CleanPowerSF Sfpuc Commission
June 11, 2024

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: June 4, 2024

TO: Commissioner Tim Paulson, President
Commissioner Anthony Rivera, Vice President
Commissioner Newsha K. Ajami
Commissioner Kate H. Stacy

FROM:

Dennis J. Herrera, General Manager

RE: Hetch Hetchy Capital Improvement Program Quarterly Report Quarterly Report (3 rd Quarter / FY 2023-2024)

Enclosed please find the Hetch Hetchy Capital Improvement Program (HCIP) Quarterly Report for the 3 rd Quarter (Q3) of Fiscal Year (FY) 2023-2024. 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 January 1, 2024 to March 31, 2024.

Attachment

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QUARTERLY REPORT
Hetch Hetchy Capital Improvement Program
January 2024 – March 2024
Published: June 4, 2024
DRAFT

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i
HCIP Quarterly Report Q3-FY2023-2024 (01/01/24– 03/31/24)

EXECUTIVE SUMMARY
This quarterly report provides a summary update on t he 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 January 1, 2024 to March 31, 2024.

This quarterly report includes all approved HCIP projects in the Hetch Hetchy Water Capital Improvement Program according to the 10-Year C apital Plan for FY2023-24 to FY2032-33, presented to and adopted by the Commission on February 14, 2023 (2023 HCIP). There are seventeen (17) projects in the 2023 HCIP together with three (3) project development (PD) accounts for program-level expenditures for each of the Water, Power, and Joint Programs.

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 follow s: ten (10) projects in planning, design, or bid & award; three (3) projects in construction; and four (4) projects that have subprojects in multiple phases including construction.

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 the Current Approved Budget and Current Forecast Cost of $1,032.55M and $1,534.62M, respectively. Reasons for the cost variances are included in Section 7 of this report.

Approved Budget for Projects in Each Phase

ii
HCIP Quarterly Report Q3-FY2023-2024 (01/01/24– 03/31/24) * Negative number is reflecting cost increases since last quarter, and positive number is reflecting cost reduction since last quarter.

Table B shows a variance of 30 months between the Approved and Forecast Completion Dates.

Reasons for individual project schedule variances are included in Section 7 of this report.

* “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:

 The Hetch Hetchy water system was shut down from December 5, 2023 to March 13, 2024 to facilitate construction for several HCIP capital projects including the Mountain Tunnel Improvement Project. All water supplied to the Regional Water System during this period was provided by Bay Area surface water treated at the Sunol Valley Water Treatment Plant and the Harry Tracy Water Treatment Plant, and by groundwater in San Francisco.  For the SJPL Valve and Safe Entry Improvements project, the Phase 1A contractor (contract HH-1005) completed significant construction work during the system outage. Some of the large valves did not pass factory acceptance tests and thus will be installed in the next planned system shutdown starting later this year. The Phase 1B contractor (contract HH-1006) completed all anticipated outage-related work as planned. For Phase 2A (contract HH-1012), the Commission awarded the contract and construction mobilization is anticipated to begin in the next quarter. The Phase 2B/2C 95% design continues. The contract for Phase 3 (HH-1009) received the “Notice to Proceed” in February.
 For Moccasin Powerhouse Bypass Upgrades project, a 35% design phase construction cost estimate was produced; the estimate is within the range of the current approved budget.

Table A. Program Cost Summary
Program

Expenditures
To Date
($ Million)
(A)
Current
Approved
Budget
($ Million)
(B)
Q3/FY23-24
Forecast
Costs
($ Million)
(C)

Cost
Variance
($ Million)
(D = B - C)
Cost Variance
Over
Reporting
Period *
($ Million)
(E)
Program Total $317.01 $1,032.55 $1,534.62 ($502.06) $1.90 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* 06/30/33 12/31/35 30 (Late)

iii
HCIP Quarterly Report Q3-FY2023-2024 (01/01/24– 03/31/24)  For Moccasin Powerhouse and Generator Step-Up (GSU) Rehabilitation, during this quarter, the contractor for Subproject B (contract DB-121R2) completed Generator M2 reassembly in March 2024. Dry and Wet commissioning is scheduled to start in April 2024 with partial utilization of Generator M2 by May 2024. The rehabilitation of major components of Generator M1 is meanwhile scheduled for Substantial Completion in April 2025. For Subproject C, the 35% design package is currently under review and approval by Hetch Hetchy Water and Power staff.  For the Transmission Lines 7/8 Upgrades project, the project achieved Substantial Completion on March 7, 2024. All work has been completed and final project documentation and approvals are in process.
 For the Moccasin Penstock Rehabilitation project, additional alternatives were developed by the team and the draft Alternatives Analysis Report was updated. The Independent Technical Review team continued to review and support the project.  For O’Shaughnessy Dam Outlet Works Phase 1, the contractor for Subproject A (contract DB- 135 for bulkheads rehabilitation) completed the design phase; bids for the construction trade packages are being pursued by the DB-135 contractor. For Subproject B (contract HH-1015 Drainage & Miscellaneous Dam Improvements), the drawings, specifications, and construction bid package for the improvements are being finalized for advertisement. For Subproject C (contract HH-1011 Instream Flow Release Valve Replacement), the pre-construction JOC contract work was completed. The main contract work made significant progress during the system outage including successful installation of two new knife gate isolation valves. For Subprojects D (Slide Gate) and E (Drum Gate), the needs assessment work continued.  For Cherry Dam Spillway - Short Term Improvements project, the project team continued work on a combined Alternatives Analysis-Conceptual Engineering Report based on a preferred alternative that provides flow capacity and erosion protection for flows up to 2,000 cubic feet per second for the upper spill channel.
 For the Mountain Tunnel Improvements Project (contract HH-1000), during the system shutdown (Outage No. 3 for this contract), significant construction progress was achieved. The long outage period of 90 days was divided into two phases of tunnel shutdown to allow an intermediate refill of the Priest Reservoir. The tunnel shutdown began on December 5, 2023 and ended on March 11, 2024 with an intermediate refill of Priest Reservoir from December 30 to January 4. At the end of the shutdown, about 72% of the tunnel lining repair work was complete and about 23% of the contact grouting was complete. Other work completed during this shutdown included backfilling and capping the old rock trap in the tunnel, pressure grouting the upstream and downstream bypass tunnel tie-in s, and other miscellaneous improvements.

Discussions took place on alternative delivery methods to complete the required improvements at the South Fork site.
 For the Bridge Replacement project, alternatives for interim repairs for the Eleanor Dam Bridge are being evaluated. The environmental permit requirements for the O’Shaughnessy Adit Access Bridge continued to be evaluated.
 For Moccasin Wastewater Treatment Plant Replacement (contract HH-1010), the Commission approved award of the construction contract in February 2024. The “Notice to Proceed” for construction is expected to be issued next quarter.

iv
HCIP Quarterly Report Q3-FY2023-2024 (01/01/24– 03/31/24)

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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

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HETCH HETCHY WATER AND POWER (HHWP)–

WATER DIVISION CAPITAL IMPROVEMENT PROGRAMS

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HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24)

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 Q3-FY2023-2024 (01/01/24 – 03/31/24)

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 repl ace 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 faciliti
es.
 Buildings – projects to provide safe and code compliant work spaces. 1 HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24)

2. PROGRAM STATUS
This Quarterly Report presents the progress made on HCIP between January 1, 2024 and March 31, 2024. This document serves as the third (3rd) Quarterly Report in Fiscal Year 2023-2024 (FY24) 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 FY2023-24 to FY2032-33 (FY24-33 CIP), presented to and adopted by the Commission on February 14, 2023, under Resolution No. 23-0037 (2023 HCIP).

There are seventeen (17) projects in the 2023 HCIP together with three (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 March 31, 2024 (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 2.2 shows the total number of projects in the following stages as of March 31, 2024: Pre- construction, Construction, and Post-construction.

Figure 2.1 Approved Budget for Projects in Each Phase
2 HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24) Figure 2.3 summarizes the environ
mental review status of the HCIP projects as of March 31, 2024.

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 Q3-FY2023-2024 (01/01/24 – 03/31/24)

3. PROGRAM COST SUMMARY
Table 3
provides an overall 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 Q2/FY23-24 and in Q3/FY23-24). The Current Approved Budget and Forecast Cost for the HCIP are $1,032.55 million and $1,534.62 million, respectively.

The overall 2023 HCIP negative Cost Variance of $502.06 million in Table 3 can be attributed to the following projects and PD accounts, and their variances provided below: all but one of these variances are included as revised budget requests that were submitted to the Commission in early 2024 as part of the FY25-34 10-Year CIP. The one new variance this quarter is a $1.90M cost savings on the Transmission Lines 7, 8 Upgrades project that completed work under its budget. The reasons for the project variances are reported in section 7:
 SJPL Valve and Safe Entry Improvement forecast cost increased by $17 .09M.

Water Infrastructure Project Development forecast cost increased by $4.15M.  Moccasin Powerhouse and GSU Rehabilitation continuation of $33.84M negative variance from Q4 of FY22/23.

Moccasin Powerhouse Bypass Upgrades continuation of $13.28M negative variance from Q4 of FY22/23 and an additional forecast increase of $0.38M for a total of $13.66M negative variance. 
Moccasin Switchyard Rehabilitation forecast cost increased by $9.97M 
Warnerville Substation Rehabilitation continuation of $1.89M negative cost variance from Q4 of FY22/23 and an additional foreca
st cost increase of $1.17M for a total of $3.16M negative variance.
 Transmission Lines 7/8 Upgrades forecast cost decreased by $2.54M. 
Power Infrastructure Project Development forecast cost increased by $2.28M. 
Moccasin Penstock Rehabilitation forecast cost increased by $283.92M. 
Moccasin Engineering and Records Building forecast cost increased by $28.01M. 
Early Intake Dam - Long Term forecast cost increased by $11.33M. 
Moccasin Dam & Reservoir Long-Term Improvements forecast cost increased by $69.01M. 
Cherry Dam Spillway - Short Term Improvements forecast cost decreased by $9.97M. 
O'Shaughnessy Dam Outlet Works Phase I forecast cost decreased by $4.25M. 
Mountain Tunnel Improvement Project forecast cost increased by $30.45M.  Moccasin Old Powerhouse Hazard Mitigation forecast cost decreased by $3.93M. 
Bridge Replacement (2 Bridges) forecast cost decreased by $24.18M. 
Canyon Tunnel - Hetchy Adit Rehabilitation forecast cost increased by $15.15M. 
Moccasin Wastewater Treatment Plant forecast cost increased by $3.35M. 
Joint Infrastructure Project Development forecast cost increased by $21.55. 4 HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24) Table 3. Cost Summary
Subprograms
Expenditures
To Date
($ Million)
(A)
Current
Approved
Budget
($ Million)
(B)
Q3/FY23-24
Forecast
Costs
($ Million)
(C)
Cost
Variance
($ Million)
(D = B - C)
Cost
Variance
Over
Reporting
Period *
($ Million)
(E )
Water Infrastructure $38.21 $149.42 $170.67 ($21.24) -
Water Conveyance (Water) $32.89 $140.66 $157.75 ($17.09) - Water Infrastructure Project
Development $5.32 $8.76 $12.91 ($4.15) -
Power Infrastructure $101.06 $191.65 $252.03 ($60.37) $1.90 Powerhouse $41.27 $94.11 $141.61 ($47.51) -
Switchyard & Substations
(Power) $23.60 $43.99 $57.12 ($13.13) -
Transmission Lines $31.91 $37.97 $35.43 $2.54 $1.90
Power Infrastructure Project
Development $4.27 $15.59 $17.87 ($2.28) -
Joint Infrastructure $177.74 $691.48 $1,111.92 ($420.44) - Water Conveyance (Joint) $7.83 $47.25 $331.17 ($283.92) - Building (Joint) $0.34 $60.72 $88.73 ($28.01) -
Dams & Reservoirs (Joint) $17.55 $234.76 $300.88 ($66.12) - Mountain Tunnel $135.05 $238.22 $268.67 ($30.45) -
Powerhouse (Joint) $0.69 $17.40 $13.47 $3.93 -
Roads & Bridges (Joint) $3.58 $29.37 $5.19 $24.18 -
Tunnels (Joint) $1.80 $14.99 $30.14 ($15.15) -
Utilities (Joint) $1.88 $12.03 $15.38 ($3.35) -
Joint Infrastructure Project
Development $9.02 $36.73 $58.29 ($21.55) -
Overall Program Total $317.01 $1,032.55 $1,534.62 ($502.06) $1.90 * Negative number is reflecting cost increases since last qua rter, and positive number is reflecting cost reduction sin
ce last quarter.

4. PROGRAM SCHEDULE SUMMARY
Figure 4 and Table 4 compare t
he FY24–33 CIP Approved Schedule and the Current Forecast Schedule for the HCIP. As shown in Table 4, the HCIP approved and forecast schedules are June 2033 and December 2035 respectively.
5 HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24) * “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 (Q3 FY23-24), the following major project milestones were achieved:
• Construction Notice-to-Proceed for SJPL Valve and Safe Entry Improvement (Phase 3) • 35% Design completed for O’Shaughnessy Dam Outlet Works Phase I (Subproject A) • Substantial completion for Transmission Lines 7/8 Upgrades • Award of construction for Moccasin Wastewater Treatment Plant Table 4. FY24-33 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 06/30/34 12 (Late) Power Infrastructure 05/29/12 05/29/12 A* 06/30/33 06/30/34 12 (Late) Joint Infrastructure 10/03/11 10/03/11 A* 06/30/33 12/31/35 30 (Late) Overall
HCIP Projects 10/03/11 10/03/11 A* 06/30/33 12/31/35 30 (Late) Figure 4. Program Schedule Summary
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 e f g h i j k l m n
Water Infrastructure
10035575 - SJPL Valve and Safe Entry Improvement
Phase 1A
Phase 1B
Phase 2A
Phase 2B/2C
Phase 3
Power Infrastructure
$27.4 12/01/27 $15.0 12/01/27 $40.7 12/01/27 TBD TBD TBD TBD TBD TBD $41.1 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 - Contingency Plan
Phase C - HH-1008
$9.7 11/30/28 $9.7 11/30/28 TBD TBD TBD TBD TBD TBD TBD TBD $19.7 01/31/30 $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 $35.4 01/31/25 Joint Infrastructure
$47.3 02/28/28 $13.2 12/31/24 TBD TBD TBD TBD TBD TBD TBD TBD $331.2 12/08/34 $60.7 06/30/31 $60.7 06/30/31 TBD TBD TBD TBD TBD TBD TBD TBD $88.7 05/31/29 Table 5. Budget and Schedule Trend Summary
$34.2 $34.2 $34.2 $37.4$24.3
09/24/21 06/28/22
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)
Q3 - FY23-24
04/25/2503/31/23 04/30/24 08/23/24
05/14/21
07/29/19 (Phase 1),
10/01/19 (Phase 2) &
12/29/23 (Phase 3)
09/09/20 (Phase 1),
05/11/22 (Phase 2) &
10/31/24 (Phase 3)
Q3 - FY23-24
FY24-33
$157.8 02/28/29$95.3 07/01/25 $98.9 03/13/28
Current StatusCER Awarded Construction
135% Design 95% Design
Q3 - FY23-24
03/13/28 $157.8 02/28/29$140.707/01/25
Project Initiation
07/01/19
07/14/21 (Phase 1A),
10/29/21 (Phase 1B),
06/08/23 (Phase 2A),
04/29/24 (Phase 2B/2C) &
03/31/23 (Phase 3)
03/08/22 (Phase 1A),
08/23/22 (Phase 1B),
02/27/24 (Phase 2A),
01/17/25 (Phase 2B/2C) &
01/09/24 (Phase 3)
$140.7 03/13/28 $95.3
Most Recent CIP
Approved Budget
Project Name
FY24-33 09/18/20
10036809 - Moccasin Powerhouse Bypass Upgrades
FY24-33 01/04/16
$66.7
04/13/21 (Phase 1),
05/11/21 (Phase 2) &
10/31/25 (Phase 3)
03/05/31 Q3 - FY23-24
Q3 - FY23-2403/19/2112/07/20
2 10035721 - Transmission Lines 7/8 Upgrades
FY24-33 12/02/19
$100.6 12/31/2812/03/2712/03/2712/31/28
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) &
05/02/24 (Phase C)
5/23/17 (Phase A),
N/A (Phase B) &
02/28/25 (Phase C)
Q3 - FY23-24
11/25/26
$66.7 $66.7 $100.6
10014088 - Moccasin Penstock Rehabilitation
FY24-33 02/01/16 09/03/26 03/05/27 03/02/29
FY24-33
09/01/15 (Phase A),
07/01/20 (Phase B) &
01/01/21 (Phase C)
$27.2$34.2 11/25/26
$66.712/03/27 $18.0 10/03/18
Q3 - FY23-24
Q3 - FY23-24
10039568 - Moccasin Switchyard Rehabilitation
FY24-33 11/01/22 05/31/25 11/30/25 09/30/26 06/30/27
10039680 - Moccasin Engineering and Records Building5
FY24-33 12/14/22 05/31/24 08/30/24 04/30/26 07/22/26
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 e f g h i j k l m n
Water Infrastructure
Table 5. Budget and Schedule Trend Summary (continued) Current StatusCER Awarded Construction135% Design 95% DesignProject Initiation Most Recent CIP Approved Budget
Project Name
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 $142.2 12/29/34 $24.9 11/01/27 $11.9 07/01/27 TBD TBD TBD TBD TBD TBD TBD TBD $14.9 06/30/27 $88.7 06/30/31 $88.7 06/30/31 TBD TBD TBD TBD TBD TBD TBD TBD $100.1 12/31/35 $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 $268.7 06/03/27 $17.4 06/30/28 $12.2 01/31/25 TBD TBD TBD TBD TBD TBD TBD TBD $13.5 07/01/30 10035086 - Bridge Replacement (2 Bridges)
Subproject 1
Subproject 2
$15.0 12/30/26 $0.5 06/30/16 $15.0 12/30/26 $8.0 06/30/18 TBD TBD TBD TBD $30.1 12/31/30 $12.0 04/07/26 $8.8 04/07/26 - - $8.8 04/07/26 $12.0 04/07/26 $15.4 02/20/28 $15.4 02/20/28 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 Upgrades project. CER was not required for the project.

3. This represents that Subproject A will be doing Progressive Design Build during Construction. Subproject B is in the process of finalizing the design. Subprojects D & E will not be doing CER.

4. This represents that the project started during the Design Phase.

5. This is a building project which follows a different set of milestones. Dates shown for CER, 35% Design, and 95% Design above are for Conceptual Design, Schematic Design, and Contract Document.

6. This represents the moving of design and construction scope for the bridge subprojects to projects 10014108 (Canyon Tunnel - Hetchy Adit Rehabilitation) and 10030759 (Eleanor Dam Rehabilitation).

7. Dates shown are for 50% Design and 100% Design.
10014115 - Cherry Dam Spillway - Short Term Improvements FY24-33 03/01/21 06/28/24 09/30/24 02/05/25 12/18/25 Q3 - FY23-24 10039119 - Early Intake Dam – Long Term
FY24-33 06/30/23 07/31/25 01/31/27 01/31/29 01/31/31 Q3 - FY23-24 10037351 - Moccasin Dam & Reservoir Long-Term
Improvements
FY24-33 05/03/21 06/28/24 12/31/25 12/30/27 12/04/29 Q3 - FY23-24 06/30/2612/31/24
- 04/29/22 03/23/23
02/03/14 03/17/23 03/30/16 09/19/24 02/16/27 Q3 - FY23-24 02/27/24
10014108 - Canyon Tunnel - Hetchy Adit Rehabilitation
10014114 - Mountain Tunnel Improvement Project
6/30/24 (Subproject 1) &
03/17/23 (Subproject 2)
10014110 - Moccasin Wastewater Treatment Plant4
FY24-33 01/03/22
FY24-33 02/27/20
Q3 - FY23-24
TBD
FY24-33
N/A (Subproject 1) &
N/A (Subproject 2)6
10037077 - Moccasin Old Powerhouse Hazard Mitigation
FY24-33 01/01/21 08/30/24 09/01/27 05/05/28 02/15/29 Q3 - FY23-24 N/A (Subproject 1) &
N/A (Subproject 2)6
N/A (Subproject 1) &
N/A (Subproject 2)6
TBD TBD$29.4 $29.4 12/30/27 TBD TBD
$43.709/16/25 09/16/25 09/16/25 09/16/25
Q3 - FY23-24
FY24-33 10/03/11 12/29/17 05/15/18 07/31/19 10/13/20 Q3 - FY23-24 $44.3 12/30/25 TBD $5.2 06/30/2412/30/27
Q3 - FY23-24
04/30/24 (Subproject A)7,
N/A (Subproject B) &
12/23/22 (Subproject C)
06/13/23 (Subproject A),
06/30/24 (Subproject B) &
06/13/23 (Subproject C)FY24-33 02/01/18
09/30/21 (Subproject A),
Complete (Subproject B),
09/30/22 (Subproject C),
N/A (Subproject D) &
N/A (Subproject E)
01/12/24 (Subproject A)7,
N/A (Subproject B) &
11/16/22 (Subproject C)
$48.0 $17.2 $47.909/17/25 $48.0 $48.0 $48.0
8 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24)

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
$140,662 $140,662 $157,752 $32,891 ($17,090) (12%) 03/13/28 03/13/28 02/28/29 (352) Power Infrastructure
Powerhouse
10036809
Moccasin
Powerhouse
Bypass
Upgrades
DS
$27,391 $27,391 $41,056 $1,739 ($13,665) (50%) 12/01/27 12/01/27 12/01/27 0 10014086
Moccasin
Powerhouse and
GSU
Rehabilitation
MP
$66,714 $66,714 $100,556 $39,531 ($33,842) (51%) 12/03/27 12/03/27 12/31/28 (394) Switchyard & Substations (Power)
* 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 FY24-33.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10- year CIP for FY24-33, 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 Q3-FY2023-2024 (01/01/24 - 03/31/24) 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)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
10014087
Warnerville
Substation
Rehabilitation
CN $34,248 $34,248 $37,407 $23,398 ($3,159) (9%) 11/25/26 11/25/26 11/25/26 0 10039568
Moccasin
Switchyard
Rehabilitation
PL
$9,739 $9,739 $19,708 $203 ($9,969) (102%) 11/30/28 11/30/28 01/31/30 (427) Transmission Lines
10035721
Transmission
Lines 7/8
Upgrades
CN $37,969 $37,969 $35,427 $31,914 $2,542 7% 01/31/25 01/31/25 01/31/25 0 Joint Infrastructure
Water Conveyance (Joint)
10014088
Moccasin
Penstock
Rehabilitation
PL
$47,251 $47,251 $331,172 $7,832 ($283,921) (601%) 02/28/28 02/28/28 12/08/34 (2,475) Buildings (Joint)
10039680
Moccasin
Engineering and
Records Building
PL
$60,725 $60,725 $88,734 $342 ($28,009) (46%) 06/30/31 06/30/31 05/31/29 760 * 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 FY24-33.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10- year CIP for FY24-33, 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 Q3-FY2023-2024 (01/01/24 - 03/31/24) 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)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
Dams & Reservoirs (Joint)
10032903
O'Shaughnessy
Dam Outlet
Works Phase I
MP $47,981 $47,981 $43,731 $12,332 $4,250 9%
09/17/25 09/17/25 06/30/26 (286)
10037351
Moccasin Dam &
Reservoir Long-
Term
Improvements
PL
$73,176 $73,176 $142,188 $3,097 ($69,012) (94%) 06/30/28 06/30/28 12/29/34 (2,373) 10014115
Cherry Dam
Spillway - Short
Term
Improvements
PL $24,856 $24,856 $14,886 $1,773 $9,970 40% 11/01/27 11/01/27 06/30/27 124 10039119 Early
Intake Dam -
Long Term
PL
$88,742 $88,742 $100,072 $345 ($11,330) (13%) 06/30/31 06/30/31 12/31/35 (1,645) Mountain Tunnel
10014114
Mountain Tunnel
Improvement
Project
CN
$238,219 $238,219 $268,669 $135,053 ($30,450) (13%) 06/03/27 06/03/27 06/03/27 0 Powerhouse (Joint)
* 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 FY24-33.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10- year CIP for FY24-33, 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 Q3-FY2023-2024 (01/01/24 - 03/31/24) 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)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
10037077
Moccasin Old
Powerhouse
Hazard
Mitigation
PL $17,401 $17,401 $13,475 $686 $3,926 23%
06/30/28 06/30/28 07/01/30 (731)
Roads & Bridges (Joint)
10035086 Bridge
Replacement (2
Bridges)
MP $29,371 $29,371 $5,194 $3,576 $24,177 82% 12/30/27 12/30/27 06/30/24 1,278 Tunnels (Joint)
10014108
Canyon Tunnel -
Hetchy Adit
Rehabilitation
DS
$14,993 $14,993 $30,138 $1,803 ($15,145) (101%) 12/30/26 12/30/26 12/31/30 (1,462) Utilities (Joint)
10014110
Moccasin
Wastewater
Treatment Plant
BA
$12,029 $12,029 $15,377 $1,878 ($3,348) (28%) 04/07/26 04/07/26 02/20/28 (684) * 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 FY24-33.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10- year CIP for FY24-33, 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. 12 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24)

7. PROJECT STATUS REPORT
10035575 - SJPL Valve and Safe Entry Improvement
Project Description: Allow
safe entry into all sections of SJPLs for inspection, maintenance, and capital improvements 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 Permit-Required Confined Space (PRCS) entry of a pipeline. In addition, replacement of the butterfly valves TUV 201 through 401 inside Tesla Valve Vault will be completed under this project.

Program: Water Infrastructure Project Status: Multi-Phases Environmental Status: Completed (Various)
Project Cost:

Approved
Forecast
Actual
$ 140.66 M
$ 157.75 M
$ 32.89 M
Project Schedule:

Approved
Forecast
07/01/19
07/01/19
03/13/28
02/28/29
Project Percent Complete: 23.2%
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 03/14/25
B 01/27/22 A 04/21/22 A 11/07/22 A 09/11/24
C 01/27/22 A 11/28/23 A 04/28/24 08/07/25
D 01/27/22 A 08/27/24 04/01/25 08/30/28
E 08/10/22 A 09/21/23 A 02/26/24 A 05/22/25
Progress and Status:

This project
is divided into five (5) 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 2A – Crossover
Valve Improvement pipelines 2&3 – HH-1012; (D) Phase
2B/2C – Crossover P4J Removable Spool Piece and Valve
Improvements - HH-1016; and (E) Phase 3 - Tesla Surge
Tower – HH-1009. For Phase 1A, the 36-inch diameter knife gate valves were installed at the crossover vaults. However, the 42-inch diameter knife gate valves failed to pass the factory acceptance tests and were not installed during the shutdown as planned. Completion of this work will require another full system outage next winter. For Phase 1B, the contractor successfully completed all outage-related work including installation of valves at Tesla Valvehouse and removable spool pieces. For Phase 2A, the Commission
approved the award of contract HH-1012 and issuance of
construction “Notice to Proceed” is expected next quarter. For Phases 2B & 2C, the thrust block design went through
independent technical review. The 95% design is on track to be completed next quarter. For Phase 3, HH-1009
construction contract received Notice to Proceed in February 2024.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. For Phase 1A (HH-1005) the quality control and performance of valves are currently a concern.

The contractor is working with the valve manufacturer to correct the problems. The project team is working with HHWP staff to minimize the impacts from an additional shutdown for HH-1006 Phase 1B IFJ Bolt and Insulator Check
valve installation.
13 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10036809 - Moccasin Powerhouse Bypass Upgrades
Project Description: 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.

Program: Power Infrastructure Project Status: Design Environmental Status: Active (Cat Ex) Project Cost:

Approved
Forecast
Actual
$ 27.39 M
$ 41.06 M
$ 1.74 M
Project Schedule:

Approved
Forecast
09/18/20
09/18/20
12/01/27
12/01/27
Project Percent Complete: 6.5%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 08/26/24 01/02/25 09/01/25 08/31/27
Progress and Status:

The draft
35% Design drawing package, draft Design Criteria
Report (DCR), and updated 35% Design Cost Estimate were submitted in March 2024. The 35% Design Cost Estimate
was close to both the cost estimate from the Conceptual Engineering Report and an independent third-party cost
estimate. The 65% Design drawing package and another
updated cost estimate are scheduled for July 2024.

Issues and Challenges:

The budget forecast has been updated to reflect the FY25-34 CIP. As reported previously, the increase in the construction cost estimate from the high-level estimate in the Alternative Analysis Report in 2020 to the Conceptual Engineering
Report completed in March 2023 can be attributed to more detailed scope and pipeline alignment, increase in raw
material costs, and an increase in construction labor cost.

MPH Bypass Overview Penstock and Powerhouse
14 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10014086 - Moccasin Powerhouse and GSU Rehabilitation
Project Description: The
project is broken down into three components: 1) Generator Rehabilitation – replace the entire generator and associated equipment, including new stator cores and coils, rotor poles, relays, and rotor rim; 2) GSU Replacement – replace two of the three existing generator step-up transformers (GSUs), new foundations and oil containment, and relay upgrades; and 3) Power Plant Systems Upgrades – replace the 480 V switchgear, 13.8 kV 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
$ 100.56 M
$ 39.53 M
Project Schedule:

Approved
Forecast
01/04/16
01/04/16
12/03/27
12/31/28
Project Percent Complete: 66.4%
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 06/26/23 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. For Subproject A, contract HH-1003R is currently in closeout. For Subproject B, contract DB-121R2 for the
Generator M2 rehabilitation, the contractor completed
Generator M2 reassembly in March 2024. Dry and Wet
commissioning is scheduled to start in April 2024 with partial utilization of Generator M2 by May 2024. The rehabilitation of major components of Generator M1 is meanwhile scheduled for Substantial Completion in April 2025. For Subproject C, the 35% design package has been reviewed. The 65%
design package is anticipated in June 2024.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The forecast project costs have increased for the following reasons: Subproject A: HH-1003R had a construction phase cost increase 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. Due to this schedule delay, DB-121R2’s construction management costs are expected to increase. Subproject C: Moccasin
Powerhouse Systems Upgrade project’s cost estimate at the end of conceptual engineering was higher than the previous estimate during the needs assessment phase. The overall Subproject C’s cost increased 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.

Turbine Guide Bearing Oil Pot Cooler
15 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10014087 - Warnerville Substation Rehabilitation
Project Description: 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.

Program: Power Infrastructure Project Status: Construction Environmental Status: Active (TBD) Project Cost:

Approved
Forecast
Actual
$ 34.25 M
$ 37.41 M
$ 23.40 M
Project Schedule:

Approved
Forecast
09/01/15
09/01/15
11/25/26
11/25/26
Project Percent Complete: 69.2%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast
A 03/31/16 A 01/10/17 A 11/26/18 A 12/31/24
B
C 06/28/24 08/30/24 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” JOC-94 (which would be issued only if needed), contingency contract would provide emergency temporary replacement of any breakers that fail until they can be permanently replaced.

For Subproject C Warnerville Substation Rehabilitation Phase 2, the design team will issue the 95% design package in the next quarter including an updated cost estimate. The 100% design package is scheduled to be completed in the next reporting quarter as well.

Issues and Challenges:

The budget forecast has been updated to reflect the FY25-34 CIP. 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.

Warnerville Substation Ph 2 South Yard PG&E Tie-in Upgrade

TBD TBD TBD TBD
16 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24)

10039568 - Moccasin Switchyard Rehabilitation
Project
Description: Replace 115 kV disconnect switches, replace 115 kV bus configuration, replace 230 kV disconnect switches, change 230 kV bus configuration, replace 115 kV circuit breakers, add surge arresters, perform a fault study, perform a grounding study, improve switchyard grading, and replace fencing .

Program: Power Infrastructure Project Status: Planning Environmental Status: Not Initiated (TBD)
Project Cost:

Approved
Forecast
Actual
$ 9.74 M
$ 19.71 M
$ 0.20 M
Project Schedule:

Approved
Forecast
11/01/22
11/01/22
11/30/28
01/31/30
Project Percent Complete: 3.3%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 11/30/26 04/01/27 08/01/27 07/31/29
Progress and Status:

The
scope of work for the planning phase is being developed.

The planning kick off is anticipated in May 2024.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The total project cost increased due to updated work plans and revised escalation cost. Also, the schedule change is due to a delay in setting up a professional services task order to perform the planning study due to shortage of staff from both the consultant and SFPUC.

Existing Moccasin Switchyard

17 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24)

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 115 kV conductors on Lines 7/8 from Warnerville to Standiford substations, resulting in increased capacity and resolving clearance detections. The project is primarily funded by renewable generation developers interconnecting to the California electrical grid who have an adverse impact on Lines 7/8. Remaining funding will come from capital funds previously allocated to 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
$ 35.43 M
$ 31.91 M
Project Schedule:

Approved
Forecast
12/02/19
12/02/19
01/31/25
01/31/25
Project Percent Complete: 91.0%
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
project achieved Substantial Completion on March 7,
2024. All work has been completed and final project
documentation and approvals are in process.

Issues and Challenges:

The budget forecast has been updated to reflect the FY25-34 CIP, which resulted in a positive variance of $641,803. In addition, the project is reporting an additional positive variance of $1,900,484 this quarter to reflect the forecasted unused Construction Contingency. The net positive variance is $2.54M. The change in budget is a result of the reduced forecast cost at completion for the project. No future change orders are anticipated at this time. All physical work has been completed.

Removal of Temporary Guard Structure at Oakdale Rd. / Tower 573S

18 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10014088 - Moccasin Penstock Rehabilitation
Project Description: The
project includes rehabilitation of anchor blocks, penstock coating, penstock saddles, air valves, large diameter butterfly valves, bifurcation sections, and flow meters; and upgrade of electrical system, power transformers, the standby generator in the West Portal Valve House, and the bulkhead isolation valves in the surge tower.

Program: Joint Infrastructure Project Status: Planning Environmental Status: Active (EIR) Project Cost:

Approved
Forecast
Actual
$ 47.25 M
$ 331.17 M
$ 7.83 M
Project Schedule:

Approved
Forecast
02/01/16
02/01/16
02/28/28
12/08/34
Project Percent Complete: 17.7%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 09/04/29 09/06/30 05/07/31 05/07/34
Progress and Status:

Several workshops
were held with SFPUC management
teams to review the alternatives development and the
evaluation process. The independent technical review team reviewed responses to the comments on the long-term
replacement alternatives. The second round of comments
were provided in this quarter. The revised draft Alternatives Analysis Report includes the discussion on the additional proposed alternatives.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. As reported previously, the budget and schedule forecasts have increased significantly due to the assumed scope change from rehabilitating the existing penstocks to the alternative for constructing a new drop shaft, a tunnel and above grade pipes. While a preferred alternative has not yet been selected, the cost estimate for this
alternative was used for cost forecasting.

Coating of Exposed Pipes upon Completion of Phased Array Ultrasonic Testing
19 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24)

10039680 - Moccasin Engineering and Records Building
Project
Description: Construct a 25,000 square-foot, two-story building in the area currently occupied by Engineering, Records, and Energy Services trailers.

Program: Joint Infrastructure Project Status: Planning Environmental Status: Not Initiated Project Cost:

Approved
Forecast
Actual
$ 60.72 M
$ 88.73 M
$ 0.34 M
Project Schedule:

Approved
Forecast
12/14/22
12/14/22
06/30/31
05/31/29
Project Percent Complete: 0.8%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 12/31/25 07/01/26 02/01/27 11/30/28
Progress and Status:

Conceptual
design is underway and scheduled to be
completed in June. The construction is still on schedule for completion in 2028.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The budget, schedule, and scope changes are a result of modifications to the scope, escalation in costs since the Alternative Analysis Report estimate, and an accelerated schedule.

Concept Design for Moccasin Engineering and Archive Building

20 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 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. Work under Phase 1 will include: (1) replacement of two existing instream flow release valves; (2) improvements to access and drainage in the dam gallery and stairs; (3) installation of new bulkheads for the outlet intake; and (4) a planning phase and scoping for the slide gates and drum gates improvements.

Program: Joint Infrastructure Project Status: Multi-Phases Environmental Status: Completed (Cat Ex)
Project Cost:

Approved
Forecast
Actual
$ 47.98 M
$ 43.73 M
$ 12.33 M
Project Schedule:

Approved
Forecast
02/01/18
02/01/18
09/17/25
06/30/26
Project Percent Complete: 31.8%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast
A 12/02/22 A 01/13/23 A 05/01/24 06/30/25
B 07/16/20 A 05/01/24 01/01/25 12/31/25
C
12/02/22 A 03/13/23 A 08/28/23 A 05/24/25
Progress and Status:

Subproject A (Bulkhead): The design phase under DB-135
was completed. Bids for the trade packages are being
pursued by the DB-135 contractor. Subproject B (Drainage & Miscelleous Dam Improvements): The drawings,
specifications, and construction bid package for the
improvements are being finalized. Subproject C (Instream Flow Release Valve Replacement): Construction under
HH-1011 contract is currently in progress. Installation of two new knife gate valves during the Canyon Tunnel outage was successfully completed. Subprojects D (Slide Gate) and E (Drum Gate): The engineering consultant continued work on the needs assessment.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. In addition, this quarter the
forecasted project completion was extended due to longer than expected duration to coordinate the proposed
construction water treatment and discharge requirements for the Drainage & Miscellaneous Improvement (Subproject B) contract. A decrease in the budget is a result from more favorable construction bid prices for the Instream Flow Release Valve Replacement Project and the New Bulkhead
System Project.

Installation of New 36-Inch Knife Gate Valve
21 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24)

10037351 - Moccasin Dam & Reservoir Long-Term Improvements Project
Description: A heavy storm event in 2018 caused significant damage to the auxiliary spillway, upstream trash rack and diversion, and downstream area. Subsequent engineering studies concluded that improvements are needed to increase the spillway capacity to safely pass the updated design flood without overtopping the existing embankment dam.

This project is needed for dam safety. This project will construct a new concrete spillway with adequate flow capacity along the alignment of the existing auxiliary spillway and additional flood protection to the Moccasin project facilities.

Program: Joint Infrastructure Project Status: Planning Environmental Status: Not Initiated (TBD)
Project Cost:

Approved
Forecast
Actual
$ 73.18 M
$ 142.19 M
$ 3.10 M
Project Schedule:

Approved
Forecast
05/03/21
05/03/21
06/30/28
12/29/34
Project Percent Complete: 4.2%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 06/29/29 07/02/29 03/30/30 12/31/33
Progress and Status:

The
project team continues to perform hydrological, hydraulic, geotechnical, and structural analysis to finalize the
conceptual engineering report. The scope of work is being developed for performing biological, cultural, wildlife, and terrestrial surveys for the project.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The higher forecasted cost and longer schedule duration are a result of findings from an updated engineering study of the conceptual layout that included significant additional scope for a higher spill crest elevation to provide additional operational and storage flexibility. The higher forecasted cost and extended schedule reflect a more accurate estimate of the project scope
requirements, site constraints, seasonal and operational limitations, more extensive environmental approval process, and additional escalation cost for the longer construction duration. However, preliminary results from the additional hydrological studies and geotechnical evaluations indicated potential to reduce scope and lower cost. This will be further evaluated in the near future.

Moccasin Dam and Service Spillway

22 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10014115 - Cherry Dam Spillway - Short Term Improvements Project Description: Cherry
Dam Spillway is a 334 foot-wide ogee-type concrete weir that discharges into an unlined adjacent channel. The spillway capacity is designed for 52,000 cfs. A spill of 1,500 cfs in 2010 resulted in significant erosion damage to the unlined spill channel, largescale erosion along the western segment of Cherry Dam, and flooding of Cherry Power Tunnel Adit and a campground downstream. Engineering studies showed that remedial measures and erosion protection for the spill channel are needed to ensure that spill flows from Cherry Valley Dam spillway can be contained without erosion damage to the existing embankment dam and downstream area. Studies also found that long-term improvement to the spillway is needed to increase the hydraulic capacity of the spillway to safely pass the design flood. This project is a short-term interim solution until the long-term spillway improvements are implemented. This project will re- establish containment for the breached spill channel section from the 2010 spill and will improve the flood protection for the dam and downstream area under a normal spill event.

Program: Joint Infrastructure Project Status: Planning Environmental Status: Active (MND) Project Cost:

Approved
Forecast
Actual
$ 24.86 M
$ 14.89 M
$ 1.77 M
Project Schedule:

Approved
Forecast
03/01/21
03/01/21
11/01/27
06/30/27
Project Percent Complete: 8.1%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 12/31/25 07/01/25 02/28/26 12/31/26
Progress and Status:

A combined Alternatives Analysis-Conceptual Engineering Report was completed based on a preferred alternative that provides flow capacity and erosion protection for flows up to 2,000 cubic feet per second for the upper spill channel.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. A decrease in the forecast cost is a result of reducing the flood protection improvement for the upper spill channel and eliminating improvements for the lower spill channel.

Cherry Valley Dam Spillway
23 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10039119 - Early Intake Dam - Long Term
Project Description: Replace
the existing deteriorated dam with a new concrete dam or diversion structure to provide deliveries from the Tuolumne River watershed, into Mountain Tunnel, for SFPUC customers during emergencies.

Program: Joint Infrastructure Project Status: Planning Environmental Status: Not Initiated (TBD)
Project Cost:

Approved
Forecast
Actual
$ 88.74 M
$ 100.07 M
$ 0.35 M
Project Schedule:

Approved
Forecast
06/30/23
06/30/23
06/30/31
12/31/35
Project Percent Complete: 1.2%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 06/28/30 07/01/30 04/01/31 12/31/34
Progress and Status:

The project
team continued work on the alternatives analysis
to evaluate the identified alternatives.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. Updated engineering study of
conceptual alternatives with more detailed evaluation found that more extensive scope and environmental permitting
efforts are needed to remove and replace the dam. The
increase in schedule and budget reflects higher construction and development costs due to challenges in site constraints, seasonal and operational restrictions, management of river flows during construction, environmental approvals,
compliance environmental requirements, and additional
escalation. The cost and schedule will be re-evaluated when the Alternative Analysis Report is complete.

Early Intake Dam and Spillway Aerial View
24 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10014114 - Mountain Tunnel Improvement Project
Project Description: Mountain Tunnel (MT)
was constructed between 1917 and 1925 and is a critical, nonredundant link in the Regional Water System, conveying SFPUC Tuolumne River water supply from Kirkwood Powerhouse to Priest Reservoir. Due to the tunnel's 90 years of operation, deferred maintenance, and construction deficiencies from the early 1900s, sections of the tunnel have deteriorated, some more extensively than others. The 2017 MT Inspection and Repairs Project provided an update to the Condition Assessment conducted in 2008. Short-term repairs were also made in 2017 and 2018 to reduce the risk of failures in the concrete lining prior to implementation of the long term project. The MT Improvements (Rehabilitation) Project was selected for design and construction of the preferred engineering alternative that will keep this vital component of the Regional Water System in reliable service for years to come. The budget and schedule are based on the MT Improvement Project construction phase, which is anticipated to take place between 2021 and 2027.

For the Mountain Tunnel Improvements Project, the Water portion will rehabilitate the inside of the tunnel and extend the siphon at South Fork, along with related safety improvements to the roadways that access the Mountain Tunnel. The Joint portion of the Mountain Tunnel Improvements consists of work related to the construction of the Flow Control Facility and Priest Adit Tunnel.

Program: Joint Infrastructure Project Status: Construction Environmental Status: Completed Project Cost:

Approved
Forecast
Actual
$ 238.22 M
$ 268.67 M
$ 135.05 M
Project Schedule:

Approved
Forecast
10/03/11
10/03/11
06/03/27
06/03/27
Project Percent Complete: 58.3%
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

During this quarter, which included contract-specific
Outage No. 3, significant construction progress was
achieved. The long outage period of 90 days was divided into two phases of shutdown to allow an intermediate refill of the Priest Reservoir. The tunnel shutdown began
on December 5 and ended on March 11 with a refill of
the Priest Reservoir from December 30 to January 4.

The tunnel lining repair, which included demolition of
unsound concrete lining and repairing the voids with
structural reinforcement and shotcrete, achieved a
completion of 43,660 linear feet or 72% of the
concrete lined tunnel length. Contact grouting, which
is applied behind the repaired tunnel lining, achieved a completion of 12,300 feet or 23% of the lined tunnel
length. Other work completed during this shutdown
included backfilling and capping the old rock trap in
the tunnel, completing pressure grouting of the
upstream and downstream terminus of the bypass tunnel
tie-ins (installed in Outage 2), completing skin
grouting of the large diameter water piping,
completing shotcreting on the wet side of the new
Priest bulkhead door and performing a video survey of
the Big Creek shaft to verify a potential grout line access point for Outage No. 4 (next winter). Discussions are taking place on alternative delivery methods to complete the
required improvements at South Fork.

Inside Mountain Tunnel showing Lining Repair and Contact Grouting Operation
Progress and Status:

Issues and Challenges:

The budget forecast has been updated to reflect
the FY25-34 CIP. The additional cost reflects the
additional funds that may be needed for South Fork,
CM Contract, and continued site security.
25 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10037077 - Moccasin Old Powerhouse Hazard Mitigation
Project Description: Design
and install mitigation measures to prevent the building from collapsing and to prevent hazardous materials (such as lead-based paint and asbestos) from contaminating Moccasin Reservoir.

Program: Joint Infrastructure Project Status: Planning Environmental Status: Not Initiated (TBD)
Project Cost:

Approved
Forecast
Actual
$ 17.40 M
$ 13.47 M
$ 0.69 M
Project Schedule:

Approved
Forecast
01/01/21
01/01/21
06/30/28
07/01/30
Project Percent Complete: 6.4%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 06/30/27 07/03/28 04/01/29 01/01/30
Progress and Status:

Alkali Silica
Resistivity (ASR) historical reports were
completed and incorporated into Draft Alternatives Analysis Report.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The budget, schedule, and scope changes are a result of the decreased construction costs associated with the preferred alternative, but also the increased schedule duration due to a longer environmental phase.

Existing Moccasin Old Powerhouse
26 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10035086 - Bridge Replacement (2 Bridges)
Project Description: This project
includes rehabilitation and/or replacement of O'Shaughnessy Adit Access Bridge and Lake Eleanor Dam Bridge.

Program: Joint Infrastructure Project Status: Multi-Phases Environmental Status: Not Applicable Project Cost:

Approved
Forecast
Actual
$ 29.37 M
$ 5.19 M
$ 3.58 M
Project Schedule:

Approved
Forecast
02/27/20
02/27/20
12/30/27
06/30/24
Project Percent Complete: 21.9%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast
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, alternatives for interim repairs to extend the service life of the bridge are being evaluated.

For the O’Shaughnessy Adit Access Bridge, the project team conducted several workshops on the material testing and load rating analysis of the bridge to confirm the load rating 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 budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The budget, schedule, and scope changes are a result of moving the bridge replacement
design and construction scopes to the respective Canyon Tunnel - Hetchy Adit Rehabilitation and Eleanor Dam
Rehabilitation projects.

Concrete Footings and Piers of the O'Shaughnessy Adit Access Bridge

N/A N/A N/A N/A
27 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24) 10014108 - Canyon Tunnel - Hetchy Adit Rehabilitation
Project Description: The project includes installation of a new reinforced concrete plug downstream of the existing plug.

Program: Joint Infrastructure Project Status: Design Environmental Status: Active (EIR) Project Cost:

Approved
Forecast
Actual
$ 14.99 M
$ 30.14 M
$ 1.80 M
Project Schedule:

Approved
Forecast
02/03/14
02/03/14
12/30/26
12/31/30
Project Percent Complete: 14.8%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 08/31/26 09/01/26 05/01/27 05/01/30
Progress and Status:

The project
team developed the 95% design package and a
consultant was hired to perform an independent technical review of the package. The proposed improvement is being assessed for potential environmental impacts, 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 (EIR).

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The budget, schedule, and scope changes are a result of moving the O'Shaughnessy Adit
Bridge scope from the Bridge Replacement Project to this project.

Canyon Tunnel - Hetchy Adit Bulkhead
28 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24)

10014110 - Moccasin Wastewater Treatment Plant
Project
Description: This project will 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: Bid and Award Environmental Status: Completed (Cat Ex)
Project Cost:

Approved
Forecast
Actual
$ 12.03 M
$ 15.38 M
$ 1.88 M
Project Schedule:

Approved
Forecast
01/03/22
01/03/22
04/07/26
02/20/28
Project Percent Complete: 19.8%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 02/22/23 A 10/12/23 A 06/15/24 08/19/27 Progress and Status:

Contract
HH-1010, Moccasin Wastewater Treatment Plant
Replacement, was awarded for construction by the SFPUC
Commission in February. Construction “Notice to Proceed” is expected to be issued next quarter.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. Additional scope items, including transformer upgrade, power pole replacement, and pump
station improvements, resulted in additional budget and schedule.

Existing Moccasin Wastewater Treatment Plant

29 HCIP Quarterly Report Q3-FY2023-2024 (01/01/24 - 03/31/24)

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 03/14/25 $15,042,045 $15,042,045 (182) $0 63.3% 10035575 - SJPL Valve & Safe Entry
Improvement - (Contract B, HH-1006)
11/07/22 09/11/24 09/11/24 $11,833,425 $11,833,425 0 $0 70.4% 10035575 - SJPL Valve & Safe Entry
Improvement - (Contract E, HH-1009)
02/26/24 05/22/25 05/22/25 $11,051,305 $11,051,305 0 $0 0.0% Power Infrastructure
10014086 - Moccasin Powerhouse
Generator Rehab - (Contract B,
DB-121R2)
08/15/22 06/17/25 06/17/25 $27,146,037 $27,146,037 0 $0 66.8% 10014087 - Warnerville Substation -
(DB-127R)
11/26/18 03/31/24 12/31/24 $14,591,450 $14,591,450 (275) $0 95.0% 10035721 - Transmission Lines 7/8
Upgrade - (HH-1007)
09/28/22 07/26/24 07/26/24 $24,197,640 $24,197,640 0 $0 99.6% Joint Infrastructure
10032903 - O'Shaughnessy Dam
Outlet Works Phase 1 - Instream Flow
Release (Contract C, HH-1011)
08/28/23 05/24/25 05/24/25 $6,556,000 $6,556,000 0 $0 4.8% 10014114 - Mountain Tunnel
Improvement - (HH-1000R)
01/29/21 12/03/26 12/03/26 $145,188,424 $147,708,424 0 ($2,520,000) 54.4% Approved Current Variance
Contract Cost Forecast Cost Cost Percent
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 Forecast Final Completion includes all approved, pending, and potential change orders, and trends.

Program Total for On-
Going Construction $255,606,325 $258,126,325 ($2,520,000) (1%) 30 HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24)

9. PROJECTS IN CLOSEOUT

There are no active projects currently in closeout phase.

10. COMPLETED PROJECTS

There are no completed projects.
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HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24) 32 Appendices

APPENDICES

A PROJECT DESCRIPTIONS

B AP PR

OVED PROJECT LEVEL SCHEDULES / BUDGETS
C L I

ST OF ACRONYMS
HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24) This page is intentionally left blank
HClP Quarterly Report Q3-FY2023-2024 (01/01/24 – 03/31/24) APPENDICES Q3-FY2023-2024 (01/01/24 – 03/31/24)
APPENDIX A. PROJECT DESCRIPTIONS

WATER INFRASTRUCTURE
Water Conveyance (Water)
10035575 SJPL Valve and Safe Entry Improvement
Allow safe entry into all sections of SJPLs for inspection, maintenance, and capital improvements 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 Permit-Required Confined Space (PRCS) entry of a pipeline. In addition, replacement of the butterfly valves TUV 201 through 401 inside Tesla Valve Vault will be completed under this project.

Water Infrastructure Project Development
10014072 WATER ONLY/PROJ DEV
The project provides programmatic support for Water funded capital projects. The following charges are 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 Hetch Hetchy staff performing program-level tasks, including capital plan development, budget management (including fund management and cost reallocations), and unifier and quarterly report generation tasks, where the costs should be distributed over all CIP Projects; 3) portal support for the existing SharePoint Portal (including document management and project dashboard reporting); 4) work outreach program; and 5) City Attorney charges for contract development.

A1
APPENDICES Q3-FY2023-2024 (01/01/24 – 03/31/24)
APPENDIX A. PROJECT DESCRIPTIONS

POWER INFRASTRUCTURE
Powerhouse
10036809 Moccasin Powerhouse Bypass Upgrades
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
The project is broken down into three components: 1) Generator Rehabilitation – replace the entire generator and associated equipment, including new stator cores and coils, rotor poles, relays, and rotor rim; 2) GSU Replacement – replace two of the three existing generator step-up transformers (GSUs), new foundations and oil containment, and relay upgrades; and 3) Power Plant Systems Upgrades – replace the 480 V switchgear, 13.8 kV switchgear, motor control centers, main control boards, protective relays, cooling water piping, and improving oil containment systems.

Switchyard & Substations (Power)
10014087 Warnerville Substation Rehabilitation
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. 10039568 Moccasin Switchyard Rehabilitation
Replace 115 kV disconnect switches, replace 115 kV bus configuration, replace 230 kV disconnect switches, change 230 kV bus configuration, replace 115 kV circuit breakers, add surge arresters, perform a fault study, perform a grounding study, improve switchyard grading, and replace fencing.

Transmission Lines
10035721 Transmission Lines 7/8 Upgrades
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 115 kV conductors on Lines 7/8 from Warnerville to Standiford substations, resulting in increased capacity and resolving clearance detections. The project is primarily funded by renewable generation developers interconnecting to the California electrical grid who have an adverse impact on Lines 7/8. Remaining funding will come from capital funds previously allocated to the Transmission Line Clearance Mitigation Project (10014089).

Power Infrastructure Project Development
10014092 POWER ONLY/PROJ DEVELP
The project provides programmatic support for Power funded capital projects. The following charges are 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 Hetch Hetchy staff performing program-level tasks, including capital plan development, budget management (including fund management and cost reallocations), and unifier and quarterly report generation tasks, where the costs should be distributed over all CIP Projects; 3) portal support for the existing SharePoint Portal (including document management and project dashboard reporting); 4) work outreach program; and 5) City Attorney charges for contract development.

A2
APPENDICES Q3-FY2023-2024 (01/01/24 – 03/31/24)
APPENDIX A. PROJECT DESCRIPTIONS

JOINT INFRASTRUCTURE
Water Conveyance (Joint)
10014088 Moccasin Penstock Rehabilitation
The project includes rehabilitation of anchor blocks, penstock coating, penstock saddles, air valves, large �diameter butterfly valves, bifurcation sections, and flow meters; and upgrade of electrical system, power transformers, the standby generator in the West Portal Valve House, and the bulkhead isolation valves in the surge tower.

Buildings (Joint)
10039680 Moccasin Engineering and Records Building
Construct a 25,000 square-foot, two-story building in the area currently occupied by Engineering, Records, and Energy Services trailers.

Dams & Reservoirs (Joint)
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. Work under Phase 1 will include: (1) replacement of two existing instream flow release valves; (2) improvements to access and drainage in the dam gallery and stairs; (3) installation of new bulkheads for the outlet intake; and (4) a planning phase and scoping for the slide gates and drum gates improvements.
10037351 Moccasin Dam & Reservoir Long-Term Improvements A heavy storm event in 2018 caused significant damage to the auxiliary spillway, upstream trash rack and diversion, and downstream area. Subsequent engineering studies concluded that improvements are needed to increase the spillway capacity to safely pass the updated design flood without overtopping the existing embankment dam. This project is needed for dam safety. This project will construct a new concrete spillway with adequate flow capacity along the alignment of the existing auxiliary spillway and additional flood protection to the Moccasin project facilities. 10014115 Cherry Dam Spillway - Short Term Improvements
Cherry Dam Spillway is a 334 foot-wide ogee-type concrete weir that discharges into an unlined adjacent channel. The spillway capacity is designed for 52,000 cfs. A spill of 1,500 cfs in 2010 resulted in significant erosion damage to the unlined spill channel, largescale erosion along the western segment of Cherry Dam, and flooding of Cherry Power Tunnel Adit and a campground downstream. Engineering studies showed that remedial measures and erosion protection for the spill channel are needed to ensure that spill flows from Cherry Valley Dam spillway can be contained without erosion damage to the existing embankment dam and downstream area. Studies also found that long-term improvement to the spillway is needed to increase the hydraulic capacity of the spillway to safely pass the design flood. This project is a short-term interim solution until the long-term spillway improvements are implemented. This project will re-establish containment for the breached spill channel section from the 2010 spill and will improve the flood A3
APPENDICES Q3-FY2023-2024 (01/01/24 – 03/31/24)
protection for the dam and downstream area under a normal spill event. 10039119 Early Intake Dam - Long Term
Replace the existing deteriorated dam with a new concrete dam or diversion structure to provide deliveries from the Tuolumne River watershed, into Mountain Tunnel, for SFPUC customers during emergencies.

Mountain Tunnel
10014114 Mountain Tunnel Improvement Project
Mountain Tunnel (MT) was constructed between 1917 and 1925 and is a critical, nonredundant link in the Regional Water System, conveying SFPUC Tuolumne River water supply from Kirkwood Powerhouse to Priest Reservoir. Due to the tunnel's 90 years of operation, deferred maintenance, and construction deficiencies from the early 1900s, sections of the tunnel have deteriorated, some more extensively than others. The 2017 MT Inspection and Repairs Project provided an update to the Condition Assessment conducted in 2008. Short-term repairs were also made in 2017 and 2018 to reduce the risk of failures in the concrete lining prior to implementation of the long term project. The MT Improvements (Rehabilitation) Project was selected for design and construction of the preferred engineering alternative that will keep this vital component of the Regional Water System in reliable service for years to come. The budget and schedule are based on the MT Improvement Project construction phase, which is anticipated to take place between 2021 and 2027. For the Mountain Tunnel Improvements Project, the Water portion will rehabilitate the inside of the tunnel and extend the siphon at South Fork, along with related safety improvements to the roadways that access the Mountain Tunnel. The Joint portion of the Mountain Tunnel Improvements consists of work related to the construction of the Flow Control Facility and Priest Adit Tunnel.

Powerhouse (Joint)
10037077 Moccasin Old Powerhouse Hazard Mitigation
Design and install mitigation measures to prevent the building from collapsing and to prevent hazardous materials (such as lead-based paint and asbestos) from contaminating Moccasin Reservoir.

Roads & Bridges (Joint)
10035086 Bridge Replacement (2 Bridges)
This project includes rehabilitation and/or replacement of O'Shaughnessy Adit Access Bridge and Lake Eleanor Dam Bridge.

Tunnels (Joint)
10014108 Canyon Tunnel - Hetchy Adit Rehabilitation
The project includes installation of a new reinforced concrete plug downstream of the existing plug.

Utilities (Joint)
10014110 Moccasin Wastewater Treatment Plant
This project will 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
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APPENDICES Q3-FY2023-2024 (01/01/24 – 03/31/24)
10014116 JOINT - PROJECT DEVELOPMENT
The following charges are allocated to the joint funded 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 HHWP staff performing program-level tasks, including capital plan development, budget management (including fund management, and cost reallocations), and unifier and quarterly report generation tasks, where the costs should be distributed over all CIP projects; 3) portal support for the existing SharePoint portal (including document management and project dashboard reporting); 4) work outreach program; and 5) City Attorney contract development charges.

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Project Name BL Project Total Cost Start Finish
Hetchy Capital Improvement Program $1,032,554,797.46 03-Oct-11 A 30-Jun-33 Hetch Hetchy W ater Enterpise $1,032,554,797.46 03-Oct-11 A 30-Jun-33 Water Infrastructure $149,423,107.00 26-Mar-12 A 30-Jun-33 Water Conveyance (Water) $140,661,975.00 01-Jul-19 A 13-Mar-28 SJPL Valve and Safe Entry Improvement $140,661,975.00 01-Jul-19 A 13-Mar-28 Water Infrastructure Project Development $8,761,132.00 26-Mar-12 A 30-Jun-33 WATER ONLY/PROJ DEV (CUH100PD) $8,761,132.00 26-Mar-12 A 30-Jun-33 Power Infrastructure $191,653,862.00 29-May-12 A 30-Jun-33 Powerhouse $94,105,061.00 04-Jan-16 A 03-Dec-27
Moccasin Powerhouse and GSU Rehabilitation (CUH10114) $66,713,635.00 04-Jan-16 A 03-Dec-27 Moccasin PH Bypass Upgrades $27,391,426.00 18-Sep-20 A 01-Dec-27 Switchyard & Substations (Power) $43,987,428.00 01-Sep-15 A 30-Nov-28 Warnerville Substation Rehabilitation (CUH10115) $34,248,428.00 01-Sep-15 A 25-Nov-26 Moccasin Switchyard Rehabilitation $9,739,000.00 01-Nov-22 A 30-Nov-28 Transmission Lines $37,969,000.00 02-Dec-19 A 31-Jan-25 Transmission Lines 7/8 Upgrades $37,969,000.00 02-Dec-19 A 31-Jan-25 Power Infrastructure Project Development $15,592,373.00 29-May-12 A 30-Jun-33 POWER ONLY/PROJ DEVELP (CUH101PD) $15,592,373.00 29-May-12 A 30-Jun-33 Joint Infrastructure $691,477,828.45 03-Oct-11 A 30-Jun-33 Water Conveyance (Joint) $47,251,363.00 01-Feb-16 A 28-Feb-28 Moccasin Penstock (CUH10116) $47,251,363.00 01-Feb-16 A 28-Feb-28 Buildings (Join) $60,724,795.45 14-Dec-22 A 30-Jun-31
Moccasin Engineering and Records Building $60,724,795.45 14-Dec-22 A 30-Jun-31 Dams & Reservoirs (Joint) $234,755,539.99 01-Feb-18 A 30-Jun-31 Cherry Spillway (CUH10222) $24,855,937.99 01-Mar-21 A 01-Nov-27 O'Shaughnessy Dam Outlet Works Phase (10032903) $47,981,371.00 01-Feb-18 A 17-Sep-25 Moccasin Dam Long-Term Improvements $73,176,231.00 03-May-21 A 30-Jun-28 Early Intake Dam - Long Term $88,742,000.00 30-Jun-23 A 30-Jun-31 Mountain Tunnel $238,218,951.00 03-Oct-11 A 03-Jun-27
Mountain Tunnel Improvement Project (CUH10221) $238,218,951.00 03-Oct-11 A 03-Jun-27 Powerhouse (Joint) $17,401,000.00 01-Jan-21 A 30-Jun-28 Moccasin Old Powerhouse Hazard Mitigation (10037077) $17,401,000.00 01-Jan-21 A 30-Jun-28 Road and Bridges (Joint) $29,370,881.00 27-Feb-20 A 30-Dec-27 Bridge Replacement $29,370,881.00 27-Feb-20 A 30-Dec-27 Tunnels (Joint) $14,993,143.00 03-Feb-14 A 30-Dec-26
Canyon Tunnel Rehabilitation (CUH10215) $14,993,143.00 03-Feb-14 A 30-Dec-26 Utilities (Joint) $12,028,751.00 03-Jan-22 A 07-Apr-26
Moccasin Wastewater Treatment Plant (CUH10217) $12,028,751.00 03-Jan-22 A 07-Apr-26 Joint Infrastructure Project Development $36,733,404.00 25-Jun-12 A 30-Jun-33 Joint Project Development (CUH102-PD) $36,733,404.00 25-Jun-12 A 30-Jun-33

F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F FY2023 FY2024 FY2025 FY2026 FY2027 FY2028 FY2029 FY2030 FY2031 FY2032 FY2033 APPENDIX B. Hetch Hetchy Capital Improvement Program Approved Project Level Schedules/Budgets Planning
Environmental
Design
Right-of-Way
Bid & Award
Construction Mgmt
Construction
Closeout
Program Mgmt
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Appendices Q3-FY2023-2024 (01/01/24 – 03/31/24)
APPENDIX C. LIST OF ACRONYMS
AAR Alternative Analysis Report
CD Contract Document
CD Conceptual Design
CEQA California Environmental Quality Act
CER Conceptual Engineering Report
CIP Capital Improvement Program
CM/GC Construction Manager/General
Contractor
DB Design, Build
DCR Design Criteria Report
EMB Engineering Management Bureau
EIR Environmental Impact Report
FY Fiscal Y
ear
GSU Generator Step-Up
GWH Gigawatt Hours
HCIP Hetch Hetchy Capital Improvement
HH
Program
Hetch Hetchy
HHWP Hetch Hetchy Water and Power
IFR Instream Flow Release
JOC Job Order Contract
MID Modesto Irrigation District
MPH Moccasin Powerhouse
NAR Needs Assessment Report
NHC Northwest Hydraulic Consultants
NTP Notice to Proceed
MT Mountain Tunnel
OSH O’Shaughnessy Dam
PD Project Development
PRCS Permit Required Confined Space
R&R Renewal and Replacement
RSP Removable Spool Piece
SBR Sequence Batch Reactor
SCADA Supervisory Control and Data
Acquisition
SD Schematic Design
SFPUC San Francisco Public Utilities
SJPL
TUV
WSIP
Commission
San Joaquin Pipeline
Tesla Ultra Violet
Water System Improvement Program
WWTP Wastewater Treatment Plant
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HClP Quarterly Report
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Q3-FY2023-2024 (01/01/24 – 03/31/24)