1 Hetch Hetchy Capital Improvement Program
Q2 | FY 2021
–
2022
March 22, 2022
Katie Miller, Director
Water Capital Programs
Infrastructure Division
Planning (6),
$223M
Design (1),
$38M
Bid & Award
(0), $0
Construction (4),
$280M
Close-Out (1),
$23M
Completed (0),
$0
Multiple Phase (2),
$166M
Not
Initiated (2),
$25M
On-Hold (1), $8M
$763M
(17 Projects)
* Excluded 3 Project
Development Projects ($44M)
Project Count by Phase*
HCIP Program Status (as of December 2021)
24%
% Complete
Expenditures
HCIP Program Cost Summary
(from Table 3.1)
3 Program Name Expenditures to
Date ($Million)
Current Approved
Budget ($Million)
Current
Forecasted Cost
($Million)
Cost Variance
($Million)
Water Infrastructure $9 $110 $153 ($44)
Power Infrastructure $56 $204 $204 -
Joint Infrastructure $70 $494 $495 ($2)
Overall HCIP $134 $807 $853 ($46)
Highlights of Reporting Period
4 • Moccasin Dam Long Term Improvements completed Alternatives Analysis Report; preferred alternative is to construct auxiliary spillway to increase spillway capacity.
• San Joaquin Pipelines (SJPL) Tesla Valve Replacement - the 66-inch diameter butterfly valve and actuator and the 24-inch diameter butterfly valve all arrived on site in time for installation during next quarter’s system shutdown.
• Transmission Lines 7/8 Upgrades Environmental phase complete with publication of Addendum; 100% design next quarter.
Mountain Tunnel Improvements
5 Progress and Status:
• Excavation and construction of
retaining walls for Flow Control Facility
(FCF) shaft at Priest completed.
• FCF shaft collar constructed (photo).
• FCF shaft dug to 35 feet.
• Continued road access improvements;
adit excavation and retaining walls
substantially completed.
• Preparation for outage Jan-Mar 2022.
Approved Budget: $238.2M
Forecast Completion: June 2027
Current Phase: Construction
Expended to Date: $54.6M
Variances:
• $0
• 0 days
2022-2026 Mountain Tunnel Outages
6 4 Jan. – 8 Mar.
2022
64 days
3 Jan. – 8 Mar.
2023
64 days
5 Dec. 2023 – 15
Mar. 2024
102 days
3 Dec. 2024 – 14
Mar. 2025
102 days
2 Dec. 2025 – 13
Mar. 2026
102 days
Moccasin Powerhouse (MPH) and
Generator Step Up Transformer (GSU)
Rehabilitation
7 Progress and Status:
• New GSU1 transformer received
(photo); to be installed during Q3
shutdown.
• GSU1 and GSU2 relay panels
received; installed in Powerhouse.
• Generator Rewind 100% design for
long-lead items completed.
• Needs Assessment Report for
MPH Systems Upgrades approved
by Technical Steering Committee.
Approved Budget: $66.7M
Forecast Completion: Dec 2027
Current Phase: Multiple Phases
Expended to Date: $7.8M
Variances:
• $0
• 234 days over
San Joaquin Pipelines (SJPL) Valve and
Safe Entry Improvement
8 Progress and Status:
• Phase 1A achieved 100% design;
contract advertised.
• Phase 1B achieved 95% design.
• Phases 2 and 3 in planning.
• No variances in the quarter;
variances in the past due to
resequencing to lessen impact on
water delivery.
Approved Budget: $98.9M
Forecast Completion: March 2028
Current Phase: Multiple Phases
Expended to Date: $3.3M
Variances:
• $43.8M (30.7%) over
• 0 days
QUESTIONS?
Services of the San Francisco Public Utilities Commission
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 15, 2022
TO: Commissioner Anson Moran, President
Commissioner Newsha Ajami, Vice President
Commissioner Sophie Maxwell
Commissioner Tim Paulson
FROM: Dennis Herrera, General Manager
RE: Hetch Hetchy Capital Improvement Program Quarterly Report 2 nd Quarter / Fiscal Year 2021-2022
Enclosed please find the Hetch Hetchy Capital Improvement Program (HCIP) Quarterly Report for the 2 nd Quarter (Q2) of Fiscal Year (FY) 2021-2022. 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, 2021 to December 31, 2021.
Quarterly Report Format Changes
In response to the Commission’s request for providing a summary of program status as well as notable changes and accomplishments, this report includes an Executive Summary, which provides the requested high-level summary of the program current status as well as key project updates that may be newsworthy or noticeable to the Commission, stakeholders, or public.
Attachment
This page is intentionally left blank.
QUARTERLY REPORT
Hetch Hetchy Capital Improvement Program
October 2021 – December 2021
Published: March 15, 2022
DRAFT
This page is intentionally left blank.
i
Q2-FY2021-2022 (10/01/21– 12/31/21)
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 Improvemen t 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, 2021 to December 31, 2021.
Starting with the HCIP Q1FY22, the last quarterly re port, the projects of the HCIP and each of their scopes, budgets, and schedules, match the Commi ssion’s approved FY21-30 10-Year Capital Plan, specifically the FY21-30 10-Year Hetch Hetchy Water Capital Improvement Program (CIP), and serve as the FY22 baseline for the HCIP.
In this Q2 report, the forecasts for the HCIP projects’ scopes, costs, and schedules match the FY23-32 10-Year CIP that is being presented to the Commission on February 8, 2022. Going forward, proposed changes to the approved projects and their baseline scopes, schedules, and budgets will continue to be presented for review and approval as part of th e 10-year CIP that is up dated every two years and approved by the SFPUC Commission. The proposed revisions to the program will become the new baseline for project scopes, schedules, and budgets in the beginning of the new fiscal year, July 1 of each bi-annual year, following approval by both SFPUC Commission and the Board of Supervisors (BOS).
Program Current Status:
Overall steady progress continued on the program. As of the end of the reporting period, the HCIP includes 17 projects (excluding the PD accounts) as follows: two (2) projects not initiated, one (1) project on-hold, seven (7) projects in planning or design, four (4) projects in construction, two (2) projects that are multiple phases, and one (1) project in close-out.
The following Tables provide a high -level summary of the cost and sc hedule status for this program (including the 3 PD accounts). The forecasted overruns in projects’ cost and schedule presented here, Planning (6)
$223M
Design (1)
$38M
Bid & Award
(0) $0
Construction
(4) $280M
Close‐Out (1)
$23M
Completed
(0) $0 Multiple
Phase (2)
$166M
Not Initiated
(2) $25M
On‐Hold (1)
$8M
Approved Budget for Projects in Each Phase
ii
Hetch Hetchy Capital Improvement Program Quarterly Report as noted above, match the 10 – Year CIP for FY23- 32 which will be presented to the Commission for review and approval next quarter.
* Negative number reflects cost increases since last quarter, and positive number reflects cost reduction since last quarter.
Program Key Update:
The key update for the HCIP includes:
• The overall forecasted cost and schedule at completion for the HCIP have been updated to match the budget and schedule that will be presented to the Commission as part of the FY23-32 10-Year CIP. The overall forecasted budget for
the HCIP is $45.51M higher than the current
Approved budget.
• For the SJPL Tesla Valve Replacement project, the
66-inch diameter butterfly valve and
actuator and the new 24-inch diameter butterfly valve all arrived on site in time for installation during next quarter’s system shutdown.
• The SJPL Valve and Safe Entry Impr
ovements Phase 1A construction contract (HH-1005) was
advertised during the quarter. For Phase 1B, the 95% design was completed in October, and it is anticipated that the construction contract (HH-1006) will be advertised next quarter. Project scope refinements during design including re-sequencing of construction to minimize risks during shutdowns, resulted in a forecasted cost increase of $43.7M.
Table A. Program Cost Summary
Program
Expenditures
To Date
($ Million)
(A)
Current
Approved
Budget
($ Million)
(B)
Q2/FY21-22
Forecasted
Costs
($ Million)
(C)
Cost
Variance
($ Million)
(D = B - C)
Cost
Variance
Over
Reporting
Period *
($ Million)
(E )
Program Total $134.29 $807.30 $852.81 ($45.51) -
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 11/08/10 11/08/10 05/25/37 10/30/35 18.8 Early
iii
Q2-FY2021-2022 (10/01/21– 12/31/21)
For the Moccasin Powerhouse Bypass Upgrades pr oject, the consultant submitted the final Needs Assessment Report (NAR) during the quarter.
For Moccasin Powerhouse (MPH) and Generator Step-Up (GSU) Rehabilitation, Subproject A, MPH GSU Transformer Installation, the contra ctor received delivery of the new GSU1 transformer in October. For subproject B, DB-121R2 MPH Generators Rehabilitation, the Notice to Proceed for Construction is scheduled for June 2022. For subproject C, MPH Systems Upgrades, the Needs Assessment Report (NAR), including its prioritization of scope items, was reviewed and approved by the Technical Steering Committee (TSC) in November. For Transmission Lines 7/8 Upgrades project, significant progress was achieved in the environmental phase with the completion of a re quired addendum to include this work in the existing Final Mitigated Negative Declaration for the Rehabilitatio n of the Existing San Joaquin Pipelines. The design engineering consultant is on track to submit the 100% design next quarter.
For the Moccasin Penstock Rehabilitation projec t, the condition assessment and the structural evaluation reports have been finalized.
For the O’Shaughnessy Dam Access and Drainage Improvements project, Notice to Proceed was issued on September 27, 2021 for Contract HH-1002R. The contractor mobilized in November and installed fall protection in the inclined stairways and on the drum gate ladders during the quarter.
For the O’Shaughnessy Dam Outlet Works Phase 1 project, major scope changes are forecasted based on new prioritization of three projects now included in Phase 1: replacement of the damaged existing instream flow release (IFR) valves; drainage improvem ents within the dam gallery; and installation of new bulkheads (o riginal scope). The revised scope and scope refinements have resulted in a forecasted cost increase of $26.7 million. For the Moccasin Dam Long-Term Improvements project, the Alternative Analysis Report (AAR) was completed in December. The AAR co nfirmed that the preferred alternative to increase spillway capacity is to construct an auxiliary spillway. The engineering consultant will begin the conceptual engineering phase in the next quarter. For the Mountain Tunnel Improvement project during the quarter, the retaining wall and the mass surface excavation for the Flow Control Facility (FCF) shaft were completed; the FCF shaft concrete collar was constructed; and the shaf t was excavated to a depth of thirty-five feet.
In addition, the Priest Adit re taining wall was substantially comp leted, and construction of the adit commenced. Also, the temporary water treatm ent plant below Priest Reservoir to treat construction water was substantially complete d along with the temp orary water treatment plant to provide drinking water to Moccasin during the five Mountain Tunnel shutdowns planned for this project. Significant preparat ion took place for the first of the planned Mountain Tunnel shutdowns that starts in January.
For the Bridge Replacement O’Shaughnessy Adit Access Bridge subproject, the Geotechnical Data Report (GDR) has been finalized.
iv
Hetch Hetchy Capital Improvement Program Quarterly Report This page is intentionally left blank.
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 Close-Out
10. Completed Projects
APPENDICES
A. Project Descriptions
B. Approved Project Level Schedules/Budgets
C. List of Acronyms
This page is intentionally left blank.
HETCH HETCHY WATER AND POWER (HHWP)–
WATER DIVISION CAPITAL IMPROVEMENT PROGRAMS
This page is intentionally left blank.
Q2-FY2021-2022 (10/01/21 – 12/31/21)
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 programs 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 group 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.
This page is intentionally left blank.
HETCH HETCHY CAPITAL IMPROVEMENT PROGRAM (HCIP)
This page is intentionally left blank.
1 Q2-FY2021-2022 (10/01/21 – 12/31/21)
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 objectiv es 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:
Buildings – projects to provide safe and
code compliant work spaces.
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.
Powerhouses – projects to improve
facilities at the Holm, Kirkwood, and
Moccasin powerhouses.
Roads & Bridges – projects intended to
replace bridges that are utilized to
access HHWP assets.
Switchyard & Substations – projects to
meet operational objectives for power,
including reliability, regulatory
compliance, and sustainability.
Tunnels – projects to repair tunnels
along the HHWP system (other than
Mountain Tunnel).
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.
2. PROGRAM STATUS
This second (2nd) quarter report for FY2021-2022
presents the progress made on the HCIP
between October 1, 2021 and December 31,
2021. As announced in the first (1
st) Quarter
report for FY2021-2022, project scopes, budgets
and schedules in the Commission’s approved
10-Year Capital Plan for FY21-30, approved by
PUC Commission on February 11, 2020, serve
as the approved baseline herein for comparison
to current program and pr oject scope, schedule,
and budget forecasts. This baseline for
comparison will remain the same until
adoption of a new 10-Year CIP and the start of
the fiscal year following adoption.
There are seventeen (17) projects in the HCIP
together with (3) project development (PD)
accounts for program-level expenditures for
each of the Water, Power, and Joint Programs.
A description of each project and of each
project development account is provided in the
Appendix A of this Report.
2 Hetch Hetchy Capital Improvement Program Quarterly 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, 2021 ( PD accounts
do not have phases and are not included in
Figure 2.1). The number of projects currently in
each phase is shown in parentheses.
Figure 2.2 shows the total number of projects in
the following stages as of December 31, 2021:
Pre-construction, Construction, and Post-
construction.
Figure 2.3 summarizes the environmental
review status of the HCIP projects as of
December 31, 2021. Environmental review is
performed for projects under California
Environmental Quality Act (CEQA).
3. PROGRAM COST SUMMARY
Table 3 provides an overall cost summary of the
approved 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. The Current Approved
Budget for the HCIP under the FY21-30 CIP is
$807.30 million, while the HCIP Q2FY21-22
Forecasted Cost is $852.81 million, which is
$45.51 million over the Approved Budget. This
is the same program Cost Variance as last
quarter.
Figure 2.2 Number of Projects in Pre-construction,
Construction, and Post-Construction
Figure 2.1 Approved Budget for Projects in Each
Phase
Figure 2.3 Program Environmental Review
3 Q2-FY2021-2022 (10/01/21 – 12/31/21)
Table 3. Cost Summary
Subprograms
Expenditures
To Date
($ Million)
(A)
Current
Approved
Budget
($ Million)
(B)
Q2/FY21-22
Forecasted
Costs
($ Million)
(C)
Cost
Variance
($ Million)
(D = B - C)
Cost
Variance
Over
Reporting
Period
($ Million)
(E )
Water Infrastructure $8.70 $109.53 $153.27 ($43.74) -
Water Conveyance (Water) $4.86 $102.66 $146.40 ($43.74) - Water Infrastructure Project
Development $3.85 $6.87 $6.87 - -
Power Infrastructure $55.62 $204.24 $204.24 - -
Powerhouse $28.58 $120.94 $120.94 - -
Switchyard & Substations (Power) $21.88 $34.25 $34.25 - - Transmission Lines $2.71 $37.97 $37.97 - -
Power Infrastructure Project
Development $2.46 $11.09 $11.09 - -
Joint Infrastructure $69.98 $493.52 $495.29 ($1.77) -
Dams & Reservoirs (Joint) $7.93 $167.45 $184.13 ($16.69) - Mountain Tunnel $54.60 $238.22 $238.22 - -
Roads & Bridges (Joint) $1.22 $44.29 $29.37 $14.92 - Tunnels (Joint) $0.59 $8.43 $8.43 - -
Utilities (Joint) $0.42 $8.79 $8.79 - -
Joint Infrastructure Project
Development $5.22 $26.34 $26.34 - -
Overall Program Total $134.30 $807.30 $852.81 ($45.51) - * Negative number reflects cost increases since last quarter, and positive number reflects cost reduction since last quarter.
4 Hetch Hetchy Capital Improvement Program Quarterly Report The overall program negative Cost Variance of
$45.51M in Table 3 can be attributed to the
following factors:
• $43.74M negative variance is due to the
following Water Infrastructure project:
o The 10035575 SJPL Valve and Safe
Entry Improvements forecasted costs
increased by $43.74M.
• $1.77M negative variance is due to the
combined positive and negative
variances in the following Joint
Infrastructure projects:
o The 10032903 OSD Outlet Works
Phase I forecasted cost
increased by
$26.69M.
o The 10037351
Moccasin Dam Long-
Term Improvements forecasted cost
decreased by $10.00M.
o The 10035086 Bridge Replacement (4
Bridges) forecasted cost decreased by
$14.92M.
4. PROGRAM SCHEDULE SUMMARY
Figure 4 and Table 4 compare the FY 21 –
30 CIP
Approved Schedule and the Current Forecast
Schedule for the HCIP. As shown in Table 4,
the overall HCIP is currently forecast to be
completed in October 2035, which is 18.8
Months before the Approved Completion of
May 2037.
5. BUDGET AND SCHEDULE TREND
SUMMARY
Starting with the Q1 FY21-22 Quarterly Report,
a revised report format includes a new Table 5,
titled 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 of the project. The table
excludes all Project Development accounts, as
well as any projects that are either Not-
Initiated, On-Hold, in Close-Out or Completed.
During this Quarter (Q2 FY21-22), the following
major milestone was achieved and the project
cost and schedule forecasts were updated
based on the updated milestone cost estimate
accordingly for the following HCIP project:
1. 95% Design for Phase 1B of the SJ PL
Valve and Safe Entry Improvement
project
Table 4. FY21-30 CIP Approved vs. Current Forecast Schedule Dates Sub-Program
2021
Approved
Project
Start
Actual
Start
2021
Approved
Completion
Current
Forecast
Completion
Schedule
Variance
(Months)
Water Infrastructure 11/08/10 11/08/10 06/30/31 06/28/30 12 Early Power Infrastructure 05/29/12 05/29/12 06/30/31 10/30/35 52 Joint Infrastructure 10/03/11 10/03/11 05/25/37 06/29/35 22.9 Early Overall
HCIP Program 11/08/10 11/08/10 05/25/37 10/30/35 18.8 Early
All Costs are shown in million
Approved
Budget
Approved
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
abcde fghi jklm n
Water Infrastructure
$3.7 12/30/22 $7.4 06/28/24 $7.4 06/28/24 $7.4 06/28/24 $7.4 06/28/24 $3.7 12/30/22 $3.7 12/30/22 10035575 - SJPL Valve and Safe Entry Improvement
Phase 1A
Phase 1B
Phase 2
Phase 3
Power Infrastructure
$15.0 12/01/27 $15.0 12/01/27 TBD TBD TBD TBD TBD TBD TBD TBD $15.0 12/01/27 10014086 - Moccasin Powerhouse and GSU
Rehabilitation
Phase 1
Phase 2
Phase 3
10014087 - Warnerville Substation Rehabilitation
Phase 1 (DB-127R)
Phase 2a
Phase 2b
$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 TBD TBD $38.0 01/31/25 Joint Infrastructure
$47.3 02/28/28 $13.2 12/31/24 TBD TBD TBD TBD TBD TBD TBD TBD $47.3 02/28/28 $4.0 02/28/23 $5.8 02/26/21 $5.8 02/26/21 $5.8 02/11/22 $5.8 12/16/22 $4.0 02/28/23 $4.0 02/28/23 10032903 - O'Shaughnessy Dam Outlet Works Phase
I
3 Subproject A
Subproject B
Subproject C
Subproject D (Planning Only)
Subproject E (Planning Only)
09/16/2512/31/2409/16/25
$34.2 11/25/26 11/25/26 11/25/26 11/25/26 11/25/26 03/04/20 11/25/26$27.2 $34.2 $34.2 $34.2 $34.2 $24.3 09/09/20 (Phase 1),
05/12/22 (Phase 2) &
03/29/24 (Phase 3)
06/07/21 (Phase 1),
06/08/22 (Phase 2) &
10/02/24 (Phase 3)
Q2 - FY21-22
02/28/25
04/13/27
FY21-30
09/01/15 (Phase 1),
7/01/20 (Phase 2a) &
01/01/21 (Phase 2b)
02/29/16 (Phase 1),
01/18/21 (Phase 2a) &
01/03/23 (Phase 2b)
04/01/16 (Phase 1),
04/22/21 (Phase 2a) &
09/01/23 (Phase 2a)
12/24/16 (Phase 1),
08/16/21 (Phase2a) &
04/04/24 (Phase 2b)
11/26/18 (Phase 1),
N/A (Phase 2a) &
02/03/25 (Phase 2b)
Q2 - FY21-22
Q2 - FY21-22
5/1/2022 (Subproject A),
2/01/2022 (Subproject B) &
1/30/2023 (Subproject C)
Table 5. Budget and Schedule Trend Summary
FY21-30
10035721 - Transmission Lines 7/8 Upgrades
FY21-30 07/01/19
$98.9 03/13/28 $95.3
Most Recent CIP
Approved Budget
Project Name
FY21-30 09/18/20 11/07/22 02/24/23 12/26/23
09/24/21 10/03/22
10036809 - Moccasin Powerhouse Bypass Upgrades
FY21-30 01/04/16 05/14/21
07/29/19 (Phase 1),
10/01/19 (Phase 2) &
9/28/22 (Phase 3)
4/16/2021
03/03/21 (Phase 1A),
05/28/21 (Phase 1B),
05/13/22 (Phase 2) &
12/30/21 (Phase 3)
10035574 - SJPL Tesla Valves Replacement
FY21-30 05/01/19 11/27/20 07/28/20
Q2 - FY21-2203/19/2112/07/202
$66.7 04/13/27 $18.0 10/03/18 $66.7 $66.7 $66.7 $66.7 $66.7 12/03/2712/03/2712/03/2712/03/27 Q2 - FY21-22
$142.7 03/13/2807/01/25 $95.3 07/01/25 $98.9 03/13/28 $142.7 Current StatusCERProject Initiation Awarded Construction135% Design 95% Design 07/14/21 (Phase 1A),
10/29/21 (Phase 1B),
10/27/22 (Phase 2) &
05/06/22 (Phase 3)
05/05/22 (Phase 1A),
09/02/22 (Phase 1B),
07/15/23 (Phase 2) &
01/15/23 (Phase 3)
Q2 - FY21-22
11/17/20 04/06/21
03/13/28 TBD TBD
Q2 - FY21-22
7/1/2019
10014088 - Moccasin Penstock
FY21-30 12/11/18 04/21/23 10/16/23 06/10/24 04/15/25 Q2 - FY21-22 12/1/2022 (Subproject A),
12/1/2022 (Subproject B) &
9/30/2023 (Subproject C)FY21-30 02/01/ 18
9/30/2021 (Subproject A),
Complete (Subproject B),
2/28/2022 (Subproject C),
8/30/2022 (Subproject D) &
8/30/2022 (Subproject E)
12/1/2021 (Subproject A),
11/30/2021 (Subproject B) &
5/31/2022 (Subproject C)
$21.2 $17.2 $47.9
10030758 - OSH Dam Access and Drainage
Improvements
FY21-30 03/01/17 06/28/19 09/01/19 08/21/20 09/27/21 Q2 - FY21-22 TBD TBD TBD $47.909/16/25 TBD TBD TBD
5 All Costs are shown in million
Approved
Budget
Approved
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
Forecasted
Cost
Forecasted
Completion
abcde fghi jklm n
Table 5. Budget and Schedule Trend Summary
Most Recent CIP
Approved Budget
Project Name
Current StatusCERProject Initiation Awarded Construction135% Design 95% Design $83.2 07/01/27 $83.2 07/01/27 TBD TBD TBD TBD TBD TBD TBD TBD $73.2 06/30/28 $11.9 07/01/27 $11.9 07/01/27 TBD TBD TBD TBD TBD TBD TBD TBD $11.9 07/01/27 10014114 - Mountain Tunnel Improvement Project
$238.2 06/03/27 $114.0 12/30/21 $246.1 12/31/26 $238.2 12/31/26 $238.2 12/31/26 $238.2 06/03/27 $238.2 06/03/27 10035086 - Bridge Replacement (4 - Bridges)
Subproject 1
Subproject 2
Footnotes:
1. This represents forecast project cost and project completion date at the time of award of construction contract (or award of CM/GC contracts/packages).
2. This represents the date the Design Criteria Report (DCR) was finalized for Transmission Lines 7/8 Up grade project. CER was not required for the project.
3. This represents that the 95% Design is actually 100% for Subproject A & B.
FY21-30 10/03/11 12/29/17 05/15/18 07/31/19 10/13/20 Q2 - FY21-22 FY21-30 02/27/20 7/15/22 (Subproject 1) &
02/28/23 (Subproject 2)
05/23/22 (Subproject 1) &
05/05/23 (Subproject 2)
02/20/23 (Subproject 1) &
01/12/24 (Subproject 2)
02/01/24 (Subproject 1) &
02/03/25 (Subproject 2) Q2 - FY21-22
TBD TBD TBD $29.4 07/01/2705/25/37$44.3 $44.3 12/30/25 TBD TBD TBD TBD TBD 10037351 - Moccasin Dam Long-Term Improvements 3
FY21-30 05/03/21 07/28/22 06/15/23 02/06/25 06/01/26 Q2 - FY21-22 10014115 - Cherry Dam Spillway - Short Term
Improvements
FY21-30 03/01/21 07/15/22 12/02/22 09/08/23 08/20/24 Q2 - FY21-22 6 Hetch Hetchy Capital Improvement Program Quarterly Report Q2-FY2021-2022 (10/01/21 - 12/31/21)
6. PROJECT PERFORMANCE SUMMARY* All costs are shown in $1,000s as of 12/25/21 % Cost
Changes
(g = f/c)
(+++)
Current
Forecast
Completion
(j)
Current
Approved
Completion
(i)
(++)
Current
Forecast Cost
(d)
Cost
Variance
(f= c - d)
(+++)
Expenditures
To Date
(e)
Current
Approved
Budget
(c)
(++)
Active
Phase
(a)
()
Project Name
Schedule
Variance
(Days)
(k = i - j)
(+++)
CIP Project
Completion
Date
(h)
(+)
CIP
Approved
Budget
(b)
(+)
Water Infrastructure
Water Conveyance (Water)
10035574 - SJPL Tesla Valves
Replacement
CN $ 3,740 $ 1,560$ 3,740 - 12/30/22 12/30/2212/30/220%$ 3,740 0 10035575 - SJPL Valve and Safe Entry
Improvement
MP $ 98,924 $ 3,298$ 142,662 ($43,738) 03/13/28 03/13/2803/13/28-44%$ 98,924 0 Power Infrastructure
Powerhouse
10036809 - Moccasin Powerhouse Bypass
Upgrades
PL $ 15,007 $ 390$ 15,007 - 12/01/27 12/01/2712/01/270%$ 15,007 0 10014086 - Moccasin Powerhouse and
GSU Rehabilitation
MP $ 66,714 $ 7,784$ 66,714 - 04/13/27 12/03/2704/13/270%$ 66,714 (234) Switchyard & Substations (Power)
10014087 - Warnerville Substation
Rehabilitation
CN $ 34,248 $ 21,879$ 34,248 - 11/25/26 11/25/2611/25/260%$ 34,248 0 Transmission Lines
10035721 - Transmission Lines 7/8
Upgrades
DS $ 37,969 $ 2,705$ 37,969 - 01/31/25 01/31/2501/31/250%$ 37,969 0 (+) CIP Approved Budget and Project Completion Date: The budget and schedule approved as part of 10-year CIP for FY21-30.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10-year CIP for FY21-30, plus any additional budget and schedule changes approved by the Commission as part of construction contract award or/ and additional contingencies on construction contracts.
Footnotes:
(+++) Negative number is reflecting cost overrun (Schedule delay) and positive number is reflecting cost underrun (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.
PL DS
BA
Planning Desi gn
Bid & Award Multi ple-PhaseMPCN
Phase Status Legend
Construction
Exclude projects in closeout, completed, not initiated, on hold, deleted projects, and projects combined with other projects. 7 Hetch Hetchy Capital Improvement Program Quarterly Report Q2-FY2021-2022 (10/01/21 - 12/31/21) % Cost
Changes
(g = f/c)
(+++)
Current
Forecast
Completion
(j)
Current
Approved
Completion
(i)
(++)
Current
Forecast Cost
(d)
Cost
Variance
(f= c - d)
(+++)
Expenditures
To Date
(e)
Current
Approved
Budget
(c)
(++)
Active
Phase
(a)
()
Project Name
Schedule
Variance
(Days)
(k = i - j)
(+++)
CIP Project
Completion
Date
(h)
(+)
CIP
Approved
Budget
(b)
(+)
Joint Infrastructure
Dams & Reservoirs (Joint)
10014088 - Moccasin Penstock PL $ 47,251 $ 5,231$ 47,251 - 02/28/28 02/28/2802/28/280%$ 47,251 0 10030758 - OSH Dam Access and
Drainage Improvements
CN $ 3,952 $ 1,172$ 3,952 - 02/28/23 02/28/2302/28/230%$ 3,952 0 10032903 - O'Shaughnessy Dam Outlet
Works Phase I
PL $ 21,206 $ 1,061$ 47,894 ($26,688) 09/16/25 09/16/2509/16/25-126%$ 21,206 0 10037351 - Moccasin Dam Long-Term
Improvements
PL $ 83,176 $ 175$ 73,176 $ 10,000 07/01/27 06/30/2807/01/2712%$ 83,176 (365) 10014115 - Cherry Dam Spillway - Short
Term Improvements
PL $ 11,861 $ 294$ 11,861 - 07/01/27 07/01/2707/01/270%$ 11,861 0 Mountain Tunnel
10014114 - Mountain Tunnel
Improvement Project
CN $ 238,219 $ 54,598$ 238,219 - 06/03/27 06/03/2706/03/270%$ 238,219 0 Roads & Bridges (Joint)
10035086 - Bridge Replacement (4 -
Bridges)
PL $ 44,287 $ 1,219$ 29,371 $ 14,916 05/25/37 07/01/2705/25/3734%$ 44,287 3616 (+) CIP Approved Budget and Project Completion Date: The budget and schedule approved as part of 10-year CIP for FY21-30.
(++) Current Approved Budget and Schedule: The budget and schedule approved as part of 10-year CIP for FY21-30, plus any additional budget and schedule changes approved by the Commission as part of construction contract award or/ and additional contingencies on construction contracts.
Footnotes:
(+++) Negative number is reflecting cost overrun (Schedule delay) and positive number is reflecting cost underrun (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.
PL DS
BA
Planning Desi gn
Bid & Award Multi ple-PhaseMPCN
Phase Status Legend
Construction
Exclude projects in closeout, completed, not initiated, on hold, deleted projects, and projects combined with other projects. 8 Q2-FY2021-2022 (10/01/21 - 12/31/21)
7. PROJECT STATUS REPORT
10035574 - SJPL Tesla Valves Replacement
Project Description: The 2018 approved scope for this pro ject is to replace four lar ge diameter butterfl y valves, namely TUV 101, 201, 301 and 401, inside the Tesla Valve Vault so that each of the four San Joaquin Pipelines (SJPL) can be safel y isolated and shut down individuall y for inspection and repair work without shutting down the entire SJPL system. This pro ject will also improve safet y for entr y into the pipelines for maintenance and inspection purposes. After the planning phase of the related pro ject SJPL Valve and Safe Entr y Improvement (Project 10035575) it was recommended that the scope of SJPL Tesla Valve Replacement be reduced, to focus on completing the replacement of TUV101 only. The remainder of the work (i.e. TUV 201, 301 and 401) has been added to the scope of SJPL Valve and Safe Entry Improvement (Project 10035575) to expedite improvements for TUV101 during the planned winter shutdown from January to February 2022 to facilitate necessary maintenance work for SJPL No. 1 during the remainder of 2022. The installation of TUV201, 301 and 401 will proceed to gether with the up grade work proposed under SJPL Valve and Safe Entr y Improvement, in 2023 and 2024.
Project Status: ConstructionProgram: Water Infrastructure Environmental Status: Completed Project Cost:
Forecast
Actual
$3.74 M
$1.56 M
Forecast
May-19 Dec-22
May-19 Dec-22
Project Schedule:
$3.74 M
Project Percent Complete: 53.1%
Approved Approved
Actual Cost; Forecast Approved;
Bid
Advertisement
Construction
Final Completion
Environmental
ApprovalKey Milestones: Construction
NTP
Current Forecast 05/31/2208/26/20 04/06/21
Delivery of 66-Inch Butterfly Valve to the Tesla Facility Progress and Status:
In this q uar
ter, the project team expedi ted deliv ery of
the City-purchased
66-inch diameter butterfl y valve by
authorizi
ng air-freight delivery to the country. The
actuator was also delivered durin g the q
uarter, and
both valve and actuator were inspected and accepted
by SFPUC staff. The JOC contractor received timel y
delivery of the new 24-inch diameter butterfly valve.
The on-time delivery of these lon g lead t
ime
components was critical in order to meet the
construction window for installation during the
Mountain Tunnel system shutdown scheduled for
next
quarter.
Issues and Challenges:
None at thi
s time.
9 N/A
Hetch Hetchy Capital Improvement Program Quarterly Report 10035575 - SJPL Valve and Safe Entry Improvement
Project Description: The San Joaquin Pipelines (SJPLs) consist of three parallel pipelines approximately 48 miles long (completed in 1932, 1953, and 1968, re spectively) that cross the San Joaquin Valle y from the Oakdale Portal of the Foothill Tunnel on the east end to the Tesla Portal of the Coast Range Tunnel (CRT) on the west.
Portions of a fourth pipeline have also been constructed consisting of 6.4 miles of pipe downstream of Oakdale and 11 miles upstream of Tesla. The hydraulic gradient on the SJPLs was limited by surge stacks/towers a t Oakdale portal (~825 ft) and Tesla portal (~500 ft). The pipelines were intended to be shut down at Oakdale.
As part of the SFPUC’s Water System Improvement Program (WSIP), the Emer y and Pelican crossover vaults were installed and the Roselle crossover vault was modi fied to allow for flows between SJPLs and isolation o f SJPL segments for inspection and maintenance. In a ddition, the Tesla Valve House (TVH) and Tesla Treatment Facility (TTF) were added upstream of the Tesla surge to wer. Like the SJPLs, the crossover vaults and Tesla facilities are rated for the maximum pressures that should occur under normal operating conditions. However, the pipelines and pipeline segments still need to be sh ut down from the upstream end. Closure of multiple in-line valves or all TTF UV reactor valves ca n over-pressurize the pipelines. As in the ori ginal design, complete shutdown of the SJPL system must be done at Oakdale.
The ob jective of this pro ject is to allow safe entr y into an y and all sections of the SJPLs for inspection and maintenance while the remainder of the syst em stays in operation. The scope and bud get of installin g the TUV201, 301 and 401 butterfl y valves has been transferred from pro ject SJPL Tesla Valve Replacement pro ject (10035574) and added to SJPL Valve and Safe Entry Improvement.
Project Status: Multiple PhaseProgram: Water Infrastructure Environmental Status: Active Project Cost:
Forecast
Actual
$98.92 M
$3.30 M
Forecast
Jul-19 Mar-28
Jul-19 Mar-28
Project Schedule:
$142.66 M
Project Percent Complete: 6.2%
Approved Approved
Actual Cost; Forecast Approved;
Bid*
Advertisement
Construction*
Final Completion
Environmental*
ApprovalKey Milestones: Construction*
NTP
(A) 12/08/21Current Forecast (A) 09/30/24(A) 05/04/22 (A) 05/05/22 (B) 03/18/22 (B) 06/07/24(B) 05/04/22 (B) 09/02/22
(C) 01/08/23 (C) 05/24/27(C) 05/04/22 (C) 07/15/23
(D) 07/12/22 (D) 08/01/24(D) 12/06/22 (D) 01/15/23
* (A) Phase 1A – Pipeline 2 Tesla & Oakdale Entry Improvements – HH-1005; (B) Phase 1B – Pipelines 3&4 Tesla & Oakdale Entry Improvements HH-1006; (C) Phase
2 -Pelican, Roselle, Emery and P4J Entry Improvements; and (D) Phase 3 - Tesla Surge Stack
- HH-1009.
Progress and Status:
This project is divided into four (4) sub-pro jects, as specified in the above footnote. For Phase 1A, the 100% design was completed in October and the pro ject team
continued to work on the contract bid documents. The
construction contract (HH-1005) was advertised i n
December, and bids are anticipated to be opened in
January. For Phase 1B, the 95% desi gn was completed
in October and the project team is working on the 100%
design submission. It is anticipated that the
construction contract (HH-1006) will be advertised
next quarter. Phase 2 and Phase 3 of the pro
ject are
still in Planning.
Issues and Challenges:
The forecasted cost is greater than the approved
budget due to scope refinements to further improve
safe entr y and due to resequencin g of construction to better coordinate with s ystem shutdowns in
Fall/Winter so as to mini mize the impact on water
delivery.
10 Q2-FY2021-2022 (10/01/21 - 12/31/21)
10036809 - Moccasin Powerhouse Bypass Upgrades
Project Description: Hetch Hetch y water deliveries are conve yed from Priest Reservoir to Moccasi n Powerhouse (MPH) through the Moccasin Pe nstocks. At MPH, water passes throu gh two hydroelectric turbines where energy is converted from high-pressure water into electricity. When electricit y is not being produced, the water deliveries are directed around the turbines by two bypass valves that dissipate up to 305 million gallons per day (mgd) at 560 pounds per square inch (psi) of water energy. In the past, short-term use of the b ypass system has resulted in significant vibration and cavi tation damage to the bypa ss valves. Long-term use ( greater than two to five days) could lead to ma jor mechanical dama ge or failure, leadin g in turn to the potential o f interruption of water deliveries to San Francisco. This pro ject will provide a reliable h ydraulic b ypass and energy dissipation s ystem for conve ying water around the turbines to the Moccasin Reservoir B ypass Pipeline, allowing for increased operatin g flexibilit y for HHWP to meet scheduled water deliveries even when MPH, Moccasin Switchyard, or power Transmission Lines #3 and #4 are curtailed.
Project Status: PlanningProgram: Power Infrastructure Environmental Status: Not Initiated Project Cost:
Forecast
Actual
$15.01 M
$0.39 M
Forecast
Sep-20 Dec-27
Sep-20 Dec-27
Project Schedule:
$15.01 M
Project Percent Complete: 5.4%
Approved Approved
Actual Cost; Forecast Approved;
Bid
Advertisement
Construction
Final Completion
Environmental
ApprovalKey Milestones: Construction
NTP
08/27/24Current Forecast 06/02/2708/26/24 02/28/25
Turbine bypass valve
Progress and Status:
The consultant submitted the final Needs Assessment
Report (NAR) durin g this quarter and is workin g on
the Alternative Analysis Re port (AAR). Alternatives
that are bein g considered include replacin g the old
bypass valves with new valves inside the powerhouse
as well as movin g the b ypass s ystem to a locatio n
outside of the powerhouse.
Issues and Challenges:
None at this time.
11 Hetch Hetchy Capital Improvement Program Quarterly Report 10014086 - Moccasin Powerhouse and GSU Rehabilitation
Project Description: The two Moccasin Powerhouse generators were completed in 1969 and generate a combined maximum output of 110 megawatts. Both generator units have exceeded their life expectanc y and are in need of repair in order to continue operating reliably. The objective of this project is to replace stator cores and coils. The scope of work also includes rehabilitation of the rotor field poles with new pole cores and re-insulated field coils, replacement of the rotor pole/rim ta il connection system with a new T-tail connection s ystem, and supply of a new rotor rim for each generator following inspection and testing. The pro ject will also include replacement of two generator step-up transformers (G SUs) with new oil containment barriers, and remainin g plant work including: replacing 480V switchgear, 13.8kV switchgear, motor control centers, main control boards, protective relays, and cooling water piping.
Project Status: Multiple PhaseProgram: Power Infrastructure Environmental Status: Active Project Cost:
Forecast
Actual
$66.71 M
$7.78 M
Forecast
Jan-16 A pr-27
Jan-16 Dec-27
Project Schedule:
$66.71 M
Project Percent Complete: 10.6%
Approved Approved
Actual Cost; Forecast Approved;
Bid*
Advertisement
Construction*
Final Completion
Environmental*
ApprovalKey Milestones: Construction*
NTP
(A) 11/20/20
Current Forecast
(A) 05/23/23(A) 09/28/20 (A) 06/07/21
(B) 10/30/20 (B) 06/17/24(B) 09/28/20 (B) 06/08/22
(C) 04/01/24 (C) 06/07/27(C) 09/28/22 (C) 10/02/24
* (A) Moccasin Powerhouse Generator Step-Up (GSU’s) Transformers HH-1003R was re-advertised on 1/14/21; (B) Moccasin Powerhouse Generators Rewind –
DB-121R2; and (C) Moccasin Powerhouse Systems Upgrade.
Delta Star GSU1 Transformer in Spare Slot
Progress and Status:
This project is divided into 3 subprojects, as specified in the above footnote. For subproject A, HH-1003R
Moccasin Powerhouse (MPH) Generator Step-up (GSU)
Transformer Installation, the new Delta Star GSU1
transformer was delivered in October and was
temporarily installed in the spare slot outside the
Powerhouse. The contractor moved the older GSU1 to a
temporary location outside the yard. The disassembled
former spare transformer is still outside of the
switchyard awaiting removal. The new GSU1 and
GSU2 rela
y panels were delivered in November, were
installed in the Powerhouse and are read y to be wired
and tested next quarter. For subproject B, DB-121R2
MPH Generators Rehabilitation, the 100% desi gn
drawings were received for key long-lead items;
construction is scheduled for June 2022. For subpro
ject
C, MPH S ystems Up grades, the Needs Assessment
Report (NAR), includin g the prioritization of scope
items, was reviewed and approved b y the Technical
Steering Committee (TSC) in November 2021. The task
order for consultant plannin g and desi gn support is
anticipated to start next quarter
Issues and Challenges:
Subproject A: The foundation design for GSU1 was
found to be in conflict with the centerline of the rails and underground utilities. This conflict resulted in the redesign of the foundation and additional excavatio n
and shoring that impacted schedule during December.
The impact to the start-up schedule will be evaluated
next quarter. Subproject B: The potential risk of
delayed materials delivery due to the recent backlo g of container ships in the California ports will be
evaluated during the next few quarters.
12 Q2-FY2021-2022 (10/01/21 - 12/31/21)
10014087 - Warnerville Substation Rehabilitation
Project Description: This project is based on the need to extend the useful life of the Warnerville Substation and meet reliability requirements of NERC/W ECC and PG&E Intertie Agreements. The up grades include replacing three existing 3 phase transformer with two larger rated transformers. Other up grades include new 115kV and 230kV disconnect switches and breakers; new Control Room, perimeter fence, rela ys and controls; improvement to the grading and grounding system.
Project Status: ConstructionProgram: Power Infrastructure Environmental Status: Active Project Cost:
Forecast
Actual
$34.25 M
$21.88 M
Forecast
Sep-15 Nov-26
Sep-15 Nov-26
Project Schedule:
$34.25 M
Project Percent Complete: 67.3%
Approved Approved
Actual Cost; Forecast Approved;
Bid*
Advertisement
Construction*
Final Completion
Environmental*
ApprovalKey Milestones: Construction*
NTP
(A) 01/24/17Current Forecast (A) 03/31/22(A) 03/31/16 (A) 10/05/17 (B) 09/06/24 (B) 05/04/26(B) 02/03/25
* (A) Warnerville Substation Phase 1 – DB-127R; (B) Warnerville Substation Phase 2.
Typical 230KV SF6 Breaker to be Installed as Part of
Phase 2
Progress and Status:
The pro ject team, in coordination with the Cit y
Attorney’s office, is workin g to close out the contract DB-127R, Warnerville Substation Rehabilitation. The
project team is completin g the breaker failure
contingency plan for Contract documents to be
finalized next quarter. Contract HH-1008 Warnerville
Substation Rehabilitation Phase 2 will be a
design-bid-build contract. A task order for en
gineering
services durin g plannin g, desi gn and construction is being negotiated.
Issues and Challenges:
None at this time.
13 Hetch Hetchy Capital Improvement Program Quarterly Report 10035721 - Transmission Lines 7/8 Upgrades
Project Description: This pro ject develops the scope of work, desi gn, and contract documents necessar y to bid, award, and manage the recond uctoring contract. Reconductorin g will include replacement of the existin g 115kV conductors on Lines 7/8 from Warnerv ille to Standiford substations, resultin g in improved transmission tower stability, and resolved clearance detections.
The pro ject will be partiall y funded b y independent power generators interconnectin g on the California Independent System Operator (CAISO).
Project Status: DesignProgram: Power Infrastructure Environmental Status: Active Project Cost:
Forecast
Actual
$37.97 M
$2.71 M
Forecast
Dec-19 Jan-25
Dec-19 Jan-25
Project Schedule:
$37.97 M
Project Percent Complete: 10.7%
Approved Approved
Actual Cost; Forecast Approved;
Bid
Advertisement
Construction
Final Completion
Environmental
ApprovalKey Milestones: Construction
NTP
02/17/22Current Forecast 06/28/2411/04/21 10/03/22
Progress and Status:
Significant progress was achieved in the environmental
phase with the completion of an addendum to include
this pro ject work within the existin g Final Miti gated Negative Declaration for the Rehabilitation of the
Existing San Joaquin Pipelines, which contains the final historical, archeolo gical, and biolo gical evaluations completed last quarter. In addition, the desi gn
engineering consultant is on track to submit the 100%
design for next quarter. The specifications
development started this quarter for the constructio n
contract and will be final next quarter with the
anticipated advertisement of this contract for public
bid.
Issues and Challenges:
None at this time.
Transmission Line 7/8 Tower 508S Looking North
14 Q2-FY2021-2022 (10/01/21 - 12/31/21)
10014088 - Moccasin Penstock
Project Description: Moccasin Penstock was built in the early 1920's and convey s Hetch Hetchy water nearly one mile from Moccasin Tunnel to the Moccasin Powerh ouse. Moccasin penstock serves as the sole link in
conveying water from
Priest Reservoir to Moccasin Reservoir, from whi ch water is routed to the San Francisco Public Utilities Commission (SFPUC) customers. The lower 1,084-foot section of welded steel pipe replaced the original penst
ocks when the new Moccasin Powerhouse was completed in the 1960s. The upper 4,000 feet of penst
ock dates to 1924 and has been in service for more than 97 years. Previous condition assessments have identified deficiencies includin g corrosion, coatin g damage, linin g deg radation, leaka ge, a gg regate expansion, cracks in t
he concrete anchor blocks and saddles, vuln erability of the hammer forged steel pipe sections. The objective of this project is to enhance the reliability of water delivery and extend the life of the penstock sys tem for another 50 to 100 years.
Project Status: PlanningProgram: Joint Infrastructure Environmental Status: Active Project Cost:
Forecast
Actual
$47.25 M
$5.23 M
Forecast
Feb-16 Feb-28
Feb-16 Feb-28
Project Schedule:
$47.25 M
Project Percent Complete: 11.1%
Approved Approved
Actual Cost; Forecast Approved;
Bid
Advertisement
Construction
Final Completion
Environmental
ApprovalKey Milestones: Construction
NTP
10/07/24Current Forecast 08/24/2710/07/24 04/15/25
Moccasin Penstock along steep section
Progress and Status:
In this quarter, the condition assessment and the
structural evaluation reports were finalized. A
workshop with Hetch Hetch y Operations was held to
present findin gs durin g the Condition Assessmen t
phase. In addition, NTP was issued for the Needs
Assessment phase of the project. The Task Order
Kickoff meeting was held on December 14, 2021. The
field visit scheduled for December was postponed to
January due to adverse weather conditions.
Issues and Challenges:
None at this time.
15 Hetch Hetchy Capital Improvement Program Quarterly Report 10030758 - OSH Dam Access and Drainage Improvements
Project Description: The O’Shaughnessy Dam is located 140 miles east of San Francisco, CA in Yosemite National Park, Tuolumne County. The dam, a concrete curved gravity structure, is located on the Tuolumne River across the steep-walled Hetch Hetchy Valley. The interior workin gs of the dam contain valves and appurtenances that must be accessed for operations and maintenance.
This pro ject includes improvements for safe access, as well as miti gation of excess interior water leaka ge through draina ge improvements, for the Ladder We lls, Galleries, Inclined Stairwa ys, Control Room, and Diversion Tunnel.
The project was reduced in scope of work in 2020 to meet the existing approved budget. The new pro ject will be
advertised as O’Shaughnessy Dam-Fall Protection Improvements and Spillwa y Access to complete the reduced scope of work.
Improvements that were not included in this revised pro ject, such as draina ge improvements, will be included
in the OSH Dam Outlet Works Phase 1 project.
Project Status: ConstructionProgram: Joint Infrastructure Environmental Status: Completed (CatEx)
Project Cost:
Forecast
Actual
$3.95 M
$1.17 M
Forecast
Mar-17 Feb-23
Mar-17 Feb-23
Project Schedule:
$3.95 M
Project Percent Complete: 36.4%
Approved Approved
Actual Cost; Forecast Approved;
Bid
Advertisement
Construction
Final Completion
Environmental
ApprovalKey Milestones: Construction
NTP
03/18/21Current Forecast 08/21/2207/16/20 09/27/21
Progress and Status:
Notice to Proceed was established on September 27,
2021 for Contract HH-1002R. The contractor mobilized
to the worksite in November. Fall protection was
installed in the inclined stairwa
ys and on the drum
gate ladders. The exterior ladder to the spillwa y invert installation was in pro gress during the quarter but not yet completed.
Issues and Challenges:
None at this time.
Spillway Access Ladder with Fall Protection
16 Q2-FY2021-2022 (10/01/21 - 12/31/21)
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 serv ices for more than 98 years. Inspections, conditio n assessments, and studies concluded that improvements and refurbis hments of the outlet works s ystem are needed to ensure safety and reliability. The wo rk will be implemented in two phases. This pro ject is to cover the Phase 1 work. The O’Shaughnessy Dam Outlet Works Phase 1 Project addresses the identified deficiencies of the existing outlet works system at OSH. Phase 1 will include four projects: (1) suppl y and installation of nine new bulkheads; (2) refurbishment of twelve existi ng slide gates; (3) rehabilitation of existin g drum gates to replace the seals, replace the hinges and rivets, recoating the ga tes, and repair the spillway concrete; and (4) installation of a new diversion pipe isolation butterfly valve.
The existing control gates and valves are essential feat ures for dam safety and reservoir operation. The pro ject is needed to maintain safe and reliable operation of these aging assets. Failure or malfunction of these gates and valves will affect dam safet y and result in reduction of stora ge and reduction of water deliveries to SFPUC customers.
Project Status: PlanningProgram: Joint Infrastructure Environmental Status: Active Project Cost:
Forecast
Actual
$21.21 M
$1.06 M
Forecast
Feb-18 Sep-25
Feb-18 Sep-25
Project Schedule:
$47.89 M
Project Percent Complete: 15.1%
Approved Approved
Actual Cost; Forecast Approved;
Bid*
Advertisement
Construction*
Final Completion
Environmental*
ApprovalKey Milestones: Construction*
NTP
(A) 05/31/22
Current Forecast
(A) 03/14/25(A) 09/29/22 (A) 12/06/22
(B) 05/31/22 (B) 03/14/25(B) 09/29/22 (B) 12/06/22
(C) 04/14/23 (C) 11/29/24(C) 12/28/23 (C) 09/15/23
* (A) Bulkhead; (B) Access and Drainage; (C) Instream Flow Release Progress and Status:
Subproject A: Durin g this quarter, work be gan on a
peer review of the bulkhead design concept. The tea m
also scoped a JOC task order for divers to perform 1)
an underwater inspection of the bulkheads and 2) a
trial surface cleanin
g method to remove the rust on
sealing surfaces of the bulkhead at one of the existin g outlets. Subproject B: Work be gan on contractin g for a CCTV inspection of the drain s ystem in the
O’Shaughnessy Dam for the Access and Draina ge
Project. Subproject C: Preparation of the NAR/AAR
and of the plannin g phase environmental assessmen t
for the Instream Flow Release (IFR) Valve Replacement
Project continues. The current pro ject forecasted
budget and schedule include scope for installation of
new bulkheads (original scope), replacement of the IFR
valves, installation of safe access and draina
ge
improvements, and the plannin g phase for the drum
gates and slide gates refurbishment.
Issues and Challenges:
As noted last quarter, the current plannin g phase
design and construction cost and duration estimates
are higher than the approved budget and schedule due
to the following: 1) added scope of IFR valves
replacement and dam gallery access and draina ge
improvements; 2) scope refinement and greater detail
in the most recent construction cost estimate for the
new bulkhead system. The scope now specifies
additional inspections, underwater modification of the
existing slots and corroded inlet surfaces, and
installation of the bulkheads using divers. Completio n of the IFR valves replacement NAR/AAR is dela yed to
next quarter, but the delay can be recovered during the remaining plannin g and desi gn schedule withou t
impacts to the overall project completion date.
17 Hetch Hetchy Capital Improvement Program Quarterly Report 10037351 - Moccasin Dam Long-Term Improvements
Project Description: The flow capacit y of the existin g spillwa y is inadequate to protect the Moccasin Dam against overtopping and erosion from severe flood events. The dam almost overtopped during the March 2018 storm event when flows were released from the auxiliar y spillwa y and caused si gnificant dama ge to the auxiliary spillway. The surroundin g areas and the upstream diversion dam also sustained dama ge from the flood. This project is needed for dam safety. The ob jective of this project is to increase the spillwa y flow capacity to allow safe passa ge of flood flows without overtoppin g the dam and to protect the associated facilities within the Moccasin reservoir boundary against flood damages. The estimated project cost is $83.2 million and is within the current 10-year CIP FY 21-30. Construction is scheduled for 2025-2027.
Project Status: PlanningProgram: Joint Infrastructure Environmental Status: Not Initiated Project Cost:
Forecast
Actual
$83.18 M
$0.17 M
Forecast
May-21 Jul-27
May-21 Jun-28
Project Schedule:
$73.18 M
Project Percent Complete: 1.7%
Approved Approved
Actual Cost; Forecast Approved;
Bid
Advertisement
Construction
Final Completion
Environmental
ApprovalKey Milestones: Construction
NTP
01/26/26Current Forecast 12/30/2701/29/26 07/27/26
Existing Moccasin Dam Spillway
Progress and Status:
The alternatives analysis (AAR) was complete in
December 2021. The AAR confirmed that an auxiliar y
spillway is the preferred alternative for increasin g the spillway capacity. Additional detail was provided for
ancillary facilities. The en gineering consultant will
begin the conceptual en gineering phase in the nex t
quarter.
Issues and Challenges:
None at this time.
18 Q2-FY2021-2022 (10/01/21 - 12/31/21)
10014115 - Cherry Dam Spillway - Short Term Improvements Project Description: A spillway release from Cherry Dam in 2010 caused a landslide, blocka ge of the spill channel, and extensive erosion in the close proximity of the dam’s right abutment. In addition, it caused flooding of the Cherry Power Tunnel Adit, and fl ooding of a campground further downstream. En gineering studies determined that significant long-term improvements to increase the spillway flow capacity are needed to maintain dam safety. The objective of this project is to re-establish containment for the breached spill channel section and to protect the downstream slope of the existin g embankment dam from uncontrolled releases and erosion in the interim until the long-term improvemen ts are implemented. Construction is scheduled for 2025-2026. The estimated project cost of $11.9 million is within the current 10-year CIP FY 21-30.
Project Status: PlanningProgram: Joint Infrastructure Environmental Status: Not Initiated Project Cost:
Forecast
Actual
$11.86 M
$0.29 M
Forecast
Mar-21 Jul-27
Mar-21 Jul-27
Project Schedule:
$11.86 M
Project Percent Complete: 6.9%
Approved Approved
Actual Cost; Forecast Approved;
Bid
Advertisement
Construction
Final Completion
Environmental
ApprovalKey Milestones: Construction
NTP
03/29/24Current Forecast 12/31/2608/15/24 10/31/24
The Spillway Overflow Weir and Upstream Channel
Progress and Status:
The en gineering consultant continued work on the
alternative anal ysis for the Cherr y Dam Spillwa y
Short-Term Improvements. The alternatives will
include grading and erosion protection to contain the
spillway discharge. The alternatives anal ysis is
scheduled to complete in March 2022.
Issues and Challenges:
None at this time.
19 Hetch Hetchy Capital Improvement Program Quarterly Report 10014114 - Mountain Tunnel Improvement Project
Project Description: Mountain Tunnel conveys the SFPUC water supply from Kirkwood Powerhouse to Priest Reservoir. Mountain Tunnel has been in service since 1925. Due to its a ge, deferred maintenance, and construction deficiencies in the early 1900s, sections of the tunnel lining have deteriorated, some extensively.
This project provides desi gn and construction of ma jor tunnel repair and rehabilitation work, adit and tunnel entry improvements, access road improvements, and installation of a new flow control facilit y at Priest Reservoir to ensure that the tunnel can reliably provide drinking water to customers for the next 100 years.
The flow control structure and isolation valves will also be used to isolate the tunnel from Priest Reservoir during tunnel shutdowns. This will allow the reservoir to remain full and not backwater for over 8 miles into the dewatered tunnel. The full reservoir provides more suppl y water for safel y extending the tunnel shutdowns to longer durations of 100 days for construction inside the tunnel. These lon ger outages will reduce the need for more typical 60-day outages and shorten the overall duration of the construction schedule.
Project Status: ConstructionProgram: Joint Infrastructure Environmental Status: Completed Project Cost:
Forecast
Actual
$238.22 M
$54.60 M
Forecast
Oct-11 Jun-27
Oct-11 Jun-27
Project Schedule:
$238.22 M
Project Percent Complete: 32.1%
Approved Approved
Actual Cost; Forecast Approved;
Bid
Advertisement
Construction
Final Completion
Environmental
ApprovalKey Milestones: Construction
NTP
11/13/19Current Forecast 12/03/2601/14/20 01/29/21
FCF Shaft Collar Construction
Progress and Status:
This quarter's pro gress included completin g the
retaining wall and surface mass excavation to allow
construction of the Flow Control Facility (FCF) shaft.
The FCF shaft concrete collar was constructed, and the
shaft was excavated to a depth of thirty-five feet. The Priest Adit portal wall construction was substantiall y completed, and the adit construction has started. The
temporar
y water treatment plant below Pries t
Reservoir to treat construction water was substantiall y completed alon g with the temporar y water treatment
plant to provide drinking water to Moccasin during the
five Mountain Tunnel shutdowns planned for this
project. Safet y improvement work continued on the
adit access roads. Work continues on the bulkhead
door at Early Intake. Si gnificant plannin g and
preparation took place for the first of the planned
Mountain Tunnel shutdowns that starts in Januar
y
2022.
Issues and Challenges:
None at this time.
20 Q2-FY2021-2022 (10/01/21 - 12/31/21)
10035086 - Bridge Replacement (4 - Bridges)
Project Description: HHWP is responsible for maintaining 14 brid ges located in the Cherr y, Eleanor, and Hetch Hetchy region. Condition assessments in 2013 and 2016 determined that, four of these brid ges require substantial rehabilitation or replacement: Lake Eleanor Dam Brid ge, O'Shaughnessy Adit Access Bridge, Cherry Lake Road Bridge (public access), and Early Intake Bridge (public access). The project will be funded in 2 phases.
The first phase will include planning, design and construction of Eleanor Dam Bridge and O’Shaughnessy Adit Access Bridge. The plannin g, design and construction of the Earl y Intake Brid ge and Cherr y Lake Road Brid ge will be under Phase 2.
Project Status: PlanningProgram: Joint Infrastructure Environmental Status: Not Initiated Project Cost:
Forecast
Actual
$44.29 M
$1.22 M
Forecast
Feb-20 Ma y-37
Feb-20 Jul-27
Project Schedule:
$29.37 M
Project Percent Complete: 44.8%
Approved Approved
Actual Cost; Forecast Approved;
Bid*
Advertisement
Construction*
Final Completion
Environmental*
ApprovalKey Milestones: Construction*
NTP
(A) 08/01/23Current Forecast (A) 12/31/25(A) 06/30/23 (A) 02/01/24 (B) 08/01/24 (B) 01/29/27(B) 02/03/25
* (A) Lake Eleanor Dam Bridge; and (B) O’Shaughnessy Adit Access Bridge.
O’Shaughnessy Adit Bridge and Geotechnical Exploration
Progress and Status:
For the O’Shau ghnessy Adit Access Brid ge, a
geotechnical data report ha s been finalized and the
draft Alternatives Technical Memorandum is bein g
developed. For Lake Eleanor Dam Brid ge, the
engineering consultant started workin g on a
constructability review in conjunction with preliminary alternatives for rehabilitation of the existing bridge.
Issues and Challenges:
The variances between the approved bud get and
schedule and the forecasted bud get and schedule are
due to division of the pro ject into two phases, with the planning, design and construction of the Lake Eleanor
Dam Bridge and O’Shau ghnessy Adit Access Brid ge
within the first phase and funded in the FY21-30
10-Year CIP; the fundin g for the plannin g, design and construction of the other two of the four brid ges has
been deferred until after 2030. The forecasted
completion for the two brid
ges is decreased from the
approved completion date of May 2037 to a revised
completion date of January 2027. 21
(B) 07/31/24
Q2-FY2021-2022 (10/01/21 - 12/31/21) Hetch Hetchy Capital Improvement Program Quarterly Report
8. On-Going Construction*
The following table reflects active construction contract(s) with an original contract amount greater than $1M.
Actual
%
Complete
Current
Forecast
Cost
Schedule
(Cal. Days)
NTP
Date
Approved
Construction
Final
Completion
Variance
(Original - Forecast)BudgetSchedule
Construction Contract Current
Forecast
Cost*
Current
Forecast
Construction
Final
Completion*
Approved
Contract
Cost
Power Infrastructure
$ 3,653,575$ 3,653,57505/23/2305/23/2306/07/21
10014086 - Moccasin Powerhouse
Transformers Installation - HH-1003R - - 16.9%
$ 28,898,986$ 28,898,98606/17/2406/17/2406/21/21
10014086 - Moccasin Powerhouse
Generator Rehab - DB-121R2
- -3 . 2 %
$ 14,591,450$ 14,591,45003/31/2207/09/1910/05/17
10014087 - Warnerville Switchyard -
DB-127R **
(996) - 90.0%
Joint Infrastructure
$ 1,648,556$ 1,648,55608/21/2208/21/2209/27/21
10030758 - OSH Dam Access &
Drainage Improvement - HH-1002R
- - 13.6%
$ 152,870,508$ 152,870,50812/03/2612/03/2601/29/21
10014114 - Mountain Tunnel
Improvement - HH-1000R
- - 10.3%
Program Total
for On-Going
Construction $ 201,663,075 $ 201,663,075
Current Forecast
Cost*
Approved
Contract Cost
Variance
$- - %
Cost Percent
Note:
* The Current Forecast Cost and Current Forecast Construction Final Completion include all approved, pending, and potential change orders.
** The contract is funded with both CIP and non-CIP funds, but only the CIP funded amount is reflected. 22 9. PROJECTS IN CLOSE-OUT
Q2-FY2021-2022 (10/01/21 - 12/31/21)
Current
Approved
Construction
Phase
Budget
Actual
Construction
Phase
Completion
Current
Approved
Construction
Phase
Completion
Construction
Phase
Expenditures
To Date*
Project Title
Power Infrastructure
Powerhouse
10014075 - Holm and Other Powerhouse Projects 05/14/21 05/14/21 $ 15,327,522 $ 12,869,291 $ 15,327,522TOTAL $ 12,869,291
23 24
Hetch Hetchy Capital Improvement Program Quarterly Report
10. COMPLETED PROJECTS
There are no completed projects
Appendices Q2-FY2021-2022 (10/01/21 - 12/31/21)
APPENDICES
A PROJECT DESCRIPTIONS
B APPROVED PROJECT LEVEL SCHEDULES / BUDGETS
C LIST OF ACRONYMS
Appendices
This page is intentionally left blank.
Q2-FY2021-2022 (10/01/21 - 12/31/21)
APPENDIX A. PROJECT DESCRIPTIONS
The project titles and descriptions are updated
according to the approved 10- year CIP for
FY21-30.
HETCH HETCHY CAPITAL
IMPROVEMENT PROGRAM (HCIP)
WATER INFRASTRUCTURE
10035574 - SJPL Tesla Valves Replacement
The 2018 approved scope for this pro ject is to
replace four lar ge diameter butterfl y valves,
namely TUV 101, 201, 301 and 401, inside the
Tesla Valve Vault so that each of the four San
Joaquin Pipelines (SJPL) can be safel y isolated
and shut down individually for inspection and
repair work without shuttin g down the entire
SJPL system. This pro ject will also improve
safety for entr y into the pipelines for
maintenance and inspection purposes. After
the planning phase of the related pro ject SJPL
Valve and Safe Entry Improvement (Pro ject
10035575) it was recommended that the scope
of SJPL Tesla Valve Replacement be reduced,
to focus on completin g the replacement o f
TUV101 only. The remainder of the work (i.e.
TUV 201, 301 and 401) has been added to the
scope of SJPL Valve and Safe Entr y
Improvement (Project 10035575) to expedite
improvements for TUV101 during the planned
winter shutdown from Januar y to Februar y
2022 to facilitate necessar y maintenance work
for SJPL No. 1 during the remainder of 2022.
The installation of TUV201, 301 and 401 will
proceed to gether with the up grade work
proposed under SJPL Valve and Safe Entr y
Improvement, in 2023 and 2024.
10035575 - SJPL Valve and Safe Entry
Improvement
The San Joaquin Pipelines (SJPLs) consist o f
three parallel pipelines approximately 48
miles long (completed in 1932, 1953, and 1968,
respectively) that cross the San Joaquin Valle y
from the Oakdale Portal of the Foothill Tunnel
on the east end to the Tesla Portal of the Coast
Range Tunnel (CRT) on the west. Portions of a
fourth pipeline have also been constructed
consisting of 6.4 miles of pipe downstream o f
Oakdale and 11 miles upstream of Tesla. The
hydraulic gradient on the SJPLs was limited
by surge stacks/towers at Oakdale portal
(~825 ft) and Tesla portal (~500 ft). The
pipelines were intended to be shut down at
Oakdale.
As part of the SFPUC’s Water S
ystem
Improvement Program (WSIP), the Emer y and
Pelican crossover vaults were installed and the
Roselle crossover vault was modified to allow
for flows between SJPLs and isolation of SJPL
segments for inspection and maintenance. The
intent was to increase operational flexibilit y
and the overall reliability of the SJPL System.
In addition, the Tesla Valve House (TVH) and
Tesla Treatment Facility (TTF) were added
upstream of the Tesla surge tower. Like the
SJPLs, the crossover vaults and Tesla facilities
are rated for the maximum pressures that
should occur under normal operatin
g
conditions. However, the pipelines and
pipeline se gments still need to be shut down
from the upstream end. Closure of multiple
in-line valves or all TTF UV reactor valves can
over-pressurize the pipelines. As in the
original desi gn, complete shutdown of the
SJPL system must be done at Oakdale.
The ob
jective of this pro ject is to allow safe
entry into any and all sections of the SJPLs for
inspection and maintenance while the
remainder of the system stays in operation.
The pro ject ob jective is not to up grade the
entire SJPL s ystem to the maximum possible
static or transient pressures, nor to up grade all
components in vaults to prevent possible
flooding of the vaults. However, the proposed
surge tower will protect the entire SJPL system
from high static and transient pressure caused
by operation of valves at Tesla Treatment
Facility. The scope and budget of installing the
TUV201, 301 and 401 butterfly valves has been
transferred from pro ject SJPL Tesla Valve
A1
Appendices
Replacement project (10035574) and added to
SJPL Valve and Safe Entry Improvement.
10014072 – WATER ONLY/PROJECT
DEVELOPMENT
The Project Development (PD) Account
captures Program level expenditures. There
are four types of charges that will be allocated
to the PD Account: 1) char ges for task orders
for overall pro gram mana gement and pro ject
prioritization tasks, where the costs should be
distributed over all Capital Improvement
Program (CIP) Projects; 2) char ges for
Infrastructure and Hetch y staff performin g
program level tasks including: capital plan
development, budget management (includin
g
fund management, and cost reallocations),
and quarterl y report generation tasks, where
the costs should be distributed over all CIP
Projects; 3) char
ges for portal support for the
existing SharePoint Po rtal (includes document
management and pro ject dashboard
reporting); and 4) char ges for work outreach
programs.
POWER INFRASTRUCTURE
10036809 - Moccasin Powerhouse Bypass
Upgrades
Hetch Hetch
y water deliveries are conve yed
from Priest Reservoir to Moccasin Powerhouse
(MPH) through the Moccasin Penstocks. At
MPH, water passes throu gh two h ydroelectric
turbines where ener gy is converted from
high-pressure water into electricity. When
electricity is not bein g produced, the water
deliveries are directed around the turbines b y
two bypass valves that dissipate up to 305
million gallons per day (mgd) at 560 pounds
per square inch (psi) of water energy. In the
past, short-term use of the b ypass system has
resulted in significant vibration and cavitation
damage to the bypass valves. Long-term use
(greater than two to five days) could lead to
major mechanical dama ge or failure, leadin g
in turn to the potential of interruption of water
deliveries to San Francisco. This pro ject will
provide a reliable h ydraulic b ypass and
energy dissipation system for conveying water
around the turbines to the Moccasin Reservoir
B
ypass Pipeline, allowin g for increased
operating flexibilit y for HHWP to meet
scheduled water deliveries even when MPH,
Moccasin Switch yard, or power Transmission
Lines #3 and #4 are curtailed.
10036810 - Kirkwood Powerhouse Bypass
Upgrades
Hetch Hetch y water deliveries are conve yed
through the Can yon Tunnel to the Can yon
Portal Valvehouse. Water then enters the
Kirkwood Penstock and drops 1,245 feet in
elevation to the Kirkwood Powerhouse (KPH).
At KPH, water passes throu gh three
hydroelectric turbines where ener gy is
converted from high-pressure water into
electricity, producin g a maximum output o f
124 megawatts at a maximum flow of 1,408
cubic feet per second. When electricit y is not
being produced, the water deliveries are
directed around the turbines throu gh a
separate b ypass s ystem consistin g of a
spherical guard valve and a 90-de gree needle
valve for flow control. Based on a condition
assessment of KPH performed in 2010,
existing control problems limit operation o f
the bypass needle valve to no more than 70%
open. An inspection of the b ypass valve and
dissipation structure in 2016 indicated that the
stainless steel dissipator had failed, causin g
damage at the base of a steel shaft column
leading to the bypass tunnel. Repairs to the
dissipator, b ypass draft tube, and b ypass
chamber were completed in 2017, but the steel
lining protecting the bypass chamber’s
concrete walls and floor subsequentl y failed
after bypass usage. Additional repairs were
made to the steel lining of the bypass in 2019
under the HH-991 2018 Mountain Tunnel
Interim Repairs construction contract.
Long-term use (greater than two to five days)
could lead to ma jor mechanical dama ge or
A2
Q2-FY2021-2022 (10/01/21 - 12/31/21)
failure, leadin g to potential interruption o f
water deliveries to San Francisco. This pro ject
will provide a reliable h ydraulic b ypass and
energy dissipation system for conveying water
around the turbines to the KPH B ypass
Chamber and Mountain Tunnel, allowin g for
increased operatin g flexibilit y for Hetch
Hetchy Water & Power (HHWP) to meet
scheduled water deliveries when KPH is not
generating electricity.
10014075 - Holm and Other Powerhouse
Projects
This pro ject provided fundin g for Holm
Powerhouse (HPH) Unit 2 upgrades and other
items under $1 million involvin g power
generation renewal and equipment
replacement. The up grade and rehabilitation
of HPH Unit 2 included 13.8 Kv equipment
upgrades, addition and inte gration of a
generator breaker, replacement of two 13.8kV
feed breakers, replacement of Unit 2 Main
Control Board, and an
y necessar y tasks to
match Unit 2 to Unit 1. S ystem inte gration
work was done to inte grate exciter, governor
Programmable Logic Controllers (PLC), and
Generator 2 PLCs into the existin
g plant
control and Supervisor y Control and Data
Acquisition (SCADA) system. Additionall y,
this project included up grades to turbine and
generators and to alternatin g current stations,
intended to extend the life of the unit by 20
years. Lastly, the project upgraded the existing
oil containment s ystems at Kirkwood
Powerhouse (KPH) and HPH to prevent oil
discharge into the environment. The existin g
oil-water separators were replaced, and other
modifications were made to the powerhouse
interiors and to the transformer decks, to
discoura
ge contaminated dischar ges into the
adjacent streams. A monitorin g s ystem was
installed to alert HHWP of excessive leaka ge
and the need to manuall y pump oil
containment vessels. Failure of the oil
containment s
ystems at the powerhouses
would likel y result in environmental
contamination, fines, additional re gulatory
exposure, and the need for rehabilitation and
cleanup.
10014086 - Moccasin Powerhouse and GSU
Rehabilitation
The two Moccasin Powerhouse
generators
were completed in 1969 and generate a
combined maximum output of 110 megawatts.
Both generator units have exceeded their life
expectancy and are in need of repair in order
to continue operating reliably. The ob jective of
this project is to replace stator cores and coils.
The scope of work also includes rehabilitation
of the rotor field poles with new pole cores
and re-insulated field coils, replacement of the
rotor pole/rim tail connection s
ystem with a
new T-tail connection s ystem, and suppl y of a
new rotor rim for each generator followin g
inspection and testing. The pro ject will also
include replacement of two generator step-up
transformers (GSUs) with new oil containment
barriers, and remaining plant work including:
replacing 480V switchgear, 13.8kV switch gear,
motor control centers, main control boards,
protective relays, and cooling water piping.
10014087 - Warnerville Substation
Rehabilitation
This pro
ject is needed to extend the useful life
of the Warnerville Substation and meet
reliability requirements of NERC/WECC and
PG&E Intertie Agreements. The up grades
include replacing three existing 3 phase
transformer with two lar ger rated
transformers. Other up grades include new
115kV and 230kV disconnect switches and
breakers; new Control Room, perimeter fence,
rela
ys and controls; improvement to the
grading and grounding system.
10035721 - Transmission Lines 7/8 Upgrades
The SFPUC electric transmission lines 7/8
conveys power from Warnerville Substation to
Modesto Irrigation District’s (MID) Standiford
Substation. The SFPUC must accommodate
A3
Appendices
additional power flowin g across its
transmission s ystem due to grid
interconnection requests from independent
power generators interconnectin g on the
California Independent S ystem Operator
(CAISO). This is a requirement for SFPUC and
HHWP obli
gations as a nei ghboring provider
of electric transmission service.
Studies performed b
y the SFPUC indicate the
principal impact to its system is an overload of
115kV Lines 7&8 between HHWP Warnerville
Substation and MID Standiford Substation
under contin
genc y conditions i f
interconnections are made without
modification to the system’s capacity. Without
modifications, the SFPUC and HHWP
transmission s
ystem could face reliabilit y
issues. Reconductorin g also resolves multiple
locations where the clearance between the
existing conductors and the ground or
structures does not meet current safe clearance
regulations.
This pro
ject develops the scope of work,
design, and contract documents necessar y to
bid, award, and mana ge the reconductorin g
contract. Reconductorin g will include
replacement of the existing 115kV conductors
on Lines 7/8 from Warnerville to Standiford
substations, resultin g in improved
transmission tower stabilit y, and resolved
clearance detections.
The pro ject will be partiall y funded b y
independent power g enerators
interconnecting on the California Independent
System Operator (CAISO).
10014092 - POWER ONLY/PROJECT
DEVELOPMENT
The Project Development (PD) Account
captures Program level expenditures. There
are four types of charges that will be allocated
to the PD Account: 1) char ges for task orders
for overall pro gram mana gement and pro ject
prioritization tasks, where the costs should be
distributed over all Capital Improvement
Program (CIP) Projects; 2) char
ges for
Infrastructure and Hetch y staff performin g
program level tasks including: capital plan
development, budget management (includin g
fund management, and cost reallocations),
and quarterl y report generation tasks, where
the costs should be distributed over all CIP
Projects; 3) char
ges for portal support for the
existing SharePoint Po rtal (includes document
management and pro ject dashboard
reporting); and 4) char ges for work outreach
programs.
JOINT INFRASTRUCTURE
10014088 - Moccasin Penstock
Moccasin Penstock was built in the earl y
1920's and conveys Hetch Hetchy water nearly
one mile from Moccasin Tunnel to the
Moccasin Powerhouse. Moccasin penstock
serves as the sole link in conveying water from
Priest Reservoir to Moccasin Reservoir, from
which water is routed to the San Francisco
Public Utilities Commission (SFPUC)
customers. The lower 1,084-foot section of
welded steel pipe replaced the ori ginal
penstocks when the new Moccasin
Powerhouse was completed in the 1960s. The
upper 4,000 feet of penstock dates to 1924 and
has been in service for more than 97 years.
Previous condition assessments have
identified deficiencies includin
g corrosion,
coating dama ge, linin g de gradation, leaka ge,
aggregate expansion, cracks in the concrete
anchor blocks and saddles, vulnerability of the
hammer forged steel pipe sections. The
objective of this pro ject is to enhance the
reliability of water delivery and extend the life
of the penstock system for another 50 to 100
years.
10030758 – OSH Dam Access and Draina
ge
Improvements
The O’Shaughnessy Dam is located 140 miles
east of San Francisco, CA in Yosemite National
Park, Tuolumne County. The dam, a concrete
curved gravity structure, is located on the
A4
Q2-FY2021-2022 (10/01/21 - 12/31/21)
Tuolumne River across the steep walled Hetch
Hetchy Valley. The interior workin gs of the
dam contain valves and appurtenances that
must be accessed for operations and
maintenance. This pro
ject includes
improvements for safe access, as well as
miti
gation of excess interior water leaka ge
through draina ge improvements, for the
Ladder Wells, Galleries, Inclined Stairwa ys,
Control Room, and Diversion Tunnel. The
project was reduced in scope of work in 2020
to meet the existing approved budget. The
new pro
ject will be advertised as
O’Shaughnessy Dam-Fall Protection
Improvements and Spillwa y Access to
complete the reduced scope of work.
Improvements that were not included in this
revised pro
ject, such as draina ge
improvements, will be included in the OSH
Dam Outlet Works Phase 1 project.
10032903 – O’Shau ghnessy Dam Outlet
Works Phase 1
O'Shaughnessy Dam (OSH) was completed in
1923 and raised in 1938. The ori ginal 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 s
ystem are needed to ensure
safety and reliability. The work will be
implemented in two phases. This pro ject is to
cover the Phase 1 work. The O’Shau ghnessy
Dam Outlet Works Phase 1 Pro ject addresses
the identified deficiencies of the existing outlet
works system at OSH. Phase 1 will include
four projects: (1) suppl y and installation o f
nine new bulkheads; (2) refurbishment of
twelve existing slide gates; (3) rehabilitation of
existing drum gates to replace the seals,
replace the hin ges and rivets, recoatin g the
gates, and repair the spillway concrete; and (4)
installation of a new diversion pipe isolation
butterfly valve. The existin
g control gates and
valves are essential features for dam safet y
and reservoir operation. The pro ject is needed
to maintain safe and reliable operation o f
these aging assets. Failure or malfunction of
these gates and valves will affect dam safet y
and result in reduction of stora ge and
reduction of water deliveries to SFPUC
customers.
10037351 – Moccasin Dam Long-Term
Improvements
The flow capacit y of the existin g spillwa y is
inadequate to protect the Moccasin Dam
a
gainst overtoppin g and erosion from severe
flood events. The dam almost overtopped
during the March 2018 storm event when
flows were released from the auxiliar y
spillway and caused si gnificant damage to the
auxiliary spillway. The surroundin g areas and
the upstream diversion dam also sustained
damage from the flood. This pro ject is needed
for dam safety. The ob jective of this pro ject is
to increase the spillwa y flow capacity to allow
safe passa ge of flood flows without
overtopping the dam and to protect the
associated facilities within the Moccasin
reservoir boundary against flood damages.
The estimated project cost is $83.2 million and
is within the current 10-year CIP FY 21-30.
Construction is scheduled for 2025-2027.
10014115 – Cherry Dam Spillway - Short
Term Improvements
A spillway release from Cherry Dam in 2010
caused a landslide, blocka ge of the spill
channel, and extensive erosion in the close
proximity of the dam’s right abutment. In
addition, it caused floodin g of the Cherr y
Power Tunnel Adit, and floodin g of a
campground further downstream.
Engineering studies determined that
significant long-term improvements to
increase the spillway flow capacity are needed
to maintain dam safety. The ob jective of this
project is to re-establish containment for the
breached spill channel section and to protect
the downstream slope of the existin
g
embankment dam from uncontrolled releases
A5
Appendices
and erosion in the interim until the long-term
improvements are implemented. Construction
is scheduled for 2025-2026. The estimated
project cost of $11.9 million is within the
current 10-year CIP FY 21-30.
10014114 – Mountain Tunnel Improvement
Project
Mountain Tunnel conve ys the SFPUC water
supply from Kirkwood Powerhouse to Priest
Reservoir. Mountain Tunnel has been in
service since 1925. Due to its a ge, deferred
maintenance, and construction deficiencies in
the early 1900s, sections of the tunnel linin g
have deteriorated, some extensively. This
pro
ject provides desi gn and construction o f
major tunnel repair and rehabilitation work,
adit and tunnel entr y improvements, access
road improvements, and installation of a new
flow control facilit
y at Priest Reservoir to
ensure that the tunnel can reliabl y provide
drinking water to customers for the next 100
years. The flow control structure and isolation
valves will also be used to isolate the tunnel
from Priest Reservoir durin
g tunnel
shutdowns. This will allow the reservoir to
remain full and not backwater for over 8 miles
into the dewatered tunnel. The full reservoir
provides more suppl
y water for safel y
extending the tunnel shutdowns to lon ger
durations of 100 da ys for construction inside
the tunnel. These lon ger outa ges will reduce
the need for more typical 60-da y outages and
shorten the overall duration of the
construction schedule.
10035086 – Bridge Replacement (4 Bridges)
HHWP is responsible for maintaining 14
bridges located in the Cherr y, Eleanor, and
Hetch Hetchy region. Condition assessments
in 2013 and 2016 determined that, four o f
these bridges require substantial rehabilitation
or replacement: Lake Eleanor Dam Brid ge,
O'Shaughnessy Adit Access Brid ge, Cherr y
Lake Road Bridge (public access), and Earl y
Intake Bridge (public access). The pro ject will
be funded in 2 phases. The first phase will
include plannin g, desi gn and construction o f
Eleanor Dam Bridge and O’Shaughnessy Adit
Access Brid ge as well as the plannin g and
design of the other two bridges. The
construction of the Earl y Intake Brid ge and
Cherry Lake Road Brid ge will be under Phase
2. 10014108 – Canyon Tunnel Rehabilitation
Canyon Tunnel was built over 45 years ago. A
condition assessment was performed on the
tunnel in 2009 and the tunnel is in generally
good condition, with the exception of the
Hetchy Adit, a tunnel access point. Temporar y
repairs have been made to the plu g at this adit
twice (once in 1989 and once in 2009), but
permanent repairs are needed to reduce
leakage and increase reliability of the system.
The pro ject scope includes installation of a
new reinforced concrete plu g downstream o f
the existing plug.
10014110 – Moccasin Wastewater Treatmen t
Plant
The Moccasin Wastewater Treatment Plant
(WWTP) pro ject proposes to replace the
community’s aging treatment plant.
Moccasin’s treatment plant was installed in
the 1970s and has been in continuous service
since that time. Wastewater
generated b y the
Moccasin communit y, powerhouse, and
related facilities flows to this treatment plant.
The treatment facilit y currentl y servin g
Moccasin was a “package plant” that was
manufactured off-site, transported to
Moccasin, and installed in 1977. At more than
44-years old, the Moccasin treatment plant has
reached the end of its useful service life, and is
becoming increasingly maintenance intensive.
Additionall
y, Moccasin has no backup
treatment; accordin gly, failure of the plant
would have significant consequences.
This pro ject will replace the existin g
wastewater treatment facilities with a
Sequence Batch Reactor (SBR) plant. The
A6
Q2-FY2021-2022 (10/01/21 - 12/31/21)
proposed SBR “package plant” is to be a
two-train facility. Each train would have a
capacity of 12,000 gallons per da y to
accommodate average daily dry-weather flow.
The new plant would continue to treat
wastewater to secondary standards. The new
plant will be provided with up
graded
screening, flow monitorin g, flow equalization,
SCADA instrumentation, and automation
features. The packa
ge plant would be
manufactured off-site, trucked to Moccasin,
and then installed beside the current plant.
The existin g plant must serve the Moccasin
community while the new plant is bein g
installed and would remain in operation
during construction. The proposed pro
ject is
limited to the treatment plant onl y and does
not include improvements either upstream or
downstream of the plant.
10014116 – JOINT - PROJECT
DEVELOPMENT
The Project Development (PD) Account
captures Program level expenditures. There
are four types of charges that will be allocated
to the PD Account: 1) char ges for task orders
for overall pro gram mana gement and pro ject
prioritization tasks, where the costs should be
distributed over all Capital Improvement
Program (CIP) Projects; 2) char ges for
Infrastructure and Hetch y staff performin g
program level tasks including: capital plan
development, budget management (includin g
fund management, and cost reallocations),
and quarterl y report generation tasks, where
the costs should be distributed over all CIP
Projects; 3) char
ges for portal support for the
existing SharePoint Po rtal (includes document
management and pro ject dashboard
reporting); and 4) char ges for work outreach
programs.
A7
A8
Appendices
This page is intentionally left blank.
Project Name Approved Budget Start Finish
Hetchy Capital Improvement Projects $807,296,327.49 03-Oct-11 25-May-37 Water Infrastructure $109,533,203.01 26-Mar-12 30-Jun-31 10035574 SJPL Tesla V alves Replacement $3,740,000.00 01-May-19 30-Dec-22 10035575 SJPL V alve and Safe Entry Improvement $98,924,000.00 01-Jul-19 13-Mar-28 10014072 WA TER ONLY/PROJ DEV $6,869,203.00 26-Mar-12 30-Jun-31 Power Infrastructure $204,242,684.48 29-May-12 30-Jun-31 10014075 Holm and Other Powerhouse Projects $23,061,080.48 03-Sep-13 30-Dec-21 10014086 Moccasin Powerhouse and GSU Rehabilitation $66,713,635.00 04-Jan-16 13-Apr-27 10036809 Moccasin Powerhouse Bypass Upgrades $15,007,000.00 18-Sep-20 01-Dec-27 10036810 Kirkwood Powerhouse Bypass Upgrades $16,157,000.00 01-Jul-20 23-Oct-30 10014087 Warnerville Substation Rehabilitation $34,248,428.00 01-Sep-15 25-Nov-26 10035721 Transmission Lines 7/8 Upgrades $37,969,000.00 02-Dec-19 31-Jan-25 10014092 POWER ONLY/PROJ DEVELP $11,086,541.00 29-May-12 30-Jun-31 Joint Infrastructure $493,520,440.00 03-Oct-11 25-May-37 10014088 Moccasin Penstock $47,251,363.00 01-Feb-16 28-Feb-28 10014110 Moccasin Wastewater Treatment Plant $8,794,549.00 01-Sep-21 07-Apr-26 10032903 O'Shaughnessy Dam Outlet Works Phase I $21,206,000.00 01-Feb-18 16-Sep-25 10014108 Canyon Tunnel Rehabilitation $8,428,813.00 03-Feb-14 13-Jan-25 10014114 Mountain Tunnel Improvement Project $238,218,951.00 03-Oct-11 03-Jun-27 10030758 OSH Dam Access and Drainage Improvements $3,952,211.00 01-Mar-17 28-Feb-23 10037351 Moccasin Dam Long-Term Improvements $83,175,822.00 03-May-21 30-Jun-28 10014115 Cherry Dam Spillway - Short Term Improvements $11,860,965.00 01-Mar-21 01-Jul-27 10035086 Bridge Replacement (4 - Bridges) $44,287,000.00 27-Feb-20 25-May-37 10014116 JOINT - PROJECT DEVELOPMENT $26,344,766.00 25-Jun-12 30-Jun-31
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 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 012 FY2013 FY2014 FY2015 FY2016 FY2017 FY2018 FY2019 FY2020 FY2021 FY2022 FY2023 FY2024 FY2025 FY2026 FY2027 FY2028 FY2029 FY2030 APPENDIX B. Hetch Hetchy Improvement Projects Approved Project Level Schedules/Budgets Q2-FY2021-2022 (10/01/21 - 12/31/21) B1
Q2-FY2021-2022 (10/01/21 - 12/31/21)
APPENDIX C. LIST OF ACRONYMS
AAR Alternative Analysis Report
BOS Board of Supervisors
CAISO California Independent System
Operator
CATEX Categorical Exemption
CEQA California Environmental Quality Act
CER Conceptual Engineering Report
CIP Capital Improvement Program
COVID-
19 Coronavirus Disease of 2019
CRT Coast Range Tunnel
DB Design, Build
DCR Design Criteria Report
FCF Flow Control Facility
FY Fiscal Year
GDR Geotechnical Data Report
GSU Generator Step-Up
GWH Gigawatt Hours
HCIP Hetch Hetchy Capital Improvement
Program
HH Hetch Hetchy
HHWP
HPH
IFR
JOC
KPH
MGD
MID
MPH
NAR
NERC
NTP
OSH
PD
PG&E
PLC
PSI
R&R
SBR
Hetch Hetchy Water and Power
Holm Powerhouse
Instream
Flow Release
Job Order Contract
Kirkwood Powerhouse
Million Gallons per Day
Modesto Irrigation District
Moccasin Powerhouse
Needs Assessment Report
North American Electric Reliability
Corporation
Noti
ce to Proceed
O'Shaughnessy Dam
Project Development
Pacific Gas and Electric Company
Programmable Logic Controllers
Per Square Inch
Renewal and Replacement
Sequence Ba
tch Reactor
SCADA Supervisory Control and Data
Acquisition
SFPUC San Francisco Public Utilities
Commission
SJPL San Joaquin Pipeline
TSC Technical Steering Committee
TTF Tesla Treatment Facility
TUV Tesla Ultra Violet
TVH Tesla Valve House
WSIP Water System Improvement Program
WWTP Wastewater Treatment Plant
C1