1 Hetch Hetchy Capital Improvement Program
Q4 | FY 2022
–
2023
September 26, 2023
Katie Miller, Director
Water Capital Programs
Infrastructure Division
Planning (4),
$162M
Design (4),
$80M
Bid & Award
(0), $0
Construction (3),
$310M
Closeout (2),
$25M
Completed (1),
$4M
Multiple Phase (2),
$209M
Not
Initiated (1),
$16M
$806M
(17 Projects)
* Excluded 3 Project
Development Accounts ($56M)
Project Count by Phase*
HCIP Program Status (as of June 2023)
33%
% Complete
Expenditures
$255M $607M
Expenditures
Expended Remaining
HCIP Program Cost Summary
(from Table 3)
3 Program Name
Expenditures
to Date
($Million)
Expenditures
During Q4
($Million)
Current
Approved
Budget
($Million)
Current
Forecasted
Cost
($Million)
Cost
Variance
($Million)
Cost
Variance
in Q4
($Million)
Water
Infrastructure $23 $2 $156 $155 ($1) -
Power
Infrastructure $83 $2 $205 $272 $67 -
Joint
Infrastructure $149 $9 $501 $524 $23 -
Overall HCIP $255 $13 $862 $951 $89 -
O’Shaughnessy Dam Outlet Works
Phase 1
4 Progress and Status:
• Progressive Design-Build contract for
design of new bulkhead system
awarded; work commencing
September.
• Drawings and specifications for
drainage improvements prepared; to be
advertised for bid in October.
• Job Order Contract for modification of
tunnel access awarded.
• Construction contract for instream flow
release valve awarded.
Approved Budget: $47.89M
Forecast Completion: Sept 2025
Current Phase: Design
Expended to Date: $5.67M
Variances:
• $0
• 0 days
O’Shaughnessy Dam
Releases into Tuolumne
River
Transmission Lines 7/8 Upgrades
5 Progress and Status:
• Contractor continued foundation
construction at the existing tower legs.
• Temporary overhead transmission line
crossing structures completed at all
road, railroad, and adjacent overhead
utility crossings.
• All long lead materials have been
ordered, and deliveries are arriving
and being stored on-site.
Approved Budget: $37.97M
Forecast Completion: Jan 2025
Current Phase: Construction
Expended to Date: $7.48M
Variances:
• $0
• 0 days
Tower 527 Foundation
QUESTIONS?
OUR MISSION: To provide our customers with high-quality, efficient and reliable water, power and sewer services in a manner that values environmental and community interests and sustains the resources entrusted to our care.
525 Golden Gate Avenue, 13th Floor
San Francisco, CA 94102
T 415.554.3155
F 415.554.3161
TTY 415.554.3488
DATE: September 19, 2023
TO: Commissioner Newsha Ajami, President
Commissioner Sophie Maxwell, Vice President
Commissioner Tim Paulson
Commissioner Anthony Rivera
Commissioner Kate Stacy
FROM: Dennis J. Herrera, General Manager
RE: Hetch Hetchy Capital Improvement Program Quarterly Report Quarterly Report (4 th Quarter / FY 2022-2023)
Enclosed please find the Hetch Hetchy Capital Improvement Program (HCIP) Quarterly Report for the 4 th Quarter (Q4) of Fiscal Year (FY) 2022-2023. The primary intent of the report is to provide the Commission, stakeholders, and the public with a status summary of the HCIP based on data for the period of April 1, 2023 to June 30, 2023.
Attachment
QUARTERLY REPORT
Hetch Hetchy Capital Improvement Program
April 2023 – June 2023
Published: September 19, 2023
DRAFT
i
HCIP Quarterly Report Q4-FY2022-2023 (04/01/23– 06/30/23)
EXECUTIVE SUMMARY
This quarterly report provides a summary update on the Hetch Hetchy Capital Improvement Program (HCIP) that is part of the larger Hetch Hetchy Water Capital Improvement Program. The primary intent of the report is to provide the Commission, stakeholders, and the public with a status summary of the HCIP based on data for the period of April 1, 2023 to June 30, 2023.
This quarterly report includes all approved HCIP projects in the Hetch Hetchy Water Capital Improvement Program according to the 10-Year Capital Plan for FY2022-23 to FY2031-32, presented to and adopted by the Commission on February 8, 2022 (2022 HCIP).
There are seventeen (17) projects in the 2022 HCIP together with three (3) project development (PD) accounts for program-level expenditures for each of the Water, Power, and Joint Programs. There were no projects added or removed from the 2021 HCIP.
Program Current Status:
As of the end of the reporting period, the status of the 17 HCIP projects (excluding for these purposes the 3 Project Development (PD) accounts) is as follows: one (1) project not initiated, eight (8) projects in planning, design, or bid & award, three (3) projects in construction, two (2) projects that are multiple phases, two (2) projects in closeout, and one (1) project completed. During the quarter, one project moved from Planning to Design phase, and one project moved from Closeout to Completed.
Approved Budget for Projects in Each Phase
ii
HCIP Quarterly Report Q4-FY2022-2023 (04/01/23– 06/30/23) The following Tables provide a high-level summary of the cost and schedule status for this program (including the 3 PD accounts).
Table A shows that the 2022 HCIP has a Current Approved Budget and Current Forecast Cost of $862.31M and $950.91M, respectively.
* Negative number reflects cost increases since last quarter, and positive number reflects cost reduction since last quarter.
Table B shows that the
2022 HCIP has an Approved and Forecast Completion Date of 10/30/35. * “A” is used after a date to represents an actual date as opposed to a forecast or approved date.
Program Key Updates:
The key updates for the HCIP include:
For the SJPL Valve and Safe Entry Improvements project, materials procurements and fabrication continued in preparation for the next winter shutdown for construction contracts under Phase 1A and Phase 1B. The 95% design was completed for Phase 2 and distributed for review. The Phase 3 construction contract is forecasted to advertise in September. Based on the Engineers Estimate, the Phase 3 forecasted construction cost has increased due to additional scope, escalation, and higher material cost. The additional scope is the recirculation system, and the material cost increase was from pipe and concrete. For Moccasin Powerhouse Bypass Upgrades project, the design phase was initiated in June, with 35% design submittal anticipated in November 2023. A Class 3 third-party cost estimate confirmed that construction costs are higher than in the approved budget due to scope refinement and increase in raw material cost.
Table A. Program Cost Summary
Program
Expenditures
To Date
($ Million)
(A)
Current
Approved
Budget
($ Million)
(B)
Q4/FY22-23
Forecast
Costs
($ Million)
(C)
Cost
Variance
($ Million)
(D = B - C)
Cost
Variance
Over
Reporting
Period *
($ Million)
(E)
Program Total $254.94 $862.31 $950.91 ($88.60) -
Table B. Current Approved vs. Current Forecast Schedule Dates Program
Current
Approved
Project
Start
Actual*
Start
Current
Approved
Completion
Current
Forecast
Completion
Schedule
Variance
(Months)
Overall
HCIP Program 10/03/11 10/03/11 A 10/30/35 10/30/35 - iii
HCIP Quarterly Report Q4-FY2022-2023 (04/01/23– 06/30/23) • For Transmission Lines 7/8 Upgrades project, temporary overhead transmission line crossing structures have been completed at all road, railroad, and adjacent ov erhead utility crossings.
All long lead
materials have been ordered, and deliveries are arriving and being stored on-site. • For the Moccasin Penstock Rehabilitation, five evaluation panels were convened to review project alternatives, and
workshops are scheduled in the next quarter to present the preferred alternative to management.
• For O’Shaughnessy Dam Outlet Works Phase 1, Subproject A (Bulkhead): During this quarter, DB-135, the
progressive-design-build contract, for the design and construction of the new bulkhead system was awarded. Subproject B (Drainage & Misc. Dam Improvements): The drawings and specifications for the improvements are being prepared for advertisement to bid
in October 2023. Subproject C (Instream Flow Release Valve Replacement): A JOC contract (JOC-87-06) for modification of the tunnel
access building and contract (HH-1011) for
construction of the instream flow release valve replacement were awarded. • For Moccasin
Dam & Reservoir Long-Term Improvements, the engineering consultant completed and submitted a draft conceptual engineering report (CER) with conceptual details, engineering evaluation, and cost estimate for the new auxiliary spillway. The physical hydraulic model of the proposed auxiliary spillway was constructed, and a demonstration flow test was performed in the Northwest Hydraulic Consultants hydraulic laboratory. • For the Mountain Tunnel Improvements Project, significant work was accomplished at the Priest Reservoir site include completion of the Flow Control Facility shaft waterproofing and installation
of rebar for the second lift of the final lining. Work in the Priest Adit continued with final preparation completed to begin installation of the waterproofing membrane. Rickson Road improvements are nearly complete.
Storm damage repair work took place along 5/6 Adit Road and began at Second Garrote. Discussions regarding South Fork are now focused on completing the original design with additional safety improvements along the road and near the excavation location of the shaft.
• For Moccasin Wastewater Treatment Plant, the 100% design package was received and is currently
under review.
iv
HCIP Quarterly Report Q4-FY2022-2023 (04/01/23– 06/30/23)
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TABLE OF CONTENTS
HETCH HETCHY WATER AND POWER (HHWP) – WATER DIVISION
CAPITAL IMPROVEMENT PROGRAMS
INTRODUCTION
HETCH HETCHY CAPITAL IMPROVEMENT PROGRAM (HCIP)
1. Program Description
2. Program Status
3. Program Cost Summary
4. Program Schedule Summary
5. Budget and Schedule Trend Summary
6. Project Performance Summary
7. Project Status Report
8. On-Going Construction
9. Projects in Closeout
10. Completed Projects
APPENDICES
A. Project Descriptions
B. Approved Project Level Schedules/Budgets
C. List of Acronyms
HETCH HETCHY WATER AND POWER (HHWP)–
WATER DIVISION CAPITAL IMPROVEMENT PROGRAMS
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HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23)
INTRODUCTION
The Hetch Hetchy Water and Power (HHWP) Water Division is the division responsible for operating, managing, and maintaining the HHWP system and facilities. This includes water facilities that are part of the Regional Water System from Hetch Hetchy Reservoir, located in Yosemite National Park, to Alameda East Portal, located in Sunol Valley and power facilities located from Early Intake to Newark.
The HHWP Water Division operates, manages, and maintains three impoundment reservoirs, three regulating reservoirs, four powerhouses, one switchyard, three substations, 170 miles of pipeline and tunnels, almost 50 miles of paved road, over 160 miles of transmission lines, watershed land, and right- of-way property. HHWP Water Division provides 85 percent of the San Francisco Public Utilities Commission (SFPUC) water supply for 2.7 million residential, commercial, and industrial customers in Alameda, Santa Clara, San Mateo, and San Francisco counties. On average, HHWP Water Division generates about 1,650 gigawatt hours (GWH) of clean hydro-generated power annually. A majority of HHWP staff is based in Moccasin, CA, which is 140 miles east of San Francisco.
The HHWP Water Division’s capital improvement pr ograms are divided into two programs: Hetch Hetchy Capital Improvement Program (HCIP) and Renewal and Replacement (R&R). This report provides a quarterly status update on the HCIP, a gr oup of capital improvement projects that are greater than $5M in value and have been approved by the Commission as part of the SFPUC’s 10-Year Capital Improvement Program. The status of the Hetch Hetchy R&R projects is reported annually in the Annual Report on Water Enterprise-Managed Capital Improvement Projects.
The map below shows the location of the assets and facilities associated with HHWP.
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HETCH HETCHY CAPITAL IMPROVEMENT PROGRAM (HCIP)
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HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23)
1. PROGRAM DESCRIPTION
The Hetch Hetchy Capital Improvement Program (HCIP) is a multi-year group of capital projects to upgrade existing, aging infrastructure so that it will meet the challenges of today and the future. These projects will deliver improvements that enhance the SFPUC’s ability to provide reliable, affordable, high quality water to its 2.7 million customers in an environmentally sustainable manner. The goals are to 1) provide capital improvements needed to cost-effectively ensure that water quality, seismic reliability, delivery reliability, and water supply objectives established for the Regional Water System facilities managed by HHWP are met, while 2) optimizing the benefits of HHWP power facilities operations.
Ongoing development of the HCIP will sustain the Regional Water System’s status as an unfiltered water source and a gravity-driven system.
The scope of HCIP is divided into three major project types: Water, Power, and Joint. The Water sub- program includes only asset improvements benefiting the SFPUC’s water customers. The Power sub- program includes only asset improvements used to generate environmentally friendly hydroelectric energy. The Joint sub-program includes projects for assets that are used for both water delivery and power generation. In addition, projects in each sub-program of the HCIP have been further organized by asset type consisting of the following:
Water Infrastructure
Water Conveyance – projects to enhance the reliability of water delivery through pipelines and penstocks, allowing for both delivery of water to SFPUC customers and delivery of water to powerhouses for power generation.
Power Infrastructure
Powerhouse – projects to improve facilities at the Holm, Kirkwood, and Moccasin powerhouses. Switchyard & Substations – projects to meet operational objectives for power, including reliability, regulatory compliance, and sustainability. Transmission Lines – projects to expand or improve power assets for electricity transmission Joint (Water and Power) Infrastructure
Dams & Reservoirs – projects to improve assets used for storage and delivery of water to SFPUC customers, as well as for water storage for power generation. Mountain Tunnel – projects to address deficiencies with the Mountain Tunnel, a critical, non- redundant link in the Hetch Hetchy and Regional Water System that conveys water from Kirkwood Powerhouse to Priest Reservoir.
Roads & Bridges – projects to replace or improve bridges that are utilized to access HHWP assets.
Tunnels – projects to repair tunnels along the HHWP system (other than Mountain Tunnel). Utilities – projects to expand or improve utilities for asset and work locations such as water and wastewater treatment facilities.
Buildings – projects to provide safe and code compliant work spaces. 1 HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23)
2. PROGRAM STATUS
This Quarterly Report presents the progress made on HCIP between April 1, 2023 and June 30, 2023.
This document serves as the fourth (4th) Quarterly Report in Fiscal Year 2022-2023 (FY23) published for the HCIP.
This quarterly report includes all HCIP projects in the Hetch Hetchy Water Capital Improvement Program according to the 10-Year Capital Plan for FY2022-23 to FY2031-32 (FY23-32 CIP), presented to and adopted by the Commission on February 8, 2022, under Resolution No. 22-0031 (2022 HCIP).
There are seventeen (17) projects in the 2022 HCIP together with (3) project development (PD) accounts for program-level expenditures for each of the Water, Power, and Joint Programs. A description of each project and of each project development account is provided in the Appendix A of this Report.
The accrued PD expenditures are included in the Cost Summary in Table 3 in order to give an accurate report of the overall HCIP cost performance.
Figure 2.1 shows the total Approved Budget for all seventeen (17) projects in each phase of the program as of June 30, 2023 (PD accounts do not have phases and are not included in Figure 2.1).
The number of projects currently in each phase is shown in parentheses.
Figure 2.1 Approved Budget for Projects in Each Phase
2 HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23) Figure 2.2 shows the total number of projects in the following stages as of June 30, 2023: Pre- construction, Construction, and Post-construction.
Figure 2.3 summarizes the environmental review status of the HCIP projects as of June 30, 2023.
Environmental review is performed for projects under California Environmental Quality Act (CEQA).
Figure 2.2 Number of Projects in Pre-construction, Construction, and Post-Construction Figure 2.3 Program Environmental Review
3 HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23)
3. PROGRAM COST SUMMARY
Table 3 provides an ov
erall cost summary of the 17 HCIP projects and 3 HCIP PD accounts at the end of the quarter. It shows the Expenditures to Date, Current Approved Budget, Current Forecast Cost, the Cost Variance between the Approved and Forecast Costs, and the Cost Variance Over the Reporting Period (difference between cost forecasts reported in Q3/FY22-23 and in Q4/FY22-23). The Current Approved Budget and Forecast Cost for the HCIP under the FY23-32 CIP are $862.31 million and $950.91 million, respectively.
* Negative number reflects cost increases since last quarter, and positive number reflects cost reduction since last quarter.
There were no new variances during the quarter. The overall program total forecasted Cost Variance of
negative $88.60M in Table 3 is the same as reported in the third quarter and can be attributed to the following:
$1.16M positive variance in the Water Infrastructure group of projects is due to the following project:
Table 3. Cost Summary
Subprograms
Expenditures
To Date
($ Million)
(A)
Current
Approved
Budget
($ Million)
(B)
Q4/FY22-23
Forecast
Costs
($ Million)
(C)
Cost
Variance
($ Million)
(D = B - C)
Cost
Variance
Over
Reporting
Period *
($ Million)
(E )
Water Infrastructure $23.24 $155.87 $154.71 $1.16 -
Water Conveyance (Water) $18.47 $146.40 $145.24 $1.16 - Water Infrastructure Project
Development $4.77 $9.47 $9.47 - -
Power Infrastructure $82.82 $205.30 $272.28 ($66.98) -
Powerhouse $49.08 $118.58 $183.67 ($65.09) -
Switchyard & Substations (Power) $22.63 $34.25 $36.14 ($1.89) - Transmission Lines $7.48 $37.97 $37.97 - -
Power Infrastructure Project
Development $3.63 $14.50 $14.50 - -
Joint Infrastructure $148.88 $501.13 $523.91 ($22.78) - Water Conveyance (Joint) $6.92 $47.25 $47.25 - -
Dams & Reservoirs (Joint) $12.32 $136.88 $149.87 ($12.98) - Mountain Tunnel $116.60 $238.22 $238.22 - -
Roads & Bridges (Joint) $2.76 $29.37 $29.37 - -
Tunnels (Joint) $1.34 $8.43 $14.99 ($6.56) -
Utilities (Joint) $1.47 $8.79 $12.03 ($3.23) -
Joint Infrastructure Project
Development $7.47 $32.18 $32.18 - -
Overall Program Total $254.94 $862.31 $950.91 ($88.60) - 4 HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23) o The 10035574 SJPL Tesla Valves Replacement forecasted cost is $1.16M lower than the approved budget.
$66.98M negative variance in the Power Infrastructure group of projects is due to the combined positive and negative variances in the following projects:
o The 10014075 Holm and Other Powerhouse Projects forecasted cost is $0.37M lower than the approved budget.
o The 10014086 Moccasin Powerhouse and GSU Rehabilitation forecasted cost is $39.80M higher than the approved budget.
o The 10036809 Moccasin Powerhouse Bypass Upgrades forecasted cost is $25.66M higher than the approved budget.
o The 10014087 Warnerville Substation Rehabilitation forecasted cost is $1.89M higher than the approved budget.
$22.78M negative variance in the Joint Infrastructure group of projects is due to the combined positive and negative variances in the following projects:
o The 10030758 OSH Dam Access and Drainage forecasted cost is $0.10M lower than the approved budget.
o The 10014115 Cherry Dam Spillway - Short Term Improvements forecasted cost is $12.99M higher than the approved budget.
o The 10032903 O’Shaughnessy Dam Outlet Works Phase 1 forecasted cost is $0.09M higher than the approved budget.
o The 10014108 Canyon Tunnel Rehabilitation forecasted cost is $6.56M higher than the approved budget.
o The 10014110 Moccasin Wastewater Treatment Plant forecasted cost is $3.23M higher than the approved budget.
In general, most of the forecasted cost variances noted above were first reported in the second quarter and align with budget adjustments proposed in the FY2024-2033 10-Year CIP; specific project variances are explained in Section 7 of this report.
4. PROGRAM SCHEDULE SUMMARY
Figure 4 and Table 4 compare the FY23 – 32 CIP Approved Schedule and the Current Forecast
Schedule for the HCIP. As shown in Table 4, the overall HCIP is currently both approved and forecast to be completed in October 2035.
Figure 4. Program Schedule Summary
5 HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23) * “A” is used after a date to reference an actual date as opposed to a forecast or approved date.
5. BUDGET AND SCHEDULE TREND SUMMARY
This Table 5 contains all approved HCIP projects that are active and in any of the planning, design, bid and award, or construction phases. The table excludes all Project Development accounts, as well as any projects that are either not-initiated, on-hold, in closeout, or completed.
During this Quarter (Q4 FY22-23), the following major project milestones were achieved:
Project completion of SJPL Tesla Valves Replacement
95% Design for SJPL Valve and Safe Entry Improvement (Phase 2) 35% Design for Moccasin Powerhouse and GSU Rehabilitation (Phase 3) Construction Final Completion for Moccasin Powerhouse and GSU Rehabilitation (Phase 1) Conceptual Engineering Report (CER) for Warnerville Substation Rehabilitation (Phase C) 35% Design for Warnerville Substation Rehabilitation (Phase C) 35% Design for Bridge Replacement (Subproject 2)
Table 4. FY23-32 CIP Approved vs. Current Forecast Schedule Dates
Sub-Program
CIP
Approved
Project
Start
Actual
Start
CIP
Approved
Completion
Current
Forecast
Completion
Schedule
Variance
(Months)
Water Infrastructure 03/26/12 03/26/12 A* 06/30/33 06/30/33 - Power Infrastructure 05/29/12 05/29/12 A* 10/30/35 10/30/35 - Joint Infrastructure 10/03/11 10/03/11 A* 06/30/33 06/30/33 - Overall
HCIP Projects 10/03/11 10/03/11 A* 10/30/35 10/30/35 - 6 All Costs are shown in million
Approved
Budget
Approved
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
ab c d ef g hijkl m n
Water Infrastructure
$3.7 12/30/22 $7.4 06/28/24 $7.4 06/28/24 $7.4 06/28/24 $7.4 06/28/24 $3.7 12/30/22 $2.6 06/30/23 10035575 - SJPL Valve and Safe Entry
Improvement
Phase 1A
Phase 1B
Phase 2
Phase 3
Power Infrastructure
$15.0 12/01/27 $15.0 12/01/27 $40.7 12/01/27 TBD TBD TBD TBD TBD TBD $40.7 12/01/27 10014086 - Moccasin Powerhouse and GSU
Rehabilitation
Phase 1
Phase 2
Phase 3
10014087 - Warnerville Substation Rehabilitation
Phase A (DB-127R)
Phase B
Phase C
$38.0 01/31/25 $38.0 01/31/25 $38.0 01/31/25 $38.0 01/31/25 $38.0 01/31/25 $38.0 01/31/25 $38.0 01/31/25 Joint Infrastructure
$47.3 02/28/28 $13.2 12/31/24 TBD TBD TBD TBD TBD TBD TBD TBD $47.3 02/28/28 FY23-32 07/01/19
10/04/17 (Phase A),
N/A (Phase B) &
02/28/25 (Phase C)
Q4 - FY22-23
11/25/26
10/03/18 $66.7 $106.5
10014088 - Moccasin Penstock Rehabilitation
FY23-32 02/01/16 12/21/23 01/31/24 06/10/24
FY23-32
09/01/15 (Phase A),
07/01/20 (Phase B) &
01/01/21 (Phase C)
$27.2$34.2 11/25/26
10035721 - Transmission Lines 7/8 Upgrades
Project Name
FY23-32 09/18/2010036809 - Moccasin Powerhouse Bypass
Upgrades
FY23-32 01/04/16
10035574 - SJPL Tesla Valves Replacement
04/15/25 Q4 - FY22-23
Q4 - FY22-2303/19/2112/07/20
2 $66.7 $66.7 $106.5 12/29/2812/03/2712/03/2712/29/28
03/04/20
04/13/27
02/29/16 (Phase A),
04/29/22 (Phase B) &
04/28/23 (Phase C)
04/01/16 (Phase A),
04/22/21 (Phase B) &
06/30/23 (Phase C)
12/24/16 (Phase A),
08/16/21 (Phase B) &
04/04/24 (Phase C)
07/01/25
Project Initiation
07/01/19
$66.7 12/03/27 $18.0
FY23-32
$142.7 03/13/28 $95.3
Most Recent CIP
Approved Budget
FY23-32
$142.7 03/13/28$95.3 07/01/25 $98.9 03/13/28
Current StatusCER Awarded Construction135% Design 95% Design Q4 - FY22-23
11/17/20 04/06/21 Q4 - FY22-23
03/13/28
05/01/19 11/27/20 07/28/20
$142.7 03/13/28$142.7
Q4 - FY22-23
01/08/2503/31/23 11/30/23 07/31/24
05/14/21
07/29/19 (Phase 1),
10/01/19 (Phase 2) &
06/05/23 (Phase 3)
09/09/20 (Phase 1),
05/11/22 (Phase 2) &
01/16/24 (Phase 3)
06/07/21 (Phase 1),
08/15/22 (Phase 2) &
12/31/25 (Phase 3)
Q4 - FY22-23
07/14/21 (Phase 1A),
10/29/21 (Phase 1B),
05/30/23 (Phase 2) &
03/31/23 (Phase 3)
03/8/22 (Phase 1A),
08/23/22 (Phase 1B),
02/21/24 (Phase 2) &
01/17/24 (Phase 3)
Table 5. Budget and Schedule Trend Summary
$34.2 $34.2 $34.2 $36.1$24.3
09/24/21 09/08/22
11/25/26 11/25/26 11/25/26 11/25/26
04/16/21
03/03/21 (Phase 1A),
05/28/21 (Phase 1B),
08/19/22 (Phase 2) &
12/30/21 (Phase 3)
7 All Costs are shown in million
Approved
Budget
Approved
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
Forecast
Cost
Forecast
Completion
ab c d ef g hijkl m n
Project Name
Project Initiation Most Recent CIP
Approved Budget Current StatusCER Awarded Construction135% Design 95% Design 10032903 - O'Shaughnessy Dam Outlet Works
Phase I3
Subproject A
Subproject B
Subproject C
Subproject D (Planning Only)
Subproject E (Planning Only)
$73.2 06/30/28 $83.2 07/01/27 TBD TBD TBD TBD TBD TBD TBD TBD $73.2 06/30/28 $11.9 07/01/27 $11.9 07/01/27 TBD TBD TBD TBD TBD TBD TBD TBD $24.9 11/01/27 $238.2 06/03/27 $114.0 12/30/21 $246.1 12/31/26 $238.2 12/31/26 $238.2 12/31/26 $238.2 06/03/27 $238.2 06/03/27 10035086 - Bridge Replacement
Subproject 1
Subproject 2
$8.4 09/01/26 $0.5 06/30/16 $15.0 12/30/26 $8.0 06/30/18 TBD TBD TBD TBD $15.0 12/30/26 $8.8 04/07/26 $8.8 04/07/26 - - $8.8 04/07/26 $12.0 04/07/26 TBD TBD $12.0 04/07/26 Footnotes:
1. This represents forecast project cost and project completion date at the time of award of construction contract (or award of CM/GC or Design-Build contracts/packages).
2. This represents the date the Design Criteria Report (DCR) was finalized for Transmission Lines 7/8 Upgrade project. CER was not required for the project.
3. This represents that Contract A will be doing Progressive Design Build during Construction. Contract B is in the process of finalizing the design. Contract D & E will not be doing CER .
03/20/24
10014108 - Canyon Tunnel Rehabilitation
10014114 - Mountain Tunnel Improvement Project
3/29/24 (Subproject 1) &
03/17/23 (Subproject 2)
Q4 - FY22-23
TBD
FY23-32
11/03/24 (Subproject 1) &
05/27/23 (Subproject 2)
05/02/25 (Subproject 1) &
01/12/24 (Subproject 2)
10/30/25 (Subproject 1) &
03/18/25 (Subproject 2)
TBD TBD $29.4 12/30/2707/01/27$29.4 $44.3 12/30/25 $29.4 12/30/27 $29.4 12/30/27 TBD 10014115 - Cherry Dam Spillway - Short Term
Improvements
FY23-32 03/01/21 03/29/24 06/28/24 10/30/24 06/16/25 Q4 - FY22-23 10014110 - Moccasin Wastewater Treatment Plant4
FY23-32 01/03/22
FY23-32 02/27/20 Q4 - FY22-23
FY23-32 10/03/11 12/29/17 05/15/18 07/31/19 10/13/20 Q4 - FY22-23 - 04/29/22 03/23/23
07/28/26 Q4 - FY22-23
08/31/23 (Subproject A),
05/28/24 (Subproject B) &
06/13/23 (Subproject C)FY23-32 02/01/18
09/30/21 (Subproject A),
Complete (Subproject B),
09/30/22 (Subproject C),
N/A (Subproject D) &
N/A (Subproject E)
12/15/23 (Subproject A),
N/A (Subproject B) &
11/25/22 (Subproject C)
$47.9 $17.2 $47.909/16/25 $47.9 $47.9 $47.9 $47.909/16/25 09/16/25 09/16/25 09/16/25 Q4 - FY22-23
03/31/24 (Subproject A),
N/A (Subproject B) &
12/23/22 (Subproject C)
10037351 - Moccasin Dam Long-Term
Improvements3
FY23-32 05/03/21 09/29/23 02/28/24 08/28/25
02/03/14 03/06/23 03/30/16 12/14/23 12/17/24 Q4 - FY22-23 09/16/2512/31/24
8 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23)
6. PROJECT PERFORMANCE SUMMARY* All costs are shown in $1,000s Project Name Active
Phase
(a)
CIP
Approved
Budget
(b)
Current
Approved
Budget
(c)
Current
Forecast
Cost
(d)
Expenditures
to Date
(e)
Cost
Variance
(f=c-d)
% Cost
Changes
(g=f/c)
CIP
Completion
Date
(h)
Approved
Completion
Date
(i)
Forecast
Completion
Date
(j)
Schedule
Variance
(Days)
(k=i-j)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
Water Infrastructure
Water Conveyance (Water)
10035575 SJPL
Valve and Safe
Entry
Improvement
MP $142,662 $142,662 $142,662 $16,079 $0 0% 03/13/28 03/13/28 03/13/28 0 Power Infrastructure
Powerhouse
10036809
Moccasin
Powerhouse
Bypass Upgrades
DS
$15,007 $15,007 $40,671 $1,157 ($25,664) (171%) 12/01/27 12/01/27 12/01/27 0 10014086
Moccasin
Powerhouse and
GSU
Rehabilitation
MP
$66,714 $66,714 $106,513 $27,655 ($39,799) (60%) 12/03/27 12/03/27 12/29/28 (392) Switchyard & Substations (Power)
10014087
Warnerville
Substation
Rehabilitation
CN $34,248 $34,248 $36,138 $22,629 ($1,890) (6%) 11/25/26 11/25/26 11/25/26 0 * Does not include projects in closeout, completed, not initiated,on hold, deleted projects, and projects combined with other projects. ** Phase Status Legend
PL Planning DS Design
BA Bid & Award CN Construction MP Multiple-Phase
Footnotes:
(+) CIP Approved Budget and Project Completion Date: The budget and schedule approved as part of 10-year CIP for FY23-32.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10- year CIP for FY23-32, plus any additional budget and schedule changes approved by the Commission as part of construction contract award.
(+++) Negative number reflects cost overrun (or schedule delay) and positive number reflects cost underrun (or ahead of schedule). Projects with a forecasted cost overrun greater than 10%, or forecasted delay of greater than 6 months or 10%, will be highlighted in grey. 9 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) Project Name Active
Phase
(a)
CIP
Approved
Budget
(b)
Current
Approved
Budget
(c)
Current
Forecast
Cost
(d)
Expenditures
to Date
(e)
Cost
Variance
(f=c-d)
% Cost
Changes
(g=f/c)
CIP
Completion
Date
(h)
Approved
Completion
Date
(i)
Forecast
Completion
Date
(j)
Schedule
Variance
(Days)
(k=i-j)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
Transmission Lines
10035721
Transmission
Lines 7/8
Upgrades
CN $37,969 $37,969 $37,969 $7,484 $0 0% 01/31/25 01/31/25 01/31/25 0 Joint Infrastructure
Water Conveyance (Joint)
10014088
Moccasin
Penstock
Rehabilitation
PL $47,251 $47,251 $47,251 $6,924 $0 0% 02/28/28 02/28/28 02/28/28 0 Dams & Reservoirs (Joint)
10032903
O'Shaughnessy
Dam Outlet Works
Phase I
DS $47,894 $47,894 $47,981 $5,673 ($87) 0% 09/16/25 09/16/25 09/16/25 0 10037351
Moccasin Dam &
Reservoir Long-
Term
Improvements
PL $73,176 $73,176 $73,176 $1,917 $0 0% 06/30/28 06/30/28 06/30/28 0 * Does not include projects in closeout, completed, not initiated,on hold, deleted projects, and projects combined with other projects. ** Phase Status Legend
PL Planning DS Design
BA Bid & Award CN Construction MP Multiple-Phase
Footnotes:
(+) CIP Approved Budget and Project Completion Date: The budget and schedule approved as part of 10-year CIP for FY23-32.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10- year CIP for FY23-32, plus any additional budget and schedule changes approved by the Commission as part of construction contract award.
(+++) Negative number reflects cost overrun (or schedule delay) and positive number reflects cost underrun (or ahead of schedule). Projects with a forecasted cost overrun greater than 10%, or forecasted delay of greater than 6 months or 10%, will be highlighted in grey. 10 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) Project Name Active
Phase
(a)
CIP
Approved
Budget
(b)
Current
Approved
Budget
(c)
Current
Forecast
Cost
(d)
Expenditures
to Date
(e)
Cost
Variance
(f=c-d)
% Cost
Changes
(g=f/c)
CIP
Completion
Date
(h)
Approved
Completion
Date
(i)
Forecast
Completion
Date
(j)
Schedule
Variance
(Days)
(k=i-j)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
10014115 Cherry
Dam Spillway -
Short Term
Improvements
PL
$11,861 $11,861 $24,856 $1,494 ($12,995) (110%) 06/30/27 06/30/27 11/01/27 (124) Mountain Tunnel
10014114
Mountain Tunnel
Improvement
Project
CN $238,219 $238,219 $238,219 $116,598 $0 0% 06/03/27 06/03/27 06/03/27 0 Roads & Bridges (Joint)
10035086 Bridge
Replacement
PL $29,371 $29,371 $29,371 $2,755 $0 0% 07/01/27 07/01/27 12/30/27 (182) Tunnels (Joint)
10014108 Canyon
Tunnel - Hetchy
Adit Rehabilitation
DS
$8,429 $8,429 $14,993 $1,344 ($6,564) (78%) 09/01/26 09/01/26 12/30/26 (120) Utilities (Joint)
10014110
Moccasin
Wastewater
Treatment Plant
DS
$8,795 $8,795 $12,029 $1,469 ($3,234) (37%) 04/07/26 04/07/26 04/07/26 0 * Does not include projects in closeout, completed, not initiated,on hold, deleted projects, and projects combined with other projects. ** Phase Status Legend
PL Planning DS Design
BA Bid & Award CN Construction MP Multiple-Phase
Footnotes:
(+) CIP Approved Budget and Project Completion Date: The budget and schedule approved as part of 10-year CIP for FY23-32.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10- year CIP for FY23-32, plus any additional budget and schedule changes approved by the Commission as part of construction contract award.
(+++) Negative number reflects cost overrun (or schedule delay) and positive number reflects cost underrun (or ahead of schedule). Projects with a forecasted cost overrun greater than 10%, or forecasted delay of greater than 6 months or 10%, will be highlighted in grey. 11 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23)
7. PROJECT STATUS REPORT
10035575 - SJPL Valve and Safe Entry Improvement
Project Description: The SJPL Entry
Assessment and Valve Improvement Project involves the three parallel transmission pipelines that stretch approximately 48-miles across the San Joaquin Valley from Oakdale Portal on the east to Tesla Portal near the City of Tracy on the west, with a partial fourth pipeline consisting of a 6.4-mile Eastern Segment and an 11-mile Western Segment. The four pipelines were built between 1932 and 2012, respectively, and range from 56- to 79.5-inches in diameter. Given the age and condition of the SJPLs, frequent maintenance and inspection are required. Work must be able to occur while the HHRWS is in service. The objective of this project is to upgrade valves and provide isolation points to allow safe entry into any and all sections of the SJPLs for inspection and maintenance while the remainder of the system stays in operation.
Program: Water Infrastructure Project Status: Multi-Phases Environmental Status: Active (Various) Project Cost:
Approved
Forecast
Actual
$ 142.66 M
$ 142.66 M
$ 16.08 M
Project Schedule:
Approved
Forecast
07/01/19
07/01/19
03/13/28
03/13/28
Project Percent Complete: 19.9%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast
A 01/27/22 A 12/25/21 A 05/16/22 A 09/13/24
B 01/27/22 A 04/21/22 A 11/07/22 A 09/11/24
C 01/27/22 A 09/14/23 03/02/24 05/24/27
D 08/10/22 A 09/02/23 04/10/24 07/24/25
Progress and Status:
This project is divided
into four (4) sub-projects, (A) Phase 1A
– Pipeline 2 Tesla & Oakdale Entry Improvements –
HH-1005; (B) Phase 1B – Pipelines 3&4 Tesla & Oakdale
Entry Improvements HH-1006; (C) Phase 2 - Pelican,
Roselle, Emery and P4J Entry Improvements; and (D) Phase 3 - Tesla Surge Tower. For Phase 1A, following the
successful system outage, the contractor focused on
materials fabrication and procurement for the next winter outage. For Phase 1B, the contractor completed the
submittals and began fabrication of the long-lead items including the new butterfly valves. For Phase 2, the project team completed 95% design on May 30th, and it is under
review. For Phase 3, the project team completed the 100% design and made progress on the contract administrative documents; the contract is planned to be advertised in
September. Based on the Engineers Estimate, the Phase 3 forecasted construction cost has increased due to additional scope for a water recirculation system, higher cost for escalation due to the one year delay, and higher materials cost for pipe and concrete.
Issues and Challenges:
The start of construction for Phase 3 (Tesla Surge Tower) has been delayed by approximately one year to incorporate design changes that address water quality concerns. The delay to Phase 3 will not affect the overall project completion date, as Phase 2 is the longest path for project completion.
Knife Gate Valves in Production [HH-1005]
12 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23)
10036809 - Moccasin Powerhouse Bypass Upgrades
Project Description: Provide a
reliable hydraulic bypass and energy dissipation system conveying water around the turbines to the Moccasin Reservoir Bypass Pipeline. Upgrade/replace high pressure energy dissipating valves, control systems, and associated structures that dissipate up to 325 million gallons per day (mgd) flow.
Program: Power Infrastructure Project Status: Design Environmental Status: Not Initiated (TBD)
Project Cost:
Approved
Forecast
Actual
$ 15.01 M
$ 40.67 M
$ 1.16 M
Project Schedule:
Approved
Forecast
09/18/20
09/18/20
12/01/27
12/01/27
Project Percent Complete: 11.8%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 08/26/24 08/27/24 04/26/25 06/01/27
Progress and Status:
The consultant began
the design phase in June 2023 for the
bypass system to be located outside of the Moccasin
Powerhouse and north of the Moccasin Penstocks. An
independent third-party cost estimate confirmed the project team’s forecasted higher construction costs due to scope refinement and increases in raw material cost. The final conceptual engineering report (CER) was approved by the Technical Steering Committee and issued for signatures in April 2023.
Issues and Challenges:
The CER construction cost estimate exceeds the current
approved budget by approximately $25M, as reported in the last quarter. The increase in the construction cost estimate from the Alternative Analysis Report to the CER can be
attributed to scope refinement, increase in raw material cost, and increase in construction labor cost.
Penstock Tie-in Point and Proposed Valve House Location
13 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10014086 - Moccasin Powerhouse and GSU Rehabilitation
Project Description: Moccasin Powerhouse Generators
were completed in 1969 and generate a combined maximum
output of 110 Megawatts. Both generator units have exceeded their life expectancy and need repair in order to continue operating reliably. The objective of this project is to replace stator cores and coils. The scope of work also includes entire field pole replacement. The project will also involve replacement of two generator step-up transformers (GSU's), and power plant systems upgrades including: replacing 480V switchgear, 13.8kV switchgear, motor control centers, main control boards, protective relays, cooling water piping, and improving oil containment systems.
Program: Power Infrastructure Project Status: Multi-Phases Environmental Status: Active (Various) Project Cost:
Approved
Forecast
Actual
$ 66.71 M
$ 106.51 M
$ 27.65 M
Project Schedule:
Approved
Forecast
01/04/16
01/04/16
12/03/27
12/29/28
Project Percent Complete: 50.3%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast
A 09/28/20 A 11/20/20 A 06/07/21 A 06/30/23 A
B 09/28/20 A 10/30/20 A 08/15/22 A 06/17/25
C 04/30/25 05/01/25 01/01/26 06/30/28
Progress and Status:
This project is divided into 3 subprojects, (A) Moccasin Powerhouse Generator Step-Up (GSU’s) Transformers
HH-1003R; (B) Moccasin Powerhouse Generators Rewind –
DB-121R2; and (C) Moccasin Powerhouse Systems
Upgrade. Subproject A, contract HH-1003R, achieved
Substantial Completion in March 2023, with Final Completion, including submittal of Record Documents, anticipated in July 2023. Subproject B, contract DB-121R2, will rehabilitate major generator components for both Generators M2 and M1.
For the Generator M2 rehabilitation the contractor is
scheduled to mobilize to the site in August 2023 for
construction, with Substantial Completion scheduled for April 2024. Generator M1 rehabilitation will follow M2 and is scheduled for Substantial Completion in April 2025. For subproject C, the 35% design package Moccasin
Powerhouse Systems Upgrade was issued in June 2023. The 35% construction cost estimate is expected in July 2023. The technical steering committee will review the 35% design package and cost estimate presentation in August 2023. The 65%
design
package
is
anticipated
in
January
2024.
Issues and Challenges:
The forecasted project cost exceeds the approved budget for the following reasons: Subproject A: HH-1003R had a
construction phase cost increase of about $4 million due to unforeseen site conditions and additional construction
management costs. Subproject B: DB-121R2 final completion is forecasted to be delayed one year due to supply chain issues; correspondingly, DB-121R2’s construction
management costs are expected to increase by about $2
million. Subproject C: Moccasin Powerhouse Systems
Upgrade project’s cost estimate at the end of conceptual engineering was higher than the previous estimate during the DB-121R2 Stator Frame, Sorel-Tracy, Quebec
needs assessment phase. The overall Subproject C’s cost increased $34 million due to additional scope, scope
refinement, higher construction and procurement costs,
additional construction management and support costs, and a one-year construction period extension to allow more time for coordination. The cost and schedule will continue to be reviewed and updated in future quarters once review of the 35% design package is completed.
14 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10014087 - Warnerville Substation Rehabilitation
Project Description: Provide the remaining
installation work for Warnerville Substation Rehabilitation project equipment that was deleted under Design Build Contract #DB-127R. A new construction contract will be issued to install the new equipment that has been procured and is on site, including replacement of four oil circuit breakers, relay protection, and other ancillary equipment.
Program: Power Infrastructure Project Status: Construction Environmental Status: Active (TBD) Project Cost:
Approved
Forecast
Actual
$ 34.25 M
$ 36.14 M
$ 22.63 M
Project Schedule:
Approved
Forecast
09/01/15
09/01/15
11/25/26
11/25/26
Project Percent Complete: 81.4%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast
A 03/31/16 A 01/24/17 A 10/05/17 A 03/31/24
B 12/29/23 09/06/24 03/01/25 02/28/26
Progress and Status:
This project is divided
into 3 subprojects. For Subproject A
Warnerville Substation Rehabilitation Phase 1 – DB-127R, the project team in coordination with the City Attorney’s office is working to close out the construction contract. For
Subproject B Warnerville “breaker failure contingency plan” HH-1008 (which would be issued only if needed), the
contingency contract would provide emergency temporary
replacement of any breakers that fail until they can be permanently replaced. The contracting strategy for this work that would only be required in the event of breaker failure is still being determined. For Subproject C Warnerville
Substation Rehabilitation Phase 2, the design team began final design and is working on the 35% design package
submittal which is anticipated by November 2023.
Issues and Challenges:
The forecasted cost is higher than the approved budget due to higher forecasted construction management costs to
administer the Subproject C (Phase 2) construction contract and to provide specialized electrical inspection services and start-up and commissioning support needed for this highly technical electrical project.
Top: Example of 35% Design Package Drawing
Bottom: High Voltage Disconnect Switches (WSR Phase II) 15 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10035721 - Transmission Lines 7/8 Upgrades
Project Description: This project develops
the scope of work, design, and contract documents necessary to bid, award, and manage the reconductoring contract. Reconductoring will include replacement of the existing 115kV conductors on Lines 7/8 from Warnerville to Standiford substations, resulting in improved transmission tower stability, and resolved clearance detections. The project will be partially funded by independent power generators interconnecting on the California Independent System Operator (CAISO) and the Transmission Line Clearance Mitigation Project (10014089).
Program: Power Infrastructure Project Status: Construction Environmental Status: Completed (Permitting Only)
Project Cost:
Approved
Forecast
Actual
$ 37.97 M
$ 37.97 M
$ 7.48 M
Project Schedule:
Approved
Forecast
12/02/19
12/02/19
01/31/25
01/31/25
Project Percent Complete: 24.5%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 11/04/21 A 02/11/22 A 09/28/22 A 07/26/24 Progress and Status:
The contractor continued foundation
construction at the
existing tower legs and is making good progress. Temporary overhead transmission line crossing structures have been completed at all road, railroad, and adjacent overhead utility crossings. All long lead materials have been ordered and deliveries are arriving and being stored on-site.
Issues and Challenges:
None at this time.
Rebar and Foundation Pour at Structure 571S [HH-1007]
16 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10014088 - Moccasin Penstock Rehabilitation
Project Description: Moccasin Penstock was
built in the early 1920's and conveys water from Moccasin Tunnel to Moccasin Powerhouse. A Condition Assessment Report, Phase I was submitted in 2011 by CH2MHill. The reports identified numerous deficiencies. The penstocks contain segments of hammer forged welded steel (HFWS) that has experienced failures in the past. The proposed scope of this project includes rehabilitation of anchors blocks, penstock coating, penstock saddle, air valves, large diameter butterfly valves, bifurcation sections and flow meters; and upgrade of electrical system, power transformers, standby generator in the West Portal Valve House, and bulkhead isolation valves in the surge tower.
The proposed project budget detailed below does not include the replacement of all HFWS pipes. This project will continue with the planning phase and further investigate if the HFWS in its' current condition meets the 100-year life span criteria.
The existing allocated funds will be sufficient through Planning and Design Phases. The additional funding request is for additional scope in construction.
Program: Joint Infrastructure Project Status: Planning Environmental Status: Active (TBD) Project Cost:
Approved
Forecast
Actual
$ 47.25 M
$ 47.25 M
$ 6.92 M
Project Schedule:
Approved
Forecast
02/01/16
02/01/16
02/28/28
02/28/28
Project Percent Complete: 15.7%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 10/07/24 10/08/24 04/16/25 08/24/27
Progress and Status:
During the quarter, workshops
were held with fifteen (15)
panelists to score and rank alternatives for full penstock replacement. The workshops were focused on five criteria: 1) Right of Way, 2) Environmental, 3) Constructability, 4) Operational, and 5) Lifecycle Cost. The project team collected scores, ranked alternatives, and updated a draft Alternatives Analysis Report based on input from the 15 panelists. The draft preferred alternative is a shaft and tunnel with pipeline connections. Additional workshops will be held next quarter with SFPUC management teams to review the selection
process and present the preferred alternative. The draft Alternatives Analysis Report was reviewed by the project team and the evaluation panelists during the quarter.
Issues and Challenges:
The forecasted cost for each of the replacement alternatives is higher than the approved budget which was based on
rehabilitation of the existing penstocks. An updated cost estimate will be performed for the preferred alternative and resulting forecasted project cost increase will be reported in the future. The forecasted schedules for replacement
alternatives are longer than the approved schedule for
rehabilitation only. Additional recommended project budget and schedule will be requested in the next 10-Year CIP
budget cycle.
Coating of exposed pipes upon completion of Phased Array Ultrasonic Testing
17 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10032903 - O'Shaughnessy Dam Outlet Works Phase I
Project Description: O'Shaughnessy Dam (OSH)
was completed in 1923 and raised in 1938. The original outlet works including gates and valves have been in services for more than 98 years. Inspections, condition assessments, and studies concluded that improvements and refurbishments of the outlet works system are needed to ensure safety and reliability.
The work will be implemented in two phases. This project is to cover the Phase 1 work. The O’Shaughnessy Dam Outlet Works Phase 1 Project addresses the identified deficiencies of the existing outlet works system at OSH. Phase 1 will include five projects: (1) supply and installation of nine new bulkheads; (2) improvements to the existing dam drainage system, repair cracks and joints, and lighting; (3) replacement of existing Instream Flow Release (IFR) valves; (4) NAR and AAR for twelve existing slide gates; and (5) NAR and AAR for the existing drum gates.
Program: Joint Infrastructure Project Status: Design Environmental Status: Active (TBD) Project Cost:
Approved
Forecast
Actual
$ 47.89 M
$ 47.98 M
$ 5.67 M
Project Schedule:
Approved
Forecast
02/01/18
02/01/18
09/16/25
09/16/25
Project Percent Complete: 16.9%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast
A 12/02/22 A 01/13/23 A 09/03/24 07/02/25
B 07/16/20 A 11/01/23 06/26/24 05/21/25
C 12/02/22 A 03/13/23 A 09/29/23 06/26/25
Progress and Status:
Subproject A (Bulkhead):
During this quarter, the progressive-
design-build contract DB-135 for the design and construction of the new bulkhead system, was awarded. Work under
DB-135 is scheduled to begin on September 1, 2023.
Subproject B (Drainage & Misc. Dam Improvements): The
drawings and specifications for the improvements are being prepared for advertisement to bid in October 2023.
Subproject C (Instream Flow Release Valve Replacement): A JOC contract for modification of the tunnel access building and the construction contract HH-1011 for the instream flow release valve replacement were awarded. Construction under the JOC and HH-1011 are each scheduled to start next
quarter. Subprojects D (Slide Gate) and E (Drum Gate): The engineering consultant continued work on the needs
assessment.
Issues and Challenges:
None at this time.
O'Shaughnessy Dam Outlet Valve Release
18 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10037351 - Moccasin Dam & Reservoir Long-Term Improvements Project Description: The flow capacity
of the existing spillway is inadequate to protect the Moccasin Dam against overtopping and erosion from severe flood events. The dam almost overtopped during the March 2018 storm event when flows were released from the auxiliary spillway and caused significant damage to the auxiliary spillway. The surrounding areas and the upstream diversion dam also sustained damage from the flood. This project is needed for dam safety. The objective of this project is to increase the spillway flow capacity to allow safe passage of flood flows without overtopping the dam and to protect the associated facilities within the Moccasin reservoir boundary against flood damages.
Program: Joint Infrastructure Project Status: Planning Environmental Status: Not Initiated (TBD)
Project Cost:
Approved
Forecast
Actual
$ 73.18 M
$ 73.18 M
$ 1.92 M
Project Schedule:
Approved
Forecast
05/03/21
05/03/21
06/30/28
06/30/28
Project Percent Complete: 3.4%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 11/03/26 05/07/26 09/03/26 12/30/27
Progress and Status:
The engineering consultant completed
and submitted a draft
conceptual engineering report (CER) with conceptual details, engineering evaluation, and cost estimate for the new
auxiliary spillway. The physical hydraulic model of the proposed auxiliary spillway was constructed, and a
demonstration flow test was performed using the model at the Northwest Hydraulic Consultants hydraulic laboratory.
Issues and Challenges:
The draft CER indicated a longer construction period and higher construction cost estimate than in the approved
budget. Additional work including geotechnical investigation, hydraulic studies, and review of the preliminary design details and constructability are being performed to confirm the schedule and cost for this project. The project assumptions for construction shutdown limitations and operational criteria are being revisited to explore potential cost savings.
Forecasted cost increase for the project will be reported after an updated cost estimate with any selected revised
assumptions has been performed.
Moccasin Dam and Spillway
19 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10014115 - Cherry Dam Spillway - Short Term Improvements Project Description: A spillway release
from Cherry Dam in 2010 caused a landslide, blockage of the spill channel, and extensive erosion in the close proximity of the dam’s right abutment. In addition, it caused flooding of the Cherry Power Tunnel Adit, and flooding of a campground further downstream. Engineering studies determined that significant long-term improvements to increase the spillway flow capacity are needed to maintain dam safety. The objective of this project is to re-establish containment for the breached spill channel section and to protect the downstream slope of the existing embankment dam from uncontrolled releases and erosion in the interim until the long-term improvements are implemented.
Program: Joint Infrastructure Project Status: Planning Environmental Status: Active (TBD) Project Cost:
Approved
Forecast
Actual
$ 11.86 M
$ 24.86 M
$ 1.49 M
Project Schedule:
Approved
Forecast
03/01/21
03/01/21
06/30/27
11/01/27
Project Percent Complete: 15.2%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 12/27/24 12/30/24 09/03/25 05/04/27
Progress and Status:
During the quarter, the project team evaluated the design and environmental review requirements for the proposed
alternatives. The inclusion of scope for the lower spill channel section would result in a longer project duration and higher construction cost. The team is evaluating the project
assumptions to determine impact to operations from potential cost-saving options such as limiting the scope of work to confine improvements to the upper channel area only.
Issues and Challenges:
The forecasted project cost for improvement to both the upper and lower spill channel sections is higher than the approved budget for just the upper section. However, the longer project duration due to increased environmental
requirements for the lower section has caused the team to reconsider limiting the scope of the project. Revised budget and schedule forecasts will be reported in the next quarter.
Cherry Valley Dam Spillway
20 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23)
10014114 - Mountain Tunnel Improvement Project
Project Description: Mountain Tunnel
conveys the SFPUC water supply from Kirkwood Powerhouse to Priest Reservoir.
Mountain Tunnel has been in service since 1925. Due to its age, deferred maintenance, and construction deficiencies in the early 1900s, sections of the tunnel lining have deteriorated, some extensively. This 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 reliably provide drinking water to customers for the next 100 years. The flow control structure and isolation valves will also be used to isolate the tunnel from Priest Reservoir during tunnel shutdowns. This will allow the reservoir to remain full and not backwater for over 8 miles into the dewatered tunnel. The full reservoir provides more supply water for safely extending the tunnel shutdowns to longer durations of 100 days for construction inside the tunnel. These longer outages will reduce the need for more typical 60-day outages and shorten the overall duration of the construction schedule.
Program: Joint Infrastructure Project Status: Construction Environmental Status: Completed Project Cost:
Approved
Forecast
Actual
$ 238.22 M
$ 238.22 M
$ 116.60 M
Project Schedule:
Approved
Forecast
10/03/11
10/03/11
06/03/27
06/03/27
Project Percent Complete: 52.2%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 01/14/20 A 11/13/19 A 01/29/21 A 12/03/26 Progress and Status:
During this quarter
significant construction work was
completed at the Priest Reservoir site, including
waterproofing within the shaft of the Flow Control Facility, installing rebar in the second lift of the shaft’s concrete final lining, pressure grouting of the Priest adit to mitigate water intrusion, applying shotcrete as a smoothing layer to the Priest adit for the waterproofing membrane, and installing additional rock bolts for ground support. Rickson Road
improvements continued and are nearing completion;
completed improvements include a long gabion retaining wall.
Storm damage repair work took place along Adit 5/6 Road and included completion of a large cut wall. Storm damage repair work began at Second Garrote Road after obtaining environmental clearance. Discussions regarding South Fork are now focused on added safety improvements to allow
completion of the original design.
Issues and Challenges:
None at this time.
Completed waterproofing in Flow Control Facility shaft
21 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23)
10035086 - Bridge Replacement
Project Description: HHWP is
responsible for maintaining 14 bridges located in the Cherry, Eleanor and Hetch Hetchy region. Condition assessment has identified the need for rehabilitation and/or replacement (age and to meet current seismic design criteria). Two of the fourteen bridges require substantial modification or replacement and have been combined into this project. This project includes rehabilitation and/or replacement of O'Shaughnessy Adit Access Bridge; and Lake Eleanor Dam Bridge. The Lake Eleanor Dam Bridge is a structural component of the Lake Eleanor Dam which is integral to the structural/seismic integrity of the arch dam and should be addressed immediately. The O'Shaughnessy Adit Access Bridge was built in 1960. It is approximately 84 feet long and is a four-span simply supported bridge with a timber deck and concrete piers. It is located right at the downstream of O'Shaughnessy Dam and provides on land two-way access to Canyon Tunnel.
Program: Joint Infrastructure Project Status: Planning Environmental Status: Active (Various) Project Cost:
Approved
Forecast
Actual
$ 29.37 M
$ 29.37 M
$ 2.76 M
Project Schedule:
Approved
Forecast
02/27/20
02/27/20
07/01/27
12/30/27
Project Percent Complete: 10.7%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast
A 05/16/25 07/17/25 11/19/25 02/06/27
B 09/30/24 10/01/24 05/01/25 06/30/27
Progress and Status:
This project is
divided into 2 subprojects, (A) Lake Eleanor
Dam Bridge; and (B) O’Shaughnessy Adit Access Bridge. For the Lake Eleanor Dam Bridge, the project alternatives were evaluated, scored and ranked. The draft alternatives analysis including the preferred alternative for a new bridge is being finalized. For the O’Shaughnessy Adit Access Bridge, the project team is performing a new load assessment of the bridge and inspection of the bridge’s substructure to confirm the load rating of the bridge and rehabilitation requirements.
The selected alternative is being assessed for potential environmental requirements, including wetland delineation, golden eagle and California spotted owl surveys, ambient noise measurement, archeological survey, and historic
resources evaluation. The U.S. National Park Service,
Yosemite National Park, and the environmental consultant are supporting the project team in developing the
Environmental Impact Report (EIR).
Issues and Challenges:
The bridge replacement project schedule is forecasted to be delayed due to the requirement for an Environmental Impact Report for construction of the O’Shaughnessy Adit Access Bridge sub-project in compliance with the California
Environmental Quality Act (CEQA) and also to increase the duration of the Bid & Award phase based on recent contract bidding history. The alternatives analysis and planning phase for the Lake Eleanor Dam Bridge is delayed for the team to re-evaluate the scope and approach to reduce project cost and address environmental and operation requirements.
Lake Eleanor Dam and Bridge
22 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10014108 - Canyon Tunnel - Hetchy Adit Rehabilitation
Project Description: Canyon Tunnel was
built over 55 years ago. A condition assessment was performed on the tunnel in 2009 and the tunnel is in generally good condition with the exception of the Hetchy Adit, a tunnel access point. Temporary repairs have been made to the "plug" at this adit twice (1989, 2009), but permanent repairs are needed to reduce leakage and increase reliability of the system. Project scope includes installation of a new reinforced concrete plug downstream of the existing plug. This project is being delayed because of boundary correction issues.
Program: Joint Infrastructure Project Status: Design Environmental Status: Active (TBD) Project Cost:
Approved
Forecast
Actual
$ 8.43 M
$ 14.99 M
$ 1.34 M
Project Schedule:
Approved
Forecast
02/03/14
02/03/14
09/01/26
12/30/26
Project Percent Complete: 17.5%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 12/29/23 08/01/24 04/01/25 06/30/26
Progress and Status:
The project team reviewed
and revised the 95% design
package, incorporating a new horizontal directional drilling method for the project. It is anticipated that the 95% design package will be finalized by next quarter. The proposed facility improvement is being assessed for potential
environmental requirements, including wetland delineation, golden eagle and California spotted owl surveys, ambient noise measurement, archeological survey, and historic
resources evaluation. The National Park Service, Yosemite National Park, and the environmental consultant are
supporting the Canyon Tunnel - Hetchy Adit Rehabilitation project team to develop the Environmental Impact Report.
Issues and Challenges:
The project forecast completion date was extended to
account for preparation of the Environmental Impact Report.
Additional rock excavation, installation of Air vent pipes, platform upgrades, and work in the National Park Service area are the main factors behind the construction cost
increase.
Inside Hetchy Adit to Evaluate Geologic Condition of the Proposed Bulkhead Location
23 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23) 10014110 - Moccasin Wastewater Treatment Plant
Project Description: The Moccasin Wastewater Treatment
Plant (WWTP) provides primary treatment of wastewater from Moccasin Compound prior to discharging the treated water to a nearby spray field. The WWTP was constructed in the 1970s and has been in continuous operation since its installation. The WWTP has reached the end of its reliable service life, and is becoming increasingly maintenance intensive. The scope of work is to replace the existing plant with a package two-train sequencing batch reactor (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.
Program: Joint Infrastructure Project Status: Design Environmental Status: Active (TBD) Project Cost:
Approved
Forecast
Actual
$ 8.79 M
$ 12.03 M
$ 1.47 M
Project Schedule:
Approved
Forecast
01/03/22
01/03/22
04/07/26
04/07/26
Project Percent Complete: 23.1%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 11/14/23 09/29/23 03/21/24 12/31/25
Progress and Status:
A 95% design package was reviewed and then updated to
incorporate the reviewers' comments. The final draft 100% design package was received at the end of the quarter and is undergoing review.
Issues and Challenges:
The increase in the forecasted project cost is due to a recent construction estimate, developed in 2022, that demonstrates increases in base construction cost, additional process equipment costs, additional site development costs,
increased escalation costs, costs of the medium voltage upgrade electrical work, and cost for a requested adjacent power pole replacement by Hetch Hetchy Water & Power.
Delay in the bid advertisement date is anticipated due to additional scope of work and hazardous material testing requirements to be incorporated into the final design
package.
Existing Moccasin Wastewater Treatment Plant
24 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23)
8. ON-GOING CONSTRUCTION*
Construction
Schedule Budget Variance
(Approved - Forecast) Percent
Contract
NTP Date
Approved
Construction
Final
Completion**
Current
Forecasted
Construction
Final
Completion
Approved
Contract
Cost
Current
Forecasted
Cost**
Schedule
(Cal Days) Cost
Complete
Water Infrastructure
10035575 - SJPL Valve & Safe Entry
Improvement - (Contract A, HH-1005)
05/16/22 09/13/24 09/13/24 $11,879,454 $11,879,454 0 $0 53.0% 10035575 - SJPL Valve & Safe Entry
Improvement - (Contract B, HH-1006)
11/07/22 09/11/24 09/11/24 $12,981,989 $12,981,989 0 $0 4.0% Power Infrastructure
10014086 - Moccasin Powerhouse
Transformers Installation - (Contract A,
HH-1003R)
06/07/21 05/23/23 05/23/23 $3,940,319 $3,940,319 0 $0 90.3% 10014086 - Moccasin Powerhouse
Generator Rehab - (Contract B,
DB-121R2)
06/21/21 06/17/24 09/30/25 $28,898,986 $28,898,986 (470) $0 27.5% 10014087 - Warnerville Substation -
(DB-127R)
10/05/17 03/31/24 03/31/24 $14,591,450 $14,591,450 0 $0 90.4% 10035721 - Transmission Lines 7/8
Upgrade - (HH-1007)
09/28/22 07/26/24 07/26/24 $26,378,155 $26,378,155 0 $0 9.6% Joint Infrastructure
10014114 - Mountain Tunnel
Improvement - (HH-1000R)
01/29/21 12/03/26 12/03/26 $142,892,740 $143,550,477 0 ($657,737) 45.1%
Approved Current Variance
Contract Cost Forecast Cost Cost Percent
Program Total for On-
Going Construction $241,563,093 $242,220,830 ($657,737) (0.3%) Note: * This table reflects Active Construction Contracts with an original contract amount greater than $1M. ** The Forecasted Cost includes all approved, pending, and potential change orders; and Final Completion includes all approved, pending, and potential change orders, and trends. 25 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23)
9. PROJECTS IN CLOSEOUT
Project Title
Current
Approved
Construction
Phase
Completion
Actual
Construction
Phase
Completion
Current
Approved
Construction
Phase Budget
Construction
Phase
Expenditures
To Date
Power Infrastructure
Powerhouse
10014075 - Holm and Other Powerhouse Projects 05/14/21 05/14/21 $12,959,275 $12,636,797 Joint Infrastructure
Dams & Reservoirs (Joint)
10030758 - OSH Dam Access and Drainage 08/21/22 01/10/23 $1,649,003 $1,586,355 TOTAL $14,608,278 $14,223,152
26 HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 - 06/30/23)
10. COMPLETED PROJECTS
Project Title
Approved
Project
Completion
Actual
Project
Completion
Approved
Project
Budget
Project
Expenditures
To Date
Water Infrastructure
10035574 - SJPL Tesla Valves Replacement 12/30/22 06/30/23 $3,740,000 $2,392,074 TOTAL $3,740,000 $2,392,074
27 This page is intentionally left blank
28 Appendices
APPENDICES
A PROJECT
DESCRIPTIONS
B APPROVED PROJECT L EVEL SCHEDULES / BUDGETS
C LIST OF ACRONYMS
HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23) This page is intentionally left blank
HClP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23) APPENDICES Q4-FY2022-2023 (04/01/23 - 06/30/23)
APPENDIX A. PROJECT DESCRIPTION
WATER INFRASTRUCTURE
Water Conveyance (Water)
10035574 SJPL Tesla Valves Replacement
This original project was to replace four large diameter butterfly valves, TUV 101 to 401, at Tesla Valve Vault so that the San Joaquin Pipelines (SJPL) could be safely isolated individually without the entire system shutdown. This would also improve safety to enter the pipelines for maintenance and inspection purposes. After the planning phase of the SJPL Valve and Safe Entry Improvement project (Project 10035575), it was recommended that the scope of the SJPL Tesla Valve Replacement be reduced to focus on completing the replacement of TUV101 only. The remainder of the work will be combined with the work of SJPL Valve and Safe Entry Improvement. The proposed baseline has been reduced by $3.64m, from $7.38m to $3.74m, to reflect this reduction in scope.
10035575 SJPL Valve and Safe Entry Improvement
The SJPL Entry Assessment and Valve Improvement Project involves the three parallel transmission pipelines that stretch approximately 48-miles across the San Joaquin Valley from Oakdale Portal on the east to Tesla Portal near the City of Tracy on the west, with a partial fourth pipeline consisting of a 6.4-mile Eastern Segment and an 11-mile Western Segment. The four pipelines were built between 1932 and 2012, respectively, and range from 56- to 79.5-inches in diameter. As part of the WSIP, valve vaults were constructed along the SJPL System at various locations to increase operational flexibility and the overall reliability of the SJPL System. The valves are not sufficiently rated for hydrostatic or transient/surge pressures resulting in an unsafe condition for personnel to enter the pipelines unless there is a complete shutdown of the Hetch Hetchy Regional Water System (HHRWS). Given the age and condition of the SJPLs, work must be able to occur while the HHRWS is in service. The objective of this project is to allow safe entry into any and all sections of the SJPLs for inspection and maintenance while the remainder of the system stays in operation. This project will allow for isolation of the pipelines to prevent a water engulfment hazard during a Permit-Required Confined Space (PRCS) entry of a pipeline. In addition, replacement of the butterfly valves TUV 201 through 401, originally planned under SJPL Tesla Valves Replacement will be completed under this project.
Water Infrastructure Project Development
10014072 WATER ONLY/PROJ DEV
The Project Development (PD) Account captures Program level expenditures. There are four types of charges that will be allocated to the PD Account: 1) Task orders for overall program management and project prioritization tasks, where the costs should be distributed over all CIP Projects. 2) Infrastructure and Hetchy staff performing program level tasks including: capital plan development, budget management (including fund management, and cost reallocations); Unifier and Quarterly Report generation tasks, where the costs should be distributed over all CIP Projects. 3) Portal support for the existing SharePoint Portal (includes document management and project dashboard reporting) 4) Work Outreach program.
A1
APPENDICES Q4-FY2022-2023 (04/01/23 - 06/30/23)
APPENDIX A. PROJECT DESCRIPTION CONT'D
POWER INFRASTRUCTURE
Powerhouse
10036809 Moccasin Powerhouse Bypass Upgrades
Provide a reliable hydraulic bypass and energy dissipation system conveying water around the turbines to the Moccasin Reservoir Bypass Pipeline. Upgrade/replace high pressure energy dissipating valves, control systems, and associated structures to absorb 1,147 feet of pressure head and 430 cubic feet per second flow without damage.
10014086 Moccasin Powerhouse and GSU Rehabilitation
Moccasin Powerhouse Generators were completed in 1969 and generate a combined maximum output of 110 Megawatts. Both generator units have exceeded their life expectancy and need repair in order to continue operating reliably. Since their original installation, the generators have not had any major maintenance work done (no rewinds or overhauls). The objective of this project is to replace stator cores and coils. The scope of work also includes entire field pole replacement, replacement of the rotor pole/rim tail connection system with a new T-tail connection system, and supply of a new rotor rim for each generator following inspection and testing. The project will also involve replacement of two generator step- up transformers (GSU's), and power plant systems upgrades including: replacing 480V switchgear, 13.8kV switchgear, motor control centers, main control boards, protective relays, cooling water piping, and improving oil containment systems. The work is divided into three phases: Phase 1 - Generator Rehabilitation Phase 2 - GSU Replacement Phase 3 - Power Plant Systems Upgrades. 10014075 Holm and Other Powerhouse Projects
PLEASE NOTE: This project has been replaced by 10036104 and will not be requesting any additional funding in the Capital Plan. The powerhouses are made up of the following systems: 1) Turbine and governors; 2) Generator and excitation; 3) Electrical - Power train, station service and protection systems; 4) Step-up transformers; and 5) Mechanical systems. Rehabilitation costs for categories 1, 2, and 4 above are estimated at about 85% of total powerhouse rehabilitation costs (excluding building costs) and will be performed by Infrastructure. This project will fund: 1) Project under categories 3 and 5; 2) Unplanned failures for all categories; and 3) Managing replacement of assets with shorter life expectancies. Examples of electrical and mechanical systems covered in this project include inverters, breakers in 480V switchgear, 480V Motor Control Centers, electrical protective relays, cooling water piping/tubing, turbine shut- off valve control water piping/tubing, station air compressor, SCADA/control system, and vibration monitoring.
10036810 Kirkwood Powerhouse Bypass Upgrades
Provide a reliable hydraulic bypass and energy dissipation system conveying water around the turbines to the Kirkwood Powerhouse Bypass Chamber and Mountain Tunnel. Upgrade/replace high pressure energy dissipating valves, control systems, and associated structures to absorb 1,245 feet of pressure head and 430 cubic feet per second flow without damage.
Switchyard & Substations (Power)
10014087 Warnerville Substation Rehabilitation
The additional funding request is to cover the remaining work for Warnerville Substation Rehabilitation project. Under Design Build Contract #DB-127R, installation of some 230kV equipment was deleted from A2
APPENDICES Q4-FY2022-2023 (04/01/23 - 06/30/23)
the contract but procured including circuit breakers, switches, insulators, and current voltage transformers. This remaining work includes the replacement of, four oil circuit breakers, bushings, surge arrestors, disconnect switches, current voltage transformer, insulators, relay protection, and other ancillary equipment. The Planning of the remaining work is expected to start in August 2020. Project Estimate is approximately $6.2 Million.
Transmission Lines
10035721 Transmission Lines 7/8 Upgrades
BACKGROUND: The San Francisco Public Utilities Commission (SFPUC) electric transmission lines 7/8 conveys power from Warnerville Substation to Modesto Irrigation District's Standiford Substation. The SFPUC must accommodate additional power flowing across its transmission system due to grid interconnection requests from independent power generators interconnecting on the California Independent System Operator (CAISO). This is a requirement for SFPUC and HHWP obligations as a neighboring provider of electric transmission service. Studies performed by the SFPUC indicate the principal impact to its system is an overload of 115kV Lines 7&8 between HHWP Warnerville Substation and MID Standiford Substation under contingency conditions if interconnections are made without modification to the system's capacity. Without modifications, the SFPUC and HHWP transmission system could face reliability issues. Reconductoring also resolves multiple locations where the clearance between the existing conductors and the ground or structures does not meet current safe clearance regulations.
DESCRIPTION: This project develops the scope of work, design, and contract documents necessary to bid, award, and manage the reconductoring contract. Reconductoring will include replacement of the existing 115kV conductors on Lines 7/8 from Warnerville to Standiford substations, resulting in improved transmission tower stability, and resolved clearance detections. The project will be partially funded by independent power generators interconnecting on the California Independent System Operator (CAISO) and the Transmission Line Clearance Mitigation Project (10014089).
Power Infrastructure Project Development
10014092 POWER ONLY/PROJ DEVELP
The Project Development (PD) Account captures Program level expenditures. There are four types of charges that will be allocated to the PD Account: 1) Task orders for overall program management and project prioritization tasks, where the costs should be distributed over all CIP Projects. 2) Infrastructure and Hetchy staff performing program level tasks including: capital plan development, budget management (including fund management, and cost reallocations); and Quarterly Report generation tasks, where the costs should be distributed over all CIP Projects. 3) Portal support for the existing SharePoint Portal (includes document management and project dashboard reporting) 4) Work Outreach program.
A3
APPENDICES Q4-FY2022-2023 (04/01/23 - 06/30/23)
APPENDIX A. PROJECT DESCRIPTION CONT'D
JOINT INFRASTRUCTURE
Water Conveyance (Joint)
10014088 Moccasin Penstock Rehabilitation
Moccasin Penstock was built in the early 1920's and conveys water from Moccasin Tunnel to Moccasin Powerhouse. A Condition Assessment Report, Phase I was submitted in 2011 by CH2MHill. The reports identified numerous deficiencies. The penstocks contain segments of hammer forged welded steel (HFWS) that has experienced failures in the past. This type of HFWS pipe has a history of brittle fracture failure at both Pacific Gas & Electric and Southern California Edison Penstocks. In addition, issues have been identified regarding the anchor/saddle system with respect to Alkali Reactive Silica which degrades the concrete. An Alternative Analysis Report and a Design Criteria report were submitted by MWH/Stantec in 2016. Due to lack of funds in the previous budget cycle, the project scope was reduced to limit the repair to one penstock. The design of the rehabilitation work for one penstock was completed and went out for bid.
Because of the 2018 March Storm event and concerns about the isolation point at West Portal, the construction contract was terminated before the contractor started work. In view of long term asset reliability, HHWP decides to revisit the scope to include the rehabilitation work of both penstocks and other upgrade. The proposed new scope of this project includes rehabilitation of anchors blocks, penstock coating, penstock saddle, air valves, large diameter butterfly valves, bifurcation sections and flow meters; and upgrade of electrical system, power transformers, standby generator in the West Portal Valve House, and bulkhead isolation valves in the surge tower. The proposed project budget detailed below does not include the replacement of all HFWS pipes. This project will continue with the planning phase in FY2018-19 and further investigate if the HFWS in its' current condition meets the 100-year life span criteria. The existing allocated funds will be sufficient through Planning and Design Phases. The additional funding request is for additional scope in construction.
Dams & Reservoirs (Joint)
10030758 OSH Dam Access and Drainage
The key objective of this project is to fall protection safety for Hetch Hetchy Water and Power (HHWP) operators inside the O'Shaughnessy Dam by installing fall protection systems that are in conformance with the updated Occupational Safety and Health Administration (OSHA) requirements, including ladders and landings with safety cage and/or fall restraint systems. 10032903 O'Shaughnessy Dam Outlet Works Phase I
O'Shaughnessy Dam (OSH) was completed in 1923 and raised in 1938. The original outlet works including gates and valves have been in services for more than 98 years. Inspections, condition assessments, and studies concluded that improvements and refurbishments of the outlet works system are needed to ensure safety and reliability. The work will be implemented in two phases. This project is to cover the Phase 1 work. The O’Shaughnessy Dam Outlet Works Phase 1 Project addresses the identified deficiencies of the existing outlet works system at OSH. Phase 1 will include five projects: (1) supply and installation of nine new bulkheads; (2) improvements to the existing dam drainage system, repair cracks and joints, and lighting; (3) replacement of existing Instream Flow Release (IFR) valves; (4) NAR and AAR for twelve existing slide gates; and (5) NAR and AAR for the existing drum gates. The existing control gates and valves are essential features for dam safety and reservoir operation. The project is needed to maintain safe and reliable operation of these aging assets. Failure or malfunction of these gates and valves will affect dam safety and result in reduction of storage and reduction of water deliveries to SFPUC customers.
A4
APPENDICES Q4-FY2022-2023 (04/01/23 - 06/30/23)
10037351 Moccasin Dam & Reservoir Long-Term Improvements The flow capacity of the existing spillway is inadequate to protect the Moccasin Dam against overtopping and erosion from severe flood events. The dam almost overtopped during the March 2018 storm event when flows were released from the auxiliary spillway and caused significant damage to the auxiliary spillway. The surrounding areas and the upstream diversion dam also sustained damage from the flood.
This project is needed for dam safety. The objective of this project is to increase the spillway flow capacity to allow safe passage of flood flows without overtopping the dam and to protect the associated facilities within the Moccasin reservoir boundary against flood damages. 10014115 Cherry Dam Spillway - Short Term Improvements
A spillway release from Cherry Dam in 2010 caused a landslide, blockage of the spill channel, and extensive erosion in the close proximity of the dam’s right abutment. In addition, it caused flooding of the Cherry Power Tunnel Adit, and flooding of a campground further downstream. Engineering studies determined that significant long-term improvements to increase the spillway flow capacity are needed to maintain dam safety. The objective of this project is to re-establish containment for the breached spill channel section and to protect the downstream slope of the existing embankment dam from uncontrolled releases and erosion in the interim until the long-term improvements are implemented.
Mountain Tunnel
10014114 Mountain Tunnel Improvement Project
Constructed between 1917-25, Mountain Tunnel (MT) is a critical, non-redundant link in the Hetch Hetchy water system, conveying SFPUC water supply from Kirkwood Powerhouse to Priest Reservoir. Due to the tunnel's 90 years of operation, deferred maintenance, as well as the construction deficiencies in the early 1900s, sections of the tunnel have deteriorated, some more extensively than others. MT improvements to enhance SFPUC's ability to provide reliable, high-quality water to its customers, will be carried out through three projects: 1. MT Adits & Access Improvement 2. MT Inspection and Repair 3. MT Tunnel Improvements. Mountain Tunnel Adits & Access Improvement Project will enlarge Adits 5/6 and 8/9 to accommodate quick entry of construction crews and equipment into the tunnel; and will improve access roads to the said adits. Mountain Tunnel Inspection & Repairs Project provides for a tunnel inspection in 2017 to update the Condition Assessment conducted in 2008, as well as short-term repairs in 2017 and 2018 to reduce the risk of failures in the concrete lining prior to the long-term project being implemented.
Mountain Tunnel Improvements (Rehabilitation) Project was selected for the design and construction of the preferred engineering alternative that will keep this vital component of the Hetch Hetchy Water and Power System in reliable service for years to come. Budget and schedule is based on the Mountain Tunnel Improvement which has an anticipated construction phase between from 2021 to 2027 (MRN 238-241, 244, 245) **This is the Water portion of the Mountain Tunnel project.
Roads & Bridges (Joint)
10035086 Bridge Replacement
HHWP is responsible for maintaining 14 bridges located in the Cherry, Eleanor and Hetch Hetchy region.
Condition assessment has identified the need for rehabilitation and/or replacement (age and to meet current seismic design criteria). Two of the fourteen bridges require substantial modification or replacement and have been combined into this project. This project includes rehabilitation and/or replacement of O'Shaughnessy Adit Access Bridge; and Lake Eleanor Dam Bridge. The Lake Eleanor Dam Bridge is a structural component of the Lake Eleanor Dam which is integral to the structural/seismic integrity of the arch dam and should be addressed immediately. The O'Shaughnessy Adit Access Bridge A5
APPENDICES Q4-FY2022-2023 (04/01/23 - 06/30/23)
was built in 1960. It is approximately 84 feet long and is a four-span simply supported bridge with a timber deck and concrete piers. It is located right at the downstream of O'Shaughnessy Dam and provides on land two-way access to Canyon Tunnel.
Tunnels (Joint)
10014108 Canyon Tunnel Rehabilitation
Canyon Tunnel was built over 55 years ago. A condition assessment was performed on the tunnel in 2009 and the tunnel is in generally good condition with the exception of the Hetchy Adit, a tunnel access point.
Temporary repairs have been made to the "plug" at this adit twice (1989, 2009), but permanent repairs are needed to reduce leakage and increase reliability of the system. Project scope includes installation of a new reinforced concrete plug downstream of the existing plug. This project is being delayed because of boundary correction issues.
Utilities (Joint)
10014110 Moccasin Wastewater Treatment Plant
The Moccasin Wastewater Treatment Plant (WWTP) provides primary treatment of wastewater from Moccasin Compound prior to discharging the treated water to a nearby spray field. The WWTP was constructed in the 1970s and has been in continuous operation since its installation. The WWTP has reached the end of its reliable service life, and is becoming increasingly maintenance intensive. The scope of work is to replace the existing plant with a package two-train sequencing batch reactor (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.
Joint Infrastructure Project Development
10014116 JOINT - PROJECT DEVELOPMENT
The Project Development (PD) Account captures Program level expenditures. There are four types of charges that will be allocated to the PD Account: 1) Task orders for overall program management and project prioritization tasks, where the costs should be distributed over all CIP Projects. 2) Infrastructure and Hetchy staff performing program level tasks including: capital plan development, budget management (including fund management, and cost reallocations); Unifier and Quarterly Report generation tasks, where the costs should be distributed over all CIP Projects. 3) Portal support for the existing SharePoint Portal (includes document management and project dashboard reporting) 4) Work Outreach program.
A6
Project Name Approved Budget Start Finish
Hetchy Capital Improvement Program $862,306,192.00 03-Oct-11 30-Oct-35 Hetch Hetchy Water Enterpise $862,306,192.00 03-Oct-11 30-Oct-35 Water Infrastructure $155,874,178.00 26-Mar-12 30-Jun-33 Water Conveyance (Water) $146,401,975.01 01-May-19 13-Mar-28 10035574 SJPL Tesla Valves Replacement $3,740,000.00 01-May-19 30-Dec-22 10035575 SJPL Valve and Safe Entry Improvement $142,661,975.00 01-Jul-19 13-Mar-28 Water Infrastructure Project Development $9,472,203.00 26-Mar-12 30-Jun-33 10014072 WATER ONLY/PROJ DEV $9,472,203.00 26-Mar-12 30-Jun-33 Power Infrastructure $205,300,184.00 29-May-12 30-Oct-35 Powerhouse $118,581,215.00 03-Sep-13 30-Oct-35
10014075 Holm and Other Powerhouse Projects $20,703,580.00 03-Sep-13 22-Aug-22 10014086 Moccasin Powerhouse and GSU Rehabilitation $66,713,635.00 04-Jan-16 03-Dec-27 10036809 Moccasin Powerhouse Bypass Upgrades $15,007,000.00 18-Sep-20 01-Dec-27 10036810 Kirkwood Powerhouse Bypass Upgrades $16,157,000.00 27-Feb-20 30-Oct-35 Switchyard & Substations (Power) $34,248,428.00 01-Sep-15 25-Nov-26 10014087 Warnerville Substation Rehabilitation $34,248,428.00 01-Sep-15 25-Nov-26 Transmission Lines $37,969,000.00 02-Dec-19 31-Jan-25
10035721 Transmission Lines 7/8 Upgrades $37,969,000.00 02-Dec-19 31-Jan-25 Power Infrastructure Project Development $14,501,541.00 29-May-12 30-Jun-33 10014092 POWER ONLY/PROJ DEVELP $14,501,541.00 29-May-12 30-Jun-33 Joint Infrastructure $501,131,830.00 03-Oct-11 30-Jun-33 Water Conveyance (Joint) $47,251,363.00 01-Feb-16 28-Feb-28 10014088 Moccasin Penstock $47,251,363.00 01-Feb-16 28-Feb-28 Dams & Reservoirs (Joint) $136,883,506.01 01-Mar-17 30-Jun-28 10032903 O'Shaughnessy Dam Outlet Works Phase I $47,894,099.00 01-Feb-18 16-Sep-25 10030758 OSH Dam Access and Drainage Improvements $3,952,211.00 01-Mar-17 28-Feb-23 10037351 Moccasin Dam Long-Term Improvements $73,176,231.00 03-May-21 30-Jun-28 10014115 Cherry Dam Spillway - Short T erm Improvemen $11,860,965.00 01-Mar-21 30-Jun-27 Mountain Tunnel $238,218,951.01 03-Oct-11 03-Jun-27
10014114 Mountain Tunnel Improvement Project $238,218,951.01 03-Oct-11 03-Jun-27 Road and Bridges (Joint) $29,370,881.00 27-Feb-20 01-Jul-27 10035086 Bridge Replacement (4 - Bridges) $29,370,881.00 27-Feb-20 01-Jul-27 Tunnels (Joint) $8,428,813.00 03-Feb-14 01-Sep-26
10014108 Canyon Tunnel Rehabilitation $8,428,813.00 03-Feb-14 01-Sep-26 Utilities (Joint) $8,794,549.00 03-Jan-22 07-Apr-26
10014110 Moccasin Wastewater Treatment Plant $8,794,549.00 03-Jan-22 07-Apr-26 Joint Infrastructure Project Development $32,183,767.00 25-Jun-12 30-Jun-33 10014116 JOINT - PROJECT DEVELOPMENT $32,183,767.00 25-Jun-12 30-Jun-33 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FQ3 FQ4 FQ1 FQ2 FY2022 FY2023 FY 2024 FY2025 FY2026 FY2027 FY2028 FY2029 FY 2030 FY2031 FY 2032 APPENDIX B. Hetch Hetchy Capital Improvement Program Approved Project Level Schedules/Budgets Project Management
Planning
Environmental
Design
Right-of-W ay
Bid & Award
Construction Mgmt
Construction
Closeout
Program Mgmt
A7
APPENDIX C. LIST OF ACRONYMS
AAR
BLM
CAISO
Alternative Analysis Report
Bureau of Land Management
California Independent System
Operator
CATEX Categorical Exemption
CCTV Closed-Circuit Television
CEQA California Environmental Quality Act
CER Conceptual Engineering Report
CIP Capital Improvement Program
CRT Coast Range Tunnel
DB Design, Build
DCR Design Criteria Report
DSOD Division of Safety of Dams
EMB Engineering Management Bureau
FCF Flow Control Facility
FY Fiscal Year
GSU Generator Step-Up
GWH Gigawatt Hours
HCIP Hetch Hetchy Capital Improvement Program
HH Hetch Hetchy
HHWP Hetch Hetchy Water and Power
HPH Holm Powerhouse
IFR Instream Flow Release
JOC Job Order Contract
KPH Kirkwood Powerhouse
MGD Million Gallons per Day
MID Modesto Irrigation District
MPH Moccasin Powerhouse
NAR Needs Assessment Report
NERC North American Electric Reliability Corporation
NTP Notice to Proceed
OSH O'Shaughnessy Dam
PD Project Development
PG&E Pacific Gas and Electric Company
PLC Programmable Logic Controllers
PSI Per Square Inch
R&R Renewal and Replacement
SBR Sequence Batch Reactor
SCADA Supervisory Control and Data Acquisition
SFPUC San Francisco Public Utilities Commission
SJPL San Joaquin Pipeline
TSC Technical Steering Committee
TTF Tesla Treatment Facility
TUV Tesla Ultra Violet
TVH Tesla Valve House
WSIP Water System Improvement Program
WWTP Wastewater Treatment Plant
HCIP Quarterly Report Q4-FY2022-2023 (04/01/23 – 06/30/23) A8