CleanPowerSF Sfpuc Commission
March 26, 2024

1 Hetch Hetchy Capital Improvement Program
Q2 | FY 2023
–
2024
April 9, 2024
Katie Miller, Director
Water Capital Programs
Infrastructure Division
Planning (7),
$322M
Design (2),
$42M
Bid & Award (1), $12M
Construction (3),
$310M
Closeout (0), $0
Completed
(0), $0
Multiple Phase
(4), $285M
Not Initiated (0),
$0
$971M
(17 Projects)
* Excluded 3 Project
Development Accounts ($61M)
Project Count by Phase*
HCIP Program Status (as of December 2023)
Expenditures
$290M $743M
Expenditures
Expended Remaining
Highlights:
• $25.8M spent during Q2
• 2 Contracts Advertised for Bid
HCIP Program Cost Summary
(from Table 3)
3 Program Name
Expenditures
to Date
($Million)
Expenditures
During Q2
($Million)
Current
Approved
Budget
($Million)
Current
Forecasted
Cost
($Million)
Cost
Variance
($Million)
Cost
Variance
in Q2
($Million)
Water
Infrastructure $28 $3 $149 $171 $22 $22
Power
Infrastructure $96 $12 $192 $254 $62 $13
Joint
Infrastructure $166 $11 $692 $1,112 $420 $420
Overall HCIP $290 $26 $1033 $1,537 $504 $455
HCIP Budget and Schedule Variances
4 • Projects’ scope, schedule, budget forecasts updated to match proposed FY2025-2034 10-Year CIP
• 14/17 projects forecasting schedule variance
• 11 schedule increases between 3 months to 7 years
o Major and minor scope changes, procurement challenges, resources • 3 schedule decreases – efficiencies and scope reductions • 17/17 projects forecasting cost variance
• 12 cost increases ($3M to $284M)
o Major and minor scope changes, escalation, labor and material costs • 5 cost decreases ($1M to $24M) – rescoping, efficiencies • Hetch Hetchy Water 10-Year CIP includes changes
San Joaquin Pipelines (SJPL) Valve and
Safe Entry Improvement
5 Progress and Status:

Phase 1A & 1B Contracts (Tesla and
Oakdale Entry Improvements):
• Procurement and site excavation.
• Pipeline construction began Dec 5th.

Phase 2 (Pelican, Roselle, Emery):
• Contract 2A: Advertised in November.
• Contract 2B: 95% design achieved.

Phase 3 (Tesla Surge Tower):
• Bid opening in November.
• Budget increase for escalation and
surge tower enhancements.

Approved Budget: $140.7M (Forecast +$17.1M)
Approved Completion: March 2028 (Forecast +352 days)
Current Phase: Multiple Phases
Expended to Date: $22.6M
SJPL Valve and Removable Spool Piece installation
Moccasin Powerhouse and Generator
Step-Up Transformer Rehabilitation
6 Progress and Status:

A) Step-Up Transformers:
• Close-out approved in November.

B) Generators Rewind:
• Contractor completed Generator
M2 disassembly, began
rehabilitation.
• Generator M2 rehabilitation
anticipate completion by April
2024.

C) Powerhouse Systems Upgrade:
• Draft 35% design complete.

Approved Budget: $66.7M (Forecast +$33.9M)
Approved Completion: Dec 2027 (Forecast +394 days)
Current Phase: Multiple Phases
Expended to Date: $36.9M
Installing Rotor Rim to Generator M2 Shaft
O’Shaughnessy Dam Outlet Works
Phase 1
7 Progress and Status:

A) Bulkheads:
• Progressive Design-Build contract in
design.
• Underwater investigation in December.

B) Drainage: Finalizing bid package.

C) Instream Flow Release Valves:
• Contractor mobilized.
• Valves procured and prepared for
installation during shutdown.

D) Slide Gates & E) Drum Gates:
• Needs Assessment continued.

Approved Budget: $47.9M (Forecast -$4.3M)
Approved Completion: Sept 2025 (Forecast +105 days)
Current Phase: Multiple
Expended to Date: $8.7M
New 36-inch Gate Valves in OSH Diversion Tunnel
Mountain Tunnel Improvements
8 Progress and Status:
• Significant work at Priest Reservoir
• Completed Flow Control Facility
Shaft final lining.
• Installed waterproofing membrane in
New Priest Adit.
• Grout Plant set up at Priest Portal for
in-tunnel lining repair work.
• Shutdown No. 3 initiated December
5 for 100 days.
• Began concrete lining repair on
Mountain Tunnel.

Approved Budget: $238.2M (Forecast +$30.5M)
Approved Completion: June 2027 (Forecast +0 days)
Current Phase: Construction
Expended to Date: $128.6M
Lining and Grout Repairs inside Mountain Tunnel
Mountain Tunnel Improvements
9 Mountain Tunnel - Shutdown No. 3 (Dec 5, 2023 to Mar 8, 2024) Tunnel Lining and Grout Repair Completed
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: March 18, 2024
TO: Commissioner Tim Paulson, President
Commissioner Anthony Rivera, Vice President

Commissioner Newsha K. Ajami
Commissioner Sophie Maxwell
Commissioner Kate H. Stacy
FROM: Dennis J. Herrera, General Manager
RE: Hetch Hetchy Capital Improvement Program Quarterly Report Quarterly Report (2nd Quarter / FY 2023-2024)
Enclosed please find the Hetch Hetchy Capital Improvement Program (HCIP) Quarterly Report for the 2 nd Quarter (Q2) 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 October 1, 2023 to December 31, 2023.

Attachment

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QUARTERLY REPORT
Hetch Hetchy Capital Improvement Program
October 2023 – December 2023
Published: March 18, 2024
DRAFT

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i
HCIP Quarterly Report Q2-FY2023-2024 (10/01/23– 12/31/23)

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 October 1, 2023 to December 31, 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 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.

Approved Budget for Projects in Each Phase

ii
HCIP Quarterly Report Q2-FY2023-2024 (10/01/23– 12/31/23) For this Quarterly Report, the projects’ schedule and cost forecasts were updated to match the proposed schedules and costs included in FY25-FY34 10-year Capital Improvement Plan that was presented to and approved by the San Francisco Public Utilities Commission on February 13, 2024.

Changes to the approved program and project scopes, schedules, and budgets that were proposed as part of this FY25-FY34 10-year CIP will become effective at the start of FY25, on July 1, 2024.

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 $1,536.52M, respectively. Reasons for the cost variances are included in Section 7 of this report.

* 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 and the new forecasted completion date is 12/31/35. 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.

Table A. Program Cost Summary
Program

Expenditures
To Date
($ Million)
(A)
Current
Approved
Budget
($ Million)
(B)
Q2/FY23-24
Forecast
Costs
($ Million)
(C)

Cost
Variance
($ Million)
(D = B - C)
Cost Variance
Over
Reporting
Period *
($ Million)
(E)
Program Total $289.84 $1,032.55 $1,536.52 ($503.96) ($454.95) 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

iii
HCIP Quarterly Report Q2-FY2023-2024 (10/01/23– 12/31/23) Program Key Updates:

The key updates for the HCIP include:

 For the SJPL Valve and Safe Entry Improvements project, the contractors of subprojects A (Phase 1A contract HH-1005) and B (Phase 1B contract HH-1006) prepared the construction sites for the system outage that started in December and worked on procuring the valves for installation during the shutdown. The construction contract for Subproject C (Phase 2A contract HH-1012) was advertised in November. For Subproject D (Phases 2B/2C contract HH-1016), the 95% design is anticipated in April 2024. The construction contract for Subproject E (Phase 3 contract HH-1009) had a successful bid opening in November.  For the Moccasin Powerhouse and Generator Step-Up (GSU) Rehabilitation, the Commission approved contract close-out for Subproject A contract HH-1003R in November. For Subproject B contract DB-121R2 for the Generator M2 rehabilitation, the contractor completed Generator M2 disassembly in December 2023 and anticipates complete rehabilitation and partial utilization of Generator M2 by April 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 HHWP.  For Transmission Lines 7/8 Upgrades project (contract HH-1007), the contractor started conductor installation during the planned outage from October 1st and finished on December 15th. All wire installation was completed successfully. Hetch Hetchy Operations will energize the lines following coordination with other utility agencies.  For the Moccasin Penstock Rehabilitation, several site visits and workshops were held to review the proposed alternatives and recommendation for a full replacement project instead of rehabilitating the existing penstocks. The independent technical review team visited the site in October and provided comments on the long-term replacement alternatives, pros and cons associated with each alternative, and potential challenges during construction. In November the project team conducted preliminary geologic reconnaissance, site evaluation for the proposed alternatives, and potential constructability challenges.  For O’Shaughnessy Dam Outlet Works Phase 1, Subproject A (Bulkhead): The design phase under contract DB-135 for the new bulkhead system is in-progress and an underwater conditions investigation was performed. Subproject B (Drainage & Miscellaneous Dam Improvements): The construction package was being finalized for advertisement next quarter.

Subproject C (Instream Flow Release Valve Replacement): Construction under Contract JOC- 87-06 for modification of the tunnel access building was completed. Contractor for contract HH- 1011 for construction of the instream flow release valve replacement began mobilization and site preparation.
 For Moccasin Dam & Reservoir Long-Term Improvements project, the budget and schedule forecasts were updated to reflect the higher forecasted cost and longer schedule duration required to construct a higher dam spill crest elevation that was deemed necessary to provide additional operational and storage flexibility. The forecast increases also reflect a more accurate estimate of the project scope requirements, site constraints, seasonal and operational

iv
HCIP Quarterly Report Q2-FY2023-2024 (10/01/23– 12/31/23) limitations, more extensive environmental approv al process, and additional escalation cost for the longer construction duration.
 For Cherry Dam Spillway - Short Term Improvements project, the scope and design criteria were modified resulting in decreased cost and schedule forecasts. The modified scope includes rehabilitating the damaged spill channel section and armoring the upper spill channel for protection against erosion from spillway discharges of up to 2,000 cubic feet per second.  For the Mountain Tunnel Improvements Project, significant work was accomplished at the Priest Reservoir site including completion of the Flow Control Facility Shaft final lining; installation of the waterproofing membrane in the New Priest Adit; construction on the large cut walls on Adit Roads 5/6 and 8/9; and construction of a large grout plant at Priest in preparation for tunnel lining repair work during Outage No. 3, which began on December 05. During the outage, In-Tunnel repair work of the concrete lining was started.  For the Bridge Replacement project, it was decided to move the scope, schedule and budget for the Lake Eleanor Dam Bridge rehabilitation to the Eleanor Dam Rehabilitation project, and the scope, schedule and budget for the O’Shaughnessy Adit Access Bridge rehabilitation to the Canyon Tunnel - Hetchy Adit Rehabilitation project, since the corresponding projects share the same location and environmental permitting requirements.  For Moccasin Wastewater Treatment Plant project, the construction contract HH-1010 was advertised in October and bids were received in November. It is anticipated that the Commission will be requested to approve award of the Construction contract in the next quarter.

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 Q2-FY2023-2024 (10/01/23 – 12/31/23)

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 Q2-FY2023-2024 (10/01/23 – 12/31/23)

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 Q2-FY2023-2024 (10/01/23 – 12/31/23)

2. PROGRAM STATUS
This Quarterly Report presents the progress made on HCIP between October 1, 2023 and December 31, 2023. This document serves as the second (2nd) 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 December 31, 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 2.2 shows the total number of projects in t he following stages as of December 31, 2023: Pre- construction, Construction, and Post-construction.

Figure 2.1 Approved Budget for Projects in Each Phase
2 HClP Quarterly Report Q2-FY2023-2024 (10/01/23 – 12/31/23) Figure 2.3 summarizes the environmental review status of the HCIP projects as of December 31, 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 Q2-FY2023-2024 (10/01/23 – 12/31/23)

3. PROGRAM COST SUMMARY
Table 3 provides an o
verall 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 Q1/FY23-24 and in Q2/FY23-24). The Current Approved Budget and Forecast Cost for the HCIP are $1,032.55 million and $1,536.52 million, respectively.

During this Quarterly Report, the projects’ schedule and cost forecasts were updated to match the proposed schedules and costs included in FY25-FY34 10-year Capital Improvement Plan that was presented to and approved by the San Francisco Public Utilities Commission on February 13, 2024.

The overall 2023 HCIP negative Cost Variance of $503.96 in Table 3 can be attributed to the following projects and PD accounts, and their variances provided below: 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 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 forecast cost increase of $1.17M for a total of $3.16M negative variance.
 Transmission Lines 7/8 Upgrades forecast cost decreased by $0.64M.  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 Q2-FY2023-2024 (10/01/23 – 12/31/23) Table 3. Cost Summary
Subprograms

Expenditures
To Date
($ Million)
(A)
Current
Approved
Budget
($ Million)
(B)
Q2/FY23-24
Forecast
Costs
($ Million)
(C)

Cost
Variance
($ Million)
(D = B - C)
Cost
Variance
Over
Reporting
Period *
($ Million)
(E )
Water Infrastructure $27.76 $149.42 $170.67 ($21.24) ($21.24) Water Conveyance (Water) $22.62 $140.66 $157.75 ($17.09) ($17.09) Water Infrastructure Project
Development $5.14 $8.76 $12.91 ($4.15) ($4.15)
Power Infrastructure $96.45 $191.65 $253.93 ($62.27) ($13.26) Powerhouse $38.39 $94.11 $141.61 ($47.51) ($0.38)
Switchyard & Substations
(Power) $23.26 $43.99 $57.12 ($13.13) ($11.24)
Transmission Lines $30.75 $37.97 $37.33 $0.64 $0.64
Power Infrastructure Project
Development $4.05 $15.59 $17.87 ($2.28) ($2.28)
Joint Infrastructure $165.63 $691.48 $1,111.92 ($420.44) ($420.44) Water Conveyance (Joint) $7.41 $47.25 $331.17 ($283.92) ($283.92) Building (Joint) $0.26 $60.72 $88.73 ($28.01) ($28.01)
Dams & Reservoirs (Joint) $13.46 $234.76 $300.88 ($66.12) ($66.89) Mountain Tunnel $128.59 $238.22 $268.67 ($30.45) ($30.45) Powerhouse (Joint) $0.68 $17.40 $13.47 $3.93 $3.93
Roads & Bridges (Joint) $3.30 $29.37 $5.19 $24.18 $24.18 Tunnels (Joint) $1.61 $14.99 $30.14 ($15.15) ($15.15)
Utilities (Joint) $1.80 $12.03 $15.38 ($3.35) ($3.35)
Joint Infrastructure Project
Development $8.52 $36.73 $58.29 ($21.55) ($21.55)
Overall Program Total $289.84 $1,032.55 $1,536.52 ($503.96) ($454.95) * Negative number is reflecting cost increases since last quarter, and positive number is reflecting cost reduction since last quarter.

4. PROGRAM SCHEDULE SUMMARY
Figure 4 and Table 4 compare the 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 Q2-FY2023-2024 (10/01/23 – 12/31/23)

* “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 (Q2 FY23-24), the following major project milestones were achieved:

 Bid Advertisement for SJPL Valve and Safe Entry Improvement (Phase 2A)  Bid Advertisement 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 Power Infrastructure 05/29/12 05/29/12 A* 06/30/33 06/30/34 12 Joint Infrastructure 10/03/11 10/03/11 A* 06/30/33 12/31/35 30 Overall
HCIP Projects 10/03/11 10/03/11 A* 06/30/33 12/31/35 30 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 02/28/28 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 $37.3 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 10036809 - Moccasin Powerhouse Bypass Upgrades
FY24-33 09/18/20 03/31/23 04/30/24 11/27/24 06/30/25 Q2 - FY23-24 10039568 - Moccasin Switchyard Rehabilitation
FY24-33 11/01/22 12/22/24 11/30/25 09/30/26 08/01/27 Q2 - FY23-24 Q2 - FY23-24
10039680 - Moccasin Engineering and Records Building
5 FY24-33 12/14/22 05/31/24 08/30/24 04/30/26 07/22/26
Q2 - FY23-24
11/25/26
$66.7 $66.7 $66.7
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
Project Name
FY24-33 01/04/16
$66.7
06/07/21 (Phase 1),
08/15/22 (Phase 2) &
01/01/26 (Phase 3)
03/07/31 Q2 - FY23-24
Q2 - FY23-2403/19/2112/07/202
10035721 - Transmission Lines 7/8 Upgrades
FY24-33 12/02/19
$100.6 12/31/2812/03/2712/03/2712/03/27
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)
10/04/17 (Phase A),
N/A (Phase B) &
02/28/25 (Phase C)
07/01/25
Project Initiation
07/01/19
07/14/21 (Phase 1A),
10/29/21 (Phase 1B),
06/08/23 (Phase 2A),
04/19/24 (Phase 2B/2C) &
03/31/23 (Phase 3)
05/16/22 (Phase 1A),
11/07/22 (Phase 1B),
04/28/24 (Phase 2A),
04/01/25 (Phase 2B/2C) &
01/10/24 (Phase 3)
$140.7 03/13/28 $95.3
Most Recent CIP
Approved Budget
$95.3 07/01/25 $98.9 03/13/28
Current StatusCER Awarded Construction
135% Design 95% Design
Q2 - FY23-24
03/13/28 $140.7 03/13/28$140.7
Table 5. Budget and Schedule Trend Summary
$34.2 $34.2 $34.2 $37.4$24.3
09/24/21 09/28/22
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)
Q2 - FY23-2405/14/21
07/29/19 (Phase 1),
10/01/19 (Phase 2) &
03/31/24 (Phase 3)
09/09/20 (Phase 1),
05/11/22 (Phase 2) &
10/31/24 (Phase 3)
FY24-33
$157.8 02/28/29
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
Project Name
Project Initiation Most Recent CIP
Approved Budget Current StatusCER Awarded Construction135% Design 95% Design Table 5. Budget and Schedule Trend Summary (continued) 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 TBD TBD $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 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.

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 CD (Conceptual Design), SD (Schematic Design), and CD (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.
10039119 - Early Intake Dam – Long Term
FY24-33 06/30/23 06/30/25 12/31/26 12/31/28 04/01/31 Q2 - FY23-24 10037351 - Moccasin Dam & Reservoir Long-Term
Improvements3
FY24-33 05/03/21 06/28/24 12/31/25 12/30/27 12/04/29 Q2 - FY23-24 10014115 - Cherry Dam Spillway - Short Term Improvements FY24-33 03/01/21 06/28/24 09/30/24 02/05/25 12/18/25 Q2 - FY23-24 $43.709/16/25 09/16/25 09/16/25 09/16/25
Q2 - 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
Q2 - 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 04/01/29 Q2 - FY23-24 N/A (Subproject 1) &
N/A (Subproject 2)6
N/A (Subproject 1) &
N/A (Subproject 2)6
TBD TBD $5.2 06/30/2412/30/27$29.4 $29.4 12/30/27 TBD TBD TBD 04/04/24
10014108 - Canyon Tunnel Rehabilitation - 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 Q2 - FY23-24
FY24-33 10/03/11 12/29/17 05/15/18 07/31/19 10/13/20 Q2 - FY23-24 - 04/29/22 03/23/23
02/03/14 03/17/23 03/30/16 09/19/24 05/01/27 Q2 - FY23-24 $44.3 12/30/25
12/31/2512/31/24
8 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23)

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
$140,662 $140,662 $157,752 $22,620 ($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 $1,512 ($13,665) (50%) 12/01/27 12/01/27 02/28/28 (89) 10014086
Moccasin
Powerhouse and
GSU
Rehabilitation
MP
$66,714 $66,714 $100,556 $36,883 ($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 Q2-FY2023-2024 (10/01/23 - 12/31/23) 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)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
10014087
Warnerville
Substation
Rehabilitation
CN $34,248 $34,248 $37,407 $23,091 ($3,159) (9%) 11/25/26 11/25/26 11/25/26 0 10039568
Moccasin
Switchyard
Rehabilitation
PL
$9,739 $9,739 $19,708 $170 ($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 $37,327 $30,745 $642 2% 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 $7,411 ($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 $264 ($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 Q2-FY2023-2024 (10/01/23 - 12/31/23) 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)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
Dams & Reservoirs (Joint)
10032903
O'Shaughnessy
Dam Outlet
Works Phase I
MP $47,981 $47,981 $43,731 $8,709 $4,250 9% 09/17/25 09/17/25 12/31/25 (105) 10037351
Moccasin Dam &
Reservoir Long-
Term
Improvements
PL
$73,176 $73,176 $142,188 $2,847 ($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 $1,638 $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 $268 ($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 $128,587 ($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 Q2-FY2023-2024 (10/01/23 - 12/31/23) 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)
(**) (+) (++) (+++) (+++) (+) (++) (+++)
10037077
Moccasin Old
Powerhouse
Hazard
Mitigation
PL $17,401 $17,401 $13,475 $685 $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 $3,296 $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 $1,609 ($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 $1,796 ($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 Q2-FY2023-2024 (10/01/23 - 12/31/23)

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
$ 22.62 M
Project Schedule:

Approved
Forecast
07/01/19
07/01/19
03/13/28
02/28/29
Project Percent Complete: 18.0%
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 11/28/23 A 04/28/24 08/07/25
D 01/27/22 A 06/27/24 04/01/25 08/30/28
E 08/10/22 A 09/21/23 A 01/10/24 07/24/25
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 RSP and Valve Improvements; and
(E) Phase 3 - Tesla Surge Tower – HH-1009. Phase 1A and Phase 1B, both contractors focused on valve procurement, work plans for the outage, and site excavation, and began pipeline construction when the outage began on December 5th. Phase 2 the project team completed 95% design. To
meet the schedule to install the crossover valve during the system outage in 2024/25, the team decided to split out a sub-phase 2A for bidding. The contract HH-1012 (Phase 2A) was advertised in November and bid opening is anticipated in January 2024. The project team also engaged another
consultant to perform an Independent Technical Review of the 95% design. Phase 3 had a successful bid opening in November with seven bidders; all bids came under the
Engineer Estimate. Contract award and issuance of Notice to Proceed (NTP) are expected in next Quarter.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The increase in budget is partly due to escalation and partly due to additional scope in Phase 3 Tesla Surge Tower including 1) a recirculation system to prevent stagnant water in the surge tower and 2) replacement of the existing spillway concrete chute as structural integrity of the wall and slab have been compromised due to erosion.

HH-1006 Construction of New Removable Spool Piece at
Tesla Portal
13 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 1.51 M
Project Schedule:

Approved
Forecast
09/18/20
09/18/20
12/01/27
02/28/28
Project Percent Complete: 5.9%
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 geotechnical core drilling and underground survey
were
completed in December 2023. The Draft Design Criteria
Report (DCR) was submitted in October 2023. The 35%
Design drawing package is anticipated by March 2024.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. 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 cost, and increase in construction labor cost. A new cost estimate will be submitted as part of the 35% design package next quarter.

Penstock Tie-in Point and Proposed Valve House Location 14 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 36.88 M
Project Schedule:

Approved
Forecast
01/04/16
01/04/16
12/03/27
12/31/28
Project Percent Complete: 61.6%
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. Subproject A contract HH-1003R Closeout
Commission agenda item was approved in November 2023.

Final Closeout report is scheduled for January 2024. For Subproject B contract DB-121R2 for the Generator M2
rehabilitation, the contractor completed Generator M2
disassembly in December 2023 and anticipates partial
utilization of Generator M2 by April 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. The Technical Steering Committee will review the 35% design package and cost estimate; presentation to them by the project team will be in the next quarter. The 65% design package is
anticipated in June 2024.

Issues and Challenges:

Installing Rotor Rim to Generator Shaft
and procurement costs, additional construction
management and support costs, and a one-year
construction period extension to allow more time for
coordination.
15 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 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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 Project Cost:

Approved
Forecast
Actual
$ 34.25 M
$ 37.41 M
$ 23.09 M
Project Schedule:

Approved
Forecast
09/01/15
09/01/15
11/25/26
11/25/26
Project Percent Complete: 67.7%
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
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” HH-1008 (which would be issued only if needed), the
contingency contract that would provide emergency
temporary replacement of any breakers that fail until they can be permanently replaced continued to be developed. For
Subproject C Warnerville Substation Rehabilitation Phase 2, the design team issued the 65% design package in
November 2023. The 95% design package is scheduled for
March 2024.

Issues and Challenges:

The budget and schedule forecasts have 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. A class 2 cost estimate is due as part of the 95% design package.

High Voltage Disconnect Switches (WSR Phase 2)

TBD TBD TBD TBD
16 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 0.17 M
Project Schedule:

Approved
Forecast
11/01/22
11/01/22
11/30/28
01/31/30
Project Percent Complete: 3.1%
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 Moccasin Switchyard is a 230kV switchyard
operationally
divided into a 230kV system and a 115kV system. The project objective is to replace the aging oil circuit breakers and H-Bus configuration with new circuit breakers and a more reliable bus configuration. The project will also address the need for back-up power supply for the town of Moccasin. A task order for consultant support during the planning phase has been delayed, but is scheduled to kick off in February 2024.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. Because the project is in early planning, clarifying the operational and reliability needs and requirements and determining the latest technology in circuit breakers and bus configurations for rehabilitation of the switchyard will result in scope refinement that may impact the cost assumptions. The forecasted total project cost increased due to updated work plans and revised escalation cost. The forecasted 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 for both the consultant and SFPUC.

Existing Moccasin Switchyard
17 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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 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
$ 37.33 M
$ 30.75 M
Project Schedule:

Approved
Forecast
12/02/19
12/02/19
01/31/25
01/31/25
Project Percent Complete: 88.7%
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 started conductor installation during the planned
outage from October 1st and finished on December
15th. All wire installation was completed successfully. Hetch Hetchy Operations will energize the lines following
coordination with other utility agencies.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The change in budget is a result of the reduced forecast cost at completion for the project.

Clipping in New Conductor to Insulator at Tower 503S
18 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 7.41 M
Project Schedule:

Approved
Forecast
02/01/16
02/01/16
02/28/28
12/08/34
Project Percent Complete: 16.8%
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 and site visits were held
with Hetch
Hetchy Water and Power, consultants, and SFPUC
management teams to review the proposed alternatives,
geologic constraints, site conditions, and the evaluation process. The independent technical review team visited the site in October and provided comments on the long-term
replacement alternatives, pros and cons associated with each alternative, and potential challenges during construction. The initial review was completed in this quarter and preliminary responses and action items were shared with the team. The lead consultant visited the site with the project team in November to conduct preliminary geologic reconnaissance, site evaluation for the proposed alternatives, and potential constructability challenges.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. 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 Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 0.26 M
Project Schedule:

Approved
Forecast
12/14/22
12/14/22
06/30/31
05/31/29
Project Percent Complete: 0.7%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 03/03/25 05/01/26 02/01/27 11/30/28
Progress and Status:

Conceptual design is underway for the revised
building
program.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The change in cost forecast is a result of increased building square footage due to better understanding of space requirements and escalation cost.

However, the forecasted completion date is anticipated to be earlier following evaluation of the required construction duration.

Site Rendering of Engineering and Records Building and
Surface Parking Lot (from AAR dated July 2020).
20 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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. 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
$ 8.71 M
Project Schedule:

Approved
Forecast
02/01/18
02/01/18
09/17/25
12/31/25
Project Percent Complete: 23.4%
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 03/01/24 11/01/24 09/30/25
C 12/02/22 A 03/13/23 A 08/28/23 A 06/30/25
Progress and Status:

Subproject A (Bulkhead): The design phase
under DB-135 is
currently in progress. An underwater investigation was
performed in December to verify the condition and dimension of the bulkhead slots, and to test methods for underwater removal of rust and tubercles at the sealing surfaces.

Subproject B (Drainage & Miscellaneous Dam
Improvements): The drawings, specifications, and
construction bid package for the improvements are being finalized. Subproject C (Instream Flow Release Valve
Replacement): Construction under JOC contract (JOC-87-06) for modification of the tunnel access building was completed.

Contractor for the main instream valve replacement
construction under contract (HH-1011) began mobilization and site preparation. 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. 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.

Insertion of Bulkhead Mockup Frame into Gate Slots for
Underwater Investigation
21 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 2.85 M
Project Schedule:

Approved
Forecast
05/03/21
05/03/21
06/30/28
12/29/34
Project Percent Complete: 4.0%
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:

An extensive field geotechnical investigation program was completed
in November 2023 to determine the foundation
condition for the proposed spillway. An engineering study continued to evaluate an alternative layout with a lower spill crest to optimize the design and reduce cost.

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.

Moccasin Dam Spillway Geotechnical Exploration
22 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 1.64 M
Project Schedule:

Approved
Forecast
03/01/21
03/01/21
11/01/27
06/30/27
Project Percent Complete: 7.4%
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:

Engineering consultant continued planning work for
improvements to provide flow capacity and erosion protection for flows up to 2,000 cfs for the upper spill channel. The reduced scope requirements will be presented, and cost
estimate refined in a future combined Alternatives
Analysis/Conceptual Engineering Report.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The changes in forecasted scope, budget, and schedule are a result of findings from an updated engineering study that modified the design criteria for short- term improvements to re-establishing the damaged spill
channel section and armoring the upper spill channel for protection against erosion from spillway discharges of up to 2,000 cubic feet per second.

Cherry Valley Dam Spillway
23 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 0.27 M
Project Schedule:

Approved
Forecast
06/30/23
06/30/23
06/30/31
12/31/35
Project Percent Complete: 1.1%
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 engineering consultant completed conceptual layouts for twenty
alternatives to address the identified site, operational, and environmental constraints.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The original estimate was based on an order of magnitude estimate. The 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, environmental compliance requirements, and
additional escalation costs. The cost and schedule will be re- evaluated when the Alternatives Analysis under the Planning Phase is complete.

Early Intake Dam and Spillway Aerial View
24 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 128.59 M
Project Schedule:

Approved
Forecast
10/03/11
10/03/11
06/03/27
06/03/27
Project Percent Complete: 54.9%
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:

For the Mountain Tunnel Improvements Project significant work was accomplished at the Priest Reservoir site including completion of the Flow Control Facility Shaft final lining and removal of the protective decking over the water pipes in the shaft. Installation of the waterproofing membrane in the New Priest Adit was completed. Construction continued on the large cut walls on Adit Roads 5/6 and 8/9. A large grout plant was set up at the Priest Portal and significant other work took place preparing for Outage No. 3, which began on December 5th. In Tunnel repair work of the concrete lining was started along with drilling holes in the lining for contact grouting (to fill voids behind the tunnel lining). The old rock trap was filled in with concrete as it is no longer needed due to the new rock trap that was constructed in Outage No. 2 Discussions
between the City and the contractor regarding work at the South Fork location are continuing.

The budget and schedule forecasts have been updated
to reflect the FY25-34 CIP. Work at the South Fork
location, including roadway improvements, construction of a new shaft and siphon, and siphon extension, are behind
schedule. This work was planned to be completed by the
end of Outage 3 - March 2024. Adit 5/6 and 8/9
roadway improvements are behind schedule. The budget
increase is forecasted to be needed for increased
anticipated costs for South Fork construction, construction management services, and site security.

Looking up from the bottom of the newly completed Flow Control Facility ShaftIssues and Challenges:
25 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 0.68 M
Project Schedule:

Approved
Forecast
01/01/21
01/01/21
06/30/28
07/01/30
Project Percent Complete: 4.2%
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:

Comments are being incorporated into the draft
Alternatives
Analysis Report.

Issues and Challenges:

The budget and schedule forecasts have been updated to
reflect the FY25-34 CIP. The forecasted changes to budget, schedule, and scope are a result of the decreased estimated 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 Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 3.30 M
Project Schedule:

Approved
Forecast
02/27/20
02/27/20
12/30/27
06/30/24
Project Percent Complete: 18.7%
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, it was determined that a short- term rehabilitation project to mitigate risks followed by a longer-term bridge replacement project at the same time as dam rehabilitation in the future would be the best alternative to mitigate failure risks as soon as possible. The draft Alternative Analysis Report is being revised to further develop the alternative for rehabilitation followed by replacement of the existing bridge. For the O’Shaughnessy Adit Access
Bridge, the project team completed material testing and load rating analysis 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.

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 Lake Eleanor Dam Bridge rehabilitation and replacement design and construction scopes to the Eleanor Dam Rehabilitation project, and the O’Shaughnessy Adit Access Bridge rehabilitation design and construction scopes to the Canyon Tunnel - Hetchy Adit Rehabilitation project. This current project will continue to report Planning Phase status for both projects until the end of FY23/24.

Concrete Footings and Piers of the O’Shaughnessy Adit
Access Bridge
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast N/A N/A N/A N/A
27 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23)

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
$ 1.61 M
Project Schedule:

Approved
Forecast
02/03/14
02/03/14
12/30/26
12/31/30
Project Percent Complete: 12.8%
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:

During the quarter, it was decided
to add the scope for the
O’Shaughnessy Adit Access Bridge to this project because both subprojects will be covered under the same
Environmental Impact Report (EIR) and thus will be on the same construction schedule. The project team continued
developing the 95% design package; the material testing and load rating analysis results for the O'Shaughnessy Adit Access Bridge will be incorporated into the final 95% design package. The project 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 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 and the longer time needed to complete the EIR.

Canyon Tunnel - Hetchy Adit Bulkhead

28 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23) 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
$ 1.80 M
Project Schedule:

Approved
Forecast
01/03/22
01/03/22
04/07/26
02/20/28
Project Percent Complete: 19.0%
Key Milestones Environmental
Approval
Bid Advertisement Construction NTP Construction Final
Completion
Current Forecast 02/22/23 A 10/12/23 A 04/04/24 08/19/27 Progress and Status:

The Moccasin Wastewater Treatment Plant Replacement,
HH-1010, was
advertised in October. Five bids were received
by the bid opening date in November and bids were
evaluated. It is anticipated that the Commission will be requested to approve award of the Construction contract in the 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 forecasted cost and schedule duration.

Existing Moccasin Wastewater Treatment Plant
29 HCIP Quarterly Report Q2-FY2023-2024 (10/01/23 - 12/31/23)

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 $12,280,425 $15,042,045 0 ($2,761,620) 71.5% 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 4.7% Power Infrastructure
10014086 - Moccasin Powerhouse
Transformers Installation - (Contract A,
HH-1003R)
06/07/21 06/26/23 06/26/23 $3,730,105 $3,730,105 0 $0 100.0% 10014086 - Moccasin Powerhouse
Generator Rehab - (Contract B,
DB-121R2)
08/15/22 06/17/25 06/17/25 $27,022,010 $27,022,010 0 $0 62.1% 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 $24,127,699 $24,177,763 0 ($50,064) 96.0% Joint Infrastructure
10032903 - O'Shaughnessy Dam Outlet
Works Phase 1 - Instream Flow
Release (Contract C, HH-1011)
08/28/23 06/30/25 06/30/25 $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 $143,485,476 $144,120,833 0 ($635,357) 50.8% 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 Final Completion includes all approved, pending, and potential change orders, and trends.

Program Total for On-
Going Construction $243,626,590 $247,073,631 ($3,447,041) (1.4%) 30 +&O34XDUWHUO\5HSRUW 4)<
±

352-(&76,1&/26(287
There are no active projects currently in closeout phase. &203/(7('352-(&76
There are no completed projects.
31 +&O34XDUWHUO\5HSRUW 4)<
±

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32 Appendices

APPENDICES

A PROJECT DESCRIPTIONS

B APPROVED PR

OJECT LEVEL SCHEDULES / BUDGETS
C LIST

OF ACRONYMS
HClP Quarterly Report Q2-FY2023-2024 (10/01/23 – 12/31/23) This page is intentionally left blank
HClP Quarterly Report Q2-FY2023-2024 (10/01/23 – 12/31/23) APPENDICES Q2-FY2023-2024 (10/01/23 – 12/31/23)
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 Q2-FY2023-2024 (10/01/23 – 12/31/23)
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.

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APPENDICES Q2-FY2023-2024 (10/01/23 – 12/31/23)
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 Q2-FY2023-2024 (10/01/23 – 12/31/23)
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 Q2-FY2023-2024 (10/01/23 – 12/31/23)
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 Q2-FY2023-2024 (10/01/23 – 12/31/23)
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 Year
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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Q2-FY2023-2024 (10/01/23 – 12/31/23)