SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. 1 WW-662R Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades
March 11, 2025 Roland Sun/Calvin Huey
Project Manger
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. 2 To increase reliability, redundancy and capacity of the Southeast Water Pollution Control Plant (SEP)
electrical system with dual utility power feeds, one from PG&E’s Hunters Point switchyard and other from
SFPUC Hetch Hetchy electrical feed from Potrero
switchyard.
Note: SFPUC Hetch Hetchy power feed from the Bay Corridor Transmission Distribution (BCTD) switchyard will be the primary feed to SEP.
Objective of Project
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. 3 Project Area - Aerial View
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. 4 New Primary Switching Station –
Building 032
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. 5 New Switching Station
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. 6 Typical Unit Substation – Cut-over Work
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. • Increasing contract duration by 485 calendar days
• Increasing contract amount by $2,714,535
• Differing Site Condition $1,316,458
• Design Clarification $198,077
• Delay Cost $1,200,000
7 Modification Nos. 1 to 45
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. • Construction 84% completion
• Remaining Work
• Completing the substations working within shutdown
constraints
• Constructing the service protection equipment per PG&E requirements
• Testing, start-up and commissioning of the work
8 Current Status & Remaining Work
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean.
Approve an increase of 283 calendar days to the
duration contingency for Contract No. WW-662R,
Southeast Water Pollution Control Plant Power Feed and
Primary Switchgear Upgrades, with Blocka Construction,
Inc., for a revised duration limit of 1,938 consecutive calendar days, with no change to the contract amount.
9 For Commission Approval
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean.
QUESTIONS
DEPARTMENT
Infrastructure Division
AGENDA NO. 10
MEETING DATE
March 11, 2025
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Regular Calendar
Contract Manager: Roland Sun
Approve Increase to Duration Contingency for Contract No. WW-662R, Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades
Summary of Proposed
Commission Action:
Approve an increase of 283 calendar days to the duration contingency for Contract No. WW -662R, Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades, with Blocka Construction, Inc., for a revised duration limit of 1,938 consecutive calendar days (approximately five years and four months), with no change to the contract amount , due to differing site conditions, design clarifications, delays in delivery of Hetch Hetchy Power to the Southeast Water Pollution Control Plant, operational constraints in the substation cut-over sequence, and construction of additional service protection equipment per Pacific Gas and Electric Company requirements.
Background: The San Francisco Public Utilities Commission (SFPUC) is addressing t he existing primary switchgear and majority of substations at the Southeast Water Pollution Control Plant (SEP) that have reached the end of their useful service life. The objective of the project is to increase reliability, redundancy, and capacity of the electrical system for SEP facilities and nearby pump stations.
On July 28, 2020, by Resolution No. 20- 0163, the Commission awarded Contract No. WW -662R, Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades , to Blocka Construction, Inc . The original contract amount was $30,744,200, and the original contract duration was 1,170 consecutive calendar days.
On March 14, 2023, by Resolution No. 23- 0055, the Commission approved an increase of $2,000,000 to the existing cost contingency and an increase of 368 calendar days to the existing duration contingency, for a total cost
contingency amount of $5,074,420 and a total duration contingency of 485 calendar days, and for a total cost limit of $35,818,620 and a total duration limit of 1,655 consecutive calendar days.
During construction, the contractor encountered unforeseen site issues, including delayed delivery of SFPUC power to SEP. Additionally, SFPUC staff anticipates the contractor will require additional time to install the substations due to operational constraints in the cut -over sequence , and Agenda Title: Contract No. WW-662R, Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades
Commission Meeting Date: March 11, 2025
construction of additional service protection per Pacific Gas and Electric Company ( PG&E) requirements. T herefore, SFPUC s taff recommends approval of an increase to the duration contingency.
Scope of Contract: The contract work location is the SEP in San Francisco.
The contract work consists of:
• Construction of a two-story building (SEP Building 032) supported on piles and over the existing primary switching station to house the new primary electrical switchgear;
• Installation of new primary electrical switchgear sized to provide adequate power for all existing electrical loads and future demands and peak loads;
• Installation of two utility power metering cabinets outside Building 032 for connection to the existing PG&E feed and new Hetch Hetchy Power feed;
• Replacement of existing substation transformers at various locations throughout the SEP;
• Installation of new underground electrical infrastructures and a new power monitoring and control system for additional reliability and efficiency;
• Installation of a utility power metering cabinet and electrical gear for incoming Hetch Hetchy Power feed at Bruce Flynn Station; and • Retrofit of existing electrical equipment for the incoming Hetch Hetchy Power feed at the Booster Pump Station.
Modifications to the
Contract:
Modification Nos. 1 to 24 : Staff issued Modification Nos. 1 through 24, increasing the contract amount by $894,283 and increas ing the contract duration by 68 consecutive calendar days, within the original contingencies, for various additional work due to differing site conditions, design clarifications, and costs associated with extended contractor ’s overhead, as well as to account for late start of contractor ’s critical construction activity due to site logistical and Hetch Hetchy Power availability issues, for a total contract amount of $31,638,483, and a total contract duration of 1,238 consecutive calendar days.
Modification Nos. 25 to 45: Staff issued Modification Nos. 25 through 45, in accordance with Resolution No. 23-0055, increasing the contract amount by $1,820,252 and increas ing the contract duration by 417 consecutive calendar days, for various additional work due to differing site conditions, design clarifications, and additional extended Contractor’s overhead related to the delay in delivery of Hetch Hetchy Power to SEP, for a total contract amount of $33,458,735, and a total contract duration of 1,655 consecutive calendar days.
Agenda Title: Contract No. WW-662R, Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades
Commission Meeting Date: March 11, 2025
Recommended Increase to Duration Contingenc y: Staff recommends Commission approve additional duration contingency of 283 calendar days, for a new duration limit of 1,938 consecutive calendar days, with no change to the contract amount, due to differing site conditions, design clarifications, Hetch Hetchy P ower availability issues, operational constraints in the substation cut -over sequence, and construction of additional service protection equipment per PG&E requirements.
Funding and Costs: Funding Source: Project No. CWWSIPSE10, SEP Power Feed and Primary Switchgear Upgrades
Original Contract Amount: $30,744,200
Original 10% Cost Contingency: $3,074,420
Approved Increase in Cost Contingency: $2,000,000
Modified Increases to Contract Amount: $2,714,535
Remaining Cost Contingency: $2,359,885
Recommended Additional Cost Contingency: $0
Total Current Contract Cost Limit: $35,818,620
Schedule: Notice-to-Proceed Date: October 5, 2020
Original Contract Duration: 1,170 consecutive calendar days Original 10% Duration Contingency: 117 calendar days
Approved Increase to Duration Contingency: 368 calendar days Modified Increases to Contract Duration: 485 calendar days Remaining Duration Contingency: 0 calendar days
Recommended Additional Duration Contingency: 283 calendar days Total Proposed Duration Limit: 1,938 consecutive calendar days
Local Business
Enterprise Utilization
and Non-
Discrimination in
Contracting:
The Contract Monitoring Division established a n 8% Local Business Enterprise (LBE) subcontracting requirement for this contract. The contractor committed to a n 11.38 % LBE subcontractor participation with its bid submittal, and this amount remains unchanged.
Agenda Title: Contract No. WW-662R, Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades
Commission Meeting Date: March 11, 2025
Southeast Water Pollution Control Plant
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
WHEREAS, The San Francisco Public Utilities Commission (SFPUC) is addressing the existing primary switchgear and majority of substations at the Southeast Water Pollution Control Plant (SEP) that have reached the end of their useful service life. The SEP Power Feed and Primary Switchgear Upgrades project is to increase reliability, redundancy, and capacity of the electrical system for SEP facilities and nearby pump stations; and
WHEREAS, On July 28, 2020, by Resolution No. 20- 0163, the Commission awarded Contract No. WW -662R, Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades to Blocka Construction, Inc.; and
WHEREAS, The original contract amount was for $30,744,200 and the original contract duration was 1,170 consecutive calendar days; and
WHEREAS, The contract Notice-to-Proceed date was October 5, 2020; and
WHEREAS, Staff issued Modification Nos. 1 to 24, increasing the contract amount by $894,238 and extending the contract duration by 68 consecutive calendar days, within the original contingency, for various additional work due to differing site conditions, design clarifications and costs associated with extended contractor’s overhead, as well as to account for late start of contractor’s critical construction activity due to site logistical and Hetch Hetchy Power grid availability issues, for a revised contract amount of $31,638,483, and a revised contract duration of 1,238 consecutive calendar days; and
WHEREAS, On March 14, 2023, by Resolution No. 23-0055, the Commission approved an increase of $2,000,000 to the cost contingency and an increase of 368 calendar days to the duration contingency, for a total contract amount up to $35,818,620 for a total contract duration up to 1,655 consecutive calendar days; and
WHEREAS, Modification Nos. 25 to 45 increased the contract amount by $1,820,252 and increased the contract duration by 417 consecutive calendar days, in accordance with Resolution No. 23-0055, for various additional work due to differing site conditions, design clarifications, and additional extended Contractor’s overhead related to the delay in delivery of Hetch Hetchy Power grid to SEP, for a total contract amount of $33, 458,735, and a total contract duration of 1,655 consecutive calendar days; and
WHEREAS; Staff recommends an increase of 283 calendar days to the duration contingency, for a revised contract duration limit of 1,938 consecutive calendar days, with no change to the contract amount, due to differing site conditions, design clarifications, delays in delivery of Hetch Hetchy Power grid to SEP, additional time due to operational constraints in the substation cut -over sequence, and construction of additional service protection equipment per
PG&E requirements; and
WHEREAS, The Contract Monitoring Division established a Local Business Enterprise (LBE) subcontracting participation of 8% for this contract, the contractor committed to a n LBE subcontractor participation of 11.38% with its bid submittal, and this amount remains unchanged; and
WHEREAS, Funds are available from Project No. CWWSIPSE10 , Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades; now, therefore, be it
RESOLVED, That this Commission hereby approves an increase of 283 calendar days to the existing duration contingency, for Contract No. WW-662R, Southeast Water Pollution Control Plant Power Feed and Primary Switchgear Upgrades , with Blocka Construction, Inc., for a total duration contingency of 768 calendar days , and a revised duration limit of 1,938 consecutive calendar days, with no change to the contract amount.
I hereby certify that the foregoing resolution was adopted by the San Francisco Public Utilities Commission at its meeting of March 11, 2025.
Director of Commission Affairs
San Francisco Public Utilities Commission