with greater flexibilit y in managing water quality while maintaining supply to customers through SVWTP. This function allows SFPUC to meet WSIP LOS goals and objectives during an unplanned outage of the Hetch Hetchy water supply.

Maintenance. Leak detection inspections were performe d for SAPL and SABPL in August 2021.

The inspections were carried out using Pure Technologies’ Sahara acoustic leak detection tool for the 60-inch SAPL and the 66-inch SABPL. No leak s were found. Pipe joints were inspected via closed-circuit television and we re found to be normal in appearance for the majority of the sections inspected.

Condition. SAPL and SABPL are in fair condition; however, ground fissures, 800 feet in length, had developed between the pipelines and an active mining quarry (SMP 30) operated by Oliver De Silva in the Sunol Valley. The ground fiss ures can lead to landslide and subsequently undermine SAPL and SABPL. To determine the cause of the ground fissures and support the geotechnical investigation, leak detection inspec tions were performed for both pipelines. SAPL and SABPL are fit for service; however, the fa cilities require capital investment to address geologic hazards through the Pipeline Inspection and Repair R&R Project.

Pond F3 East
Description. Pond F3 East is a facility that provides supplemental storage to discharge, recapture, and/or treat Hetch Hetchy water that does not meet primary and/or secondary drinking water standards. Under normal operation, Pond F3 East is used when the CRT has been out of service for an extended period (e.g., Hetch Hetchy shutdown) and needs to be flushed prior to returning Hetch Hetchy supply into RWS. Water captured in Pond F3 East is then pumped into San Antonio Reservoir or directly to SVWTP, where it can be treated for future use. The operating level of Pond F3 East is 195 to 240 feet and has a storage capacity of approximately 150 million gallons in this elevation range. The current pumping system was not designed to pump lower than 195 feet; however, contractor support has been used in th e past to pump below this elevation to create additional storage capacity based on operational needs and projections.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  93 Maintenance. In September 2020, construction started on a project to install staff gages on the Pond F3 East spillway to provide a visual indication of the pond’s water elevation ; replace handrails to improve employee safety at the site; and replace one of two submersible pumps that had failed. Additional work was performed to modify the pipe casing to p revent the new sled- mounted submersible pump and discharge hose from rotating while in operation. With the completion of the recent construction work, Pond F3 East will continue to operate in its current form, allowing for noncompliant water and water flushed from CRT after HHWP shutdowns to be recovered. The current operating protocol is to use one of the two submersible pumps to transfer water from Pond F3 East to San Antonio Reservoir.

Condition. Pond F3 East is in good condition. The performance and reliability of both pumps will be assessed; in the future, the remaining older submersible pump may be replaced to ensure adequate pumping redundancy.

Alameda West Portal
Description. AWP is on the western hillside of Calaveras Road. The Calaveras Fault Zone lies east of this location. The portal is where all four Alameda Siphons converge into Irvington Tunnel Nos. 1 and 2.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. AWP is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Irvington Tunnels Nos. 1 and 2
Description. There are two Irvington Tunnels; the original Irvington Tunnel No. 1 was constructed in 1934 and Irvington Tunnel No. 2 was completed in 2014 as part of WSIP. All of the water from Hetch Hetchy and SVWTP flows westward through these two tunnels, from the Sunol Valley to the BDPLs.

Irvington Tunnel No. 1 is 18,193 feet long and has a 10.5- foot inside diameter. The tunnel is completely lined with either concrete or gunite.

Irvington Tunnel No. 2 is slightly longer, with a length of 18,300 feet. This tunnel was excavated in a shape resembling a horseshoe, and finished with an 8. 5-foot-diameter WSP with cement mortar lining (CML).

Although Irvington Tunnel No. 2 was built as a redundancy to Irvington Tunnel No. 1, both tunnels are typically in service under normal operations.

Maintenance. Irvington Tunnel No. 2 was inspected in 2020, using an ASI Marine Falcon remotely operated vehicle (ROV). Visual and sonar data were collected as the tunnel was inspected from the AWP to the Irvington Portal. Review of the tunnel profiles generated from the collected sonar data did not reveal any anomalies in the tu nnel other than the sediment that was observed visually. Tunnels are inspected every 20 years.

Condition. Irvington Tunnel No. 1 and Irvington Tunnel No. 2 are in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  94 Irvington Portal
Description. Water from Hetch Hetchy and SVWTP is conveyed from the Sunol Region to the BDPLs through the parallel Irvington Tunnels Nos. 1 and 2. The Irvington Portal s provide the ability to isolate each tunnel on its downstream end, distribute water to the five BDPLs, and isolate each pipeline on its upstream end. SFPUC main tains a number of key water quality compliance points, including one at the Irvington Portals. RWS pH compliance is determined at the Irvington Portals. Other water quality parameters monitored at the Irvington Portals include pH, fluoride, free ammonia, total chlorine, and turbidity.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Irvington Portal is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Bay Division Pipeline Nos. 1, 2, and 5
Description. BDPL Nos. 1, 2, and 5 are aligned in a relatively direct line westward from the Irvington Portal s in Fremont to the Pulgas Valve Lot in Redwood City, a distance of approximately 21.5 miles. BDPL No. 1 was constructed in 1925; BDPL No. 2 in 1935/1936; and BDPL No. 5 in 2016 as part of WSIP, together with the new Bay Tunnel. With the new Bay Tunnel transmitting the combined flow from the three pipelines, the old BDPL Nos. 1 and 2 crossing the Bay have been decommissioned.

BDPL Nos. 1, 2, and 5 cross the Hayward Fault and therefore are especially susceptible to major seismic events on that fault.

The East Bay reach is approximately 37,600 feet (7.1 miles) in length. Seismically resistant crossings of the fault were constructed under WSIP. The initial (easternmost) 6,800 feet of BDPL No. 1 is constructed of 57- inch steel cylinder concrete pipe. The remainder is constructed of 60-inch riveted steel pipe. The first 6,800 feet of BDPL No. 2 is constructed of 62-inch steel cylinder concrete pipe and the remainder with 66-inch wrought steel pipe. BDPL No. 5 is constructed of 72-inch WSP.

The Peninsula reach is approximately 47,900 feet (9.06 miles) in length. BDPL No. 1 is constructed of 60-inch riveted steel pipe. BDPL No. 2 is constructed of a combination of 66-inch wrought steel pipe and 62-inch steel cylinder concrete pipe. BDPL No. 5 is constructed of 60-inch WSP.

Maintenance. A capital project was initiated to repair lining defects that were identified from previous inspections along BDPL Nos. 1, 2, 3, and 4, and to repair lining defects expected to be identified in future inspections. When this contract is in place, maintenance inspections and lining repairs can be performed within the same shutdown, eliminating the need for a second shutdown to perform repairs.

The scope of work primarily consists of removing corrosion accumulated at pipe joints from spalled CML, applying new cement mortar or dielectric lining, and cleaning debris and sediment found inside the pipe. During this reporting cycle , the Conceptual Engineering Report was finalized, and the project entered the design phase.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  95 Condition. BDPL Nos. 1, 2, and 5 are in good condition and fit for service; however, BDPL Nos. 1 and 2 require capital investment to address maintenance lining defects through the As-N eeded Pipeline Repair Project, as described in Section 4.3.2.3 of the CIP.

Bay Division Pipeline Nos. 3 and 4
Description. BDPL Nos. 3 and 4 proceed southward from the Irvington Portals, circling around the southern end of San Francisco B ay, through the northern part of San Jose and Santa Clara, and then northward to the Pulgas Valve Lot in Redwood City. This alignment differs significantly from that of BDPL Nos. 1, 2, and 5, providing increased reliability and the ability to efficiently serve the numerous wholesale customer turnouts. Each pipe line consists of approximately

33.9 miles in length. BDPL No. 3 was constructed in 1952, and BDPL No. 4 was constructed in 1967.

BDPL Nos. 3 and 4 also cross the Hayward Fault and therefore can be pa rticularly impacted by major seismic events on that fault. The diameters of the pipelines range from 72 to 96 inches, and the pipelines materials include steel -RCP, PCCP, and WSP. Before WSIP, the distance between crossover points on these two pipelines spanned approximately 8 miles. This large distance made it difficult to take segments of pipe out of service for planned inspections and maintenance. The BDPL Nos. 3 and 4 Crossovers P roject added three additional isolation/ crossover facilities, so that the distance between crossover points is approximately 4 miles. This makes the system easier to maintain and repair, and increases the number of customers that would likely receive water within 24 hours following a major seismic event. The three crossover facilities constructed under WSIP are near the Guadalupe River, Barron Creek, and Bear Gulch.

BDPL Nos. 3 and 4 cross the Hayward Fault near the intersection of Mission Boulevard and Interstate 680 (I-680). The maximum credibl e seismic event would have resulted in probable failure of both pipelines. For BDPL No. 3, a new 300- foot-long concrete vault with articulating sections was constructed under Mission Boulevard. The vault houses a section of 72- inch WSP, with ball joints an d slip joints that can accommodate pipeline displacement during a seismic event. BDPL No. 4 is designed to fail in a controlled manner that does not cause failure to BDPL No. 3. The seismic upgrade of BDPL Nos. 3 and 4 provides a seismically reliable conduit crossing the Hayward Fault.

BDPL Nos. 3 and 4 converge into the Stanford Tunnel. This tunnel is 810 feet long and 90 inches in diameter and is constructed of cement-lined and coated-steel pipe.

Maintenance. In response to Union Pacific Railroad’s plan to add a second track over BDPL Nos. 3 and 4 in Santa Clara, a R&R project was initiated to address pipe protection from loading of the second track system. The scope of work includes sliplining of 7 5 feet across the railroad’s ROW, adding new manholes to improve access, and making improvements to the appurtenances to meet current water quality standards. This project will begin construction in spring of 2023.

The PCCP segment of BDPL No. 4, between valves D60 and D70, had developed several leaks at the mid-Peninsula region. In 2017, an inspection found numerous circumferential cracks in the last 1.5 miles that parallel Edgewood Road in Redwood City. These cracks were mostly small, with only a few as wide as 0.125 inch. Although the circumferential cracks are not currently posing a structural risk, leaks have developed over time due to corrosion of the inner steel cylinder. This is believed to be a result of the circumferential cracks. In August 2020, an external Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  96 condition assessment was performed for certain pipe segments to verify the number of broken prestressed wire wra ps found in the 2017 inspection. That same assessment was performed to verify the accuracy of the electromagnetic method of determining wire breaks, with positive confirmation of accurate results.

In March 2021, BDPL No. 4 was shut down to repair leaks caused by the circumferential cracks.

WEKO-seals were installed to seal the leaks. Condition assessment findings and leaks confirmed that both the broken prestressed wires and circumferential cracks need to be addressed. In September 2021, another leak was found in the same stretch , immediately downstream of a previously repaired leak. S uspecting that new leaks may have been developing as the pipeline went through wet and dry cycles , staff decided against another pipeline shutdown. Staff implemented BMPs by diverting the leak to a nearby storm drain. It was noted that since its initial discovery, the leak has remained low and stable. The leak is being dechlorinated and monitored.

Condition. BDPL Nos. 3 and 4 are in fair condition. However, the PCCP a more com prehensive study of the segment between Valve D60 and D70 will needed to analyze the cause of failure and determine a methodology for mitigation. A capital project is currently underway that will investigate the root cause of the leaks and determine next steps.

BDPL Nos. 3 and 4 are fit for service. H owever, the PCCP segment requires active monitoring and capital investment to address both the broken prestressed wires and the circumferential cracks through the BDPL No. 4 PCCP Repair Project, as described in Section 4.3.2.3.

Intertie Pump Stations (East Bay Municipal Utility District and Valley Water) Description. SFPUC co -owns an intertie in Hayward with East Bay Municipal Utility District (EBMUD). The facility is operated by the City of Hayward in accordance with a Joint Exercise of Powers Agreement between SFPUC, City of Hayward, and EBMUD. SFPUC also co-owns an intertie with Valley Water in Milpitas. Each intertie offers the principal parties access to other regional water suppliers in emergencies or during planned maintenance of a critical facility. The EBMUD-SFPUC i ntertie was completed in 2007, and the SFPUC -Valley Water i ntertie was completed in 2000.

Maintenance. The City of Hayward is the designated lead for O&M at the EBMUD-SFPUC intertie.

SFPUC has had the lead maintenance role for the SFPUC-Valley Water intertie from 2000 to 2009 and as of January 2014. This role was passed on to Valley Water for 5 years while WSIP was under construction. SFPUC is in discussion with Valley Water regarding Valley Water be coming the designated lead for O&M at the SFPUC -Valley Water intertie. This change will require an amendment to the existing O&M agreement.

Condition. The EBMUD-SFPUC and SFPUC-Valley Water intertie pump stations are in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Bay Tunnel
Description. The Bay Tunnel was completed in 2014 as part of WSIP, to replace BDPL Nos. 1 and 2 and to transmit water across San Francisco Bay. The Bay Tunnel has a 9-foot-finished-diameter WSP with cement mo rtar lining. The tunnel is approximately 26,200 feet (4.96 miles) in length.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  97 The tunnel, which is 70 to 110 feet below sea level, extends from Newark Valve Lot and Tunnel Portal to the Ravenswood Valve Lot and Tunnel Portal.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Bay Tunnel is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Stanford Tunnel
Description. BDPL Nos. 3 and 4 converge at Stanford Tunnel Valve House East, travel for the 810-foot length of Stanford Tunnel , and diverge and continue on again as separate pipelines at Stanford Tunnel Valve House West. Stanford Tunnel was constructed in 1952. It is approximately 810 feet long and 7.5 feet in diameter. The entire length of the tunnel is lined with steel pipe.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Stanford Tunnel is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Pulgas Valve Lot
Description. The Pulgas Valve Lot, near the intersection of Edgewood and Crestview Roads in Redwood City, is the western terminus of the BDPLs. The purposes of this facility are to combine the flows from the five pipelines just upstream of the Pulgas Tunnel, maintain pressure in the upstream reach of pipe, provide isolation for the upstream reaches of pipe, and measure and totalize the flow rate for reporting purposes.

Maintenance. No PM was required or completed during this reporting cycle. Some upcoming minor improvements at the Pulgas V alve Lot include a project to p rovide standby generator running status signals and position of the automatic transfer switch to SCADA.

Condition. Pulgas Valve Lot is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Pulgas Tunnel
Description. The Pulgas Tunnel was constructed in 1924. Its original purpose was to transmit water from the BDPLs at the Pulgas Valve Lot to the Peninsula reservoirs. In 1969, the Crystal Springs Bypass System was constructed to enable water from the Pulgas Tunnel to be diverted northward directly to the low-pressure zone pipelines on the northern portion of the Peninsula.

The Pulgas Overflow Channel is the release point for excess water in RW S, discharging water from the tunnel to UCSR. It is also the first “daylight” point for Hetch Hetchy water downstream of the Moccasin Reservoir.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Pulgas Tunnel is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  98 Pulgas Pump Station
Description. The Pulgas Pump Station and Balancing Reservoir were constructed in 1975. The facilities function to dampen pressure fluctuations and maintain the hydraulic gradeline in the upstream Pulgas Tunnel and Crystal Springs Bypass Tunnel . The p ump station wetwell also serves as the diversion point for water to be released to the Peninsula reservoirs. The Pulgas Pump Station includes five large-capacity pumps that pump from the wet well into the Balancing Reservoir. The pump station also includes two flow-control valves that operate to allow reservoir water to flow back into the wetwell and subsequently the tunnel. The wetwell also includes two overflow weirs that allow water to flow either into the downstream Pulgas Dechloramination Facility before discharge to the UCSR, or directly to UCSR.

Maintenance. PM was performed on the pump starters and electrical switchgear equipment in 2021. In addition, reservoir cleaning was performed at the Pulgas Balancing Reservoir and will continue every few years.

Much of the facility has equipment dating back to the original construction. Proposed long-term improvements for the next few years include the replacement all of electrical switchgear and medium-voltage starters, replacement of the existing slide gate and knife gate valves, and replacement of the five vertical lift pumps.

Condition. Pulgas Pump Station is in fair condition and fit for service . H owever, the facility requires capital investment to address the aging equipment and deficiencies described above.

Pulgas Balancing Reservoir
Description. The Pulgas Balancing Reservoir was constructed in 1975. The Pulgas Balancing Reservoir is connected to the p ump station with a single 9 6-inch PCCP. The reservoir has a 60-million-gallon capacity, which can augment water supply in the Peninsula during peak demands.

Maintenance. Reservoir cleaning was initiated under contract by Liquivision Technology Diving Services in September of 2020 and completed by Underwater Resources, Inc., in March 2021.

Condition. Pulgas Balancing Reservoir is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Crystal Springs Bypass Tunnel and Pipeline
Description. The Crystal Springs Bypass Facilities, which include the Crystal Springs Bypass Tunnel, New Crystal Springs Bypass Tunnel, and Crystal Springs Bypass Pipeline, allow water to be transmitted by gravity directly to the low -pressure zone pipelines on the northern portion of the Peninsula, thereby bypassing the Peninsula r eservoirs and HTWTP. The Crystal Springs Bypass Tunnel and Pipeline were constructed and put into service in 1969. The New Crystal Springs Bypass Tunnel, constructed in 2011 under WSIP, is a continuation of the Crystal Springs Bypass Tunnel, providing redundancy to Crystal Springs Bypass Pipeline.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Crystal Springs Bypass Tunnel and Pipeline are in good condition and fit for service.

No deficiencies in condition were noted during this reporting cycle.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  99 Crystal Springs Pump Station
Description. CSPS and its associated valve lot are below LCSD. The primary purpose of these facilities is to transfer water from LCSR to San Andreas Reservoir approximately 4.5 miles north.

Because LCSR has a maximum water surface elevation of 28 8 feet, compared to 449 feet for San Andreas Reservoir, pumping is necessary to transfer water to San Andreas Reservoir. The pump station includes four large -capacity pumps that are used in transferring water between the reservoirs. Each of these pumps is 2,250 h orsepower and rated at 48 mgd. The maximum pump station capacity is 192 mgd. The water at San Andreas Reservoir is subsequently used to supply the HTWTP. CSPS was completely replaced in September 2014 as part of WSIP. The scope for the project included upgraded seismic performance, modern switchgear and starters, and variable - speed pumps. Collectively, the operational upgrades permit more off-peak pumping, which will lower power costs. By pumping during off -peak hours, SFPUC save s energy and reduces operating cost. The strategy is under consideration for use at other SFPUC facilities.

Maintenance. In FY21, warranty repair work was completed on two of four existing flow -control check valves that were showing premature wear and failure. In 2020, the UPS had also been replaced to improve the UPS reliability during utility power interruptions. Unfortunately, the newer UPS is experiencing reliability issues that have not been adequately addressed during the warranty period and will need replacement again.

Upcoming work includes a facility roof replacement project and replacement of the facility UPS.

In addition, PM on the electrical switchgear equipment is scheduled to be performed in FY23.

Condition. CSPS is in good condition and fit for service. The facility requires capital investment to address the maintenance deficiencies described above.

Crystal Springs Pipelines Nos. 1, 2, and 3
Description. CSPL Nos. 1, 2, and 3 transport Hetch Hetchy and/or Sunol water to customers along the Peninsula and to the potable water terminal storage reservoirs in the City of San Francisco.

CSPL No. 1 is currently not in service, except for a small, rehabilitated section. CSPL Nos. 2 and 3 both carry Hetch Hetchy water north to the City of San Francisco, across approximately 20 miles, by gravity. University Mound Reservoir is the terminus for CSPL Nos. 1, 2, and 3. The operating portions of CSPL No. 1 were replaced with 44-inch-diameter WSP in 1956. CSPL No. 2 ranges in diameter from 54 to 6 0 inches. C onstruction materials include WSP and riveted wrought iron with a sliplined WSP. CSPL No. 3 is a 60-inch PCCP.

Maintenance. CSPL No. 2, between valves K10 and K30, is a 60- inch welded steel pipeline with coal tar lining. Some of it traverses steep terrain with narrow access, making maintenance and repair difficult. An ongoing capital project will realign 1.5 mil es of the pipeline , replace the existing coal tar lining, add new manholes to improve access, and make improvements to the appurtenances to meet current water quality standards.

CSPL No. 2, between valves K40 and K50, is a 60-inch welded steel pipeline with coal tar lining.

An ongoing capital improvement project will replace the existing coal tar lining, add new in-line isolation valves to allow for greater operational flexibility, add new manholes to improve access, and improve appurtenances to meet current water quality standards.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  100 Condition. CSPL Nos. 1, 2, and 3 are in fair condition and fit for service. CSPL No. 3 was inspected in November 2017 and found to be in good condition. However, CSPL No. 2 requires capital investment to address lining and access deficiencies through the CSPL No. 2 Reaches 2 and 3 Rehabilitation Project and CSPL No. 2 Reach 5 Lining Replacement Project , as described in the CIP Section 4.3.2.3.

Sunset Supply Pipeline
Description. SSPL transports water from the Hetch Hetchy System north to the City of San Francisco, across approximately 20 miles, by gravity. The pipeline is 6 0 inches in diameter and constructed of WSP. SSPL delivers water to the Sunset Reservoir (“high zone”) after bein g pumped at the LMPS. Flow through the SSPL is controlled at several valves and valve lots along its alignment. The SSPL can also receive pressure-reduced high zone flow from the 60-inch Sunset Branch Pipeline via the Capuchino Pressure-Reducing Valve.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. SSPL is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Hillsborough Tunnel
Description. The Hillsborough Tunnel , collinear with the SSPL , was constructed in 1957. It is approximately 5,200 feet long and 7. 5 feet in diameter. The entire length of the tunnel is lined with steel pipe.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Hillsborough Tunnel is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

San Andreas Pipelines Nos. 2 and 3
Description. SAPL Nos. 2 and 3 are the primary high zone transmission lines for the SFPUC water system. From HTWTP , SAPL Nos. 2 and 3 parallel each other up to San Pedro Valve Lot and supply water to high zone service locations in the northern Peninsula and the C ity of S an Francisco. The terminus of SAPL No. 2 is at the Sunset Reservoir. With the extension of SAPL No. 3, constructed under WSIP, SAPL No. 3 terminates at the Merced Manor Reservoir. The completion of the Peninsula Pipelines Seismic Upgrade Project addressed seismic vulnerabilities along SAPL Nos. 2 and 3 and provided an operational work -around to ensure delivery of high - zone water to terminus reservoirs after a seismic event.

SAPL Nos. 2 and 3 are interconnected at both Baden Pump Station and San Pedro Valve Lot. At San Pedro, R60, a 42-inch butterfly valve , is throttled remotely from HTWTP to regulate high zone flow to San Francisco. SAPL No. 2 is made of 54-inch lockbar steel. SAPL No. 3 is made of 66-inch PCCP sliplined with steel , and a 36-inch steel extension from San Pedro Valve Lot to Merced Manor Reservoir.

Maintenance. SAPL No. 2 was replaced, between valves R12 and R20, in 2021. SAPL No. 2 was previously inspected in 2015 after a main break disrupted water delivery to the City of San Bruno.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  101 Four segments of SAPL No. 2 in San Bruno had deteriorated, with severe pitting and corrosion.

The capital project replaced approximately 6,500 linear feet of 54-inch-diameter lockbar steel pipe with WSP.

Condition. SAPL Nos. 2 and 3 are in fair condition. However, additional segments of lockbar steel in SAPL No. 2 are being considered for replacement due to concerns regarding corrosion. SAPL Nos. 2 and 3 are fit for service . H owever, SAPL No. 2 requires capital investment due to corrosion.

Capuchino Valve Lot
Description. The Capuchino Valve Lot is one of two valve lots designed to reduce pressure from the high- to low -pressure zone pipelines (the other p ressure-relief valve [ PRV] location is at Baden). The rated capacity of the facility is 80 mgd.

Maintenance. No PM was required or completed during this reporting cycle.

Condition. Capuchino Valve Lot is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Baden Pump Station
Description. The Baden Pump Station allows for the transfer of water from the low-pressure zone (SSPL and CSPL No. 2) into the high-pressure zone ( SAPL Nos. 2 and 3) to supplement water supply from HTWTP. The pump station includes three large pumps, each rated at approximately

16.5 mgd at 255 feet discharge head. The pumps are driven by 1,000-h orsepower, variable - frequency motors. Surge control vessels are provided on both the suction and discharge sides of the pump station.

Maintenance. Routine PM activities on the pumping system, compressors, backup generators, and other functions have maintained the operational reliability of the Baden Pump Station. There are no capital investments planned for this pump station at this time.

Condition. Baden Pump Station is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

Baden Valve Lot
Description. The Baden Valve Lot includes the interconnecting valves and pumps necessary to isolate pipeline reaches, transfer between the high-pressure and low-pressure zones, and transfer between pipelines of the same pressure zone.

The facility includes multiple interconnections between the tw o high -pressure service zone pipelines (SAPL No. 2 and SAPL No. 3) and between the four low-pressure service zone pipelines (SSPL, CSPL No. 2, CSPL No. 3, and SAPL No. 1). There is also a special energy -dissipating Monovar valve, part of the PRV station, that allows transfer of water from the high-pressure zone to the low-pressure zone.

Maintenance. No PM was required or completed during this reporting cycle.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  102 Condition. Baden Valve Lot is in good condition and fit for service. No deficiencies in condition were noted during this reporting cycle.

San Pedro Valve Lot
Description. The San Pedro Valve Lot includes the interconnecting valves necessary to isolate pipeline reaches, transfer between the high -pressure and low -pressure zones, and transfer between pipelines of the same pressure zone.

The facility includes multiple interconnections between the two high -pressure service zone pipelines ( SAPL No. 2 and SAPL No. 3) and between the low-pressure service zone pipeline (SSPL).

Maintenance. No PM was required or completed during this reporting cycle.

Condition. San Pedro Valve Lot is in good condition and fit for service. No deficiencies were noted during this reporting cycle.

4.3.2.3 Capital Improvements
Regional Water currently has 28 capital projects on its water transmission assets, representing a total capital investment of $202 million. Regional Water also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the eight active large capital projects are provided in the following sections.

As-Needed Pipeline Repair Project (Approved Budget: $7.72; Substantial Completion: 2028) Scope. This project will repair/replace regional pipeline segments that will be inspected over the next 5 years, in addition to any emergency repairs that may be needed. The initial construction contract period will be 3 years; combined with Project 10036840, BDPL Nos. 1 through 4 Lining Repair, it will provide a sufficient guaranteed scope. Subsequent construction contract(s) will be issued to parallel WSTD’s inspection program. The scope of work for the initial construction contract includes (1) pipeline replacement by open trench; (2) pipeline repair work; (3) protection of sensitive (wetland and creek) areas ; (4) protection of utilities and infrastructure ; (5) traffic control; (6) site/vegetation restoration; (7) paving restoration; and (8) dewatering and providing temporary safe entry measures to pipelines such as line stops, roll out spool pieces, blind flanging, and welding bulkheads. Any significant replacement needs will be addressed in subsequent expansions of this project or other independent projects.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-62.

Table 4-62: As-Needed Pipeline Repairs Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Conceptual Engineering Report June 30, 2021
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  103 Corrosion Control (Approved Budget: $36.5 Million; Substantial Completion: 2024) This project will implement the corrosion protection and control program recommended in the Corrosion Control Master Plan completed in August 2010. Sites identified with the worst levels of corrosion were bundled up in the master plan in three phases. Phase 1 construction work for 10 sites was completed and accepted on August 27, 2019. Phase 2 has 11 sites and is currently in the design phase. Phase 3 is anticipated to include work on as many as 20 sites.

Scope. The Corrosion Control Project includes three phases. Phase 1 was completed on August 27, 2019, and Phase 2 is currently in design phase for 11 sites. Work for Phase 2 includes (1) furnishing and installation of CP systems; (2) installation of rectifiers and anodes at a depth of approximately 300 feet; (3) installation of testing station s for pipelines ; (4) installation of specialized galvanic and impressed current CP systems; (5) installation of RMUs; and (6) installation of isolation protection systems.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-63.

Table 4-63: Corrosion Control (Phase II) Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
AAR January 4, 2017
Conceptual Engineering Report December 29, 2017
CEQA Categorical Exemption November 17, 2021
35% Design December 31, 2018
95% Design November 30, 2021
Notes:

AAR = Alternatives Analysis Report
CEQA = California Environmental Quality Act
San Antonio Pump Station Motor Control Center Upgrades Project (Approved Budget:
$12.5 Million; Substantial Completion: 2024)
Scope. SAPS is one of the key facilities in the Sunol Valley; it was constructed in 1965 and modified in 1990. Several components of the facility require replacement , upgrades, or seismic retrofits.

The work to be performed u nder this project w ill include (1) replacement of the existing diesel generator with a new 150-kilowatt propane generator; (2) installation of a new fire suppression system; (3) replacement of the existing lighting system ; (4) replacement of the existing HVAC system; ( 5) architectural design that accommodates clean agent fire suppression ; ( 6) seismic retrofit of walls; ( 7) replacement of the existing MCC; (8) replacement of the existing underground power and control conductors; (9) installation of new RTU with UPS ; and (10) replacement of existing communication system for Control and SCADA room.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-64.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  104 Table 4-64: San Antonio Pump Station Motor Control Center Upgrades Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
65% Design December 30, 2021
Note:

Conceptual Engineering Report not required for San Antonio Pump Station Motor Control Center San Andreas Pipeline No. 2 Replacement Project (Approved Budget: $45.6 Million; Substantial Completion: 2021)
Scope. SAPL No. 2 provides key water supply redundancy from the HTWTP to the Sunset Reservoir. The lockbar steel sections of SAPL No. 2 between the HTWTP and the Golden Gate National Cemetery were almost 90 years old, pitted, deteriorated, and in need of replacement.

The project is in post -construction, and work included (1) replacement of approximately 5,000 feet of 5 4-inch-diameter pipe with WSP by open trench ; (2) sliplining of approximately 1,500 feet of 5 4-inch-diameter p ipe with 4 2-inch-diameter WSP; (3) site restoration work ; (4) protection of utilities; (5) traffic control; and (6) pavement restoration work.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-65.

Table 4-65: San Andreas Pipeline No. 2 Replacement Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
GIR February 23, 2017
EIR April 12, 2017
GDR August 1, 2017
Design Criteria Report October 19, 2017
Bid Drawing and Specifications September 2018
Notice to Proceed April 9, 2019
Substantial Completion February 12, 2019
Final Completion July 26, 2021
Notes:

EIR = environmental impact report
GDR = Geotechnical Data Report
GIR = Geotechnical Investigation Report
BDPL Nos. 1 through 4 Lining Repair Project (Approved Budget: $10.7 Million; Substantial Completion: 2028)
Scope. This project will repair the lining in segments of BDPL Nos. 1 through 4 and other regional pipelines over the next 5 years. The duration of the Irvington Tunnel No. 2 construction contract for this project will be 3 years; combined with Project 10035029, As-Needed Pipeline Repair , it will provide a sufficient guaranteed scope. Subsequent construction contract(s) will be issued to Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  105 parallel WSTD’s inspection program. Work for this project includes (1) c ement CML repair, including removal, handling, and disposal of existing coal tar lining; (2) d ielectric lining repair; and (3) dewatering and provi sion of temporary safe entry measures, such as line stops, blind flanging, roll out spool pieces, and welding bulkheads.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-66.

Table 4-66: BDPL Nos. 1 through 4 Lining Repair Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Conceptual Engineering Report June 30, 2021
Note:

BDPL = Bay Division Pipeline
BDPL No. 4 PCCP Repair Project (Approved Budget: $54.75 Million; Substantial Completion:
2026)
Scope. In recent inspections of BDPL No. 4 Segment D, constructed of PCCP, a large number of wire breaks and circumferential cracks were found in the last 1.25 miles of pipeline that parallels Edgewood Road in Redwood City. In addition, several leaks have surfaced at circumferential cracks and where the pipeline transitions from PCCP to steel. The first construction contract will increase system reliability by rehabilitating approximately 650 feet of 8 4-inch-diameter BDPL No. 4 PCCP in Redwood City and will include (1) excavation, shoring, backfilling, and compaction; (2 ) demolition of PCCP; (3 ) replacement of approximately 530 feet of pipeline by open trench ; (4 ) sliplining of approximately 12 0 feet of pipeline ; (5 ) protection of sensitive (wetland and creek) areas and utilities/ infrastructure; (6) traffic control; and (7) site/vegetation and paving restoration.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-67.

Table 4-67: BDPL No. 4 PCCP Repair Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
PCCP Failure Risk Analysis Report August 15, 2022
Notes:

BDPL = Bay Division Pipeline
PCCP = prestressed concrete cylinder pipe
CSPL No. 2 Reach 5 Lining Replacement Project (Approved Budget: $23.7 Million; Substantial Completion: 2027)
Scope. CSPL No. 2 runs from CSPS to University Mound Reservoir. It delivers potable and emergency water supply to San Francisco and to several cities along the Peninsula. The 60-inch- diameter Reach 5 of CSPL No. 2, in the Cities of South San Francisco and San Bruno between Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  106 Millbrae Yard and Baden Pump Station, is more than 80 year s old and has extensive lining failures. This project includes (1) replacement of approximately 3.3 miles of coal tar lining with cement mortar or dielectric lining ; (2) upgrades for about 30 appurtenances to meet current standards; and (3) improvements to access and shutdown flexibility for maintenance by installing five manway structures and one 48-inch-diameter valve on SAPL No. 1 near Baden Pump Station.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-68.

Table 4-68: CSPL No. 2 Reach 5 Lining Replacement Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
AAR August 4, 2021
Notes:

AAR = Alternatives Analysis Report
CSPL = Crystal Springs Pipeline
CSPL No. 2 Reaches 2 and 3 Rehabilitation Project (Approved Budget: $82.81 Million; Substantial Completion: 2027)
Scope. CSPL No. 2 spans from CSPS to University Mound Reservoir. It delivers potable water supply to San Francisco and several cities along the Peninsula. Reaches 2 and 3 of CSPL No. 2 in the Town of Hillsborough, unincorporated areas of San Mateo County, the City of San Mateo, and the City of Burlingame are more than 80 years old and deteriorated in some locations; Reach 2 is on slopes that are eroding and Reach 3 has extensive lining failures. This project will include (1) realignment of Reach 2 to the existing abandoned CSPL No. 1 alignment, (2) replacement of the coal tar lining of Reach 3, and (3) improvement for access to the pipeline.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-69.

Table 4-69: CSPL No. 2 Reaches 2 and 3 Rehabilitation Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
AAR December 31, 2019
Conceptual Engineering Report Draft ~September 5, 2022
GIR ~August 31, 2022
Notes:

AAR = Alternatives Analysis Report
CSPL = Crystal Springs Pipeline
GIR = Geotechnical Investigation Report
Summary of Levels of Service Impacts
LOSs that are supported by the RWS water transmission capital improvements are provided in Table 4-70.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  107 Table 4-70: RWS Water Transmission Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
As-Needed Pipeline Repair
Project 
Corrosion Control 
SAPS MCC Upgrades
Project  
SAPL No. 2 Replacement
Project 
BDPL Nos. 1 through 4
Lining Repair Project  
BDPL No. 4 PCCP Repair
Project 
CSPL No. 2 Reach 5 Lining
Replacement Project  
CSPL No. 2 Reaches 2 and 3
Rehabilitation Project  
Notes:

BDPL = Bay Division Pipeline
CSPL = Crystal Springs Pipeline
MCC = motor control center
RWS = Regional Water System
SAPL = San Andreas Pipeline

4.4 Water Distribution Assets

4.4.1 Hetch Hetchy Water
HHWP owns and operates a network of water distribution assets that treat and distribute water to its upcountry offices, shops, and residences. These include:

Cherry Water Distribution System Early Intake Water Distribution System O’Shaughnessy Water Distribution System Moccasin Water Distribution System

4.4.1.1 Asset Descriptions, Maintenance, and Condition
Cherry Water Distribution System
Description. The Cherry Water Distribution System provides fresh drinking water to 10 to 20 SFPUC and United States Forest Service (USFS) employees and families working and living in the Cherry Compound, as well as visitors to two rental cottages in the compound. The system consists of two storage tanks; a Memcor filtration system ; and a water distribution system consisting of water lines, pipes, and valves of various sizes . Water is sourced from a small diversion dam on Cottonwood Creek.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  108 Maintenance. Table 4-71 summarizes maintenance work.

Table 4-71: Cherry Water Distribution System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Water Sampling Completed weekly Sampled for chemistry and bacterial agents Instrument
Verification and
Calibration
Completed weekly Instruments verified weekly
Completed monthly Instruments recalibrated monthly
Inspection Completed weekly Facility inspected by HHWP Stationary Engineer Surveillance and
Monitoring
Continuously monitored Plant monitored continuously via internal dataloggers
Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
Condition. Cherry Water Distribution System is in fair to good condition and fit for service; however, given the asset’s age, an updated condition assessment is recommended. A project to replace the Memcor Water Filter Plant has been initiated.

O’Shaughnessy Water Distribution System
Description. O’Shaughnessy Water Distribution System provides fresh drinking water to one to five SFPUC and National Park Service (NPS) employees and families working and living in the O’Shaughnessy Compound, as well as visitors to four rental cottages in the compound. The system consists of two storage tanks; a UV facility; and a water distribution system consisting of water lines, pipes , and valves of various sizes . Water is sourced directly from Hetch Hetchy Reservoir at O’Shaughnessy Dam.

Maintenance. Table 4-72 summarizes maintenance work.

Table 4-72: O’Shaughnessy Water Distribution System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Water Sampling Completed weekly Sampled for chemistry and bacterial agents Instrument
Verification and
Calibration
Completed weekly Instruments verified weekly
Completed monthly Instruments recalibrated monthly
Inspection Completed twice weekly Facility inspected by HHWP Stationary Engineer Surveillance and
Monitoring
Continuously monitored Plant monitored continuously via SCADA alarms Notes:

San Francisco Public Utilities Commission November 2022  109 Condition. O’Shaughnessy Water Distribution System is in fair to good condition and fit for service; however, given the age of the water distribution piping, an updated condition assessment is recommended.

Early Intake Water Distribution System
Description. The Early Intake Water Distribution System provides fresh drinking water to five to 15 SFPUC, NPS, and USFS employees and families working and living in the Early Intake Area; Kirkwood Powerhouse; and visitors to the Early Intake Bunkhouse. The system consists of two storage tanks; a UV facility; and a water distribution system consisting of water lines, pipes, and valves of various size s. Water is sourced from Hetch Hetchy Reservoir via Kirkwood Powerhouse.

Maintenance. Table 4-73 summarizes maintenance work.

Table 4-73: Early Intake Water Distribution System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Water sampling Completed weekly Sampled for chemistry and bacterial agents Instrument
Verification and
Calibration
Completed weekly Instruments verified weekly
Completed monthly Instruments recalibrated monthly
Inspection Completed thrice weekly Facility inspected by HHWP Stationary Engineer Surveillance and
Monitoring
Continuously monitored Plant monitored continuously via SCADA alarms Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Early Intake Water Distribution System is in fair to good condition and fit for service ; however, given the age of the water distribution piping, an updated condition assessment is recommended.

Moccasin Water Distribution System
Description. Moccasin Water Distribution System provides fresh drinking water to approximately 300 SFPUC employees and residents who work or reside in the town of Moccasin. The system consists of three storage tanks; a UV facility; and a water distribution system that consists of water lines, pipes , and valves of various size s. Water is sourced from Hetch Hetchy Reservoir via Moccasin Penstock.

Maintenance. Table 4-74 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  110 Table 4-74: Moccasin Water Distribution System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Water Sampling Completed daily Sampled for chemistry and bacterial agents Instrument
Verification and
Calibration
Completed weekly Instruments verified weekly
Completed monthly Instruments recalibrated monthly
Inspection Completed daily Facility inspected by HHWP Stationary Engineer Surveillance and
Monitoring
Continuously monitored Plant monitored continuously via SCADA alarms Notes:

HHWP = Hetch Hetchy Water and Power
PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. Moccasin Water Distribution System is in fair to good condition and fit for service ; however, given the age of the water distribution piping, an updated condition assessment is recommended.

4.4.1.2 Capital Improvements
There are no capital improvements for HHWP’s Water Distribution assets included in the current 10-year capital plan.

4.4.2 Regional Water
Beside the maintenance and operation s of the large -diameter transmission pipelines , Regional Water provides retail water service to a small number of individual residential and commercial customers outside of San Francisco. Retail operations in RWS are limited to distribution systems in Sunol.

4.4.2.1 Asset Descriptions, Maintenance, and Condition
Town of Sunol
Description. Sunol, with approximate population of 250 people, receives their potable and raw water from SFPUC via two 12-inch pipelines. These are the only sources of water into Sunol and cannot be shut down for a significant period of time.

The Sunol potable water pipeline is 1 2 inches in diameter and consists of transmission and distribution lines. The transmission line runs in the south-to-north direction, starts at the western end of the mixing chamber on the AWP, parallels Calaveras Road for the most part, crosses I-680, and ends at the Town of Sunol Pump Station in Sunol Yard. The 12-inch Sunol raw water pipeline is fed by the San Antonio Pipeline. It starts at Valve Y-35 (an isolation valve on the San Antonio Pipeline) and follows the same alignment as the potable pipeline that ends at Sunol Yard.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  111 The Sunol potable water distribution pipeline varies in size. Beginning at the Town of Sunol Pump Station, it runs uphill to feed two 120,000 -gallon storage tanks. The m ain pressure zone, which serves the majority of the population of Sunol, is gravity-fed, supplied by the tanks. The secondary pressure zone, along Kilkare Road in the upper elevation (north of the primary zone), requires the assistance of the Kilkare Booster Pump Station to service water through a 6-inch steel line to the residences in this zone.

The majority of the 1 2-inch Sunol potable and raw water pipelines were replaced with new mortar-lined ductile iron pipe in 2000 and 2013, from the AWP to Sunol Yard. A completed WSIP project, the Sunol Fire Suppression System Project (2016), upgraded segments of the distribution system and added a dedicated pipeline for firefighting purposes. A separate project completed by WSTD in 2017 added a dedicated fire pump to boost firefighting pressure to the secondary pressure zone. With the new Town of Sunol Fire Pump in place, both the primary and secondary pressure zones now have adequate firefighting volume and pressure.

Segments of the Sunol’s water system have been upgraded through a succession of projects in the past, but there are segments of pipeline from the original construction that are still operable today.

Maintenance. The 1 2-inch Sunol pipeline, which crosses Arroyo de la Laguna in Sunol, was originally installed below the creek bed. However, with erosion, the pipeline is now completely exposed. This section of the pipeline feeds both the potable and firefighting waterlines to Sunol.

A capital project has been initiated to replace the section of the pipeline crossing the creek.

A portion of the 1 2-inch Town of Sunol potable and raw waterl ines conflict s with Alameda County Transportation Commission’s (ACTC) project to widen I-680. A partial replacement would introduce a potential point of failure in Caltrans’ ROW . In consideration of this , SFPUC requested a complete replacement across the f reeway and funded a portion of the replacement outside of ACTC’s work limit. The construction for the replacement section began in 2021.

In November 2021, two leaks were reported on the Town of Sunol 1 2-inch raw water line. The leaks occurred in the construction site of ACTC’s project to widen I-680. The leaks, caused by corrosion, were repaired with leak clamps. To minimize point loads, ACTC has since installed steel plates over the 12-inch potable and raw waterlines. The corroded sections of the 12-inch raw waterline will be replaced at the end of ACTC’s project.

Condition. Sunol potable and raw waterlines are in good condition and fit for service. H owever, the facilities require capital investment to replace the segments across the creek and I-680 through the Town of Sunol Pipeline Improvement Project, as described in Section 4.4.2.2.

4.4.2.2 Capital Improvements
Regional Water currently has one active capital project on its water distribution assets, representing a total capital investment of $6.66 million.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  112 Town of Sunol Pipeline Improvement Project (Approved Budget: $6.66 Million; Substantial Completion: 2025)
Scope. Since the Year 2000, SFPUC has replaced all but two segments of the Town of Sunol pipeline system through the Town of Sunol Fire Suppression project. This project will complete the replacement of the last two segments, replacing sections of the pipeline that cross the Arroyo de Laguna Creek (Creek Crossing) and under I-680. The upstream section of pipeline, which feeds both the potable line and fire suppression line to Sunol, is exposed under the creek and in danger of failing under I-680. Pipeline failure at either location has significant consequences because all fire and potable water in Sunol is dependent on the rehabilitation of this 12-inch line. This project will reduce unplanned outages from pipe breaks and improve on delivery reliability.

This project is broken up into two portions . The scope of work is summarized in the following paragraphs.

Creek Crossing
• Replace approximately 550 feet of 12 -inch-diameter pipeline crossing Arroyo de Laguna Creek with 12-inch-diameter Ductile Iron Pipe (DIP), class 53 • Open-cut trench across the creek
• New tie-in points with gate valves
• Creek restoration and tree removal in pipeline alignment I-680 Crossing
• MOU agreement with Alameda County Transportation Commission (ACTC) to replace existing 12-inch-diameter Town of Sunol pipelines under I-680 for $1.3 million Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-75.

Table 4-75: Town of Sunol Pipeline Improvement Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
AAR November 2017
Conceptual Engineering Report November 2021
Note:

AAR = Alternatives Analysis Report

4.5 Buildings and Grounds
SFPUC owns and operates multiple buildings and grounds facilities that are spread over a large geographical area to support the O&M of RWS.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  113

4.5.1 Hetch Hetchy Water
HHWP is responsible for the O&M of multiple buildings and grounds assets throughout its operational territory. Staff-assigned reporting facilities include:

Moccasin Compound
South Fork Yard
Oakdale Yard
Warnerville Yard
In addition to the above -listed facilities, HHWP also operates and maintains smaller-scale buildings and grounds facilities at Eleanor, Cherry, O’Shaughnessy, Early Intake, and Rock River.

4.5.1.1 Asset Descriptions, Maintenance, and Condition
Moccasin Compound
Description. Moccasin Compound is the main corporate yard for HHW P. The Administration Building is occupied by HHWP’s Management, Engineering, Business Services, Water and Power Operations, Asset Management Services , Strategic Capital Planning and Special Projects, and Power Compliance groups. All groups at the compound are housed in either the administration facility, building, shop, or trailers. Staff support for the larger working groups are discussed in the following paragraphs.
• Engineering staff: Operating groups include Maintenance Engineering, Renewal and Replacement Projects, and Information Technology (IT) Services. Maintenance Engineering comprises the civil, mechanical, and electrical disciplines, including drafting and surveying support. IT Services includes operating technology, IT, and SCADA staff. • Business Services: Operating groups include Budget and Finance for Operating and Capital; Contracts; Records; Property Management; Personnel, Training , and Recruitment ; and Materials Procurement and Management.
• Water and Power Operations: S taff include s p ower system operators ( who also perform dispatch); power transmission system east linemen, who maintain overhead electrical lines from O’Shaughnessy to Don Pedro Reservoir; operation transmission planning engineers; water and p ower planning staff; w atershed management staff ; p lumbers shop staff ; equipment maintenance shop staff; carpenter shop staff; electrical shop staff; paint shop staff; tech shop staff; ROW crew for the area from Priest Watershed to Newark ; and vegetation management crew for the entire project area.
• Asset Management Services: Staff includes planners, schedulers, and asset services. Security is also included in this work team.

In addition to HHWP staff, multiple trailers house infrastructure teams, water quality staff and labs, and NRLMD staff who support HHWP maintenance and programs.

Maintenance. Table 4-76 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  114 Table 4-76: Moccasin Compound Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed monthly Security inspection
Completed monthly Safety inspection
Completed monthly Spill prevention control and countermeasures Completed annually Facility fire suppression testing
Maintenance Completed monthly Backup generator maintenance Completed annually Defensible space vegetation clearing Completed every 3 years Domestic water tanks maintenance Note:

PM = preventive maintenance
Condition. There are many offices and storage facilities in Moccasin Compound. The condition of these facilities varies greatly; the use of some buildings is limited due to their condition (e.g., the Old Moccasin Powerhouse). Needs continue to be addressed and capital projects identified.

South Fork Yard
Description. South Fork Yard is east of the town of Groveland. The yard is occupied by the South Fork ROW maintenance crew. This crew maintains HHWP facilities from O’Shaughnessy to the eastern side of the Priest Reservoir watershed.

Maintenance. Table 4-77 summarizes maintenance work.

Table 4-77: South Fork Yard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed monthly Security inspection
Completed monthly Safety inspection
Completed monthly Spill prevention control and countermeasures Completed bi-annually Facility fire suppression testing Maintenance Completed annually Defensible space vegetation clearing Note:

PM = preventive maintenance
Condition: The South Fork Yard is fit for service.

Oakdale Yard
Description. Warnerville Compound is east of the city of Oakdale. The yard is occupied by maintenance engineering staff dedicated to the HHWP facilities west of Don Pedro Reservoir.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  115 Maintenance. Table 4-78 summarizes maintenance work.

Table 4-78: Oakdale Yard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed monthly Security inspection
Completed monthly Safety inspection
Completed monthly Spill prevention control and countermeasures Maintenance Completed annually Defensible space vegetation clearing Note:

PM = preventive maintenance
Condition: The Oakdale Yard is fit for service.

Warnerville Yard
Description. Warnerville Compound is east of the city of Oakdale. The yard is occupied by power transmission system west l inemen who maintain overhead electrical lines from Don Pedro Reservoir to Newark. It should be noted that the power transmission system west linemen also support maintenance of overhead electrical lines owned by WSTD.

Maintenance. Table 4-79 summarizes maintenance work.

Table 4-79: Warnerville Yard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed monthly Security inspection
Completed monthly Safety inspection
Completed monthly Spill prevention control and countermeasures Completed bi-annually Facility fire suppression testing Maintenance Completed annually Defensible space vegetation clearing Note:

PM = preventive maintenance
Condition The Warnerville Yard is fit for service.

4.5.1.2 Capital Improvements
HHWP currently has two active capital projects on its buildings and grounds assets, representing a total capital investment of $13.7 million. HHWP also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the active large capital projects are provided in the following sections.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  116 Moccasin Old Powerhouse Hazard Mitigation (Approved Budget $12.2 Million; Substantial Completion: 2024)
Scope. The scope for this project is to design and install mitigation measures to prevent the building from collapsing due to multiple structural and nonstructural issues, and to prevent hazardous materials (such as lead -based paint and asbestos) from contaminating the water in Moccasin Reservoir.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-80.

Table 4-80: Moccasin Old Powerhouse Hazard Mitigation Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
NAR February 2022
Note:

NAR = Needs Assessment Report
Moccasin Engineering and Records Building (Approved Budget $1.5 Million; Substantial Completion: Not Applicable)
Scope. The scope for this project is to complete an AAR and Conceptual Engineering Report to support the objective of the design and construction of a 25,000 -square-foot building. The building will provide adequate office space for current staff in Moccasin, as well as a new records and archives space with offices; a new space for servers currently stored in the basement of the existing Administration Building; and increased parking space for staff.

Milestones Completed During the Reporting Cycle. The project is scheduled and budgeted to begin in 2023; therefore, no milestones were achieved during this reporting cycle.

Summary of Levels of Service Impacts
LOSs that are supported by the HHWP buildings and grounds assets capital improvements are provided in Table 4-81.

Table 4-81: HHWP Buildings and Grounds Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
Moccasin Old
Powerhouse Hazard
Mitigation
 
Moccasin Engineering
and Records Building 
Note:

HHWP = Hetch Hetchy Water and Power
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  117

4.5.2 Regional Water
WSTD owns and operates multiple buildings and grounds facilities , spread over a large geographical area, that support the O&M of RWS.

4.5.2.1 Asset Descriptions, Maintenance, and Condition
Sunol Yard
Description. Sunol Yard is a newly built East B ay corporation yard. It has an Administration Building occupied by WSTD and NRLMD; the rest of the yard is shared by utility plumbers, electricians, electronic maintenance technicians, and the auto , welding, painting, and buildings and grounds shops. It is also the opera tional hub for East Bay gardeners, carpenters, house plumbers, custodians, and stationary engineers. Sunol Yard is surrounded by the Water Temple, the new Alameda Creek Watershed Center, the Sunol Native Plant Nursery, and the shared Hetch Hetchy Yard used for storage.

Maintenance. Between July 1, 2020, and June 30, 2022, WSTD performed PM on the newly built yard Sunol Yard. R&R projects for the paint/ blast booths, emergency generator, vehicle wash, and main entrance and exit gates will be addressed in FY23 and FY24.

Condition. The Sunol Yard is in very good condition.

Millbrae Yard
Description. Millbrae Yard is the main corporate yard for WSTD. The Administration Building is occupied by WSTD m anagement; e ngineering; administration; w ater treatment; distribution operations; maintenance; 24- hour dispatch; p lanners; IT; and water quality labs, offices, and cubicles. There is a warehouse for supplies, auto shop, gardener shop, carpenter shop, electrician shop, house plumber shop, welding shop, paint shop, and a utility plumbers shop. NRLMD has a cottage and a trailer.

Maintenance. WSTD performed PM between July 1, 2020, and June 30, 2022. The Administration Building was built in the late 1960s, and its mechanical equipment is nearing the end of its useful life. Both the yard security upgrade and building HVAC system repairs will begin in FY23.

Condition. The Millbrae Yard buildings are aging but in fair condition.

Rollins Road
Description. Rollins Road is the administrative headquarters for the WQD. This facility is occupied by the WQD Administration, Engineering, and Field Services sections, as well a variety of NRLMD staff (planners, biologists, etc.), and WSTD surveyors. In addition to office space and cubicles, the facility serves i s the operational hub of the sample monitoring group, storing cars and field monitoring equipment.

Maintenance. WSTD and various vendors performed preventive and as-needed maintenance for this facility between July 1, 2020, and June 30, 2022. This facility, which was previously leased, was purchased in 2017. In FY22, a security upgrade was started to add fencing and access control; Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  118 this upgrade should be completed in early FY 23. Also in FY23, minor renovations will be conducted to increase the number of work spaces for staff, and two HVAC units will be replaced.

The roof was patched in places over the garage and the southwest portion of the facility.

Additionally, an often-failing HVAC unit dedicated to the server room required repairs several times. Ongoing efforts to improve employee safety included the purchase and installation of portable air cleaners for use in common areas in which social distancing cannot be maintained.

Planned upgrades to the Millbrae Corporation Yard include space into which Rollins Road staff may eventually relocate. Such plans have balanced management decisions between short- term remedies and major investments in this facility.

Condition. Rollins Road building is aging but in fair condition.

4.5.2.2 Capital Improvements
Regional Water currently has 10 active capital projects on its buildings and grounds assets, representing a total capital investment of $191.6 million. Regional Water also has multiple R&R projects that are smaller in scope and budget, and are reported annually. Summaries for each of the active large capital projects are provided in the following sections.

Rollins Road Building Renovation (Approved Budget: $5.2 Million; Substantial Completion:
2021)
Scope. SFPUC purchased a property on Rollins Road in September 2017, securing an additional 10,000 square feet of office space for the SFPUC WE . In June 2020, the project scope for 1657 Rollins Road was decreased significantly, and the scope of the Millbrae Yard Lab and Shop Project was increased. The program for Rollins Road Building Renovation Project will be achieved at the Millbrae Yard by adding two additional floors to the laboratory building as part of its Phase 1 project. The expanded laboratory building will accommodate the Rollins Road building staff. As a result of the scope change, personnel at 1657 R ollins Road will relocate to Millbrae Yard campus following the completion of the Millbrae Yard Lab and Shops Project. The project at 1657 R ollins Road will implement exterior security improvements, including (1) 800 linear feet of 8-foot-high chain link fencing; (2) three pedestrian and two vehicular gates with card readers; (3) new security lighting for the parking lot west of the building; (4) electrical work to support new exterior lighting and security infrastructure; (5) eight exterior and three interior security cameras; and (6) integration of new security devices with existing Galaxy and Milestone software.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-82.

Table 4-82: Rollins Road Building Renovation Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Environmental Approval October 30, 2020
Construction Notice to Proceed December 8, 2020
Substantial Completion October 20, 2021
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  119 Millbrae Warehouse Settlement and Administration Building HVAC (Approved Budget:
$16.1 Million; Substantial Completion Scope I: 2021; Substantial Completion Scope II: 2023) This project will cover the cost of construction repairs for two buildings—the Millbrae Warehouse and the Administration Building—in the Millbrae Yard facility.

Scope I. For the Millbrae Warehouse Settlement project, a long-term fix will be provided for the displacement (settlement) of the slab between the loading dock and the offices. The slab settlement resulted from expansive clay layers 7 feet below the top of the existing concrete slab.

The scope of work for Millbrae Warehouse Settlement includes (1) replacement of soil below the existing loading dock with drainage gravel and aggregate base; (2) installation of a drain for the existing eyewash shower; (3) replacement of the existing slab with a new loading dock slab and retaining wall; (4) modification of downspouts to discharge the water away from the loading dock retaining wall and warehouse ; and (5) installation of weep holes along the bottoms of retaining walls; and (6) installation of appurtenances.

Scope II. For the Millbrae Administration Building HVAC upgrades, this project will provide a long-term reliable and economical solution to heating and cooling demands. The scope of work for Millbrae Administration Building HVAC upgrades includes (1) removal of the outdated main HVAC units from the mezzanine level; (2) placement of the main components of the new HVAC system outside of the building; (3) installation of the duct work system through the existing louver openings; and (4) leasing of the mobile laboratory trailer during construction.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-83.

Table 4-83: Millbrae Warehouse Settlement and Administration Building HVAC Project Milestones Completed During the Current Reporting Cycle Milestone Date Complete
Scope I: Environmental Approval (CatEx) August 31, 2020 Scope I: Bid Advertisement September 1, 2020
Scope I: Construction Notice to Proceed June 16, 2021
Scope I: Final Completion November 24, 2021
Scope II: No Substantial Modification to CatEx January 12, 2022 Notes:

CatEx = categorical exclusion
HVAC = heating, ventilation, and air conditioning
Millbrae Yard Laboratory and Shop Improvements (Approved Budget: $169.6 Million; Substantial Completion: 2028)
The Millbrae Yard campus improvements will be implemented in three phases. Phase 1 includes a new laboratory and new south shop building to alleviate WE’s undersized and outdated work spaces and desire to relocate mission-critical functions to code-compliant structures. This project will provide additional space in the laboratory building by constructing two additional floors to accommodate the relocation of all personnel from the Rollins Road Facility. Phase 2 includes Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  120 demolition of the existing Administration Building and construction of a new consolidated Administration Building adjacent to the new laboratory building to accommodate other WE staff.

Phase 3 includes construction of new covered storage for materials and equipment. Only the scope of work for Phase 1 will be implemented under this project , to meet near -term needs, minimize disruptions to operations, and allow gradual buildout of the master plan to stay within the 10-year CIP budget.

Scope. The Millbrae Yard campus improvements will be implemented in three phases. Phase 1 includes a new laboratory and new south shop building; Phase 2 includes demolition of the existing Administration Building and construction of a new consolidated Administration Building; Phase 3 includes construction of new covered storage for materials and equipment. This project includes planning for all three phases, but only design and construction for Phase 1. Work for Phase I includes (1) construction of a new 50,000-square-foot, three-story laboratory building; (2) construction of a new 12,800-square- foot shop building; (3) renovation of an existing 7,440-square-foot warehouse; and (4) performance of site improvements such as driveways, hardscape, landscape, and parking (approximately 400 spaces).

Milestones Completed During the Reporting Cycle . No milestones were achieved by the project during this reporting cycle, but project planning continues to progress.

Table 4-84: Millbrae Yard Laboratory and Shop Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Project planning in progress Pending
Sunol Long-Term Improvements (Approved Budget: $104.9 Million; Substantial Completion Scope I: 2020; Scope II: 2021)
Scope. The project includes redevelopment of the existing Sunol Yard (Scope I) and construction of a Watershed Center (Scope II) near the Sunol Water Temple. The Sunol Yard construction work was completed on September 4, 2020. Work for Watershed Center includes (1) construction of a one-story LEED Gold facility that will include an interpretive display exhibit area, a freshwater stream profile aquarium, history display alcoves, a watershed discovery lab classroom, a community multi -purpose room, restrooms, an entry plaza, a reception area, patios, and administrative offices; (2) construction of a 2.5- acre d iscovery trail area with native plant landscaping, irrigation, meandering trails, seating areas, and water and landscape features ; (3) site restoration of the temple area forecourt ; (4) construction of new stairs and ramps to the picnic area; (5) installation of underground utilities; and (6) site restoration and paving.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-85.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  121 Table 4-85: Sunol Long-Term Improvements Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Scope I: Final Completion September 15, 2020
Scope II: Substantial Completion December 16, 2021

Summary of Levels of Service Impacts
LOSs that are supported by the RWS buildings and grounds capital improvements are provided in Table 4-86.

Table 4-86: RWS Buildings and Grounds Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
Rollins Road Building
Renovation 
Millbrae Warehouse
Settlement and
Administration Bldg.

HVAC

Millbrae Yard
Laboratory and Shop
Improvements

Sunol Long-Term
Improvements   
Notes:

HVAC = heating, ventilation, and air conditioning
RWS = Regional Water System

4.6 Power Generation Assets
SFPUC owns and operates multiple power generation assets, including high-head and low-head hydropower houses. These assets are all operated and maintained within the Hetch Hetchy Water system.

4.6.1 Hetch Hetchy Water
HHWP is responsible for the maintenance and operation of multiple power generation assets, most of which are integral to its water delivery system. These assets include:

Holm Powerhouse Moccasin Powerhouse
Kirkwood Powerhouse Moccasin Low Head Powerhouse
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  122

4.6.1.1 Asset Descriptions, Maintenance, and Condition
Asset descriptions, maintenance, and condition for the HHWP p ower generation assets are provided in the following sections, organized from upstream to downstream. A summary of the assets organized by classification is included in Table A-12 of Appendix A.

Holm Powerhouse
Description. Holm Powerhouse has two generating units, with a combined maximum output of 171 MW at a maximum flow of 1,010 cfs. The distributor floor, turbine floor, and generator floor are inside the powerhouse. The turbines are vertical, impulse type, with six jets and deflectors directing water to the exposed, nonsubmerged, runner. The turbine discharges into an open waterway that daylights into the tailrace area and into Cherry Creek.

Each generating unit has three single-phase, 230: 13.8-kilovolt (kV) step-up transformers installed outdoors on the transformer deck adjacent to the generator floor. The transformers are connected to the indoor 13.8 kV switchgear and the Early Intake Switchyard. Holm Powerhouse is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-87 summarizes maintenance work.

Table 4-87: Holm Powerhouse Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Operator walkthroughs
Completed monthly Security inspections
Completed annually Annual vegetation inspection
Maintenance Completed annually Annual maintenance shutdown for generating units 1 and 2
Note:

PM = preventive maintenance
Condition. Holm Powerhouse and its systems are in good condition. Many of the plant’s auxiliary systems and controls were recently replaced and/or updated during the HH -989 Contract. The generators each have had a rewind project to refurbish and extend their useful life. The generator step-up transformers are in good condition and should be monitored for condition and performance. The turbine shut-off valve (TSOV) for each unit is in only fair condition due to its age; this has required HHWP to increase its nonroutine maintenance activities.

Kirkwood Powerhouse
Description. Kirkwood Powerhouse has three generating units, with a combined maximum output of 126 MW at a maximum flow of 1,350 cfs. The distributor floor, turbine floor, generator floor, and control room are inside the powerhouse. The turbines are vertical, impulse-type, with six jets and deflectors directing water to the exposed, nonsubmerged, runner. The turbine discharges into an enclosed waterway connecting to Early Intake Bypass Tunnel.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  123 Each generating unit has three single-phase, 230:13.8 kV step-up transformers installed outdoors on the transformer deck adjacent to the generator floor. The transformers are connected to the indoor 13.8 kV switchgear and Early Intake Switchyard.

Kirkwood Powerhouse has a water bypass and energy dissipation system used to convey water from the penstock to the bypass chamber and onto Mountain T unnel. Kirkwood Powerhouse is in a Tier 2 High Fire Threat District
Maintenance. Table 4-88 summarizes maintenance work.

Table 4-88: Kirkwood Powerhouse Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Operator walkthroughs
Completed monthly Security inspections
Completed annually Annual vegetation inspection
Maintenance Completed annually Annual maintenance shutdown for generating units 1, 2, and 3
Note:

PM = preventive
Condition. Kirkwood Powerhouse and its systems are in marginal condition. Some systems have been updated, due to the overall age of the powerhouse and because associated systems may have reached the end of their useful life. In 2009-2010, a generator rewind performed on units 1 and 2, which are still within their expected useful life. Capital investment will be required to update and overhaul unit 3 and the plant auxiliaries. Additionally, the water bypass and energy dissipation system is in poor condition; it has required extensive repairs over the past 10 year s, with limited use. Capital investment will be required to upgrade or replace the system for long - term, reliable service.

Moccasin Powerhouse
Description. Moccasin Powerhouse has two generating units, with a combined maximum output of 110 MW at a maximum flow of 1,340 cfs. The distributor floor, turbine floor, and control room are inside the powerhouse, with the generator housing exposed to the outdoors. The turbines are impulse-type, with six jets and deflectors directing the water to the exposed, nonsubmerged runner. The turbine discharges into an open waterway, which daylights into the tailrace area.

The 115/230:13.8 kV step-up transformers are just outside the powerhouse. The transformers are connected to the indoor switchgear and the Moccasin Switchyard adjacent to the powerhouse.

Moccasin Powerhouse has two water bypass and energy dissipation systems used to convey water from the penstocks to the tailrace when generation units are not available. Moccasin Powerhouse is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-89 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  124 Table 4-89: Moccasin Powerhouse Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Operator walkthroughs
Completed monthly Security inspections
Completed annually Annual vegetation inspection
Maintenance Completed annually Annual maintenance shutdown for generating units 1 and 2 Note:

PM = preventive maintenance
Condition. Moccasin Powerhouse and its systems are in marginal condition. Due to the overall age of the powerhouse and associated systems, many have reached the end of their useful life. There are ongoing capital projects to upgrade and refurbish the generators, generator step -up transformers, and plant auxiliary systems. The TSOV is in marginal condition and has required extensive nonroutine maintenance. Capital investment will be required to refurbish and increase reliable performance of the TSOV. Additionally, the water bypass and energy dissipation systems are in poor condition. There is an ongoing capital project to update and replace these systems.

Moccasin Low Head Powerhouse
Description. Moccasin Low Head Powerhouse has one horizontal unit with a generator rated at 3,750 kVa. The turbine is a Francis type that discharges into a draft tube connected to the tailrace.

The powerhouse has three levels: the mezzanine, turbine floor, and generator pit.

The generator has a three-phase 13.8:4.16 kV step-up transformer outside near the powerhouse.

The transformer is connected to the indoor 4.16 kV breaker and the Moccasin Switchyard .

Moccasin Low Head Powerhouse is in a Tier 2 High Fire Threat District.

Maintenance. No PM was required or completed during this period.

Condition. Moccasin Low Head Powerhouse is in p oor condition due to the age of the systems and damage incurred during the March 2018 flood. A pr oject is underway to remediate the damage and have the powerhouse operational by spring 2023. Additional capital investment may be required at a later date to modernize the powerhouse systems for reliable operations.

4.6.1.2 Capital Improvements
HHWP currently has four active capital projects on its power generation assets, representing a total capital investment of $118.6 million. HHWP also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the se active large capital projects are provided in the following sections.

Other Powerhouse Projects (Approved Budget: $20.7 Million; Substantial Completion: 2021) Scope. This project provided funding for Holm Powerhouse (HPH) Unit 2 upgrades and other items under $1 million involving power generation renewal and equipment replacement. Additionally, this project included upgrades to turbine and generators, and to AC stations intended to extend the life of the unit by 2 0 years. Lastly, the project upgraded the existing oil containment systems at Kirkwood Powerhouse (KPH) and HPH to prevent oil discharge into the environment.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  125 Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-90.

Table 4-90: Other Powerhouse Projects Project Milestones Completed During the Current Reporting Cycle
Milestones Completion Date
Construction Complete (Holm Powerhouse Rehabilitation and Kirkwood Powerhouse Oil Containment)
November 29, 2020
Construction Complete (Cherry Valve House – Bypass Fill Valve for Cherry Power Tunnel)
May 14, 2021
Kirkwood Powerhouse Bypass Upgrades (Approved Budget $16.2 Million; Substantial Completion: 2035)
Scope. The objective for this project is to provide a rel iable hydraulic bypass and energy dissipation system, conveying water around the turbines to the Kirkwood Powerhouse Bypass Chamber and Mountain Tunnel. The scope will be to upgrade/replace the high-pressure energy dissipating valves, control systems, and associated structures to absorb 1,245 feet of pressure head and a flow of 430 cubic feet per second (cfs) without damage.

Milestones Completed During the Reporting Cycle. The project is scheduled and budgeted to begin in 2027; therefore, no milestones were achieved during this reporting cycle.

Moccasin Powerhouse Bypass Upgrade (Approved Budget: $15.0 Million; Substantial Completion 2027)
Scope. The objective for this project is to provide a reliable hydraulic bypass and energy dissipation system , conveying water around the turbines to the Moccasin Reservoir Bypass Pipeline. The scope will be to upgrade/replace the high -pressure energy dissipating valves, control systems, and associated structures to absorb 1,147 feet of pressure head and a flow o f 430 cfs without damage.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-91.

Table 4-91: Moccasin Powerhouse Bypass Upgrade Project Milestones Completed During the Current Reporting Cycle
Milestones Completion Date
NAR (Draft) July 2021
NAR (Final) October 2021
AAR (Draft) January 2022
AAR (Final) March 2022
Note:

AAR = Alternatives Analysis Report
NAR = Needs Assessment Report
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  126 Moccasin Powerhouse and GSU Rehabilitation (Approved Budget: $66.7 Million; Substantial Completion: 2027)
Scope. The project s cope is separated into three phases of work: ( 1) Phase 1 – Generator Rehabilitation, which will replace the stator cores and coils for both generator units that have exceeded their life expectancy; (2) Phase 2 – Generator Step-Up (GSU) Replacement, which will replace two GSU transformers; and (3) Phase 3 – Power Plant Systems Upgrades , which will involve power plant systems upgrades, including replacing the 480 V switchgear, 13.8 kV switchgear, MCCs, main control boards, protective relays, cooling water piping, and improving oil containment systems.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-92.

Table 4-92: Moccasin Powerhouse and GSU Rehabilitation Project Milestones Completed During the Current Reporting Cycle
Phase Milestones Completion Date
CatEx September 28, 2020
Phase 1 DB-121R2 – Advertised Design-Build Contract October 30, 2020 DB-121R2 – Readvertised Design-Build Contract January 2021 DB-121R2 – Issued Design Notice to Proceed June 21, 2021 DB-121R2 – 65% Design December 2021
DB-121R2 – 95% Design June 2022
Phase 2 HH-1003 – Advertised Construction Contract November 20, 2020 HH-1003 – Issued Construction Notice to Proceed June 7, 2021 HH-1003 – GSU1 Installation March 2022
Phase 3 NAR August 2021
Notes:

CatEx = categorical exclusion
GSU = generator step-up
NAR = Needs Assessment Report
Summary of Levels of Service Impacts
LOSs that are supported by the HHWP power generation capital improvements are provided in Table 4-93.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  127 Table 4-93: HHWP Power Generation Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
Other Powerhouse
Projects   
Kirkwood Powerhouse
Bypass Upgrades   
Moccasin Powerhouse
Bypass Upgrade   
Moccasin Powerhouse
and GSU Rehabilitation   
Notes:

GSU = generator step-up
HHWP = Hetch Hetchy Water and Power

4.7 Power Transmission Assets
SFPUC owns and operate s multiple power transmission assets, including high -voltage transmission lines, towers, substations, and switchyards. These assets are all operated and maintained within the Hetch Hetchy Water system.

4.7.1 Hetch Hetchy Water
HHWP is responsible for the maintenance and operation of multiple power transmission assets, most of which are integral to its water delivery system. HHWP performs 5-year inspection on all transmission towers (climbing each tower) and prepares maintenance as needed. These inspections are not included in the maintenance tables. Transmission assets include:

Power Transmission Lines 1 and 2 Intake Switchyard
Power Transmission Lines 3 and 4 Moccasin Switchyard
Power Transmission Lines 5 and 6 Warnerville Substation Power Transmission Lines 7 and 8 Calaveras Substation
Power Transmission Lines 9, 10, and 11

4.7.1.1 Asset Descriptions, Maintenance, and Condition
Asset descriptions, maintenance, and condition for the HHWP p ower transmission assets are provided in the following sections.

Power Transmission Lines 1 and 2
Description. Power Transmission Lines 1 and 2 are used to transmit power from Holm Powerhouse to the Intake Switchyard. This asset consists of 1.5 5 miles of two three -phase conductors that transmit power at a voltage of 230 kV, with 1.5 miles traversing a Tier 2 High Fire Threat District. Supporting the towers is a series of seven lattice steel towers.

Maintenance. Table 4-94 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  128 Table 4-94: Transmission Lines 1 and 2 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
Vegetation Inspection
and Removal
Completed annually Vegetation treatment in accordance with the Transmission Vegetation Management Plan
Maintenance Completed annually Completed as needed
Note:

PM = preventive maintenance
Condition. Transmission Lines 1 and 2 are in good condition and fit for service ; however, given the asset’s age , an updated condition assessment is planned to be completed by late 2025 .

Additionally, there is one site that requires mitigation for “hard clearance.”3 Power Transmission Lines 3 and 4
Description. Power Transmission Lines 3 and 4 are used to transmit power from Moccasin Powerhouse to Calaveras Substation, as well as TID’s Oakdale Substation and PG&E ’s Newark Substation. This asset consists of 98.6 miles of two three-phase conductors that transmit power at a voltage of 115 kV ; with 0.5 mile traversing a Tier 1 High Fire Threat District and 17.4 miles traversing a Tier 2 High Fire Threat District. Supporting the towers is a series of 515 lattice steel towers and two steel monopoles.

Maintenance. Table 4-95 summarizes maintenance work.

Table 4-95: Power Transmission Lines 3 and 4 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
Vegetation Inspection
and Removal
Completed annually Vegetation treatment in accordance with the Transmission Vegetation Management Plan
Maintenance Completed annually Completed as needed
Note:

PM = preventive maintenance
Condition. Power Transmission Lines 3 and 4 are in only fair condition, and it is anticipated that the lines will need capital investment soon. An updated condition assessment is planned to be completed by late 2025. Additionally, Power Transmission Lines 3 and 4 have 77 sites that require mitigation for hard clearances.

3 “H ard clearance” is defined as insufficient safety clearance for roads, buildings, other wires, etc.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  129 Power Transmission Lines 5 and 6
Description. Power Transmission Lines 5 and 6 are used to transmit power from the Intake Switchyard to Warnerville Substation. This asset consists of 48.4 mile s of two three-phase conductors that transmit power at a voltage of 230 kV; with 22.2 miles traversing a Tier 2 High Fire Threat District and 3.3 mile s traversing a Tier 3 High Fire Threat District . Supporting the towers is a series of 513 lattice steel towers and two steel monopoles.

Maintenance. Table 4-96 summarizes maintenance work.

Table 4-96: Power Transmission Lines 5 and 6 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
Vegetation Inspection
and Removal
Completed annually Vegetation treatment in accordance with the Transmission Vegetation Management Plan
Maintenance Completed annually Completed as needed
Note:

PM = preventive maintenance
Condition. Power Transmission Lines 5 and 6 are in good condition and fit for service; however, given the asset’s age, an updated condition assessment is planned to be completed by late 2025.

Additionally, Power Transmission Lines 5 and 6 have 72 sites that require mitigation for hard clearances.

Power Transmission Lines 7 and 8
Description. Power Transmission Lines 7 and 8 are used to transmit power from Warnerville Substation to MID’s Standiford Substation. This asset consists of 12.5 miles of two three -phase conductors that transmit power at a voltage of 115 kV . Supporting the towers is a series of 78 lattice steel towers. This asset is not in a High Fire Threat District.

Maintenance. Table 4-97 summarizes maintenance work.

Table 4-97: Transmission Lines 7 and 8 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
Vegetation Inspection
and Removal
Completed annually Vegetation treatment in accordance with the Transmission Vegetation Management Plan
Maintenance Completed annually Completed as needed
Note:

PM = preventive maintenance
Condition. Power Transmission Lines 7 and 8 are in good condition and fit for service; however, capital investments are required. The existing conductor is inadequate for the impacts caused by Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  130 third-party developers connecting to the bulk electric system. Additionally, there are 18 sites that require mitigation for hard clearances.

Power Transmission Lines 9, 10, and 11
Description. Power Transmission Lines 9, 10, and 11 are used to transmit power from Kirkwood Powerhouse to the In take Switchyard. This asset consists of 1.46 miles of three three -phase conductors that transmit power at a voltage of 230 kV; with 1.4 miles traversing a Tier 2 High Fire Threat District. Supporting the towers are series of four (Lines 9 and 10) and four (Line 11) lattice steel towers.

Maintenance. Table 4-98 summarizes maintenance work.

Table 4-98: Transmission Lines 9, 10, and 11 Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
Vegetation Inspection and
Removal
Completed annually Vegetation treatment in accordance with the Transmission Vegetation Management
Plan
Maintenance Completed annually Completed as needed
Note:

PM = preventive maintenance
Condition. Power Transmission Lines 9, 10, and 11 are in good condition; however, given its age, an updated condition assessment is recommended during the next reporting cycle. Additionally, there are three sites that require mitigation for hard clearances.

Intake Switchyard
Description. The Intake Switchyard is used to aggregate power generated from both Holm Powerhouse and Kirkwood Powerhouse so it can be transmitted on a single set of transmission lines—Power Transmission Lines 5 and 6. During outages of both Kirkwood Powerhouse and/or Holm Powerhouse , power can be back -fed from Power Transmission Lines 5 and 6 to either powerhouse. Integral to the switchyard is a series of eight SF6 breakers, switches, and a control room, all serving operating and protection functions. The Intake Switchyard is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-99 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  131 Table 4-99: Intake Switchyard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Operator walkthroughs
Completed monthly Operator site security inspection
Vegetation Control Completed annually Vegetation removal Maintenance Completed annually Annual maintenance
Note:

PM = preventive maintenance
Condition. The Intake Switchyard is in good condition and is fit for service. Two of the eight circuit breakers were replaced in 2007 (CBs 310 and 330); the remaining circuit breakers (CBs 300, 320, 340, 350, 360, and 370) were replaced in 2013. All of the breakers are well within their expected useful life. A condition assessment of the equipment in control room is recommended bec ause much of it is original and was installed in the 1960s.

Moccasin Switchyard
Description. Moccasin Switchyard is used to provide protection to Power Transmission Lines 5 and 6 and is also a termination point for Power Transmission Lines 3 and 4. Moccasin Switchyard is adjacent to Moccasin Powerhouse and includes two 115 kV oil circuit breakers (OCBs); two 230 kV OCBs; and ancillary equipment such as tw o 2.4 kV distribution transformers, one 480 V distribution transformer, two 13.8 kV isolation transformers, bus work, switches, and grounding.

Moccasin Switchyard is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-100 summarizes maintenance work.

Table 4-100: Moccasin Switchyard Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Operator walkthroughs
Completed monthly Operator site security inspection
Vegetation Control Completed annually Vegetation removal Maintenance Completed annually Annual maintenance
Note:

PM = preventive maintenance
Condition. Moccasin Switchyard is in fair condition and fit for service . The equipment in the switchyard is approaching or has exceeded its expected useful life and requires capital investment.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  132 Warnerville Substation
Description. Warnerville Substation serves as a termination point for Power Transmission Lines 5 and 6 and Power Transmission Lines 7 and 8. It is also a critical connection point to the bulk electric system, where HHWP is typically connected to PG&E’s power transmission system.

Warnerville Substation includes seven SF6 breakers, four OCBs, two auto transformers, multiple switches, and two control rooms. Warnerville Substation is in a non-High Fire Threat District.

Maintenance. Table 4-101 summarizes maintenance work.

Table 4-101: Warnerville Substation Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed weekly Operator walkthroughs
Completed monthly Operator site security inspection
Vegetation Control Completed annually Vegetation removal Maintenance Completed annually Annual maintenance
Note:

PM = preventive maintenance
Condition. Warnerville Substation is in fair condition and is fit for service. The autotransformers and the 230 kV OCBs were replaced in 2020; however, the original 115 kV OCBs remain in service and have exceeded their expected useful life. The remaining OCBs are scheduled for replacement and included in the Warnerville Rehabilitation capital project.

Calaveras Substation
Description. The Calaveras Substation is a small substation that serves as a termination point for Power Transmission Lines 3 and 4. The primary function of Calaveras Substation is to serve the power that is required to operate multiple Regional Water facilities, including the SAPS , Chlorination Plant, and Sunol Filter Plant. Calaveras Substation includes a single transformer, as well as other electrical equipment such as breakers and switches. Calaveras Substation is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-102 summarizes maintenance work.

Table 4-102: Calaveras Substation Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed monthly Operator site security inspection Vegetation Control Completed annually Vegetation control Maintenance Completed annually Annual maintenance
Note:

PM = preventive maintenance
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  133 Condition. Calaveras Substation is in good condition; however, due to growing power demands from Regional Water, along with redundancy concerns, capital investment is recommended.

4.7.1.2 Capital Improvements
HHWP currently has four active capital projects on its power transmission assets, representing a total capital investment of $121.1 million. HHWP also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the se active large capital projects are provided in the following sections.

Transmission Lines 7 and 8 Upgrades (Approved Budget: $38.0 Million; Substantial Completion 2024)
Scope. The Transmission Lines 7 and 8 Upgrades project includes replacing the conductors to mitigate the impacts of new power flows across the HHWP power transmission system due to power generators that were approved to connect to the grid by the California Independent System Operator. T he project’s scope also includes multiple tower raises to mitigate the remaining hard clearance issues. At the completion of the project, Transmission Lines 7 and 8 will have new upgraded conductor, with all hard clearance issues resolved.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-103.

Table 4-103: Transmission Lines 7 and 8 Upgrades Project Milestones Completed During the Current Reporting Cycle
Milestones Completion Date
Design Criteria Report December 7, 2020
35% Design February 1, 2021
65% Design May 14, 2021
95% Design September 24, 2021
Environmental Phase Complete November 15, 2021
Issued for Construction Design January 18, 2022
Contract Advertisement February 11, 2022
Bid Opening March 24, 2022
Bid Award June 28, 2022
Warnerville Substation Rehabilitation (Approved Budget: $34.2 Million; Substantial Completion: 2025)
Scope. The scope of this project includes r eplacement of (1) three existing three -phase autotransformers (with rating s of 150 MVA, 75 MVA, and 75 MVA) with two new 300 MVA autotransformers; (2) seven existing 230 kV OCBs with seven new SF6 breakers; and (3) five existing 115 kV OCBs with four new SF6 breakers. Additionally, the project includes building a new control building and replacing aged components such as buss bars, surge arresters, Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  134 disconnect switches, voltage transformers, capacitive voltage transformers, protection and control relays, yard grounding, fencing, and grading.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-104.

Table 4-104: Warnerville Project Milestones Completed During the Current Reporting Cycle Milestones Completion Date
65% design of a contingency plan for an oil circuit breaker failure April 22, 2021 95% design of a contingency plan for an oil circuit breaker failure June 30, 2021 95% design of a contingency plan for an oil circuit breaker failure August 2021 100% design of a contingency plan for an oil circuit breaker failure January 2022 Electrical Professional Service Contract PRO.0182 Notice to Proceed September 2021 Phase 2 Design Task Order Notice to Proceed May 2022
Moccasin Switchyard Rehabilitation (Approved Budget: $9.7 Million; Substantial Completion:
2028)
Scope. The project will involve rehabilitat ing Moccasin Switchyard by replacing the 115 kV disconnect switches, 115 kV bus work, 230 kV disconnect switches, 230 kV bus work, 115 kV and 230 kV OCBs, and surge arrestors ; and perform ing an analysis of the existing grounding system.

Milestones Completed During the Reporting Cycle . There were no milestones achieved during this reporting cycle. The Moccasin Switchyard Rehabilitation Project is scheduled to kick off in 2022.

Calaveras Substation Upgrades (Approved Budget: $39.2 Million) Scope. The project will involve providing upgrades related to the Calaveras Substation and the electrical poles to and from the substation along Calaveras Road.

Milestones Completed During the Reporting Cycle. There were no milestones achieved during this reporting cycle. The Calaveras Substation Upgrades Project is scheduled to kick off in 2025.

Summary of Levels of Service Impacts
LOSs that are supported by the power transmission system capital improvements are provided in Table 4-105.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  135 Table 4-105: Power Transmission Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
Transmission Lines 7
and 8 Upgrades   
Warnerville Substation
Rehabilitation   
Moccasin Switchyard
Rehabilitation   
Calaveras Substation
Upgrades   

4.8 Power Distribution Assets
SFPUC owns and operates multiple power distribution assets, including pole -mounted transformers, switches, reclosures, and conductors. Most of these assets are within the Hetch Hetchy Water system and traverse Tier 2 and 3 High Fire Threat Districts.

4.8.1 Hetch Hetchy Water
HHWP is responsible for the maintenance and operation of multiple power distribution assets.

These assets include:

Holm Powerhouse to Cherry (HP-CH)
Cherry Dam to Cherry Valve House (CD-CV)
Kirkwood Powerhouse to O’Shaughnessy
(KP-OS)
Mather to Cafeteria (MA-CA)
Mather to Evergreen (MA-EV)
Moccasin Powerhouse to Low Head (MP-LH)
Moccasin Powerhouse to Sewer Treatment Plant
(MP-ST)
O’Shaughnessy to O’Shaughnessy Compound
(OS-OC)

4.8.1.1 Asset Descriptions, Maintenance, and Condition
Asset descriptions, maintenance, and condition s for HHWP p ower distribution assets are provided in the following sections . In addition to annual equipment inspections , HHWP also performs (1) detailed inspections on all distribution poles every 5 years; and (2) distribution pole intrusive/integrity testing on all poles every 10 years.

Holm Powerhouse to Cherry (HP-CH)
Description. The HP-CH line distributes power from Holm Powerhouse to the Cherry Lake Compound and consists of 9.5 mil es of 22 kV overhead conductors in the Stanislaus National Forest. The line also includes one 13.8 kV to 22 kV transformer at Holm Powerhouse. The HPH- CH lines are in a Tier 2 High Fire Threat District (HFTD).

Maintenance. Table 4-106 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  136 Table 4-106: Holm Powerhouse to Cherry Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
April 2022 Pole 4292 compliance inventory confirmation, mapping, and new PM work orders
Maintenance Completed annually Pole 4292 vegetation clearance Completed annually Herbicide application on Granite Portal Line Note:

PM = preventive maintenance
Condition. The HP-CH distribution line is in good condition . Most of this distribution line was replaced in 2013 after the Rim Fire . The line is fit for service; however, other improvements are required.

Cherry Dam to Cherry Valve House (CD-CV)
Description. The CD-CV line is a 1.3-mile branch off the HP-CH line and comprises overhead and underground conductors ,. b oth operat ing at 22 kV. The overhead segment is approximately

0.6 mile, distributing power to the Cherry Valve House at the base of Cherry Lake Dam. The remaining 0.76 mile is underground and supplies 22 kV power to the Cherry–Eleanor Pumps and Cherry-Eleanor Pump Station, all in the Stanislaus National Forest. The CD-CV line is in a Tier 2 HFTD.

Maintenance. Table 4-107 summarizes maintenance work.

Table 4-107: Cherry Dam to Cherry Valve House Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
April 2022 Pole 4292 compliance inventory confirmation, mapping and new PM work orders
Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Condition. The CD-CV distribution line is in good condition. The line is fit for service; however, other improvements are required.

Kirkwood Powerhouse to O’Shaughnessy (KP-OS)
Description. The KP-OS line is a 22 kV overhead distribution line that begins at Kirkwood Powerhouse, in the Stanislaus National Forest. It provides power to HHWP facilities at Hetch Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  137 Hetchy Reservoir in Yosemite National Park. The KP-OS line spans approximately 17.4 overhead conductor miles through a Tier 2 High Fire Threat District.

Maintenance. Table 4-108 summarizes maintenance work.

Table 4-108: Kirkwood Powerhouse to O’Shaughnessy Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment) October 2020 10-year distribution pole intrusive/integrity testing (portion of KP-OS segment)
April 2022 Pole 4292 compliance inventory confirmation, mapping and new PM work orders
Maintenance Completed annually Pole 4292 vegetation clearance Completed annually Herbicide application on Intake Camp Line Note:

KP-OS = Kirkwood Powerhouse to O’Shaughnessy
PM = preventive maintenance
Condition. The KP-OS distribution line is in good condition, having been mostly replaced in 2013 after the Rim Fire. The line is fit for service; however, other improvements are required.

Mather to Cafeteria (MA-CA)
Description. The MA-CA line is a 2.4 kV overhead line that branches off the 22 kV KP-OS line. The MA-CA line is in the Stanislaus National Forest and feeds the Camp Mather Cafeteria building.

The MA-CA line consists of approximately 0.6 mile of overhead conductor and is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-109 summarizes maintenance work.

Table 4-109: Mather to Cafeteria Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment) April 2022 Pole 4292 compliance inventory confirmation, mapping and new PM work orders
Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Condition. The MA-CA distribution line is fit for service; however, the line is in need of upgrades and repairs, which are scheduled to take place in the fall of 2022.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  138 Mather to Evergreen (MA-EV)
Description. The MA-EV line is a 2.4 kV overhead line that branches off the 22 kV KP-OS line. The MA-EV line is in the Stanislaus National Forest. It feeds power to the Evergreen Lodge, a privately owned facility adjacent to Camp Mather. The MA -EV line consists of approximately 0.9 mile of overhead conductor and is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-110 summarizes maintenance work.

Condition. The MA-EV distribution line is in good condition. The line is fit for service; however, other improvements are required.

Table 4-110: Mather to Evergreen Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
April 2022 Pole 4292 compliance inventory confirmation, mapping and new PM work orders
Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Moccasin Powerhouse to Low Head (MP-LH)
Description. The MP-LH overhead line distributes power from Moccasin Powerhouse to the Moccasin Low Head Powerhouse via the Moccasin Switchyard 13.8 kV cabinet. It provides 2.4 kV power distribution to the upper cottages in Moccasin c amp, Moccasin UV building, Moccasin maintenance shops, the Moccasin peak radio tower, Moccasin spray fields, Priest Reservoir gate house, Priest butterfly valves, West Portal cottage, Priest cottage, and the California Department of Fish and Wildlife Fish Hatchery and residences. The MP -LH line consists of approximately

7.4 miles of overhead conductor and is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-111 summarizes maintenance work.

Table 4-111: Moccasin Powerhouse to Low Head Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
March 2022 Pole 4292 compliance inventory confirmation, mapping and new PM work orders
Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  139 Condition. The MP-LH distribution line is in good condition. The line is fit for service; however, other improvements are required.

Moccasin Powerhouse to Sewer Treatment Plant (MP-ST)
Description. The MP-ST line is a 2.4 kV overhead line in the town of Moccasin, Tuolumne County.

It provides 120/240 V power to Moccasin cottages 1- 18, Engineering, Records, Energy Services, and the Moccasin Administration Building. Underground segments provide the power to light poles around the Moccasin Reservoir and Administration. The MP- ST line consists of approximately 1.5 mil es of overhead conductor, and the underground portion length is unknown. The MP-ST line is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-112 summarizes maintenance work.

Condition. The MP-ST distribution line is in good condition. The line is fit for service; however, other improvements are required.

Table 4-112: Moccasin Powerhouse to Sewer Treatment Plant Preventive Maintenance Summary
(July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
March 2022 Pole 4292 compliance inventory confirmation, mapping and new PM work orders
Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
O’Shaughnessy to O’Shaughnessy Compound (OS-OC)
Description. The OS-OC line is a 2.4 kV line off the 22 kV KP-OS line in Yosemite National Park.

It provides overhead power to the O’Shaughnessy Cottages 1, 2, 3, and 4, NPS buildings, chlorination building, UV building, and water tanks. The underground portion provides power to O’Shaughnessy Chalet, the sewer pump station, emergency generators, lift station pumps, and O’Shaughnessy Dam Gallery 1. The OS -OC line consists of approximately 0.5 mile of overhead conductor, with 0.1 mile underground, and is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-113 summarizes maintenance work.

Condition. The OS-OC line is in good condition. The line is fit for service; however, other improvements are required.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  140 Table 4-113: O’Shaughnessy to O’Shaughnessy Compound Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Aerial inspection by helicopter (vegetation and equipment)
April 2022 Pole 4292 compliance inventory confirmation, mapping and new PM work orders
Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance

4.8.1.2 Capital Improvements
Capital i mprovements to the Power Distribution system are defined in the HHWP’s R&R Program.

4.8.2 Regional Water
WSTD is responsible for O&M of multiple power distribution assets. These assets include:

Calaveras Dam Power Pole Line (CDL) Pulgas Power Pole Line (PUL) Calaveras Substation Power Pole Line (CSL) San Andreas Lake Power Pole Line (SAL) Crystal Springs Power Pole Line (CYL) Sawyer Camp Power Pole Line (SCL) Pilarcitos Power Pole Line (PPL) Sunol Water Temple Power Pole Line (STL)

4.8.2.1 Asset Descriptions, Maintenance, and Condition
Asset descriptions, maintenance, and condition for WSTD power distribution assets are provided in the following sections . In addition to annual equipment inspections, WSTD performs (1) detailed inspections on all distribution poles every 5 years; and (2) distribution pole intrusive/ integrity testing on all poles every 10 years.

Calaveras Dam Power Pole Line (CDL)
Description. CDL is a 120/240 V overhead distribution line in Alameda County that provides power to the Calaveras Dam Adit and the Calaveras Rese rvoir watershed keepers cottage. CDL is approximately 0.1 overhead mile long and is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-114 summarizes maintenance work.

Condition. CDL is in fair condition. The line is fit for service; however, other improvements are being evaluated.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  141 Table 4-114: Calaveras Dam Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Visual ground inspection of equipment December 2020 5-year detailed inspections on all distribution poles December 2020 10-year distribution pole intrusive/integrity testing Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Calaveras Substation Power Pole Line (CSL)
Description. CSL is a 21.6 kV overhead distribution line in Alameda County that provides power to SVWTP, SAPS, Sunol Valley Chloramines facility, the AEP Station, and the AWP Station. CSL is approximately 3.8 overhead miles in length and is in a Tier 2 High Fire Threat District.

Maintenance. Table 4-115 summarizes maintenance work.

Table 4-115: Calaveras Substation Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Visual ground inspection of equipment December 2020 5-year detailed inspections on all distribution poles December 2020 10-year distribution pole intrusive/integrity testing Maintenance Completed annually Pole 4292 vegetation clearance Completed annually Hot washing of contaminated insulators (due to quarry activities)
Note:

PM = preventive maintenance
Condition. CSL is in good condition. The line is fit for service; however, other improvements are being evaluated.

Crystal Springs Power Pole Line (CYL)
Description. CYL is a 2.7 kV overhead distribution line in San Mateo County. CYL provides power to the Crystal Springs watershed k eeper’s cottage and the reservoir entrance gates. CYL is

0.7 overhead mile in length and is within a Tier 2 High Fire Threat District.

Maintenance. Table 4-116 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  142 Table 4-116: Crystal Springs Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Visual ground inspection of equipment February 2022 10-year distribution pole intrusive/integrity testing Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Condition. CYL is in good condition. The line is fit for service; however, other improvements are being evaluated.

Pilarcitos Power Pole Line (PPL)
Description. PPL is a 4.16 kV overhead distribution line in San Mateo County. PPL provides power to the Davis Tunnel watershed keeper’s cottage, the Pilarcitos w atershed keeper’s cottage, and the forebay metering and gate valves on the Pilarcitos Dam. PPL is 9.5 overhead miles in length and is in a Tier 3 High Fire Threat District.

Maintenance. Table 4-117 summarizes maintenance work.

Table 4-117: Pilarcitos Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Visual ground inspection of equipment November 2021 5-year detailed inspections on all distribution poles November 2021 10-year distribution pole intrusive/integrity testing Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Condition. PPL is in fair condition. The line is fit for service; however, other improvements are being evaluated.

Pulgas Power Pole Line (PUL)
Description. The PUL is a 4.16 kV overhead distribution line in San Mateo County. PUL provides power to the Pulgas Valve Lot and small water quality sampling stations in the valve lot. PUL is approximately 0.6 overhead line mile long and in a Tier 2 High Fire Threat District.

Maintenance. Table 4-118 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  143 Table 4-118: Pulgas Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Visual ground inspection of equipment Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Condition. PUL is in fair condition. The line is fit for service; however, other improvements are being evaluated.

San Andreas Lake Power Pole Line (SAL)
Description. SAL is a 4.16 kV overhead distribution line in San Mateo County. SAL provides power to the North San Andreas watershed keeper’s cottage and is approximately 0.6 overhead mile long. This line is in a Tier 3 High Fire Threat District.

Maintenance. Table 4-119 summarizes maintenance work.

Table 4-119: San Andreas Lake Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Visual ground inspection of equipment Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Condition. SAL is in fair condition. The line is fit for service; however, other improvements are being evaluated.

Sawyer Camp Power Pole Line (SCL)
Description. SCL is a 4.16 kV overhead distribution line in San Mateo County. SCL provides power to the Sawyer Camp watershed keeper’s cottage and a small storage facility near Sawyer Camp Lake. SCL is approximately 0.5 overhead line mile in length and is in a Tier 3 High Fire Threat District.

Maintenance. Table 4-120 summarizes maintenance work.

Condition. SCL is in fair condition. The line is fit for service; however, other improvements are being evaluated.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  144 Table 4-120: Sawyer Camp Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Visual ground inspection of equipment June 2022 10-year distribution pole intrusive/integrity testing Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Sunol Water Temple Power Pole Line (STL)
Description. STL is a 480 V overhead distribution line in Alameda County. STL provides power to the Sunol Water Temple and smaller facilities surrounding it. STL is approximately 0.1 overhead mile long and in a Tier 2 High Fire Threat District.

Maintenance. Table 4-121 summarizes maintenance work.

Table 4-121: Sunol Water Temple Power Pole Line Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Visual ground inspection of equipment July 2021 5-year detailed inspections on all distribution poles July 2021 10-year distribution pole intrusive/integrity testing Maintenance Completed annually Pole 4292 vegetation clearance Note:

PM = preventive maintenance
Condition. STL is in good condition. The line is fit for service; however, other improvements are being evaluated.

4.8.2.2 Capital Improvements
Currently, there are no capital projects planned for these assets.

4.9 Watersheds, Roads, and Bridges
To access RWS facilities, SFPUC maintains various roads and bridges across the region. SFPUC also maintains and manages watersheds that feed their Bay Area reservoirs. The responsibility for O&M of these assets is divided geographically between both HHWP and NRLMD. A map of the SFPUC watersheds is included as Appendix D.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  145

4.9.1 Hetch Hetchy Water
HHWP is responsible for the maintenance and operation of a series of roads and bridges along its system, including almost 40 miles of paved roads, 12 bridges, and an unknown n umber of miles of unpaved access roads. Many of the roads and bridges are also used by USFS and NPS personnel to access federal assets and resources. Additionally, these assets are used by the public to access the Stanislaus National Forest and Yosemite National Park.

4.9.1.1 Asset Descriptions, Maintenance, and Condition
Cherry Lake Road
Description. Cherry Lake Road is a 23.5- mile-long paved road that extends from H ighway 120, east of Groveland, to Lake Lloyd (aka Cherry Lake). Cherry Lake Road was formerly referred to as Cherry Oil Road.

Maintenance. Table 4-122 summarizes maintenance work.

Table 4-122: Cherry Lake Road Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Maintenance Completed annually Clean ditches and grade right-of-way roads Completed annually Road improvements and paving
Completed seasonally Culvert cleaning
Completed seasonally Snow removal
Note:

PM = preventive maintenance
Condition. Cherry Lake Road is in good condition and is fit for service. Portions of the road surface were patched and chip-sealed, and roadside drainage culverts were cleared during the reporting cycle.

Hetch Hetchy Road
Description. Hetch Hetchy Road is a 17-mile-long paved road. It extends from Cherry Lake Road (at approximate mile post 5) to O’Shaughnessy Dam and Hetch Hetchy Reservoir and has uses similar to those of Cherry Lake Road; however, it also serves as a redundant route to Camp Mather.

Maintenance. Table 4-123 summarizes maintenance work.

Condition. Hetch Hetchy Road is in good condition and is fit for service. Portions of the road surface were patched and chip -sealed, and roadside drainage culverts were cleared during the reporting cycle.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  146 Table 4-123: Hetch Hetchy Road Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Maintenance Completed annually Clean ditches and grade right-of-way roads Completed annually Road improvements and paving
Completed seasonally Culvert cleaning
Completed seasonally Snow removal
Note:

PM = preventive maintenance
O’Shaughnessy Adit Access Bridge
Description. The O’Shaughnessy Adit Access Bridge (aka the Hetchy Adit Bridge) is a four-span, simply supported bridge with timber stringers and deck, and reinforced concrete piers . The bridge has a total length of 136 f eet, spanning the Tuolumne River , and is downstream of O’Shaughnessy Dam. The primary function of the bridge is to provide access to Canyon Tunnel’s Hetchy Adit.

Maintenance. Table 4-124 summarizes maintenance work.

Table 4-124: O’Shaughnessy Adit Access Bridge Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Maintenance Completed annually Cleaning and inspection of bridge Note:

PM = preventive maintenance
Condition. O’Shaughnessy Adit Access Bridge is in fair condition and is currently meeting access needs. However, access to the Hetchy Adit for the upcoming bulkhead construction project requires increased loading on O’Shaughnessy Adit Access Bridge ; improvements are being planned.

Cherry Lake Road Bridge at Early Intake
Description. The Cherry Lake Road Bridge at Early Intake (aka Early Intake Bridge) is a two-span, simply supported bridge with rolled steel beams, timber deck, and reinforced concrete piers. The bridge has a total length of 24 f eet, spanning the Tuolumne River, and is downstream of Early Intake Dam. The primary function of the bridge is to provide access to multiple cr itical assets in the Stanislaus National Forest.

Maintenance. Table 4-125 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  147 Table 4-125: Cherry Lake Road Bridge at Early Intake Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Bridge inspection
Maintenance Completed annually Intake wooden bridge cleaning Note:

PM = preventive maintenance
Condition. Cherry Lake Road Bridge at Early Intake is in fair condition and is fit for service for some activities. However, weight limitations have impacted HHWP’s operations at times.

Cherry Lake Road Bridge at Cherry Creek
Description. The Cherry Lake Road Bridge at Cherry Creek (aka Cherry Creek Bridge) is a three- span, continuous bridge with steel beams, reinforced concrete deck, steel bents , and reinforced concrete piers. The bridge has a total length of 27 f eet, spanning Cherry Creek, and is upstream of Holm Powerhouse. The primary function of the bridge is to provide continuity of Cherry Lake Road over Cherry Creek, establishing access to multiple water and power assets in the Stanislaus National Forest.

Maintenance. Table 4-126 summarizes maintenance work.

Table 4-126: Cherry Lake Road Bridge at Cherry Creek Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Bridge inspection
Note:

PM = preventive maintenance
Condition. Cherry Lake Road Bridge at Cherry Creek is in fair condition and is fit for service.

Holm Access Bridge
Description. The Holm Access Bridge (aka Holm Intake Bridge) is a three-span, continuous bridge with reinforced concrete beams, deck , and piers. The bridge has a total length of 136 f eet, spanning Cherry Creek, and is downstream of Holm Powerhouse. The primary function of the bridge is to provide access to Holm Powerhouse.

Maintenance. Table 4-127 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  148 Table 4-127: Holm Access Bridge Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed annually Bridge inspection for Holm Powerhouse Bridge Completed annually Bridge inspection for Holm Powerhouse Bridge Vegetation
Note:

PM = preventive maintenance
Condition. Holm Access Bridge is in fair condition and is fit for service.

South Fork Siphon Access Bridge
Description. The South Fork Siphon Access Bridge (aka South Fork Bridge ) is a single -span, welded truss bridge with reinforced concrete deck and abutments. The bridge has a total length of 220 feet, spanning the Middle Fork of the Tuolumne River, and is north of Highway 120 near its intersection with Cherry Lake Road. The primary function of the bridge is to provide access to Mountain Tunnel’s South Fork Siphon.

Maintenance. No PM was required or completed during this period.

Condition. South Fork Siphon Access Bridge is in good condition and is fit for service.

Cherry Lake Road Bridge at Middle Fork
Description. The Cherry Lake Road Bridge at Middle Fork (aka Middle Fork Bridge) is a three- span bridge with a pre-stressed box girder main span, reinforced concrete slabs for the remaining spans, and reinforced concrete piers and abutments. The bridge has a total length of 102 feet, spanning the Middle Fork of the Tuolumne River , and i s north of South Fork Yard , near the intersection of Cherry Lake Road and H ighway 120. The primary function of the bridge is to provide access to multiple water and power assets in the Stanislaus National Forest.

Maintenance. No PM was required or completed during this period.

Condition. Cherry Lake Road Bridge at Middle Fork is in good condition and is fit for service.

Moccasin Creek Debris Deflector Bridge
Description. The Moccasin Creek Debris Deflector Bridge (aka Moccasin Creek Bridge) is an eight- span, continuous bridge with timber stringers and deck, steel piers, and reinforced concrete abutments. The bridge has a total length of 136 feet, spanning Rattlesnake Creek, and is upstream of Moccasin Reservoir. The primary function of the bridge is to serve as a debris barrier to help keep debris from entering the Moccasin Diversion Pipe during medium- and high-flow events.

Maintenance. Table 4-128 summarizes maintenance work.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  149 Table 4-128: Moccasin Creek Debris Deflector Bridge Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Inspection Completed bi-annually Inspect for debris
Note:

PM = preventive maintenance
Condition. The Moccasin Creek Debris Deflector Bridge is in good condition and is fit for service.

The bridge deck timber and guardrails were replaced in 2021/2022.

California Aqueduct Bridges 1 and 2
Description. The California Aqueduct Bridges 1 and 2 (aka Hetch Hetchy Maintenance Bridges 1 and 2) are both two-span, continuous bridges with reinforced concrete beams, decks, and piers.

The bridges each have a length of 144.5 feet, spanning the California Aqueduct in the Central Valley. The primary function of the bridge is to provide access for HHWP personnel performing O&M activities along the SJPLs and power transmission system.

Maintenance. No PM was required or completed during this period.

Condition. The California Aqueduct Bridges are in serviceable condition. The bridge railings were replaced in 2021; this was the only corrective action recommended in the condition assessment.

Oakdale Irrigation District Bridges 1 and 2
Description. The Oakdale Irrigation District Bridges 1 and 2 (aka OID 1 and OID 2) are single-span bridges with rolled steel beams, timber decks , and reinforced concrete abutments. OID 1 has an overall length of 102 feet, spanning the Brichetto Lateral Canal ; OID 2 has an overall length of

83.5 feet, spanning the Claribel Lateral Canal. The primary function of the bridges is to provide access for HHWP personnel performing O&M activities along the SJPLs and power transmission system.

Maintenance. No PM was required or completed during this period.

Condition. The surface deck of California Aqueduct Bridge 1 needs to be replaced but is currently meeting access needs; repairs are being planned. California Aqueduct Bridge 2 is in serviceable condition, with no planned repairs.

4.9.1.2 Capital Improvements
HHWP currently has two active capital projects on its watershed, roads, and bridges assets, representing a total capital investment of $41.1 million. HHWP also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the se active large capital projects are provided in the following sections.

Holm Bridge Rehabilitation (Approved Budget: $11.7 Million; Substantial Completion: 2036) Scope. The project will involve replacing the 136-foot, three-span, continuously supported bridge over Cherry Creek that provides the only access to Holm Powerhouse. Bridge replacement will Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  150 address seismic and current Caltrans design standard deficiencies (e.g., T- beam steams, end diaphragms, and lateral struts).

Milestones Completed During the Reporting Cycle. There were no milestones achieved during this reporting cycle. The Holm Bridge Rehabilitation Project is scheduled to kick off in 2030.

Bridge Replacement (Four Bridges) (Approved Budget: $29.4; Substantial Completion: 2027) Scope. The project will involve providing rehabilitation and/or replacement of the O’Shaughnessy Adit Access Bridge and the Lake Eleanor Dam Bridge.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in the Table 4-129.

Table 4-129: Bridge Replacement (Four Bridges) Project Milestones Completed During the Current Reporting Cycle
Milestones Completion Date
Issued Notice to Proceed under PRO-0085.B for surveying, geotechnical investigation, and hydraulic analysis for O’Shaughnessy Adit Access Bridge
October 2020
Completed topographic survey and seismic refraction study for O’Shaughnessy Adit Access Bridge
May 2021
Completed geotechnical evaluation and geotechnical data report for O’Shaughnessy Adit Access Bridge
October 2021
Completed Geotechnical Data Report (Final) for O’Shaughnessy Adit Access Bridge
December 2021
Summary of Levels of Service Impacts
LOSs that are supported by the watershed, roads, and bridges capital improvements are provided in Table 4-130.

Table 4-130: Watershed, Roads, and Bridges – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
Holm Bridge
Rehabilitation 
Bridge Replacement
(four Bridges) 

4.9.2 Regional Water
NRLMD is responsible for the O&M of the SFPUC Alameda and Peninsula watersheds, including the roads, fences, fuel breaks, and culverts in those watersheds. PM activities for these assets are Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  151 determined and scheduled by NRLMD . The maintenance is performed by other WE divisions, contractors overseen by NRLM staff, or NRLM staff themsel ves. Some of these assets are in Maximo, but many are not. Work being performed in the watershed includes:
• Maintenance of the watersheds:
— Ingress/egress, including gates, locks, and fencing
— Vegetation management for roadside clearance, fuels management, hazard tree removal, and invasive species control
— Maintenance of rangeland management infrastructure, including solar groundwater pumps, troughs, piping, and spring boxes
— Maintenance and monitoring of the Bioregional Habitat Restoration mitigation sites • Maintenance of roads and culverts:
— Grading, rocking, and/or repaving roads
— Clearing roadside ditches or drainage ditches of seasonal debris — Cleaning and repairing culvert inlet and outlet structures — Culvert repair, replacement, and installation
• Maintenance of the transmission pipeline ROWs:
— Vegetation management for state weed abatement compliance, fuels management , and hazard tree removal
— Removal of trash, debris, and other materials for health and safety and code compliance

4.9.2.1 Capital Improvements
Regional Water currently has eight active capital projects on its watershed, roads, and bridges assets, representing a total capital investment of $21.5 million. Regional Water also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of the active large capital projects are provided in the following sections.

East Bay Regional Park District Water System (Approved Budget:$5.5 Million; Substantial Completion: 2022)
Scope. As a mitigation for the Calaveras Dam Replacement Project ( CDRP), SFPUC agreed to construct new potable water distribution facilities for the Sunol Regional Wilderness Park (SRP), managed by the East Bay Regional Park District ( EBRPD). The project purpose is to provide a reliable water supply for potable use at the EBRPD facilities and to provide potable uses at the SRP. Project work includes (1 ) modification of the existing High Valley water system; (2) installation of new High Valley pipeline and appurtenances; (3 ) modification of the existing headquarters water system; (4) installation of a new fire suppression system; (5) installation of a new control system; (6) replacement and installation of new solar panels; (7) micro-surfacing of Geary Road from the entrance park sign to the entrance of the Ohlone Bridge; (8) pavement and site restoration along locations where the project requires trench excavation; (9) setup of wildlife exclusion fencing and environmental mitigation/monitoring; and (10) site restoration, including hydroseeding, hiking trail, asphalt pavement, grading, and fences.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-131.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  152 Table 4-131: EBRPD Water System Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Environmental Approval November 5, 2020
Construction Notice to Proceed May 10, 2021
Substantial Completion January 21, 2022
Sneath Lane Gate/San Andreas (Approved Budget: $6.7 Million; Substantial Completion: 2026) Scope. The 2001 Peninsula Watershed Management Plan identified the need for a new trail connection between San Mateo County’s Crystal Springs Regional Trail (North San Andreas) to Golden Gate National Recreation Area’s (GGNRA) Sweeney Ridge property at the Sneath Lane Gate. The project includes construction of a multi -modal, 6-foot-wide trail that would be approximately 1.25 miles long and would include a new trailhead , south of GGNRA’s parking lot at the end of Sneath Lane in Pacifica. The project will include the following related construction tasks: (1) tree removal ; (2) installation of w ildlife-friendly security fencing ; (3) grading and drainage work; (4 ) paving of one trailhead parking areas with educational signage; (5) protection of sensitive habitat; and (6) site/vegetation restoration.

This project is an example of investing in watershed management compatible with protecting the watershed lands and provid ing an opportunity to educate the public about the SFPUC water system and watershed land management.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in Table 4-132.

Table 4-132: Sneath Lane Gate/San Andreas Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
Conceptual Engineering Report January 31, 2022
Southern Skyline Blvd Ridge Trail Extension (Approved Budget: $25.3 Million; Substantial Completion: 2022)
Scope. South of Highway 92, this proposed project would construct a 6- mile-long trail on the Peninsula Watershed in San Mateo County between Highway 92 and the Golden Gate National Recreation Area’s (GGNRA) Phleger Estate. The project consists of (1) a 6-foot-wide, all-weather surface trail; (2) retaining structures to stabilize cut and/or fill slopes; (3) drainage facilities; (4) a 15,000-square-foot parking lot accommodating as many as 14 cars; and ( 5) two pre-fabricated restrooms along the trail; (6) site security features; and (7) landscape restoration.

North of Highway 92, the project includes construction of (1) a trail segment adjacent to the Fifield Cahill Trail that is compliant with the Americans with Disabilities Act; (2) a 16,000-square foot parking lot; and (3) one prefabricated restroom.

In addition, the project includes the following construction and construction -related work :
(1) removal of 160 trees; (2) installation of 9.3 miles of wildlife -friendly security fencing; Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  153 (3) grading and drainage work; (3 ) installation of 2,000-linear-foot soldier pile retaining walls; (4) paving of two trailhead parking areas with educational signage; (5 ) protection of sensitive habitat; (6) traffic control; and (7) site/vegetation restoration.

This project is an example of investing in watershed management compatible with protecting the watershed lands and providing an opportunity to educate the public about the SFPUC water system and watershed land management.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-133.

Table 4-133: Southern Skyline Boulevard Ridge Trail Extension Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
NEPA Permit Approval May 11, 2021
Bid Advertisement March 30, 2022
Note:

NEPA = National Environmental Policy Act
SA-1 Service Road/Ingoing Road (Approved Budget: $15.8 Million; Substantial Completion: 2025) Scope. SFPUC has identified landslide and erosion damage that ha s destabilized service roads (East Shore Service Road and West Shore Service Road) and adjacent areas in three locations on Peninsula Watershed lands along the San Andreas Reservoir in San Mateo County.

Recommendations for the short -term and long -term repairs of the roads are being evaluated.

Construction constraints that have been identified include dewatering the San Andreas Reservoir to 441 feet; and avoiding construction activities in the months of January to March, due to Hetch Hetchy shutdown. Depending on the findings, the potential scope of work specific to these three locations includes (1) construction of shoreline riprap north of the east ern shore service road (approximately 77 0 feet); (2 ) re-alignment of the roadway (approximately 35 0 feet) and construction of shoreline riprap (approximately 400 feet) at the eastern shore service road; (3) construction of a pile wall (approximately 550 feet ) and shoreline riprap (approximately 550 feet) at the western shore service road; and (4) installation of a debris boom.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-134.

Table 4-134: SA-1 Service Road/Ingoing Road Project Milestones Completed During the Current Reporting Cycle
Milestone Date Complete
AAR April 2021
Conceptual Engineering Report February 2022
Note:

AAR = Alternatives Analysis Report
Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  154 Watershed and ROW Protection – Land Acquisition
The Watershed and Environmental Improvement Program (WEIP) includes the comprehensive identification and protection of critical watershed lands and ecosystem restoration needs within the hydrologic boundaries of the Alameda Creek, Peninsula (San Mateo and Pilarcitos Creeks) , and Tuolumne River watersheds; and prioritizes the protection and/or restoration of these lands.

Projects under this program will protect source water quality ; protect native species and their habitat; and identify critical watershed lands for protection by purchasing fee title and/or perpetual conservation easements from willing landowners. Initial funding for th is program came from WSIP bond funds ($20 mil lion); now that these funds have been expended , funding will come from CIP bond funds. The first project funded from this program was approved by SFPUC in December 2021 to acquire approximately 653 acre s of primary Alameda Watersh ed lands in Alameda and Santa Clara counties. This project is now complete, and a second project of similar scale , also in the Alameda Watershed , is in the appraisal process and expected to be considered by SFPUC in early 2023.

Summary of Levels of Service Impacts
LOSs that are supported by the RWS watershed, roads, and bridges capital improvements are provided in Table 4-135.

Table 4-135: RWS Watershed, Roads, and Bridges Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
EBRPD Water System 
Sneath Lane Gate/San
Andreas  
Southern Skyline Blvd
Ridge Trail Extension  
SA-1 Service Road/
Ingoing Road  
Watershed and ROW
Protection – Land
Acquisition
  
Note:

EBRPD = East Bay Regional Park District
ROW = right-of-way
RWS = Regional Water System

4.10 Wastewater Treatment Assets

4.10.1 Hetch Hetchy Water
HHWP is responsible for the maintenance and operation of small wastewater systems that serve its buildings and ground asse ts at multiple upcountry locations. These wastewater systems include:

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  155 O’Shaughnessy Wastewater System
Early Intake Wastewater System
Moccasin Wastewater System

4.10.1.1 Asset Descriptions, Maintenance, and Condition O’Shaughnessy Wastewater System
Description. The sewage system leading to the lift station is made up of iron pipe coming from the cottages and gravity, feeding a main sewer line running along O’Shaughnessy Camp R oad. At the lift station, the main sewer pipe feeds a grinder to ensure that only solids are deposited into the wet well sewage tank. In the l ift station, pumps maintain proper levels in the sewage tank through float switches and a control panel. The station pumps transfer sewage from the wet well to the main septic tanks on the opposite end of O’Shaughnessy Camp next to the restrooms near the exit loop. These septic tanks also handle sewage from nearby restrooms. Effluent from these septic tanks continues to a final holding tank fitted with an automatic syphon device to regulate discharge. When the tank drains, effluent is sent down to the 36,000-sq uare-foot spray/leach field. O’Shaughnessy Camp benefits from having both a spray field and leach field system for best absorption of effluent in all climates.

Maintenance. Table 4-136 summarizes maintenance work.

Table 4-136: O’Shaughnessy Wastewater System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Wastewater Sampling N/A Sampling of wastewater not required under current permit
Inspection Completed daily Facility inspected by Stationary Engineer Surveillance and
Monitoring
Continuously monitored Audible alarm system on site
Completed daily Plant visually monitored for proper operation of equipment and treatment processes
Completed annually Effluent flows and operational data reported by Stationary Engineering Crew.

Notes:

PM = preventive maintenance
N/A = not applicable
Condition. A condition assessment was completed, and the O’Shaughnessy l ift station is scheduled for replacement. Additionally, the spray field is not operational.

Early Intake Wastewater System
Description. The Early Intake facility consists of the Kirkwood Powerhouse and its related O&M complex. Wastewater is generated from domestic uses of the various residential and facility - related structures , including seven cottages, a bunkhouse, a dining hall, offices, a pool, bathrooms, and a switchyard bathroom. The Kirkwood Powerhouse generates industrial wastewater consisting of water that seeps into the powerhouse and general operations. This water Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  156 is collected by a drainage and sump system , incorporating an oil /water separator system to remove potential food grade grease and oil. The wastewater system collects and transports wastewater to the established leachfield west of the switchyard, using sewers, pipes, pumps, and lift stations. To prevent breakage during pot ential flood events, the sewer line crosses the Tuolumne River through a double contained line that is securely attached to the decking and framework of the vehicular bridge that crosses the river. The engineered leachfield contains 16 observation wells that are systematically spaced to monitor the wastewater levels.

Maintenance. Table 4-137 summarizes maintenance work.

Table 4-137: Early Intake Wastewater System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Wastewater Sampling Completed quarterly Sample plant effluent for suspended solids, biology, and chemistry
Inspection Completed daily Facility inspected by Stationary Engineer Surveillance and
Monitoring
Continuously monitored Plant monitored continuously via SCADA alarms Completed quarterly Effluent flows and operational data reported by Stationary Engineering Crew.

Notes:

PM = preventive maintenance
SCADA = supervisory control and data acquisition
Condition. The Early Intake wastewater system is operational; however, due to its age, a condition assessment is recommended to determine whether capital investments are needed.

Moccasin Wastewater System
Description. The Moccasin Sewage Treatment Plant (MSTP) consists of an extended aeration package plant , with disposal by means of spray irrigation and periodic sludge removal. The MSTP collection system consists of approximately 1 mile of sewer main line and various laterals to structures receiving wastewater service. The collection system operates primarily under gravity, with a lift station providing final delivery. Wastewater originates from a complex of residences, a maintenance complex, small water quality laboratory , and administrative offices.

Flows to the MSTP typically range between 5,000 gal lons and 20,000 gallons per day. There ar e three monitoring wells (M-1, M-2B, and M-3) installed around the effluent pond; they are purged and sampled on a quarterly basis to monitor potential groundwater impacts from MSTP operations.

Maintenance. Table 4-138 summarizes maintenance work.

Condition. A condition assessment was completed, and a capital project was approved to replace MSTP.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  157 Table 4-138: Moccasin Wastewater System Preventive Maintenance Summary (July 1, 2020, through June 30, 2022)
Name of PM Completion Date(s) Description
Wastewater Sampling Completed biweekly Sample plant effluent for dissolved and suspended solids and chemistry
Inspection Completed daily Facility inspected by Stationary Engineer Surveillance and
Monitoring
Continuously monitored Plant monitored continuously via SCADA alarms Completed daily Sampling of pH, DO, and flow rates are performed by Stationary Engineering Crew
Notes:

DO = dissolved oxygen
PM = preventive maintenance
SCADA = supervisory control and data acquisition

4.10.1.2 Capital Improvements
HHWP currently has one active capital project on its wastewater treatment assets, representing a total capital investment of $8.8 million. HHWP also has multiple R&R projects that are smaller in scope budget and are reported annually. Summaries for each of this active large capital projects are provided in the following sections.

Moccasin Wastewater Treatment Plant (Approved Budget: $8.8 Million; Substantial Completion: 2025)
Scope. The project will involve replacing the existing Moccasin wastewater treatment plant with a package two -train sequencing batch re actor (SBR) plant with grit removal and screening facilities, upgraded electrical and flow monitoring systems, flow equalization, SCADA instrumentation and automation features, and related site improvements.

Milestones Completed During the Reporting Cycle. The milestone achieved by the project during this reporting cycle is summarized in the Table 4-139.

Table 4-139: Moccasin Wastewater Treatment Plant Project Milestones Completed During the Current Reporting Cycle
Milestones Completion Date
Issued Notice to Proceed under PRO-0085.C for engineering support during design and construction phases.

April 2022
Summary of Levels of Service Impacts
LOSs that are supported by the HHWP wastewater treatment capital improvements are provided in Table 4-140.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  158 Table 4-140: HHWP Wastewater Treatment Project – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
Moccasin Wastewater
Treatment Plant 
Note:

HHWP = Hetch Hetchy Water and Power

4.11 Communications and Control Assets
This category includes assets related to field communications, telephone, SCADA , and facility security. WE communication infrastructure includes microwave, fiber, and cable. SCADA system platforms include Wonderware, eDNA, and OSI. Phone system platforms include Avaya. The security system platform is Lenel. Cellular phone service providers also provide valuable service beyond voice communications. 4G and LTE systems allow transmission of data such as equipment nameplates and drawings.

4.11.1 Hetch Hetchy Water Upcountry Communication Sites Description. HHWP’s communication sites interconnect water transmission assets, hydroelectric assets, electric transmission assets, and common infrastructure. There are currently 27 relevant microwave radio sites in the HHWP communication system. The communication system begins at O’Shaughnessy Dam in Yosemite National Park and extends southwest to Calaveras Substation near Sunol and the San Antonio Reservoir.

A series of Upcount ry communication sites support the communication system; their sole function is to connect the assets described elsewhere in this report. They are:

Moccasin Peak Communication Site
Mt. Allison Communication Site
Burn Out Ridge Communication Site
Cherry Tower Site
Intake Radio Site
Poopenaut Pass Radio Site
Condition. These assets are in fair condition and fit for service; however, reliability can be improved by (1) replacing obsolete equipment with readily available and supported equipment; (2) constructing a backup fiberoptic path between Moccasin Control and Warnerville Switchyard; and (3) increasing spare parts inventories. Also, given the age of the microwave tow ers, a condition assessment of the lattice steel structures and foundations is recommended.

4.11.2 Radio
The WE current two-way radio system is made up of three separate radio systems, using different frequencies, and spans seven counties. Communication with field staff relies on three separate dispatch centers, vehicle- mounted radios, hand -held radios, and vehicle -mounted repeaters.

These legacy systems have exceeded their life expectancy, have incomplete coverage, and lack Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  159 many features needed in today’s utility business. This presents a challenge to maintain efficient operations and poses a safety risk when crews are working in locations where communications are unreliable. A project is underway to replace the legacy systems with a Project 25 standard, digital, modern, trunked (system selects the channel), Motorola high-band radio system. The new system will significantly improve coverage. This system will be fully integrated with, and be technically part of, the Department of Emergency Management’s radio system. Once the project is complete in 2024, all SFPUC staff (along with most of CCSF staff) will be on the same radio system and technology, and operations outside of cellular coverage will be able to rely on radio as their primary means of communication.

It should be noted that cellular service reception is available in some areas. SFPUC staff continues to work with cell service providers to improve coverage by installing additional cell towers along RWS.

4.11.3 Telephone
SFPUC’s telephone systems prim arily use Virtua l Private Networks through AT&T, using the Avaya platform. These systems are used for daily business communications and are not considered reliable or available during or following a disaster. SFPUC IT Services is piloting Voice over Internet Communications for self -reliance and cost savings reasons. HHWP recently completed an upgrade, replacing old cables with networked VoIP systems running on a fiber backbone.

4.11.4 SCADA
SCADA systems continue to operate reliably and effectively, providing process automation, operational visibility, and remote control.

The Water SCADA system (which covers Regional and Local Water Operation) continued to be responsive and reliable in meeting the operational needs of RWS 24/7 . Upgrades to Water SCADA system hardware and software infrastructure focused on network reliability, performance, and security. Process automation, monitoring, and contro l continued to be enhanced at existing facilities throughout RWS. New processes and facilities were integrated into the Water SCADA system. Examples include the Ravenswood Water Quality Monitoring Station, the HTWTP Generator Control System Upgrade, the AEP PLC Upgrade, and process refinements to the Regional Groundwater Supply Recovery well sites.

HHWP uses OSI Monarch for managing power assets and Wonderware for the water assets. Both systems require hardware and software updates. In coordination with SFPUC IT Services, HHWP plans to update both systems to the OSI platform over the next 3 years, updating both software and hardware as needed. The system will continue to be compatible with the SFPUC systems.

4.11.5 On-Line Monitoring Program Review
In May 2021, SFPUC WE began a comprehensive review of its on -line water monitoring system for RWS. The project scope covered treated water remote monitoring SCADA sites from Moccasin Gate Tower down to the City’s terminal reservoirs. Treatment facilities were not included in the review. The objective was to review the current monitoring sites and parameters, and identify Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  160 recommendations to encourage sustainability, reliability, accuracy, and consistency. The draft study was delivered in January 2022 and identified 594 online sensors/signals at 81 remote monitoring locations in the treated system. There are seven regulatory sites and 22 operational monitoring sites with water-quality targets. Many sites are redundant and have been installed for purposes that are no longer needed. The study will continue through 2022 and will further review maintenance records/ needs, industry standards, travel time criteria, and emergency grab sampling capabilities, and make recommendations for the on-line monitoring system.

4.11.6 Capital Improvements
Regional Water currently has five active capital projects on its communications and monitoring assets, representing a total capital investment of more than $20 million. Those projects are:

RWS Microwave Backbone System (10015120)
Tesla/Thomas Shaft Microwave to SVCF and Radio Replacement (10015119) Radio Communication (10015118)
Additionally, Regional Water has multiple R&R projects that are smaller in scope and budget, and are reported annually. Summaries for each of the five active large capital projects are provided in the following sections.

RWS Microwave Backbone System (Approved Budget: $1.2 Million; Substantial Completion:
2032)
Scope. The RWS Microwave Backbone System project is a repair and replacement project. There have been no additional capital improvements identified in this cycle of the capital program for this project. The remaining $835,468 from this project were to be reallocated to the Tesla/Thomas Shaft Project. Any additional work related to this project and related facilit ies will be combined with and funded from the Tesla/Thomas Shaft Microwave Communications Network project.

Milestones Completed During the Reporting Cycle . There are no milestones associated with this project during this reporting cycle. This project was completed in February 2018, during the FY17/18 reporting cycle. The remaining balance was $835,468.

Tesla/Thomas Shaft Microwave to SVCF and Radio Replacement (Approved Budget:
$7.6 Million; Substantial Completion: 2032)
Scope. This project ( 1) includes the expansion of the SFPUC microwave network to include the Thomas Shaft facility and surrounding area for security, radio communications, and SCADA;. (2) may also include the development of intermediate radio sites required to reach Thomas Shaft, or may require the installing one 160-foot communications tower; (3) requires the purchase and installing microwave backbone network equipment with a replacement cost of $1.0 million in 10 years); and ( 4) requires the purchase and installing a radio repeater for the Thomas Shaft Facility and surrounding area.

Milestones Completed During the Reporting Cycle. No milestones related specifically to this project were completed during this reporting cycle.

Section 4 – Asset Description, Maintenance and Condition, and Capital Improvements 2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  161 Radio Communication (Approved Budget: $11.3 Million; Substantial Completion: 2032) Scope: The radio project replaces three WE low-frequency land mobile radio systems. The low- band radio systems are antiquated and no longer supported by the manufacturer. The goal of this project is to provide one unified interoperable land mobile radio system for business and emergency communications. CDD’s, WSTD’s and HHWP’s l ow-band radio communicat ion systems will be replaced with one public safety high-band (800 MHz, P25) radio system.

Milestones Completed During the Reporting Cycle. The project achieved multiple milestones during this reporting cycle, as summarized in Table 4-141.

Table 4-141: Radio Communication Milestones Completed During the Current Reporting Cycle Milestone Date Complete
Site Lease – Cedar Ridge September 11, 2020
Microwave Design Completed August 6, 2021
Environmental – NEPA Reviews March 25, 2022
Note:

NEPA = National Environmental Policy Act
Summary of Levels of Service Impacts
LOSs that are supported by the communication system capital improvements are provided in Table 4-142.

Table 4-142: Communication System Projects – Levels of Service Impacts Project
Level of Service
Drinking
Water
Quality
Regional
Seismic
Reliability
Regional
Delivery
Reliability
In-City
Seismic
Reliability
In-City
Delivery
Reliability
Water
Supply
Environ.

Steward.

Sustain-
ability
RWS Microwave Backbone
System 
Tesla/Thomas Shaft
Microwave to SVCF and
Radio Replacement

Radio Communication 
WSTD Security System R&R 
Regional SCADA PLC
Upgrades 
Notes:

PLC = programmable logic controller
R&R = rehabilitation and replacement
RWS = Regional Water System
SCADA = supervisory control and data acquisition
SVCF = Sunol Valley Chloramination Facility
WSTD = Water Supply and Treatment Division
Section 5 – Regulatory Compliance
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  162

5. Regulatory Compliance
SFPUC is required to comply with federal and state regulations. This section will cover requirements applicable to the RWS assets. All federal and state primary drinking water standards were met within the RWS in the reporting period.

5.1 Federal and State Drinking Water Regulations
SFPUC tracks a variety of regulatory measures associated with O& M activities to ensure compliance. In addition to complying with the existing regulatory requirements, SFPUC has also been keeping track of, and actively involved in, the regulatory development of drinking water regulations at the federal and state levels. These include long-term revisions of the federal Lead and Copper Rule (the Lead and Copper Rule Revision, or LCRR); revisions of the state perchlorate maximum contaminant level (MCL) and Lead and C opper Rule; the state’s revised MCL for hexavalent chromium; the state’s proposed monitoring of microplastics in drinking water ; and per- and polyfluoroalkyl substances (PFAS) regulations that may have impacts on RWS operations.

SFPUC maintains various emergency response plans related to drinkin g water regulations.

Emergency response plans maintained by SFPUC are included in Appendix B, Table B-2.

5.1.1 LCRR
In January 2021, the United States Environmental Protection Agency (U.S. EPA) adopted the LCRR, which became effective starting on Dec ember 16, 2021. The LCRR includes a suite of actions requiring water systems to further reduce lead exposure to customers through drinking water. It emphasizes six key areas: identifying the most impacted area; strengthening treatment requirements; replacing lead service lines; increasing sampling reliability; improving risk communication; and protecting children in schools. A new lead “trigger level” of 10 parts per billion (ppb), in addition to the current lead Action Level of 15 ppb, will require additional actions to be taken by water systems for corrosion control treatment. However, based on U.S. EPA’s mandated review of the LCRR under Executive Order 13990 in June 2021, and its subsequent conclusions in December 2021, the agency will take additional steps to strengthen the regulatory framework on lead in drinking water. U.S. EPA anticipates finalizing the Lead and Copper Rule Improvements, which are intended to improve t he rule s supporting the overarching goal s of proactively removing lead service lines and more equitably protecting public health. Although RWS is mainly a water wholesaler operating a complicated network of transmission pipelines and treatment facilities, there are some existing retail customers who are directly connected to the transmission pipelines. An evaluation of the service lines on the customer side will have to be performed, and, if identified, any lead user service lines on the customer side will have to be replaced according to the LCRR. In the meantime, SWRCB is also working on the revision of its own version of the LCRR to align with requirements of the federal LCRR ; this may possibly include additional requirements.

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San Francisco Public Utilities Commission November 2022  163

5.1.2 Total Coliform Rule
SFPUC conducts approximately 160 total coliform tests each month in RWS. RWS has always complied with the total coliform treatment technique (<5 percent positive tests) and E. coli MCL in accordance with the California Revised Total Coliform Rule. Total coliform positive tests are typically very low (0 to 1 percent). Over multi -year periods, there can be localized areas with increased coliform positive rates. When this occurs, an investigation is conducted, and any appropriate corrective actions are taken. If wholesale customers are impacted, they are included in the investigation. Corrective actions generally focus on the sample site or a very specific area.

5.1.3 Per- and Polyfluoroalkyl Substances
In September 2019, Governor Newsom signed Bill Assembly Bill 756 into law . This required a public water system under a SWRCB order to report monitoring results for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate ( PFOS), two PFAS compounds, to the state and to provide public notifications , as prescribed in the bill. The previously adopted drinking water notification and response levels for PFOA and PFOS were reduced further by SWRCB in February 2020. In March 2021, SWRCB established drinking water notification and response levels for perfluorobutane sulfonic acid (PFBS). In June 2022, U.S. EPA issued interim updated drinking water health advisories for PFOA and PFOS that replace the 2016 level. At the same time, U.S. EPA issued final health advisories for two other PFAS , namely PFBS and hexafluoropropylene oxide (HFPO) dimer acid and its ammonium salt (known as “GenX chemicals"). In July 2022, DDW proposed notification and response levels for p erfluorohexane sulfonic acid (PFHxS), which is another member of the PFAS group.

In March 2019, SWRCB ordered select airports and landfills to investigate any impacts to nearby groundwater drinking sources and to determine whether PFAS is present. SWRCB has issued similar orders regarding PFAS monitoring at various industrial locations, urban wildfire areas, wastewater treatment facilities, and drinking water wells near these locations. SWRCB has not ordered a PFAS investigation to other community water systems, including RWS . However, to assess the presence and extent of PFAS in their sources of water supply, SFPUC proactively and voluntarily monitored for PFAS in its RWS sources at several sites —seven surface water reservoirs, AEP, TTF intake, SVWTP effluent, and HTWTP effluent—between August 2019 and February 2020. At each location, 18 different PFAS compounds were analyzed using the contemporarily available method (Method 537.1) approved by U.S. EPA and SWRCB. The monitored compounds included PFOA and PFOS. Samples were collect ed by SFPUC’s experienced staff, following the very stringent sampling protocols established by SWRCB. These monitoring results confirmed at all RWS locations that there were no PFAS detections.

Upon completion of the first -round, voluntary PFAS monitoring indicated above—and in the absence of mandatory monitoring requirements from SWRCB—SFPUC conducted another round of voluntary PFAS monitoring for RWS using the newer analytical method (Method 533) approved by U.S. EPA. The new method mainly targets 25 short-chain PFAS contaminants. As of today, SFPUC completed two rounds of voluntary PFAS monitoring for RWS, including the eight Phase 1 RGSR wells. All results were nondetects.

Section 5 – Regulatory Compliance
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San Francisco Public Utilities Commission November 2022  164 In December 2021, U.S. EPA published its UCMR5. RWS has been directed to sample and analyze for the required 29 PFAS contaminants, using a combination of approved Methods 537.1 and 533.

RWS is scheduled for UCMR5 monitoring in CY2023.

5.1.4 Unregulated Contaminant Monitoring Rule
Every 5 years, U.S. EPA issues a list of unregulated contaminants to be monitored by public water systems. In the Fourth Unregulated Contaminant Monitoring Rule ( UCMR4) four-quarter monitoring completed in January 2019, SFPUC found quinoline, a coal-tar lining derivative, at the point of entry into the SFWS at Baden Valve Lot, at LMPS, and at the outlet at Sunset Reservoir.

Although SFPUC has terminated the use of coal-tar in its repair and replacement program, there are still existing pipelines containing this type of lining. Replacing all these linings will require significant effort that can only be done over a longer period. The CSPL No. 2 Reach 5 Rehabilitation Project is currently in planning phase . Its scope includes removing 3.8 miles of coal tar enamel (CTE) lining and replacing it with CML in the existing 60- inch WSP between Millbrae Yard and Baden Valve Lot. This project is expected to be completed by 2025. The project AAR recommended using the water jetting (WJ) nonabrasive surface cleaning method to remove the existing CTE lining, with performance standard WJ-1 or WJ-2 as a minimum standard requirement before repairs and relining with CML. WJ-1 will remove existing lining to a matte finish without any visible foreign matter; WJ-2 will remove existing lining until there are stains/residues on less than 5 percent of the surface area. Given tightening regulatory requirements, and to minimize CTE leaching potential, SFPUC is planning to proceed with the WJ-1 cleaning method. Also, the CSPL No. 2 Reaches 2 and 3 Rehabilitation Project is in the planning phase; it includes replacing and relining sections of CTE- lined 60-inch WSP over approximately 2.5 miles, stretching between CSPS and the Bellevue Valve Lot. This is expected to be completed by 2026. The upcoming Fifth Unregulated Contaminant Monitoring Rule ( UCMR5) will require monitoring of 30 contaminants, of which 29 are PFAS contaminants. SFPUC completed two rounds of voluntary PFAS monitoring between 2019 and 2022 and found no detections in the surface and ground water sources. However, with the advancement of analytical methods, future detection limits will be further lowered; this may present challenges to SFPUC regarding the existing nondetection status.

5.1.5 Other Revisions
In May 2021, SWRCB lowered the perchlorate detection limit for purposes of reporting (DLR) by half, and will reduce it by another 50 percent in January 2024. In the meantime, SWRCB is evaluating whether the perchlorate MCL would be revised. This may affect and incur changes to the existing RWS treatment should a much lower MCL be adopted by SWRCB in the future.

SWRCB is c urrently in the process of revising its MCL for hexavalent chromium, which was previous withdrawn on Sept ember 11, 2017, in response to a State Superior Court decision. A new, much lower detection limit has been proposed for chromium (VI) . This, together with the new MCL, is expected to have impacts on the RGSR well operations, although new treatment facilities may not be needed.

On July 27, 2020, SWRCB adopted a definition of “microplastics in drinking water,” in accordance with the requirements of Senate Bill No. 1422, which was incorporated as §116376 of California Health and Safety Code. Upon its adoption of the standard method of analysis and a policy Section 5 – Regulatory Compliance
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  165 handbook for microplastics monitoring, SWRCB will require public water systems, probably including RWS, to monitor and report microplastics in drinking water. Although the potential impacts of the definition and monitoring resu lts of microplastics on the treatment operations at RWS are uncertain at this time, SFPUC will closely monitor and track the regulatory development and participate in the monitoring efforts to ascertain the extent, if any, of microplastics in RWS’s water sources and treated water.

U.S. EPA’s microbial/disinfection byproducts (M/DBP) Stage 3 proposal is due in June 2024. All current regulations are open to review, including filtration avoidance requirements. The drinking water industry could see new regulations for NDMA, other DBP s, Legionella, etc. U.S. EPA is undertaking four grant projects , totaling $8.5 million, to obtain occurrence/treatment/system data. SFPUC has been asked to participate in at least two proposals. SFPUC is also part of the Water Research Foundation ( WRF) 5156 Legionella occurrence data collection project (meant to inform the M/DBP Stage 3 proposal), with monitoring starting in August 2022. SFPUC’s Millbrae Lab has developed internal Legionella testing capability for this project.

5.1.6 Drinking Water Permit Compliance
SWRCB DDW is responsible for implementing and enforcing drinking water regulations in California. SFPUC tracks a variety of regulatory measures associated with O&M activities to ensure compliance, including the drinking water system permit administered by the SWRCB DDW. All federal and state primary drinking water standards were met within the RWS in the reporting period (FY21 and FY22).

5.2 Environmental Compliance
The WE Environmental Stewardship Policy provides direction for the management of the lands and natural resources that affect or are affected by operations of SFPUC, and this policy includes complying with federal and state environmental regulations. Environmental compliance is also an objective of the Environmental Stewardship Policy goal under the Water Syste m LOS, and reduces risk associated with uncertainty related to water supply reliability. T he Environmental Stewardship Policy is the responsibility of all WE employees, and training is a critical aspect of providing staff with the information necessary to meet this goal. The specific Environmental Stewardship Policy strategies are incorporated into the regular tailgate trainings performed for WE staff, based on their work assignments and locations, to ensure that staff receive this information as part of th eir regular responsibilities. WE also submits a report to SFPUC every 2 years, summarizing the implementation of the Environmental Stewardship Policy. The most recent report was submitted at the June 23, 2020, meeting.

The SFPUC’s environmental compliance starts with impact avoidance. SFPUC activities are reviewed and modified as n eeded to incorporate BMPs and environmental impact avoidance measures whenever feasible. When impacts cannot be avoided, permits are obtained to comply with environmental laws and regulations, such as the California Fish and Game Code, the Clean Water Act, and the California and federal Endangered Species Acts. San Francisco’s Planning Department prepares any necessary California Environmental Quality Act documentation, and SFPUC oversees the compliance with the requirements of these documents. If a project triggers compliance with federal regulations, NRLMD works with the federal lead agency to prepare any required National Section 5 – Regulatory Compliance
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  166 Environmental Policy Act documents. Applications for third-party use of SFPUC-owned watershed and ROW lands are also evaluated for environmental compliance and consistency with SFPUC plans and policies through the Project Review process. SFPUC regularly evaluates environmental compliance procedures and protocols to streamline the processes and ensure that they are consistent across the system. Environmental compliance for O&M activities is documented through Maximo, in coordination with HHWP and WSTD maintenance planning teams, and the Project Review process; larger projects maintain separate project-specific records of environmental compliance.

The SFPUC’s environmental regulatory compliance includes the fulfillment of the mitigation commitments from WSIP. These WSIP commitments include monitoring and maintenance of the Bioregional Habitat R estoration (BHR) projects ; permit-required releases and bypass flows to benefit aquatic species below SFPUC dams and diversion structures; and amphibian and fish monitoring in Alameda and San Mateo c reeks. The BHR includes approximately 2,000 acres of lands set aside in perpetuity on the Alameda and Peninsula watersheds that must be maintained and monitored to meet specific environmental performance measures, as well as conservation bank credit purchases in the San Joaquin Valley. Support for the BHR effort was initially funded by WSIP bond funds; in recent years, this has been increasingly supplemented by CIP bond and programmatic funds. This will continue, and CIP funds will be used to cover costs until an endowment can be established and the BHR effort can become self-sustaining.

SFPUC environme ntal permitting and compliance efforts include r outine maintenance agreements and lake and streambed alteration agreements with the California Department of Fish and Wildlife; permits for compliance with Sections 401, 402, and 404 of the Clean Water Act; California Air Resources Board permits ; compliance with hazardous materials regulations; and federal special use permits with the NPS, USFS, and the Bureau of Land Management.

5.2.1 National Pollutant Discharge Elimination System Permit Compliance In 2016, the NPDES statewide drinking water discharges p ermit ( NPDES p ermit number CAG140001) went into effect, and SFPUC received coverage on January 20, 2016. This p ermit replaced the individual permit for the Pulgas Dechloramination Facility, and the General NPDES permit for s urface water treatment facilities. Coverage under this statewide p ermit is comprehensive, because it includes chlorinated drinking water as well as groundwater, and spans the entire RWS from Hetch Hetchy to CCSF ’s county line. Also in 2016, filter backwash discharges at HTWTP were covered under a new NPDES permit ( NPDES p ermit number CAG382001). In 2021, this NPDES permit was reissued, and it continues to provide coverage for filter backwash discharge s at HTWTP. SFPUC continues to receive coverage for discharges of aquatic pesticides (i.e., algaecides) into drinking water reservoirs under the g eneral aquatic pesticide application permit (NPDES permit CA990005). The SFPUC NPDES permit coverage is provided by these three NPDE S permits, and SFPUC cont inues to work with the state and regional boards to meet permit requirements and minimize impacts to receiving waters.

5.2.2 California Unified Program Compliance (Hazardous Waste and Materials)
The Unified Hazardous Waste and Hazardous Materials Management Regulatory Program (Unified Program) was established in 1993 to protect public health and safety, and to restore and Section 5 – Regulatory Compliance
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  167 enhance environmental quality. The Unified Program i s overseen by the California Environmental Protection Agency (CalEPA), coordinating with partner state agencies to ensure consistency and to set program standards established by Cal OES, the Department of Toxic Substances Control, the Office of the State Fire Marshal, SWRCB, and CalEPA. The Unified Program organizes the administration and activities of six programs:

1. Aboveground Petroleum Storage Act Program

2. California Accidental Release Prevention Program

3. Hazardous Materials Business Plan Program

4. Hazardous Materials Management and Inventory Program (Generator Program)

5. Hazardous Waste and Hazardous Waste Treatment Program (Tiered Permitting)

6. Underground Storage Tank Program
Water treatment plants are overseen by the following programs: Aboveground Petroleum Storage Act ( Table 5-1), California Accidental Release Prevention Program ( Table 5-2), and Hazardous Generator or Hazardous Material Business Plan Program (Table 5-3). The majo rity of the pump stations, valve lots, and smaller facilities are overseen by the Hazardous Materials Business Plan Program, Hazardous Waste Generator Program, and Underground Storage Tank Program. Table 5-4 shows the various facilities and the different programs responsible for oversight of the facilities.

Table 5-1: Facilities in the Aboveground Storage Tank Program Facility Name Last Revised
Early Intake 2021
Moccasin 2021
Warnerville 2022
Baden Pump Station 2021
Harry Tracy Water Treatment Plant 2021
San Antonio Pump Station/Sunol Valley Chloramination Facility 2021 Santa Clara Valley Intertie Pump Station 2021
Sunol Valley Water Treatment Plant 2021
Tesla Treatment Facility 2022
Millbrae Yard 2022
Sunol Corporation Yard 2020

Table 5-2: Facilities in the California Accidental Release Prevention Program Facility Name Last Revised
Harry Tracy Water Treatment Plant 2020
San Antonio Pump Station/Sunol Valley Chloramination Facility 2021 Sunol Valley Water Treatment Plant 2021
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San Francisco Public Utilities Commission November 2022  168 Table 5-3: Facilities in the Hazardous Generator and Hazardous Material Business Plan Program Facility Name Last Revised
O’Shaughnessy 2021
Cherry Valley Compound 2021
Early Intake 2021
South Fork Maintenance Yard 2022
Moccasin 2021
Rock River Lime Plant 2022
Warnerville 2022
Harry Tracy Water Treatment Plant 2022
Millbrae Maintenance Yard 2022
Baden Pump Station 2022
Crystal Springs Pump Station 2022
Pulgas Dechloramination Facility and Pump Station 2022
Polhemus Fluoride Station 2022
Tesla Treatment Facility 2022
San Antonio Oxygenation Facility 2022
Sunol Valley Chloramination Facility/San Antonio Pump Station 2022 Sunol Valley Water Treatment Plant 2022
Casey Quarry 2022
Crystal Springs Bypass Tunnel and Shaft 2022
SFPUC-Valley Water Intertie Pump Station 2022
Thomas Shaft Facility 2022
Sunol Corporation Yard 2022
Calaveras Oxygenation Facility 2022
Bear Gulch Crossover Facility 2022
Mt. Alviso Valve Lot 2022
Calaveras Valve Lot 2022
Guadalupe Crossover 2022
Palo Alto (Barron) Valve Lot 2022
Newark Control Building 2022
Irvington Portal 2022
San Pedro Valve Lot 2022
Ravenswood Control Building 2022
Alameda East Portal 2022
Alameda West Portal 2022
F Street Well and Treatment Facility 2022
Drive Well and Treatment Facility 2022
Serramonte Boulevard Groundwater Treatment Facility 2022 Hickey Boulevard Well and Treatment Facility 2022
Mission Well and Treatment Facility 2022
Southwood Drive Well and Treatment Facility 2022
Millbrae Yard Well and Treatment Facility 2022
Sunol Fire Pump Station 2022
Alameda Creek Diversion Dam Fish Passage Facility 2022
Pulgas Valve Lot 2022
Note:

SFPUC = San Francisco Public Utilities Commission
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San Francisco Public Utilities Commission November 2022  169 Table 5-4: Number of SFPUC Division Facilities Enrolled in the Unified Program Type of Program in the Unified Program
Number of Facilities in
the Program
Aboveground Petroleum Storage Act Program 11
California Accidental Release Prevention Program 3
Hazardous Materials Business Plan Program 44
Hazardous Materials Management and Inventory Program (Generator Program)
39 Hazardous Waste and Hazardous Waste Treatment Program (Tiered Permitting)
2 Underground Storage Tank Program 1
Note:

SFPUC = San Francisco Public Utilities Commission
Certified Unified Program Agencies implement the Unified program at the local level by consolidating and coordinating administrative requirements, permits, inspections, and enforcement activities for the six programs. Depending on the location of the facility, the Certified Unified Program Agencies for WSTD include San Joaquin County Department of Environmental Health, Alameda Department of Environmental Health, Santa Clara Department of Environmental Health, City of Sunnyvale, and San Mateo Environmental Health Services.

WSTD facilities either carry hazardous materials over a certain threshold or generate hazardous waste, which puts these facilities under the Unified Program. For example, hazardous materials at some of the WSTD facilities include aqua ammonia, ammonium sulfate, fluoride, sodium bisulfite, sodium hydroxide, petroleum products, and cylinders of gases (i.e., oxygen, argon, carbon dioxide, and nitrogen). Hazardous materials at pump stations and valve lots may include propane or diesel generators. Hazardous waste generated at the pump stations and valve lots include the used oil from the generators. The goal of the Unified Program is to protect lives, property, and the environment by reducing the factors that contribute to emergencies associated with hazardous materials.

WSTD complies with the Unified Program to protect the staff, customers, community, and environment from adverse effects as a result of the storage or possible release of hazardous materials and waste. This is done primarily by documenting significant amounts o f hazardous materials so that emergency responders can effectively protect the public. WSTD continuously updates their plans to ensure regulatory compliance with the Unified Program by working with the local Certified Unified Program Agencies.

Similarly, HHWP continuously updates their plans to ensure regulatory compliance with the Unified Program. HHWP must maintain various permits/plans/procedures for their operations, including wastewater permits, discharge permits, Stormwater Pollution Prevention Plans , and Hazardous Materials Business Plans. Permitting is current and up to date. All hazardous material/waste permits are captured in California’s Environmental Reporting System. CalEPA oversees California’s Unified Program. The Unified Program is a cons olidation of multiple environmental and emergency management programs. Under the Clean Water Act, U.S. EPA Section 5 – Regulatory Compliance
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San Francisco Public Utilities Commission November 2022  170 authorizes the NPDES permit program to state, tribal, and territorial governments, enabling them to perform many of the permitting, administrative, and enforcement aspects of the NPDES program. California is authorized to implement Clean Water Act programs through SWRCB; CalEPA retains oversight responsibilities over SWRCB, whi ch administers wastewater and stormwater discharge permits. HHWP also mainta ins small water systems p ermits and operations plans for facilities at Moccasin, Early Intake, O’Shaughnessy, and Cherry Valley.

A comprehensive list SFPUC program plans for can be found in Appendix B, Table B-2.

Emergency response plans maintained by SFPUC can be found in Appendix B, Table B-1.

5.3 State of California Division of Safety on Dams
DSOD has jurisdiction over 12 dams that are operated and maintained by HH WP and WSTD within the SFPUC’s WE. The dams that are regulated by DSOD include:

O’Shaughnessy Dam
Lake Eleanor Dam
Cherry Valley Dam
Early Intake Dam
Priest Dam
Moccasin Dam
Calaveras Dam
Turner Dam
Pilarcitos Dam
Upper and Lower Crystal Springs Dams
San Andreas Dam
DSOD categorizes the condition of each of these dams within its jurisdiction as either Satisfactory, Fair, Poor, Unsatisfactory, or Not Rated.
• Satisfactory: No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, and seismic), in accordance with the applicable regulatory criteria or tolerable risk guidelines. • Fair: No existing dam safety deficiencies are recognized for normal loading conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Additional DSOD criteria may include:
— The dam has a long-standing deficiency that is not being addressed in a timely manner. — The dam is not certified and its safety is under evaluation. — The dam is restricted and operation of the reservoir at the lower level does not mitigate. • Poor. A dam safety deficiency is recognized for loading conditions that may realistically occur. Remedial action is necessary. A poor rating may also be used when uncertainties exist regarding critical analysis parameters that identify a potential dam safety deficiency. Further investigations and studies are necessary. Additional DSOD criteria can include the following:
— The dam has multiple deficiencies or a significant deficiency that requires extensive remedial work.
• Unsatisfactory. A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.

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San Francisco Public Utilities Commission November 2022  171 • Not Rated . The dam has not been inspected, is not under state jurisdiction, or has been inspected but, for whatever reason, has not been rated.

WE has identified the need for capital improvements on its dams and continues to work closely with DSOD on the scope and schedule for these investments. As reported in the previous SRWS Report, SFPUC deli vered to DSOD a conceptual plan for implementing known dam safety projects over the next 15 years, the 15-Year Dam Safety Plan. DSOD has reviewed and responded favorably to the conceptual plan. SFPUC continues to make progress on the dam safety projects that are currently authorized under the existing 10-Year CIP.

In addition to the large capital projects that were identified in the 15- year Dam Safety Plan, WE manages a thorough dam safety program that includes inspection, surveillance, and monitoring tasks for each of its facilities. This program is executed by a diverse set of dam safety professionals, including engineers, watershed keepers, hydrologists, and other technical staff.

5.3.1 Dam Safety Program
The Dam Safety Program includes (1) field inspection and m onitoring activities , (2) valve exercising, and (3) vegetation management.

5.3.1.1 Field Inspections and Monitoring
Field inspections consist of routine inspections, formal annual inspections, and episodic inspections, accompanied by engineering surveys following seismic events of specified magnitude.

Routine inspections are conducted by SFPUC staf f, including engineering survey crews and watershed keepers. Staff record readings on piezometers and seepage drains, and also perform routine visual inspection of spillways and appurtenances. The survey crew conducts a routine dam displacement survey on monuments for vertical and horizontal movements.

Annual inspections are conducted by the DSOD inspector, together with the SFPUC inspection team. DSOD inspects the upstream and downstream face of the dam, the crest and toe areas of the dam, groins, seepage points, spillways, spillway basins, outlet structures, tunnels, valves, piping, and metalwork. The DSOD inspector typically observes the exercising of outlet valves once every 3 to 5 years. DSOD issues a written report to SFPUC afte r each annual inspection to summarize their findings and recommendations. As part of their annual report, DSOD reviews monitoring data, such as piezometers, deflection and settlement surveys, and seepage monitoring. Annual inspections were performed by DSOD in FY21 and FY22.

At HHWP, monitoring data are collected manually during the routine monthly inspection and the bi-annual engineering survey. At WSTD, monitoring data are collected through both manual reading on site and through dataloggers with data transmitted to the office. The monitoring data include piezometer readings, seepage flows, survey readings, reservoir levels, and rainfall information. Piezometer readings, reservoir levels, and rainfall data are plotted over a 10- year period to identify trends. Piezometer readings, which represent water pressure, are labeled on each dam cross -section to illustrate the internal phreatic surface. S urvey readings that show horizontal and vertical movement are summarized in a tabular format with a 1 0-year history.

Monitoring data are a central element in the reports submitted to DSOD each year. Maintenance Section 5 – Regulatory Compliance
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San Francisco Public Utilities Commission November 2022  172 and repair consist of annual flushing of piezometer piping and DSOD annual inspection recommendation follow-ups. Flushing of hydraulic p iezometer piping is required to maintain proper operation. DSOD annual inspection recommendation follow -ups generally consist of vegetation clearing, rodent control, minor spillway repair, and repair of seepage measuring devices. These activities are inclu ded in the operating budget. Inspections and engineering surveys are required following an earthquake, depending on the magnitude of the earthquake and its proximity to the dam. For WSTD , the inspection and survey criteria are specified in the EAPs for eac h dam. These surveys are conducted immediately or during the next available daylight period. The EAPs are required by law to be updated annually or whenever changes are made. For HHWP , criteria are specified in HHWP’s Earthquake Notification Procedure. No earthquakes triggering surveying have been experienced on the HHWP project recently.

5.3.1.2 Maintenance – Valve Exercising
WSTD’s valve exercising program requires exercising adit and emergency release valves for each dam once per year. Every 3 to 5 year s, DSOD inspectors, along with a WSTD engineer and inspector, will need to witness the valve exercising for each dam. A wet test with all the valves fully opened and closed is preferred. When environmental restrictions prevent the full release of water downstream (as was the case for Turner Dam and LCSD), a dry test will be done by opening and closing the emergency release valves with the adit valves and line -valves closed (thus not allowing any water to go downstream). After testing, the emergency release valve is then closed, and the adit valves and line valves are opened and closed.

HHWP’s program requires exercising the release valves for each dam once per year. This activity is scheduled in Maximo and performed by the watershed keepers. At least once every 3 years, DSOD inspectors, along with a HHWP engineer and inspector, witness the valve exercising for each dam. Though a wet test with all the valves opened is preferred, a dry test will be done (not allowing any water to go downstream) during dry hydrologic conditions. Valve exercising tasks for each dam are summarized in Section 4.

5.3.1.3 Maintenance – Vegetation Management
SFPUC and DSOD inspections regularly trigger vegetation and rodent clearance work along dams and spillways. W ork is transmitted to the maintenance crews f or completion either by memorandum from the engineering section (WSTD) or by Maximo work order (HHWP) .

Vegetation work completed is summarized for each dam in Section 4.

5.3.2 DSOD Inspections
During this reporting cycle, DSOD performed joint inspections with WE staff at multiple dams.

This section summarizes the dates of the inspections, the current DSOD condition category, and a brief description of the findings of the inspection for each of the dams.

5.3.2.1 O’Shaughnessy Dam
DSOD categorizes the condition of O’Shaugh nessy Dam as “Satisfactory.” HHWP personnel performed joint inspections with DSOD at O’Shaughnessy Dam on November 16, 2020; April 20, 2021; April 19, 2022; and May 12, 2022. This included exercising valves, exercising drum gates , and performing visual inspections of the dam. Inspections went well, confirming the satisfactory Section 5 – Regulatory Compliance
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  173 condition of the dam; however, some minor maintenance items were identified and are being addressed.

5.3.2.2 Cherry Valley Dam
DSOD categorizes the condition of Cherry Val ley Dam as “Satisfactory.” HHWP personnel performed joint inspections with DSOD at Cherry Valley Dam on April 21, 2021; and May 13, 2022. This included exercising valves and performing visual inspections of the dam. Inspections went well, confirming the satisfactory condition of the dam. However, the weirs are nonstandard and the readings are somewhat suspect and in need of replacement, which is currently being planned. Earlier, in 2020, the DSOD inspector recommended vegetation removal at the groins. In the 2021 and 2022 inspections, t he DSOD inspector noted that this issue continues to be successfully addressed.

5.3.2.3 Eleanor Dam
DSOD categorizes the condition of Eleanor Dam as “Satisfactory.” HHWP personnel performed joint inspections with DSOD at Eleanor Dam on November 17, 2020; April 21, 2021; and May 13, 2022. This included exercising valves and performing visual inspections of the dam. Inspections went well, confirming the satisfactory condition of the dam; however, some maintenance items were identified. DSOD has been requesting the repair of the spillway bays, diversion wall , and some minor repairs to the upstream right abutment contact for years now. This is being addressed by HHWP’s O&M staff but has not been completed due to staffing shortages. This work is also experiencing ongoing delay due to the current condition of the access bridge across the dam , which is limiting access for the concrete needed to make the repairs or contract this work out.

Progress continues to be made, although not as quickly as DSOD would prefer.

5.3.2.4 Priest Dam
DSOD categorizes the condition of Priest Dam as “Satisfactory.” HHWP personnel performed joint inspections with DSOD at Priest Dam on March 16 , 2021; and February 17, 2022. This included exercising valves, performing visual inspections of the dam, and reviewing the blasting monitoring measures associated with the new Mountain Tunnel Adit and A ccess Shaft.

Inspections went well, confirming the satisfactory condition of the dam. DSOD provided positive comments regarding the new standardized weirs and cutoff wall installed by HHWP , which improves SFPUC’s ability to monitor the leakage from the dam and low lev el out let tunnel.

During the inspection, DSOD requested additional monitoring stations by and on the dam , for more accurate effects of construction and blasting work. The contractor for Mountain Tunnel installed the additional monitoring under the direction of DSOD.

5.3.2.5 Moccasin Dam
DSOD categorizes condition rating as “Fair,” and the rating will not be increased until the pending capital work on its spillway is complete. HHWP personnel performed joint inspections with DSOD at Moccasin Dam on March 16 , 2021; February 17, 2022; and May 17, 2022. This included exercising valves and perfuming visual inspections of the dam. Inspections went well, confirming the satisfactory condition of the dam. However, DSOD is still awaiting a proposal for improvements to the spillways of Moccasin Lower Dams ; this is needed to address the revised Probable Maximum Flood (PMF) event, following the 2018 flood event that occurred in Moccasin.

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5.3.2.6 Early Intake Dam
DSOD categorizes the condition of Early Intake Dam as “Fair” due to the condition of the dam’s concrete. HHWP personnel performed joint inspections with DSOD at Early Intake Dam on March 16, 2021; February 17, 2022; and April 19, 2022. This included exercising valves and performing visual inspection s of the dam. I nspections went well , confirming the satisfactory condition of the dam; however, DSOD is still awaiting the proposal for a long -term solution for Early Intake Dam.

5.3.2.7 Calaveras
DSOD categorizes the condition of Calaveras Dam as “Satisfactory.” WSTD personnel performed joint inspections with DSOD at Calaveras Dam on October 30, 2020; November 13, 2020; December 16, 2021; and April 22, 2022. This included exercising valves and performing visual inspections of the dam , spillway, and outlet structure. I nspections went well , confirming the satisfactory condition of the dam; however, some maintenance items, such as vegetation removal and minor crack repairs, were identified and will be addressed.

5.3.2.8 Alameda Creek Diversion Dam
The Upper Alameda Creek Diversion Dam is not a DSOD jurisdictional dam. The dam is structurally sound. The recent WSIP project (2019) modified the dam under CDRP, adding a new fish passage ladder and screened intake into the diversion tunnel that leads to Calaveras Reservoir. Diversions through the Alameda Creek Diversion Tunnel (ACDT) to Calaveras Reservoir occurred in spring 2020. Downstream bypass flows have been provided, consistent with the permitting requirements.

5.3.2.9 Turner Dam
DSOD categorizes the condition of Turner Dam as “Satisfactory.” WSTD personnel performed joint inspections with DSOD at Turner Dam on June 12, 2020; October 30, 2020; December 16, 2021; and March 14, 2022. This included exercising valves and performing visual inspections of the dam , spillway, and outlet structure . I nspections went well , confirming the satisfactory condition of the dam. Maintenance items identified in the inspections include removal of woody vegetation in the stilling basin, repair of hillside erosion adjacent to the outlet structure access road, and collapsing of rodent holes. With the exception of repairing some hillside erosion, the rest of the maintenance items have been addressed.

5.3.2.10 Lower Crystal Springs Dam
DSOD categorizes the condition of Lower Crystal Springs Dam as “Satisfactory.” WSTD personnel performed joint inspections with DSOD at Lower Crystal Springs Dam on December 9, 2020; and December 14, 2021. This included exercising valves and performing visual inspections of the dam , spillway, and outlet structure. Inspections went well , confirming the satisfactory condition of the dam; however, maintenance issues such as vegetation removal and maintaining access to monitoring points were identified and are being addressed.

5.3.2.11 Upper Crystal Springs Dam
Although it crosses the San Andreas fault, no improvements to the dam are planned. The culverts conveying water into LCSR were repaired and strengthened under WSIP.

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5.3.2.12 San Andreas
DSOD categorizes the condition of San Andreas Dam as “Fair ,” due to major deficiencies in the spillway. WSTD personnel performed joint inspections with DSOD at San Andreas Dam on December 9, 2020; December 14, 2021; and December 15, 2021. This included exercising valves and performing visual inspections of the dam, spillway, and outlet towers. The spillway requires major upgrade, which is included in the CIP program. During inspection, an electrical issue was discovered in one valve, and rodent holes were observed. These issues are being addressed.

5.3.2.13 Pilarcitos
DSOD categorizes the condition of Pilarcitos Dam as “Satisfactory.” WSTD personnel performed joint inspections with DSOD at Pilarcitos Dam on December 9, 2020; December 15, 2021; and January 25, 2022. This included exercising valves and performing visual inspections of the dam, spillway, and outlet towers. Inspections went well , confirming the satisfactory condition of the dam; however, some maintenance items such as rodent holes and minor concrete cracks were identified and will be addressed.

5.3.2.14 Stone Dam
Stone Dam, downstream of Pilarcitos Reservoir, is in satisfactory structural condition. However, structural deterioration of the spillway access structure prevents operational use of its stop logs, and the reservoir storage capacity is severely limited due to sediment deposition and a lack of regular dredging.

5.4 America’s Water Infrastructure Act
SFPUC has conducted a risk and resilience assessment (RRA), as required by the America’s Water Infrastructure Act of 2018 ( AWIA). In October 2018, the AWIA was signed into law , requiring water utilities serving more than 3,300 persons to conduct an RRA and update their ERP, based on specific criteria outlined in the Act. The compliance deadline for SFPUC to complete their RRA was March 31, 2020; the ERP was due September 30, 2020. Both were completed, and certifications sent to U.S. EPA.

Pursuant to the AWIA requirements, SFPUC conducted an RRA to evaluate:
• risks to the system from malevolent acts and natural hazards; and • resilience of system components, in consideration of monitoring practices, financial infrastructure, chemical storage and handling, and O&M.

The RRA was completed using a methodical process based on the AWWA J-100 methodology:
• Asset Characterization. A list was established of SFPUC’s critical assets that, if compromised, could result in service interruption. Assets included the various source water, treatment, distribution, storage, and cyber assets associated with the drinking water system. AWIA applies only to drinking water systems; therefore, the wastewater and stormwater assets were not included in this effort.

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San Francisco Public Utilities Commission November 2022  176 • Threat Characterization. A set of hazard scenarios was identified, taking an all -hazards approach as required by AWIA, to evaluate credible threats to SFPUC. The threats included major earthquake, flood, wildfire, power outage, physical assault, water quality contamination, cyber-attack, and resource interruption. • Consequence Analysis. AWIA consequence of failure was identified for identified assets. • Vulnerability and Threat Analysis. The probability of failure was estimated for threat-asset pairs developed from the asset and threat characterizations. • Risk and Resilience Analysis. The results were combined into an estimated risk analysis for identified and evaluated threat-asset pairs.

RRA Summary
• Seismic: As part of the Facilities Reliability Program and WSIP, SFPUC performed an extensive multi-year evaluation of seismic risks to its water system ; this resulted in major capital improvements to increase seismic reliability. The LOS established post-earthquake delivery and recovery objectives under the following seismic scenarios: magnitude 7.9 event on the San Andreas Fault, magnitude 7.3 event on the Hayward Fault, and magnitude 6.9 event on the Calaveras Fault. For the seismic risk and resilience of AWIA compliance, SFPUC defers to the body of analysi s performed to support WSIP. The risks associated with the seismic scenarios considered are reflected in the delivery objectives established in the LOS.

Notwithstanding the numerous seismic improvements to the water system, delivery will be contingent upon resources and infrastructure available for restoration. • Flood: The flood hazard evaluation is based on the 100 -year flood scenario. The broadly accepted 100-year flood maps developed by the Federal Emergency Management Agency are used for this analysis, and the associated likelihood of occurrence is 1 percent annually. For the purposes of this assessment, the conservative assumption is that the operation of facilities in areas within the delineation of the 100-year flood will be impacted. • Wildfire: The wildfire hazard evaluation u ses California Department of Forestry and Fire Protection Fire Hazard Severity Zone (FHSZ) Map data to evaluate fire hazard at facility locations. The hazard mapping considers factors such as fuel, terrain, weather, fire history, expected fire behavior, and expected burn probabilities. The state’s FHSZ data do not reflect a probability of occurrence for wildfires ; however , over the last 30 years , California has experienced an average of more than 8,700 wildfires per , year burning an average of more than 570,000 acres (California State Hazard Mitigation Plan, September 2018). • Power Outage: The assessment of power outage risk evaluates the direct impact to operation of facilities in the event of a primary power outage due to public safety power shutoffs (PSPSs) and other causes. Given the California Public Utilities Commission ’s approval of P SPS guidelines as a preventative measure against imminent and significant fire risk, and the implementation of these procedures in 2019, it is reasonable to expect power outages to occur on a nearly annual basis.

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San Francisco Public Utilities Commission November 2022  177 • Physical Assault: The physical assault threat addresses scenarios of terrorist threat, sabotage, and/or vandalism on utility infrastructure or staff, as well as malicious physical acts with the intention of impacting facility operations. Depending on location and desirability, assets may be considered rare to unlikely targets.
• Source Water Contamination: The water quality contamination hazard/threat considers unintentional (e.g. , accidental, natural hazards, and other causes outside the control of SFPUC) and intentional (e.g., malevolent acts) contamination of raw and treated water. Water quality events, such as high turbidity events, may occur due to severe weather, fire, earthquake, etc. Events may affect Hetch Hetchy supply and source waters for SFPUC water treatment plants. Water treatment plant failure may occur due to process failure, such as filtration problems ; or contamination may occur at treated water storage facilities. The likelihood of occurrence is based on U.S. EPA’s Baseline Information on Malevolent Acts for Community Water Systems (July 2019).
• Cyber-Attack: This threat scenario addresses the potential for cyber -attack of business enterprise (e.g., financial or data management) and process control (e.g. , SCADA) systems.

Depending on asset dependencies such as telecommunications, the likelihood of occurrence range from possible to unlikely.
• Resource Interruption: Resource interruptions, such as major staff shortfalls and supply interruptions for critical consumables such as treatment chemicals, can potentially impact the operation of t he water system. These interruptions may result from events such as natural disasters, transportation incidents, civil disruption, or pandemic outbreaks. Due to the broad range of potential causes and impacts, the hazard will be addressed in a holistic man ner. A range of probabilities of occurrence is assigned depending on asset dependencies, and to reflect a conservative approach given the level of uncertainty.

Pursuant to AWIA requirements, SFPUC prepared an ERP that incorporates the findings of the RRA and describes SFPUC’s strategies, resources, plans, and procedures to prepare for and respond to an incident, natural or man -made, that threatens life, property, or the environment.

The SFPUC ERP acts as a unifying document and integrates and references common components of SFPUC plans and programs that have been developed to date, including but not limited to the SFPUC EOP and various division, bureau, and enterprise EOPs. Plans and procedures outlined and/or referenced in this document will be implemented to the extent required , depending on the type and severity of the major emergency or disaster. Types of events affecting SFPUC that may require the immediate, accurate, and coordinated use of emergency plans incl ude but are not limited to m ajor earthquake, loss of power, loss of water supply, major fire, hazardous material release that threatens water supply or environment, major pipeline breaks, dam break, and man-made or intentional acts of terrorism resulting i n damage to system or interruption of service.

SFPUC is required to review, revise, and submit a recertification of the RRA every 5 years. SFPUC will host AWIA discussion sessions with customers as needed (up to annually) to promote collaboration, and provide an opportunity to share compliance strategies, actions, and outcomes.

Sessions to date were hosted in October of 2020 and August of 2022.

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5.5 Federal and State Power Regulations

5.5.1 North American Electric Reliability Corporation/Western Electricity Coordinating Council
North American Electric Reliability Commission (NERC) is the Federal Energy Regulatory Commission-approved authority that develops and enforces r eliability standards for the bulk electric system in Northern America. SFPUC owns power generation and transmission assets that fall under the jurisdiction of NERC’s Reliability Compliance Program. NERC oversees t he Western Electricity Coordinating Council (WECC) , which is SFPUC’s regional entity for the western interconnection. WECC is responsible for compliance monitoring and enforcement, and oversees reliability planning and assessments. H HWP is the responsible entity for these regulatory activities.

Enforcement Actions : SFPUC self-reported three violations during the reporting cy cle.

Mitigation activities are complete, and SFPUC is awaiting final disposition of violations from WECC.

WECC Compliance Audit : In August 2020, WECC performed its Operation and Planning and Critical Infrastructure Protection Compliance Audit of the SFPUC program. The audit’s scope covered 11 reliability requirements from nine NERC r eliability standards, including three open enforcement actions. The next audit will occur in June 2023. T he 2020 audit results are summarized in the following paragraphs.
• Eight of the 11 reliability requirements were audited with “No Findings.” • One self-reported violation was confirmed without expanding scope. After the audit, SFPUC received a Notice of Compliance Exception, closing this violation with no penalties or further actions required.
• One self -reported violation was confirmed with additional instances of noncompliance.

SFPUC is awaiting additional information from WECC regarding any additional mitigation actions required.
• One self-reported violation is being recommended for dismissal. This self -report currently remains open, but no further action is required by SFPUC at this time.

Self-Certification: In February 2021, SFPUC completed the a nnual WECC self -certification process for calendar year 2020. SFPUC was required to self-certify to two operation and planning and five critical infrastructure protection reliability requirements. SFPUC did not identify any violations during the self-certification process. SFPUC was not required to self-certify in 2022 for calendar year 2021.

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5.5.2 Federal Energy Regulatory Commission (FERC)

5.5.2.1 Scope and Jurisdiction
FERC has regulatory jurisdiction over the operation of HHWP’s Moccasin Lowhead Powerhouse.

HHWP is required to provide documentation and facilitate inspections to maintain compliance.

5.5.2.2 Status and Updates
During this reporting cycle (July 1, 2020, through June 30, 2022), Moccasin Lowhead Powerhouse has been out of service. A flood on Moccasin Creek damage d the powerhouse, resulting in ongoing remediation since 2018. The powerhouse is expected to return to service in March 2023.

5.5.3 Wildfire Mitigation Plan
California Senate Bill (SB) 901 (2018), amended Public Utilities Code (PUC) § 8387, Chapter 6, Wildfire Mitigation. PUC section 8387 (b)(1) requires that “the local publicly owned electric utility or electrical cooperative shall, before January 1, 2020, prepare a wildfire mitigation plan. After January 1, 2020, a local publicly owned electric utility or electrical cooperative shall annually prepare a wildfire mitigation plan. It shall submit the plan to the California Wildfire Safety Advisory Board ( WSAB) on or before July 1 of that calendar year. Each local publicly owned electric utility and electrical cooperative shall update its plan annually and submit the update to the WSAB by July 1 of each year. At least once every 3 years, the submission shall be a comprehensive revision of the plan.” In June 2022, the most recent annual report was submitted to the commission and the state, as required.

SFPUC maintains a Wildfire Mitigation Plan (WMP). The WMP is built on the following primary objectives:

1. Minimizing Sources of Ignition . SFPUC cont inues to evaluate prudent and cost -effective improvements to its physical assets, operations, and training to minimize the risk of its facilities being the origin or contributing source of a catastrophic wildfire. These programs include, but are not limited to, implementation of fire risk analysis tools to assess the risk and consequence of a potential ignition ; strategic grid hardening, such as replacing high -risk equipment on distribution poles; an increase in situational awareness capabilities, achieved by adding more strategically placed weather stations; and proactive de-energization of lines during critical fire weather conditions. SFPUC will continue to implement additional recommendations over time through WMP evaluation and continuous improvement.

2. Grid Reliability and Resiliency . The second ob jective is to improve the reliability and resiliency of SFPUC -owned and operated electric grid. In addition to reducing wildfire ignition risks, programs such as grid hardening and enhanced vegetation management provide additional benefits such as improved reliability and resiliency. SFPUC will continue to assess industry best practices and new technologies that could help reduce the likelihood of a disruption in service due to planned or unplanned events; and expedite grid recovery efforts following a significant event, such as a fire.

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3. Measurement of Effectiveness and Performance . The third objective of this WMP is to measure the effectiveness and performance of SFPUC’s specific wildfire mitigation strategies.

SFPUC will monitor the performance —e.g., the increased rate of equipment failures or vegetation contacts. Based on performance, SFPUC will modify their program in an effort to continuously improve the safety, reliability, and resiliency of their equipment.

5.5.4 Physical Security Mitigation Plan
On January 10, 2019, the California Public Utilities Commission issued Decision 19-01-018 (Decision), requiring electrical utilities —including publicly owned utilities such as SFPUC —to identify electric distribution infrastructure subject to the Decision (Covered Distribution Facilities or CDFs), assess the potential risks associated with a physical attack on CDFs, and prepare a risk mitigation plan.

The Decision requires evaluation of the following elements of the existing design and operations of a CDF, and identification of the potential risks associated with a physical attack:
• existing power system resiliency and/or redundancy solutions (e.g., identifying other facilities capable of serving the load, temporary circuit ties, mobile generation, and/or storage solutions);
• availability of spare assets to restore a particular load; • existing physical security protections to reasonably address the risk; • potential for emergency responders to identify and respond to an attack in a timely manner; • location and physical surroundings, including proximity to gas pipelines and geographical challenges and impacts of weather;
• history of criminal activity at the facilities in the area; • availability of other sources of energy to serve the load (e.g., customer -owned backup generation or storage solutions); and
• availability of alternative ways to meet health, safety, or security needs.

SFPUC prepared a Physical Security Mitigation Plan (PSMP) for applicable CDFs. In accordance with the Decision, SFPUC appointed the Executive Director of the San Francisco Department of Emergency Management to act as the qualified authority to review the PSMP. The final PSMP incorporates recommendations from the qualified authority. SFPUC will review and update the PSMP every 5 years.

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6. Emerging Issues
There are several emerging issues that will impact WE over the next reporting cycle. Some issues are general and are a result of the economy and responding to a change in wor kforce culture.

However, WE must also respond to change s in local, state, and federal laws . This section will discuss emerging issues that will be addressed during the next reporting cycle . The section is organized into two subsections, 6.1, General; and 6.2, Water Quality.

6.1 General
This section will include a discussion of:
• inflation and supply chain;
• workforce challenges;
• electrification of vehicle fleet;
• impacts of COVID policies and protocols; and
• obsolete equipment/technology.

6.1.1 Inflation and Supply Chain
Over the past 2 years, the COVID-19 pandemic has resulted in some project construction delays and cost increases due to materials shortages, labor shortages, and shipping delays. Prior to 2020, the SFPUC applied construct ion escalation factors of 3 to 4 percent compounded annually for estimating future costs of capital projects. However, based on recommendations from professional cost estimating experts , SFPUC has doubled escalation factors through year 2024, and held the escalation factor at 4 percent thereafter. This has raised the estimated capital cost for future projects to accommodate potential future inflationary impacts.

Capital projects h ave experienced schedule delays due to impacts to product manufacturing, shipping, and availability of raw materials. In general, steel items and many electronics parts experienced significant delays, likely due to pandemic -related factory closures and production delays. Contractors complained of increasing costs for materials, especially on multi- year contracts. SFPUC held contractors to their bid prices; however , for change orders , the higher (more current) cost of materials was typically compensated. In addition, compensation was provided for contractors’ implementation of health and safety plans directly related to the pandemic. Although most construction delays related to supply chain have been deemed excusable but noncompens able, these delays have increased soft costs on projects, delayed projects’ close-out, and impacted staff availability for new projects.

Cost estimating consultants advising SFPUC shar ed that higher cost escalation in construction will likely continue for the next several years due to various interrelated factors, including time that will be required to resolve the supply chain crisis; shortage of labor nationwide, including skilled labor and management; international sanctions from the current war in Ukraine; recent passage of the Infrastructure Bill, which will increase construction activity and demand for labor and materials; and a higher Consumer Price Index that is projected by several industry experts over the next few years.

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6.1.2 Workforce Challenges
WE has experienced an increased number of resignations and retirements during the reporting cycle. For some WE divisions, the attrition rate for the reporting cycle has nearly doubled when compared to the previous 2- year period. This has significantly impacted operations and backlogged recruiting efforts. Four primary factors drove the unprecedented increase in separations: (1) the vaccination mandate; (2) return to worksite requirements; (3) competing companies’ incentives (e.g., fulltime telecommuting, compensation, and rapid hiring processes); and (4) housing issues (the Bay Area cost of housing and the availability of housing in remote locations like Moccasin) . To combat falling staffing levels, SFPUC has elevated its employee attraction efforts by (1) increasing our advertising efforts; (2) partnering with consulting firms to improve racial equity and inclusion initiatives to widen the candidate pool ; and (3) conducting multiple virtual job fairs. These efforts have provided some gain in achieving pre-COVID staffing levels; however, positions that have been “difficult to fill” (e.g., engineers, skilled trades) have become even more difficult to fill over the past 2 years.

6.1.3 Electrification of Vehicle Fleet
In May 2017, the SFBOS approved ordinance 115-17, amending the existing Administrative and Environmental Codes to require that any new passenger vehicle procured for the CCSF fleet be a zero emission vehicle, absent of a waiver, and that all passenger vehicles in the CCSF fleet be zero emission vehicles by December 31, 2022; and to encourage selection of zero emission vehicles in other classes as technology improves.

SFPUC’s passenger veh icle fleet consists of 66 vehicles, of which two are compliant with the ordinance, 27 are considered low emission (hybrid, compressed natural gas), and the remainder are traditional combustion engine. SFPUC will be filing a waiver to come into compliance with the ordinance.

Before purchasing more EVs , SFPUC needs to understand how to transition to electrifying its business fleet. Challenges range from suitability for SFPUC’s operations to maintaining the EVs and charging infrastructure. SFPUC will be evaluating this challenge over the next reporting cycle for passenger vehicles and half-ton trucks.

6.1.4 Impacts of COVID Policies and Protocols
After two and a half years, COVID continues to impact the workforce. Over the last reporting cycle, SFPUC was required to rebalance its budget to cope with the economic impacts of COVID, and continued to successfully provide essential services to the publi c, maintain financial sustainability, and preserving reserves for the longer term. As SFPUC enters a new stage of managing COVID, new challenges continue to impact productivity, including the need to define a new normal and transition the workforce.

Complying with COVID-related requirements continues to be a challenge as the guidance and internal procedures are updated on a regular basis to reflect the current status of the pandemic, health orders, California Occupational Safety and Health Administration regulations, and policy directives issued by the Department of Human Resources. Areas of impact include communication challenges and productivity of frontline workers.

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San Francisco Public Utilities Commission November 2022  183 Communicating changes has been a challenge, specifically because a large portion of the field staff has limited access to email or no internet access. In some cases, continual changes have led to mistrust amongst staff because individuals are unclear as to what the current policy is. SFPUC will continue to work on communication methods to keep staff informed, and will continue to prioritize the health, safety, and well-being of employees.

COVID continues to impact productivity. Scheduling around COVID, and the resulting increase in personnel vacancies, is impacting scheduling efficiency. COVID-related staffing shortfalls have made crew availability (the number of employees available to support a job) less predictable. This negatively impacts SFPUC’s ability to effectively schedule and complete PM jobs in a timely manner. It has also negatively i mpacted SFPUC’s ability to support project work, ultimately causing project completion delays. This is even more acute on multi-discipline work orders, with two or more crafts supporting maintenance and/or project work. For example, the O’Shaughnessy Dam Grounding Project involved multiple HHWP crews (electricians, laborers, carpenters, Project Managers, power system operators, linemen, and engineering). Due to crew availability shortfalls and supply chain issues (resulting from COVID), this project’s completion was delayed for nearly a year. Though it is not possible to control the impacts of COVID, SFPUC can affect vacancies. WE continues to make recruiting and hiring a priority.

SFPUC remains committed to rebuilding trust, work engagement, and a culture o f unity within our enterprise by monitoring morale, workplace stress, and providing additional support when needed.

6.1.5 Obsolete Equipment/Technology
SFPUC is experiencing a fairly new phenomenon with some of our equipment and is hearing similar concerns from other water utilities: equipment is becoming obsolete in 10 to 15 years, and manufacturers are not carrying parts for older models. In the past, it was not uncommon for equipment used in water treatment and delivery to be in service for 30 years or longer, and parts for older models continued to be made available by manufacturers even when newer models came on the market. In 2020, one of the UV r eactors at th e Thomas Shaft Backup Chlorination Facility needed new UV lamp wipers and some seals replaced. The UV system provider had stopped carrying replacement parts for that reactor model. The UV r eactors were installed in 2011, about 9 years earlier. Parts that would have cost a few hundred dollars and less than a week of labor to replace became an estimated $200,000 project to be completed by a JOC, with a cost of $120,000 for the new UV r eactors alone. This project is currently on hold pending further discussion with LLNL.

The issue is not isolated to UV reactors. Similar problems have surfaced for ultrasonic flowmeters, automatic transfer switches, VFDs , UPS units, and generator load banks, to name a few. The impact of this trend of the manufacturers ceasing to carry repair parts and supporting for equipment that is nowhere near the end of its service life is effectively a substantial reduction in asset useful life. This is a developing situation with significant ramifications. If this trend continues, SFPUC and other water utilities will have to plan for capital replacement of existing assets to match the rate at which the asset models are retired by the manufacturers, which is approximately three times the current rate. The reliability of the water systems will also be Section 6 – Emerging Issues and Concerns
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6.2 Water Quality
SFPUC continues to monitor water quality issues. This section includes a discussion of:
• disinfection byproducts;
• taste and odor;
• quinoline;
• microplastics; and
• an update on our triennial report, “Other Contaminants of Emerging Concern.”

6.2.1 Disinfection Byproducts
SFPUC notifies wholesale customers when elevated DBPs reach 80 percent of the drinking water standards (i.e., MCLs). This corresponds with wholesale customer notifications when total trihalomethanes reach 64 micrograms per liter (μg/L) or haloacetic acids (HAA5) reach 48 μg/L at Irvington Portal or at HTWTP. These levels were not exceeded during the reporting period.

During the reporting cycle , two w holesale customers reported elevated HAA5 levels in their distribution systems in the fourth quarter of 2021. SFPUC measured much lower HAA5 levels in RWS at that time and embarked on a joint investigation with the impacted customers. The joint investigation was concluded when it became apparent that analytical issues at the customer’s contract laboratories were likely causing the HAA5 discrepancies.

U.S. EPA’s M/DBP Stage 3 proposal is due in June 2024. All current regulations are open to review, including filtration avoidance requirements. The drinking water industry could see new regulations for NDMA, other DBPs, Legionella, etc. U.S. EPA is undertaking four grant projects, totaling $8.5 mil lion, to obtain occurrence/treatment/system data. SFPUC has been asked to participate in at least two proposals. SFPUC is also part of the Water Research Foundation (WRF) 5156 Legionella occurrence data collection project (meant to inform the M/DBP Stage 3 proposal), with monitoring starting in August 2022. SFPUC’s Millbrae Lab has developed internal Legionella testing capability for this project.

Taste and Odor
In early December 2016, SFPUC rece ived an unusually high number of T&O complaints from both retail and w holesale customers. The complaints were linked to an algal bloom in San Antonio Reservoir that was producing geosmin, a very common T&O compound. SFPUC has not experienced a major T&O event since 2016. In response to the 2016 event, SFPUC increased the routine T&O c ompound monitoring program at the SVWTP and initiated two treatment improvement projects for SVWTP: a PAC system and an ozone system. The PAC system construction was completed in December 2018, and it has been used on an as- needed basis depending on availa ble source waters and algal blooms. The ozone project completed its 35% design documents in April 2022 and will soon issue 65% design documents for review. The ozone construction is tentatively set to start in September 2023. Although PAC provides T&O treatment improvements at SVWTP, ozone will provide additional treatment capabilities for removing Section 6 – Emerging Issues and Concerns
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Future ozone treatment will be a valuable tool for optimizing water qua lity from the SVWTP during long Hetch Hetchy shutdowns.

WE also updated its Algae Monitoring and Mitigation Plan ( AMMP) in June 2019. The AMMP provides a comprehensive review of reservoir limnology, monitoring programs, and algae bloom mitigations. Monitoring and treatment triggers were revised for each source reservoir, and the best tools or strategies for algae bloom management were identified.

6.2.2 Quinoline
U.S. EPA issues a list once every 5 year s of no more than 30 unregulated contaminants to be monitored by public water systems under the Unregulated Contaminant Monitoring Rule. The UCMR4 required monitoring in the SFWS, which serves the City of San Francisco, between 2018 and 2020; however, SFPUC voluntarily monitored additional locations in RWS.

SFPUC comp leted UCMR4 monitoring in January 2019. Quinoline, a semi- volatile organic chemical, was detected at Baden Pump Station (in the SSPL at point-of-entry into the SFWS) and at the outlet at Sunset Reservoir. This chemical was also found at the LMPS.

SFPUC believes that the source of quinoline detections in these locations is coal tar lining (quinoline was not detected in water sources). The detections were localized and appear to be related to pipeline materials/ conditions and operational conditions (detention time/ flow or temperature). SFPUC’s long -term plan is to remove all coal tar lining. Coal tar lining will be removed and replaced during major pipeline maintenance projects, as detailed in Section 4.3.

On a broader level —to assess whether quinoline exists in RWS and whether a quinoline monitoring program is necessary for the SFPUC wate r supplies —a follow- up, voluntary monitoring event occurred in Decemb er 2019. Quinoline was sampled at nine transmission pipeline locations, including four locations where coal tar lining is still present inside the pipelines. In addition, quinoline was sampled at four major Peninsula and East Bay surface water reservoirs, AEP, TTF intake, SVWTP effluent, and HTWTP effluent. The follow -up monitoring did not detect any quinoline at any of these RWS locations; therefore, there is no need to have a quinoline monitoring program for RWS. U.S. EPA now has national occurrence data and will need to decide whether it has enough treatment/health effects data to proceed with a regulatory determination.

6.2.3 Microplastics
In July 2020, SWRCB adopted a definition of microplastics as solid polymeric materials to which chemical additives or other substances may have been added, which are particles that have at least three dimensions that are greater than 1 n anometer and less than 5,000 micrometers (µm).

Polymers that are derived in nature and have not been chemically modified (other than by hydrolysis) are excluded. SWRCB will require mandatory 4- year monitoring for these microplastics, possibly starting in 2023. This is an original program globally. SFPUC expects its results to be better than most utilities, given its protected watersheds, but cannot be certain until data are available. The SWRCB resolution adopting the definition of m icroplastics noted that evidence concerning the toxicity and exposure of humans to microplastics is nascent and rapidly Section 6 – Emerging Issues and Concerns
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  186 evolving, and that the proposed definition of “m icroplastics in d rinking water” is subject to change in response to new information. The definition may also change in response to advances in analytical techniques and/or the standardization of analytical methods.

In 2021, SWRCB released a draft Microplastics Monitoring Policy Handbook that proposed monitoring requirements for drinking water systems under a two -phased approach, following ELAP laboratory accreditation. Following public comments, SWRCB has postponed the monitoring requirements until after a pilot phase of monitoring study, which is scheduled to begin in fall 2022. The pilot pha se is currently under development, with SWRCB and partners evaluating sampling methods, developing standard protocols, and providing sampling training.

SWRCB expects to release a revised Policy Handbook for adoption in the fall. The revised Policy Handbook will include a list of Phase 1 water systems that will required monitoring under orders to be issued after SWRCB has conducted a sampling location workshop. SWRCB is r eportedly open for discussions at the workshop on aspects such as consolidating water systems and sampling requirements.

6.2.4 Other Contaminants of Emerging Concern
SFPUC is i n process of finalizing its triennial “Contaminants of Emerging Concern Report” update. The report covers DBP s, PFAS, microplastics, and other topics. Draft material was reviewed with w holesale customers and other stakeholders. The final report will be posted on the SFPUC website by October 2022.

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  187 Appendix A: Asset Inventory Tables

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  188 Table A-1: Dams
Asset Dam Type
Dam
Height
(feet) County
Completion
Date
DSOD
Jurisdictional?
Upcountry
O'Shaughnessy
Dam
Concrete
Gravity
Arch
430 Tuolumne 1923/1938 Yes
Cherry Valley
Dam
Earth and
Rock
330 Tuolumne 1955 Yes
Early Intake
Diversion Dam
Concrete
Arch
81 Tuolumne 1924 Yes
Eleanor Dam Concrete
Buttressed
Arch
70 Tuolumne 1918 Yes
Moccasin Dam Earth and
Rock
70 Tuolumne 1929 Yes
Priest Dam Earth and
Rock
160 Tuolumne 1923 Yes
Moccasin Upper
Dam
Concrete-
Gravity
30 Tuolumne
County
1936 Yes,
appurtenance to
Moccasin Dam
Bay Area
Calaveras Dam Earth and
Rock Filled
220 Alameda 1925/2019 Yes
Turner Dam Earth 195 Alameda 1965 Yes
Upper Alameda
Diversion Dam
Concrete
Slab and
Buttress
31 Alameda 1931 No
Lower Crystal
Springs Dam
Concrete
Gravity
163 San Mateo 1888/1890/ Yes
1911
Upper Crystal
Springs Dam
Earth 92.5 San Mateo 1877/1891 No
Pilarcitos Dam Earth 95 San Mateo 1866/1867/ Yes
1874
San Andreas Dam Earth 105 San Mateo 1870/1875 Yes
San Mateo Creek
Dam No. 1
Earth 20 San Mateo 1898 No
San Mateo Creek
Dam No. 2
Concrete
Arch
40 San Mateo 1898 No
Stone Dam Masonry
Arch
31 San Mateo 1871 No
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  189 Asset Dam Type
Dam
Height
(feet) County
Completion
Date
DSOD
Jurisdictional?
San Francisco
Sunset North Dam Earth 74 San
Francisco
1938 Yes
Sunset South Dam Earth 34 San
Francisco
1960 Yes
University Mound
North Basin
Earth 17 San
Francisco
1885 Yes
University Mound
South Basin
Earth 61 San
Francisco
1937 Yes
Merced Manor
Dam
Earth 23 San
Francisco
1936 No
Note:

DSOD = Division of Safety of Dams

Table A-2: Groundwater Wells/Filter Galleries
Asset
Number of
Wellheads Location Capacity
Bay Area
Pleasanton Well Field 2 Pleasanton < 1 mgd
Peninsula Conjunctive Use Wells (2019) 13 Various ~6.2 mgd Sunol Filter Gallery — Sunol 7.4 mgd
Upcountry
Cherry Valley Compound Well 1 Cherry Valley 3 to 7 gpm
O’Shaughnessy Backpacker Campground
Well 1 O’Shaughnessy 6.8 gpm
O’Shaughnessy Dam Campground Well 1 O’Shaughnessy 30 gpm Notes:
gpm = gallons per minute
mgd = million gallons per day

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  190 Table A-3: Supply Reservoirs
Asset
Capacity of
Reservoir
(AF)
Reservoir
Surface Area
(sq. mi) Location
Bay Area
Calaveras Reservoir 96,800 2.2 Alameda County
San Antonio Reservoir 50,500 1.3 Alameda County
Crystal Springs Reservoir
(Upper and Lower)
69,3004 2.3 San Mateo County
Pilarcitos Reservoir 3,100 0.2 San Mateo County
San Andreas Reservoir 19,000 0.9 San Mateo County
Upcountry
Early Intake Reservoir 115

Tuolumne County
Hetch Hetchy Reservoir 360,3605 3.1 Tuolumne County
Lake Eleanor 27,1136 1.5 Tuolumne County
Lake Lloyd
(Cherry Valley Reservoir)
273,500 2.8 Tuolumne County
Moccasin Reservoir 552 0.05 Tuolumne County
Priest Regulating Reservoir 1,706 0.07 Tuolumne County
Notes:

AF = acre-feet
sq. mi = square miles
Table A-4: Treated Water Storage
Asset Capacity (MG) Location
Bay Area
Town of Sunol (two tanks) 0.097 and 0.097 Sunol
Niles Reservoir Decommissioned Niles
Castlewood Reservoir 0.4 Pleasanton
Pulgas Balancing Reservoir 60 San Mateo
Merced Manor Reservoir 9.5 San Francisco
Sunset Reservoir – North Basin 89.4 San Francisco
Sunset Reservoir – South Basin 87.3 San Francisco
University Mound Reservoir – North Basin 59.4 San Francisco University Mound Reservoir – South Basin 81.5 San Francisco Upcountry
Moccasin Domestic 0.088 Moccasin
Early Intake Domestic 0.044 Early Intake
Cherry Compound 0.066 Cherry
O'Shaughnessy Domestic 0.041 O'Shaughnessy
Note:

MG = million gallons

4 57,704 AF maximum permissible level due to Fountain Thistle. 5 Capacity with drum gates activated.
6 Capacity with flashboards.

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  191 Table A-5: Water Treatment Facilities
Asset
Capacity
(mgd) Location
Bay Area
TTF 315 Tracy/San Joaquin
County
Thomas Shaft Facility 315 San Joaquin County
SVWTP 160 Alameda County
Sunol Chloramination Facility — Alameda County
HTWTP 1407 San Mateo County
Pulgas Dechloramination Facility 200 San Mateo County
Upcountry
Rock River Lime Treatment Plant 400 Tuolumne County
Moccasin Camp UV Facility 0.47 per reactor (2) Tuolumne County Early Intake Camp UV Facility 0.47 per reactor (2) Tuolumne County O’Shaughnessy Compound UV Facility 0.17 per reactor (2) Tuolumne County Notes:

HTWTP = Harry Tracy Water Treatment Plant
mgd = million gallons per day
SVWTP = Sunol Valley Water Treatment Plant
TTF = Tesla Treatment Facility
UV = ultraviolet

7 Peak hydraulic capacity is 180 mgd for a few hours.

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  192 Table A-6: Water Transmission – Pipelines and Tunnels
Asset Size
Length
(miles)
Flowrate
(Design or
Operating)
(mgd)
Installation
Date
Bay Area
CRT 10.5’ 25 400 1934
Alameda No. 1 69” 0.6 67 1934
Alameda No. 2 91” 0.6 134 1953
Alameda No. 3 96” 0.6 152 1967
Alameda No. 4 66” 0.6 160 2011
San Antonio Pipeline 60” 2.1 230 1967
SABPL 66” 1.3 230 2014
Calaveras Pipeline 44 to 72” 6 80 1965/1992
Irvington Tunnel No. 1 10.7’ 3.5 400 1934
Irvington Tunnel No. 2 102” 3.5 400 2014
BDPL No. 1 60” 21.2 46 1925/1933
BDPL No. 2 66” 21.2 59 1935/1936
BDPL No. 3 72” 34 80 1952
BDPL No. 4 90” 34 80 1965/1967
1973
BDPL No. 5 East Bay: 72”
Peninsula: 60”
7 9
80 55 2011/2012
Bay Tunnel 9’ 5 120 2014
Pulgas Tunnel 10.3-foot
horseshoe 1.9 1924
Stanford Tunnel 90” 0.2 80 1949
Palo Alto Pipeline 12 to 36” 4.4 1938
Crystal Springs Bypass Tunnel 9.5’ 3.4 215 1969
Crystal Springs Bypass Pipeline 96” 0.9 215 1970
New Crystal Springs Bypass Tunnel 96” 0.8 215 2011
SSPL 60” 13.4 111 1948-1958
CSPL No. 1 44” 17.1 10 1885/1956
CSPL No. 2 60” 19.3 52 1937/1956
CSPL No. 3 60” 3.6 60 1971/1987
SAPL No. 1 44” 12.5 22 1870-1939
SAPL No. 2 54” 12.3 37 1927-1928
2020
SAPL No. 3 60 to 66” 6.6 65 1992/2014
Sunset Branch Pipeline 60” 1.1 65 1947
Crystal Springs-San Andreas Force
main 61” 4.7 90 1898-1932
1968
Stone Dam Tunnel No. 1 4’-6” by 4’-9” 0.1 45 1872-1948
Stone Dam Tunnel No. 2 3’-6” by 4’-4” 0.61 45 1872-1948 San Mateo Tunnel No. 1 3’-6” by 5’-1” 0.65 40 1868
San Mateo Tunnel No. 2 4’-4” by 4’-6” 0.67 45 1898
Upcountry
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  193 Asset Size
Length
(miles)
Flowrate
(Design or
Operating)
(mgd)
Installation
Date
Canyon Power Tunnel 14' by 14'-6"
horseshoe 10.8 Design:
471 1965
Cherry Power Tunnel 12' by 12'
horseshoe 5.5 Design:
523 1959
Early Intake Bypass 14' by 14'-6"
horseshoe 0.38 NA 1967
Eleanor-Cherry Tunnel 10'-10" by 10'-
10" horseshoe 1.1 Operating:
646 1960
Foothill Division Tunnel 13'-4" by 14'-
3" horseshoe 16.4 400 1929
LCA 3.78 Operating:
107 1917
Moccasin Power Tunnel 13' by 13'
horseshoe 1 Design:
801 1925
Moccasin Reservoir Bypass Pipeline 108" 0.39 Operating:
320 1972/1988
Mountain Division Tunnel varies 19.2
Design:
400 at
grade of

1.55:1000
1925
Red Mountain Bar Siphon 9.5' 0.48 400 1970
SJPL No. 1 56 to 72" 47.4 Operating:
75 1932
SJPL No. 2 61" 47.4 Operating:
80 1952
SJPL No. 3 78" 47.4 Operating:
150 1968
SJPL No. 4 78" 17.2 Operating:
150 2011-2013
Notes:

BDPL = Bay Division Pipeline
CRT = Coast Range Tunnel
CSPL = Crystal Springs Pipeline
LCA = Lower Cherry Aqueduct
mgd = million gallons per day
SABPL = San Antonio Backup Pipeline
SAPL = San Andreas Pipeline
SJPL = San Joaquin Pipeline
SSPL = Sunset Supply Pipeline

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  194 Table A-7: Water Transmission – Pump Stations
Asset
Number of
Pumps
Total
Capacity
(mgd) Location
Bay Area
LMPS 5 65 San Francisco
Baden Pump Station 3 45 San Bruno
CSPS 4 120 San Mateo
Town of Sunol (potable) 2 0.72 Sunol
Sunol Pump Station 3 7.4 Sunol
Pulgas Pump Station 5 185 San Mateo
SAPS 8 (electric)
2 (diesel) 160 Sunol
Upcountry
Cherry-Eleanor Pump Station 10 300 Tuolumne County
Notes:

CSPS = Crystal Springs Pump Station
mgd = million gallons per day
LMPS = Lake Merced Pump Station
SAPS = San Antonio Pump Station

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  195 Table A-8: Water Transmission – Valve Lots
Asset Valves
Valve
Size
(inches) Pipeline Location
Bay Area
Alameda Creek
V8
V10
V11
V12
V13
V18
V20
V220
V240
36 by 60
60 by 84
60 by 84
36 by 60
36 by 60
60 by 72
60 by 72
60 by 72
60 by 72
ACDD
ACDD
ACDD
ACDD
ACDD
ACDD
ACDD
ACDD
ACDD
Sunol
AEP
X10
X20
X30
X32
X50
X55
72 72
60 60
54 54
AS-2
AS-3
AS-1
AS-1
AS-4
AS-4
Sunol
Alameda
+SAPL +
SABPL
W35
W41
W42Y
X15
X23
X24Y
X25
X35
X64
X71
X72
X73
X74
X75
X76
Y20
Y21
Y22
Y23
Y24
Y25
Y27
Y28
Y30
Y31
Y32
Y35
Y41
Y42
Y43
Y44
60 60
60 90
66 66
72 66
12 96
96 84
84 96
96 54
54 48
60 60
66 66
54 30
24 36
36 20
20 24
36 SAPL
SABPL
SABPL
AS-2
SABPL
SABPL
SABPL
AS-1

SUNOL PL
AS-4
AS-1
AS-2
AS-1
AS-3
AS-1
SAPL
SAPL
SAPL
SAPL
SABPL
SABPL
SABPL
SABPL
SAPL
SAPL
SAPL
SAPL
SAPL
SAPL
SAPL
SAPL
Sunol
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  196 Asset Valves
Valve
Size
(inches) Pipeline Location
AWP
X61
X62
X63
X85
X95
12 12
12 72
96 TOSPL
TOSPL
TOSPL
AS-2
AS-4
Sunol
Baden Valve Lot
K50
K51M
K54P
K54R
M50
M53R
M54P
M55P
P57M
P57R
P59R
R50
R55
R55K
R58P
T50
T52R
T54M
T55
T55P
T56R
T57P
T58K
42 36
42 30
60 30
42 42
30 42
42 42
54 36
42 48
42 42
54 16
42 42
24 CSPL No. 2
CSPL No. 2
CSPL No. 2/SSPL
CSPL No. 2
SSPL
SSPL/SAPL No. 2
SAPL No. 1
SAPL No. 1/CSPL No. 2
SAPL No. 1
CSPL No. 2
CSPL No. 2
SAPL No. 2
SAPL No. 2
SAPL No. 2/SAPL No. 3
SAPL No. 2/CSPL No. 2
SAPL No. 3
SAPL No. 2/SAPL No. 3
SAPL No. 2/SAPL No. 3
SAPL No. 3
CSPL No. 2/SAPL No. 3
SAPL No. 2/SAPL No. 3
CSPL No. 2
CSPL No. 2/SAPL No. 3
South San Francisco
Barron Creek
C34
C36
C35D
D34
D36
72 72
42 90
90 BDPL No. 3
BDPL No. 3
BDPL No. 3/BDPL No. 4
BDPL No. 4
BDPL No. 4
Palo Alto
Bear Gulch Valve
Lot
C58
C60
D58
D60
C59D
72 72
84 84
42 BDPL No. 3
BDPL No. 3
BDPL No. 4
BDPL No. 4
BDPL No. 3/BDPL No. 4
Atherton
Bellevue and Pepper
Valve Lot
M30
M31
M32K
M33L
L30
42 36
36 36
42 SSPL
SSPL
CSPL No. 2/SSPL
CSPL No. 3/SSPL
CSPL No. 3
Hillsborough
Calaveras Valve Lot
C20
C22D
C23D
D20
66 48
48 72
BDPL No. 3
BDPL No. 3/BDPL No. 4
BDPL No. 3/BDPL No. 4
BDPL No. 4
Milpitas
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  197 Asset Valves
Valve
Size
(inches) Pipeline Location
Calaveras Reservoir
V21
V22
V23
V24
V25
V26
V27
V31
V33
V34
V36
V37
V38
V330
V397
V40
V41
V41A
V41B
V42
V43
V43A
V43B
V44
V442
30 48
48 60
30 48
48 72
72 48
30 30 by 16
30 by 16
42 66
66 16
16 16
66 36
36 36
66 66
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
Calaveras Dam
CALPL
CALPL
CALPL
CALPL
CALPL
CALPL
CALPL
CALPL
CALPL
CALPL
CALPL
CALPL
Sunol
Crystal Springs/San
Andreas S49 36 by 48 CSPL/SAPL San Bruno
Capuchino Valve
Lot
M41
M41A
M41C
M43
M43A
M43C
24 24
24 14
14 14
SSBPL
SSBPL
SSBPL
SSBPL
SSBPL
SSBPL
San Bruno
Casey Quarry M20 42 SSPL Hillsborough
Crawford Valve Lot
C17
C18D
C19
D17
D19
78 42
78 78
78 BDPL No. 3
BDPL No. 3/BDPL No. 4
BDPL No. 3
BDPL No. 4
BDPL No. 4
Fremont
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  198 Asset Valves
Valve
Size
(inches) Pipeline Location
Crystal Springs
Reservoir
H10
H11
H12
H20
H21
H22
H88
H88A
H89
H90
H91
H92
H93
H96
J61K
J62K
K60
K70
L40P
L41K
L59K
L60
L70
42 42
42 42
42 42
16 16
60 16
66 by 60
66 by 60
24 24
24 24
48 48
30 42
44 44
44 LCS Outlet PL
LCS Outlet PL
LCS Outlet PL
LCS Outlet PL
LCS Outlet PL
LCS Outlet PL
LCS Outlet PL
LCS Outlet PL

CSPL/SAPL
LCS Outlet PL
DSOD Emerg.

DSOD Emerg.

LCS Outlet PL
LCS Outlet PL
CSPL No. 1/CSPL No. 2
CSPL No. 1/CSPL No. 2
CSPL No. 2
CSPL No. 2
CSPL No. 3/Millbrae Yard
CSPL No. 3/Millbrae Yard
CSPL No. 2/CSPL No. 3
CSPL No. 1
CSPL No. 1
Crystal Spring
Crystal Springs and
El Cerrito Valve Lot K20 48 CSPL No. 2 Hillsborough
Davis Tunnel
Diversion S20 56 by 52 Davis Tunnel
Edgewood Road
Valve Lot
A64D
B65D
B66C
24 24
20 BDPL No. 1/BDPL No. 4
BDPL No. 2/BDPL No. 4
BDPL No. 2/BDPL No. 3
San Mateo
Burlingame Valve
Lot K30 36 CSPL No. 2 Burlingame
El Camino Real/
Millbrae Yard Valve
Lot
K38P
K39P
K40
K40P
K41P
M40
M42K
16 16
30 12
12 42
36 CSPL No. 2
SAPL No. 1
CSPL No. 2
CSPL No. 2
CSPL No. 2
SSPL
SSPL/CSPL No. 2
Millbrae
Grimmer Shutoff
Station
A17
A18
A19
A191
A19B
A19E
A23B
B17
B18
E15A
66 66
66 36
36 24
24 60
60 42
BDPL No. 2
BDPL No. 2
BDPL No. 2
BDPL No. 2
BDPL No. 1/BDPL No. 2
BDPL No. 2/BDPL No. 5
BDPL No. 1/BDPL No. 2
BDPL No. 1
BDPL No. 1
BDPL No. 2/BDPL No. 5
Hayward
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  199 Asset Valves
Valve
Size
(inches) Pipeline Location
Guadalupe Valve
Lot
C24
C26
C25D
D24
D26
72 72
42 90
90 BDPL No. 3
BDPL No. 3
BDPL No. 3/BDPL No. 4
BDPL No. 4
BDPL No. 4
Santa Clara
HTWTP
T10R
T11
T12
T20
54 66
20 42
SAPL No. 3
SAPL No. 3
SAPL No. 3
SAPL No. 3
San Bruno
Hillsborough Valve
Lot
M15
M21K
M22J
78 36
36 SSPL
CSPL No. 2/SSPL
CSPL No. 2/SSPL
Hillsborough
Irvington Portal
A09
A10
B10
C10
D10
16 66
60 60
72 Hayward Serv.

BDPL No. 2
BDPL No. 1
BDPL No. 3
BDPL No. 4
Hayward
Hayward/EBMUD
Intertie
A21
A22
A23
A24
42 36
36 36
Hayward Intertie
Hayward Intertie
Hayward Intertie
Hayward Intertie
Hayward
New Irvington
Portal
A11
A11.1
A13E
B11
C11
D11
E10
E11
H1
H2
H3
IT2-1
60 16
24 60
78 96
72 72
24 24
24 96
BDPL No. 2
Hayward Pipeline
BDPL No. 2/BDPL No. 5
BDPL No. 1
BDPL No. 3
BDPL No. 4
BDPL No. 2
BDPL No. 5
Hayward Pipeline
NIT No. 1 Manifold
NIT No. 1 to Hayward
Pipeline
IT2
Fremont
(NIT)
Mountain View/
Alviso Valve Lot
C30
C31D
C32D
D30
42 48
48 72
BDPL No. 3
BDPL No. 3/BDPL No. 4
BDPL No. 3/BDPL No. 4
BDPL No. 4
Mountain View
Newark Tunnel
Shaft
A20U
B20U
E15
E20U
66 60
72 72
BDPL No. 2/BDPL No. 5
BDPL No. 1/BDPL No. 5
BDPL No. 5
BDPL No. 5
Fremont
Palo Alto Pipeline
F40
F45
F50
36 36
24 PAPL
PAPL
PAPL
Palo Alto
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  200 Asset Valves
Valve
Size
(inches) Pipeline Location
Paseo Padre Shutoff
Station
A14
A15
A161
A16B
B14
B15
E14
E14A
66 66
36 36
60 60
72 42
BDPL No. 2
BDPL No. 2
BDPL No. 2
BDPL No. 1/BDPL No. 2
BDPL No. 1
BDPL No. 1
BDPL No. 5
BDPL No. 2/BDPL No. 5
Hayward
Pilarcitos Reservoir
S10
S11
S12
22 26 by 36
26 by 36
PIL
PIL
PIL
Pilarcitos
Ravenswood Tunnel
Shaft
B50U
E50U
E52B
66 60
24 BDPL No. 5
BDPL No. 5
BDPL No. 2/BDPL No. 5
Fremont
Redwood City Valve
Lot
A50U
A60
A61B
A62B
B60
B62
E10F
E60
E61B
E61
F05
F06
F10
F20
F26
F30
60 42
30 30
66 48
24 60
42 60
24 24
20 20
24 30
BDPL No. 5
BDPL No. 1
BDPL No. 1/BDPL No. 2
BDPL No. 1/BDPL No. 2
BDPL No. 2
BDPL No. 2
PAPL
BDPL No. 5
BDPL No. 2/BDPL No. 5
BDPL No. 5
BDPL No. 1/BDPL No. 2
PAPL
PAPL
PAPL
PAPL
PAPL
East Palo Alto
Redwood City

Crystal Springs
Bypass Tunnel/
Bypass Pipeline
G10
G11
G12
G13
G14
G15
G16
G17
G18
G18A
G20
G32
G34
G36
G38
G40
G41
G42
120 by 96
120 by 120
42 42
42 42
48 by 48
48 by 48
84 18
120 by 120
96 96
78 60
72 54
42 Pulgas Tunnel
Pulgas Tunnel
Pulgas PS
Pulgas PS
Pulgas PS
Pulgas PS
Pulgas PS
Pulgas PS
Pulgas Balancing Res.

Pulgas Balancing Res.

CSBT
NCSBT
CSBPL

NCSBT/SSPL
NCSBPL/CSPL No. 2
CSBPL/SSPL and CSPL No. 2

CSBPL/SSPL
CSBPL/CSPL No. 2
San Mateo
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  201 Asset Valves
Valve
Size
(inches) Pipeline Location
CSPS
H81
H82
H83
H84
H85
H86
H87
H97
H98
H99
J10
J11
K10
M10
72 72
60 60
60 36
72 42
42 42
12 12
60 60
CSOS No. 1
CSOS No. 1

CSPS- CSPL/SAPL
Reservoir – Potable Pipeline
CSPS Suction
CSPS Disc. to
Potable Pipeline
SSPL
SSPL
SSPL
CSPL No. 2
CSPL No. 2
CSPL No. 2
SSPL
San Mateo
San Andreas
Reservoir
N20
N21
N30
N31
N32
N33
N40
N41
N50
N51
N69
N72
N74
P10
P48
R11
R12
R20
R70
R71
T64R
T65R
T70
54 54
48 48
48 48
54 60
54 60
96 96
78 24
44 54
54 42
54 54
36 36
36 SAPL No. 2RW
SAPL No. 2RW
SAPL No. 3RW
SAPL No. 3RW
SAPL No. 3RW
SAPL No. 3RW
SAPL No. 2
SAPL No. 3RW
SAPL No. 3RW
SAPL No. 3RW
HTWTP Treated Water
HTWTP Treated Water
SSBPL
SAPL No. 1
SAPL No. 1
SAPL No. 2
SAPL No. 2
SAPL No. 2
SAPL No. 2
SAPL No. 2
SAPL No. 2/No. 3
SAPL No. 2/No. 3
SAPL No. 3
San Bruno
Pulgas Valve Lot
A68
A70
B68
B70
C68
C70
D68
D70
E68
E70
42 42
42 42
48 48
72 72
60 60
BDPL No. 1
BDPL No. 1
BDPL No. 2
BDPL No. 2
BDPL No. 3
BDPL No. 3
BDPL No. 4
BDPL No. 4
BDPL No. 5
BDPL No. 5
San Mateo
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  202 Asset Valves
Valve
Size
(inches) Pipeline Location
SAPS Valve Lot
X11
X111
X112
X12
X14
X22
W11
W12
W15
W20
W21
W22
W30
W31
W32
W33
20 20
20 60
66 60
54 66
36 60
54 54
60 42
60 60
SVWTP Eff.

SVWTP Eff.

AS-2
SVWTP Eff.

CALPL
CALPL
San Antonio Pipeline
SVWTP Eff.

SVWTP Eff.

San Antonio Pipeline
San Antonio Pipeline
San Antonio Pipeline
San Antonio Pipeline
Sunol
San Antonio
Reservoir
Y01
Y02
Y03
Y04
Y05
36 36
36 36
36 San Antonio Pipeline
San Antonio Pipeline
San Antonio Pipeline
San Antonio Pipeline
San Antonio Pipeline
Sunol
San Mateo Creek
Dam
S13
S30
S31
S32
S33
S40
36 by 36
36 by 36
39 by 18
39 by 18
39 by 18
30 San Mateo Tunnel No. 1
San Mateo Tunnel No. 2
San Mateo Tunnel No. 2
San Mateo Tunnel No. 2
San Mateo Tunnel No. 2
San Mateo Tunnel No. 2

San Pedro Valve Lot
M60
T60
T61M
T62R
T63R
T64M
R59
R60
42 48
36 30
30 36
42 42
SSPL
SAPL No. 3
SAPL No. 3/SSPL
SAPL No. 3/SAPL No. 2
SAPL No. 3/SAPL No. 2
SAPL No. 3/SSPL
SAPL No. 2
SAPL No. 2
Colma
Stanford East Portal C40
D40
48 72
BDPL No. 3
BDPL No. 4 Palo Alto
SFWD/Valley Water
C23.1
C23.2
C23.3
D23.1
D23.2
42 42
42 42
42 BDPL No. 3
BDPL No. 3
BDPL No. 3/BDPL No. 4
BDPL No. 4
BDPL No. 4
Santa Clara
Stanford West Portal C50
D50
48 72
BDPL No. 3
BDPL No. 4 Palo Alto
Stone Dam S60
S61
22 48 by 48
Stone Dam
Stone Dam Stone Dam
Sunset Branch
Pipeline
N44
N75
78 78
SSBPL
SSBPL San Bruno
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  203 Asset Valves
Valve
Size
(inches) Pipeline Location
SVWTP W10
W40
42 60
CALPL
San Antonio PL Sunol
Tissiack Valve Lot
C14
D14
C15D
C16
D16
78 78
42 78
78 BDPL No. 3
BDPL No. 4
BDPL No. 3/BDPL No. 4
BDPL No. 3
BDPL No. 4
Fremont
Upcountry
Canyon Portal Valve
House CPVH BFV 96 KPH Penstock Early Intake
Eleanor Release
Valves
SG 1
SG 2
G 3
G 4
24 24
24 24
Eleanor Creek Eleanor
Early Intake Dam SG 1
SG 2
36 36 Tuolumne River Early Intake
Cherry-Eleanor
Tunnel
SG A
SG B
72 by 96
72 by 96 Cherry-Eleanor Tunnel Cherry Pump Station
Mountain Tunnel
Headgates
HG 2
HG 3
HG 4
48 by 60
48 by 60
48 by 60
Mountain Tunnel Early Intake
Cherry Valley Dam
FCV 1
FCV 2
JFV 1
JFV 2
12-inch Needle
BFV 1
BFV 2
66 66
18 18
12 84
84 Cherry Creek Cherry Valve House
BFV 3 84 Cherry Power Tunnel
Emery Crossover
Valves
EC-EXO101
EC-EXO201
EC-EXO301
EC-EXO102
EC-EXO202
EC-EXO302
EC-EXOUX12
EC-EXOUX23
EC-EXODX12
EC-EXODX23
60 60
72 60
60 72
36 42
30 36
SJPL No. 1
SJPL No. 2
SJPL No. 3
SJPL No. 1
SJPL No. 2
SJPL No. 3
SJPL Nos. 1 and 2
SJPL Nos. 2 and 3
SJPL Nos. 1 and 2
SJPL Nos. 2 and 3
Stanislaus County
Granite Portal Valve
House BFV 94 HPH Penstock Tuolumne County
Oakdale Portal
Valve House
ODP101
ODP201
ODP301
ODP401
60 60
78 78
SJPL No. 1
SJPL No. 2
SJPL No. 3
SJPL No. 4
Tuolumne County
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  204 Asset Valves
Valve
Size
(inches) Pipeline Location
O'Shaughnessy Dam
V1
V2
V3 through V8
V12 and V13
V15 and V16
72 75
60 36
60 Tuolumne River
O'Shaughnessy Dam Canyon Power Tunnel
West Portal Valve
House
BFV 1 and
BFV 2 104 Moccasin Penstock West Portal
Pelican Crossover
Valves
PC-PXO101
PC-PXO201
PC-PXO301
PC-PXO102
PC-PXO202
PC-PXO302
PC-PXO402
PC-PXOUX12
PC-PXOUX23
PC-PXODX12
PC-PXODX23
PC-PXODX34
60 60
72 60
60 72
72 36
42 30
36 36
SJPL No. 1
SJPL No. 2
SJPL No. 3
SJPL No. 1
SJPL No. 2
SJPL No. 3
SJPL No. 4
SJPL Nos. 1 and 2
SJPL Nos. 2 and 3
SJPL Nos. 1 and 2
SJPL Nos. 2 and 3
SJPL Nos. 3 and 4
Vernalis
Roselle Crossover
Valves
RC-RXO101
RC-RXO201
RC-RXO301
RC-RXO102
RC-RXO202
RC-RXO302
RC-RXOUX12
RC-RXOUX23
RC-RXODX12
RC-RXODX23
60 60
72 60
60 72
36 42
30 36
SJPL No. 1
SJPL No. 2
SJPL No. 3
SJPL No. 1
SJPL No. 2
SJPL No. 3
SJPL Nos. 1 and 2
SJPL Nos. 2 and 3
SJPL Nos. 1 and 2
SJPL Nos. 2 and 3
Riverbank
SJPL No. 4 Tie-In
Vault
P4J301
P4J401
60 60
SJPL No. 3
SJPL No. 4 Stanislaus County
SJPL Nos. 3 and 4
Throttling Station
T3E331
T3E301
T4E431
T4E401
36 72
36 72
SJPL No. 3
SJPL No. 3
SJPL No. 4
SJPL No. 4
Stanislaus County
SJPL No. 2
Throttling Station
T2E
T2E201
T2E231
48 30
SJPL No. 2
SJPL No. 2 Stanislaus County
SJPL No. 2
Throttling Station
T2W
T2W201
T2W231
48 30
SJPL No. 2
SJPL No. 2 Stanislaus County
Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  205 Asset Valves
Valve
Size
(inches) Pipeline Location
San Joaquin River
Valve House
SJV331
SJV311
SJV212
SJV231
SJV211
SJV131
SJV112
SJV113
42 42
20 30
30 30
18 24
SJPL No. 3
SJPL No. 3
SJPL No. 2
SJPL No. 2
SJPL No. 2
SJPL No. 1
SJPL No. 1
SJPL No. 1
Stanislaus County
Tesla UV Valve
House
TUV101
TUV201
TUV301
TUV401
60 60
78 78
SJPL No. 1
SJPL No. 2
SJPL No. 3
SJPL No. 4
San Joaquin County
Tesla Portal Valve
House
TPV101
TPV201
TPV301
60 60
78 SJPL No. 1
SJPL No. 2
SJPL No. 3
San Joaquin County
Notes:

ACDD = Alameda Creek Diversion Dam
AEP = Alameda East Portal
AS = Alameda Siphon
AWP = Alameda West Portal
BDPL = Bay Division Pipeline
BFV = butterfly valve
CALPL = Calaveras Pipeline
CSBPL = Crystal Springs Bypass Pipeline
CSBT = Crystal Springs Bypass Tunnel
CSOS = Crystal Springs Outlet Structure
CSPL = Crystal Springs Pipeline
CSPS = Crystal Springs Pump Station
DSOD = Division of Safety of Dams
EBMUD = East Bay Municipal Utility District
HTWTP = Harry Tracy Water Treatment Plant
LCS = Lower Crystal Springs
NCSBPL = New Crystal Springs Bypass Pipeline
NCSBT = New Crystal Springs Bypass Tunnel
NIT = New Irvington Tunnel
PAPL = Palo Alto Pipeline
PIL = Pilarcitos Dam Pipeline
Pulgas PS = Pulgas Pump Station
SABPL = San Antonio Backup Pipeline
SAPL = San Andreas Pipeline
SAPS = San Antonio Pump Station
SFWD = San Francisco Water Department
SJPL = San Joaquin Pipeline
SSBPL = Sunset Branch Pipeline
SSPL = Sunset Supply Pipeline
TOSPL = Town of Sunol Pipeline
SVWTP = Sunol Valley Water Treatment Plant
UV = ultraviolet
Valley Water = Santa Clara Valley Water District

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  206 Table A-9: Water Transmission – Interties
Asset
Capacity
(mgd) Location
Bay Area
DWR 50 Sunol
EBMUD
30 mgd to/from EBMUD
15 mgd to/from SFPUC
15 mgd to City of Hayward
Hayward
Valley Water 40 Milpitas
Notes:

DWR = California Department of Water Resources
EBMUD = East Bay Municipal Utility District
mgd = million gallons per day
Valley Water = Santa Clara Valley Water District
SFPUC = San Francisco Public Utilities Commission

Table A-10: Water Transmission – Town of Sunol Distribution System Asset
Size
(inches)
Total Length
(miles)
Capacity
(mgd)
Bay Area
Town of Sunol Distribution
System
4” 0.75

0.15 6” 0.66
8” 0.2
2” 0.7
Upcountry
Moccasin Camp N/A N/A N/A
Early Intake Camp N/A N/A N/A
O'Shaughnessy Compound N/A N/A N/A
Cherry Valley Compound N/A N/A N/A
Notes:
mgd = million gallons per day
N/A = not applicable

Appendix A – Asset Inventory Tables
2022 State of the Regional Water System Report

San Francisco Public Utilities Commission November 2022  207 Table A-11: Watershed and Lands Management – Watersheds Asset
Size of Hydrologic
Watershed (sq. mi)
Area Owned by
SFPUC (sq. mi) Location
Bay Area
Calaveras Watershed 135 26 Alameda and Santa
Clara Counties
Crystal Springs Watershed 24.8 24.8 San Mateo County
Pilarcitos Watershed 6.2 6.1 San Mateo County
San Andreas Watershed 4.1 4.0 San Mateo County
San Antonio Watershed 40 13 Alameda County
Upcountry
Early Intake Watershed 29 0 Tuolumne County
Hetch Hetchy Watershed 459 0 Tuolumne County
Moccasin Watershed 0 0 Tuolumne County
Lake Eleanor Watershed 79 0 Tuolumne County
Lake Lloyd Watershed 114 0 Tuolumne County
Lower Cherry Diversion
Dam Watershed 32 0 Tuolumne County
Priest Watershed 2.8 0 Tuolumne County
Note:

SFPUC = San Francisco Public Utilities Commission
sq. mi = square miles
Table A-12: Powerhouses
Asset
Power Output at
Full Reservoir
(MW)
Draft
(mgd) Location
Completion
Date
Upcountry
Kirkwood Powerhouse 125 820 Tuolumne County 1964
Moccasin Powerhouse 110 860 Tuolumne County 1925/1969
Moccasin Low Head
Powerhouse 2.9 265 Tuolumne County 1986
Notes:
mgd = million gallons per day
MW = megawatt
Table A-13: Penstocks
Asset
Total Length
(miles) Location Completion Date
Upcountry
Kirkwood Penstock 0.37 Tuolumne County 1964
Moccasin Penstock 1.1 Tuolumne County 1925/portions in 1969 Moccasin Low Head Penstock 0.5 Tuolumne County 1986

CleanPowerSF Sfpuc CommissionDecember 13, 2022

CleanPowerSF Sfpuc Commission
December 13, 2022