SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean.
WW-628 Southeast Plant New Headworks Facility
Project
Jignesh Desai, P.E., Principal Project Manager
Presentation to: SFPUC
5/13/2025
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. 2 • Remove Grit to protect
downstream processes
• Improve odor, noise, and
visual quality
• Provide reliability and
operational flexibility
• Improve seismic reliability
• Meet the permitted capacity
of 250 million gallons per day
(MGD)
SEP New Headworks Facility Project
Objectives
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean.
SEP New Headworks Facility Project
Scope of Work
3 N
Main Headworks
Evans Avenue
Rankin St.
Quint Street
Bruce
Flynn
PS
Bruce
Flynn
PS
Odor Control
Scope III
Scope I
Scope II.A
Lift
Station
Scope I – Site Preparation (Complete)
Scope II.A – BFS Upgrades (Complete)
Scope III – Main Headworks (In-service)
Odor Control Facility (In-service)
Lift Station Rehabilitation (In-service)
Old Headworks – Amendment 8 Demo Scope
Old
Headworks
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. • Envision Gold (Sustainability Level of achievement)
• 14.5B gallon combined flow treated to-date (In-service since August 5, 2024) • Improved visual quality (Level of Service)
• Two-stage Odor Control – 0 ppb at the stack (after carbon) (Level of Service) • Seismic reliability achieved (Level of Service)
• Met the permitted capacity of 250 million gallons per day (MGD) • Grit Removal >96% removal of ≥ 105 μ
• Grit Moisture – 5-9.4 % Organics – 1.4-1.7%
SEP New Headworks Facility Project
Performance to-date
4 SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. • Changes to Approved Contract Amount
• No Change. The demolition scope is estimated at $6.9 M including contingency and is within previously approved contract amount via Commission Resolution 24-0078.
• Increase to Duration
• An additional 212 days needed to demolish old all-weather Headworks • Reasons for Amendment
• Amendment No. 8 if approved will demolish the old all-weather Headworks that is no longer needed by Operations since new Headworks has been in-service since August 5, 2024
• Southeast Plant is very congested with all on-going work and demolishing old Headworks will provide additional space for staging and parking within plant boundary
• The proposed amendment is aligned with the Commission adopted SFPUC 10-Year Capital Plan
SEP New Headworks Facility Project
Proposed Contract Amendment No. 8
5 SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean. 6 Questions
DEPARTMENT
Infrastructure Division
AGENDA NO. 9
MEETING DATE
May 13, 2025
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Regular Calendar
Contract/Project Manager: Jignesh Desai
Approve Increase to Duration Contingency for Contract No. WW-628, Southeast Water Pollution Control Plant New Headworks Facility
Summary of Proposed
Commission Action:
Approve an increase of 212 cal endar days to the duration contingency for Contract No. WW-628, Southeast Water Pollution Control Plant New Headworks Facility , with Sundt-Walsh Joint Venture (Construction Manager/General Contractor or CM/GC) , for a revised duration limit of up to 3,516 consecutive calendar days, with no change to the contract amount of $570,380,175, to complete the remaining contract work, and add new scope to demolish the existing all -weather Headworks (SEP 012) , which is no longer needed, as the New Headworks Facility is fully operational.
Background: The San Francisco Public Utilities Commission (SFPUC) Wastewater Enterprise Headworks facility is one of the most odorous treatment processes in the wastewater stream. It contains critical solids removal equipment, such as fine screens, grit removal, and o
dor control systems. The existing fine
screening and grit removal processes are inefficient and significantly impact the performance of downstream processes at Southeast Water Pollution Control Plant (SEP). Upgrading these systems with a new Headworks facility will improve the downstream treatment processes and protect the existing and new equipment from damage caused by debris such as rags, sand, and abrasive grit.
On May 24, 2016, by Resolution No. 16- 0099, this Commission awarded Construction Manager/General Contractor (CM/GC) Contract No. WW-628, Southeast Water Pollution Control Plant New Headworks Facility. The original contract amount was $244,562,224, and the original contract duration was 2,658 consecutive calendar days.
On February 28, 2017, by Resolution No. 17-0043, this Commission adopted the CEQA Findings, including the Final Mitigated Negative Declaration (FMND), and the Mitigation Monitoring and Reporting Program, and approved the Headworks Project and authorized th e General Manager to proceed with construction of the project under Contract No. WW -628; and approved Modification No. 1 increasing the contract amount by $11,600,000 for a total contract amount of $256,162,224, with no change to the contract duration.
On December 11, 2018, by Resolution No. 18 -0208, this Commission Agenda Title: WW-628, Southeast Water Pollution Control Plant New Headworks Facility Commission Meeting Date: May 13, 2025
approved Modification No. 2 increasing the contract amount by $36,017,960 for a total contract amount of $292,180,184, with no change to the contract duration, and increasing the cost contingency by $18,630,619, for a total cost limit of up to $335,267,025 and increasing the duration contingency by 75 calendar days, for a revised duration limit of up to 2,936 consecutive calendar days.
On December 22, 2020, by Resolution No. 20-0249, this Commission approved Modification No. 3 increasing the contract amount by $106,321,923, for a total c ontract amount of $ 398,502,107, and increasing the contract duration by 111 consecutive calendar days, for a total contract duration of 2,769 consecutive calendar days.
On March 9, 2021, by Resolution No. 21-0041, this Commission approved Modification No. 4 increasing the contract amount by $91,749,642, for a total contract amount of $490,251,749, with no change to the contract duration.
On October 24, 2022, by Resolution No. 22-0184, this Commission approved Modification No. 5 increasing the contract amount by $58,572,067, for a total contract amount of $548,823,816, with no change to the contract duration, and decreasing the cost contingency by $40,530,482, for a total cost limit of up to $555,380,175.
On March 26, 2024, by Resolution No. 24-0078, this Commission approved Modification No. 6 increasing the contract amount by $7,158,234 for a total contract amount of $555,982,050, with no change to the contract duration, and increasing the cost contingency by $7,841,766 for a total cost contingency of $14,398,125 and a total cost limit of up to $570,380,175 and increasing the duration contingency by 257 calendar days, for a total revised duration limit of up to 3,304 consecutive calendar days.
The CM/GC has accomplished the following milestones:
• Scope I – Site Preparation (100% complete)
• Scope II – Bruce Flynn Pump Station Improvements (100% complete)
• Scope III – Main Headworks (97% complete)
o New Headworks Facility is in-service and have treated ~12.9 billion gallons to-date
o Distributed Control System (DCS) testing for Headworks is ~90% complete.
o DCS Testing of trough belt conveyor, pumping system, and coarse screen compactor is underway.
o Preparation for street restoration and site restoration has also begun. While the New Headworks is in operation, minor
scope items associated with Substantial Completion such as Agenda Title: WW-628, Southeast Water Pollution Control Plant New Headworks Facility Commission Meeting Date: May 13, 2025
streetscape, elevators, belt conveyor and DCS testing are still being finalized.
Scope of Contract: The contract work location is in the City and County of San Francisco.
Detail of Work under this Contract:
• Scope I – Site Preparation
o Construction of a new work- around pipe to bypass the old wet weather Headworks facility.
o Demolition of wet weather Headworks (SEP 011).
• Scope II – Bruce Flynn Pump Station Improvements
o New bar screens, new lift pumps and upgrades to the electrical system.
o New odor control units to minimize impacts to surrounding communities.
• Scope III – Main Headworks
o New Influent Junction Structure and Influent Monitoring. o New screening and grit removal facilities.
o Construction of the new Odor Control Facility.
o Rehabilitation of the existing Southeast Lift Station. o Installation of art wall and aesthetic improvements.
Modifications to the
Contract:
Modification Nos. 1 -6: This Commission approved Modifications 1 -6, in accordance with Resolution Nos. 17-0043, 18-0208, 20-0249, 21-0041, 22- 0184, 24-0078, increasing the contract amount by $311,419,826, for a total contract amount of $555,982,050, and increasing the contract duration by 553 consecutive calendar says, for a total contract duration of 3,211 consecutive calendar days.
Modification N
o. 7: Effective August 20, 2024, the SFPUC modified the Contract within the approved contingency and increased the contract amount by $14,398,125 for a total contract amount of $570,380,175.
Recommended Increase to Duration Contingency: S taff recommends the Commission approve an additional duration contingency of 212 calendar days, for a new total c ontract duration limit of 3,516 consecutive calendar days, with no change in c ontract amount of $570,380,175, to complete the remaining contract work, and add new scope to demolish the existing all - weather Headworks (SEP 012), which is no longer needed, as the New Headworks Facility is fully operational as of August 5, 2024. The cost associated with demolition of existing all-weather Headworks is estimated to be $6,900,000 including contingency. The remaining contract amount to-date from approved Modification No. 7 is $5,470,000. The delta of $1,430,000 is anticipated to be funded from unused allowances from approved trade packages of Scope III. Therefore, no contract amount increase is needed as the existing $570,380,175 that was previously approved by the Commission under Resolution No. 24-0078 is sufficient to complete all work.
Agenda Title: WW-628, Southeast Water Pollution Control Plant New Headworks Facility Commission Meeting Date: May 13, 2025
This demolition scope of old existing all -weather Headworks (SEP 012) consists of the following:
• Isolate and cap-off all the utilities connected to the SEP 012 • Remove and dispose of all electrical and mechanical equipment associated with screening and grit removal and handling processes • Remove carbon and biological odor control units and associated fans • Remove concrete super structure and dispose of concrete debris • Site clean-up and restoration
Funding and Costs: Funding Source: Project No. 10015807 , SEP New Headworks (Grit) Removal Project and withing the following projects:
• Project No. CWWSIPSE07 – SEP Facility-wide Distributed Control System Upgrades
• Project No. CWWSIPSE08 – SEP Seismic Reliability and Condition Assessment Improvements
• Project No. CWWSIPSE10 – SEP Power Feed and Primary
Switchgear Upgrades
Original Contract Amount: $244,562,224
Original Cost Contingency: $28,456,222
Current Approved Cost Contingency: $14,398,125
Modified Increases to Contract Amount: $325,817,951
Remaining Cost Contingency: $0
Recommended Additional Cost Contingency: $0
Total Cost Limit: $570,380,175
Schedule: Notice-To-Proceed Dates:
• Pre-Construction: August 15, 2016
• Construction: November 15, 2017
Original Contract Duration: 2,658 consecutive calendar days Original Duration Contingency: 203 calendar days
Approved Increase to Duration Contingency: 332 calendar days Modified Increases to Contract Duration from Contingency : 442 consecutive calendar days
Modified Increases to Contract Duration from Commission : 111 consecutive calendar days
Remaining Duration Contingency: 93 calendar days
Recommended Additional Duration Contingency: 212 calendar days Total Proposed Duration Limit: 3,516 consecutive calendar days
Environmental
Review:
On December 19, 2016 , the Planning Department issued a Final Mitigated Negative Declaration for Project No. CWWSIPSE02, Southeast Plant Agenda Title: WW-628, Southeast Water Pollution Control Plant New Headworks Facility Commission Meeting Date: May 13, 2025
Headworks Replacement Project (Case No. 2015-006224ENV), prepared pursuant to the California Environmental Quality Act (CEQA).
On February 28, 2017, by Resolution No. 17-0043, this Commission adopted the Final Mitigated Negative Declaration, CEQA Findings, and a Mitigation Monitoring and Reporting Program, as required by the CEQA, and approved the SEP New Headworks Facility Project.
On March 7, 2019, the Planning Department issued an Addendum to the Final Mitigated Negative Declaration, including a revised Mitigation Monitoring and Reporting Program, to upgrade the Bruce Flynn Pump Station, construct a new Southeast Lift Station, and other associated changes. On October 8, 2019, by Resolution No. 19-0195, this Commission reviewed and considered the Addendum to the Final Mitigated Negative Declaration and the revised Mitigation Monitoring and Reporting Program to approve the modification.
The work under this modification, to demolish the existing all- weather Headworks (SEP 012), is within the scope of the project authorized under the Final Mitigated Negative Declaration and Addendum.
The Final Mitigated Negative Declaration , Addendum, CEQA Findings, Resolution Numbers 17-0043 and 19-0195, and the revised Mitigation Monitoring and Reporting Program can be found here:
https://sfpuc.sharefile.com/public/share/web-
sb96f1d1444a74fc2bd6f710664c1bf5e
Local Business
Enterprise Utilization
and Non-
Discrimination in
Contracting:
The Contract Monitoring Division established a 15% Local Business Enterprise (LBE) subcontracting requirement for this contract. The contractor committed to a 15% LBE subcontractor participation with its bid submittal.
Agenda Title: WW-628, Southeast Water Pollution Control Plant New Headworks Facility Commission Meeting Date: May 13, 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) has undertaken improvements to the existing Wastewater Enterprise Headworks facility, that has had antiquated, inefficient fine screening and grit removal processes , which is significantly impacting the performance of downstream processes at the Southeast Wastewater Treatment Plant; and
WHEREAS, On May 24, 2016 by Resolution No. 16-0099, this Commission awarded Contract No. WW-628, Southeast Water Pollution Control Plant New Headworks Facility, to Sundt-Walsh Joint Venture (Construction Manager/General Contractor or CM/GC); and
WHEREAS, The original contract amount was for $244,562,224 and the original contract duration was 2,658 consecutive calendar days; and
WHEREAS, On August 15, 2016, the SFPUC issued pre-construction Notice-To-Proceed, and on November 15, 2017, the SFPUC issued construction Notice-To-Proceed; and
WHEREAS, On February 28, 2017, by Resolution No. 17- 0043, this Commission approved Modification No. 1 increasing the contract amount by $11,600,000 for a total contract amount of $256,162,224, with no change to the contract duration; and
WHEREAS, On December 11, 2018, by Resolution No. 18- 0208, this Commission approved Modification No. 2 increasing the contract amount by $36,017,960 for a total contract amount of $292,180,184, with no change to the contract duration, and increasing the contract cost contingency by $18,630,619, for a total contract cost limit of up to $335,267,025 and increasing the contract duration contingency by 75 calendar days, for a total contract duration limit of up to 2,936 consecutive calendar days; and
WHEREAS, On December 22, 2020, by Resolution No. 20- 0249, this Commission approved Modification No. 3 increasing the contract amount by $106,321,923, for a total contract amount of $398,502,107, and increasing the contract duration by 111 consecutive calendar days, for a total contract duration of 2,769 consecutive calendar days; and
WHEREAS, On March 9, 2021, by Resolution No. 21- 0041, this Commission approved Modification No. 4 increasing the contract amount by $91,749,642, for a total contract amount of $490,251,749, with no change to the contract duration; and
WHEREAS, On October 24, 2022, by Resolution 22- 0184, this Commission approved Modification No. 5 increasing the contract amount by $58,572,067, for a total contract amount of $548,823,816, with no change to the contract duration; and
WHEREAS, On March 26, 2024, by Resolution No. 24-0078, this Commission approved Modification No. 6, increasing the contract amount by $7,158,234 for a total contract amount of
$555,982,050, with no change to the contract duration, and increasing the contract cost contingency by $7,841,766 for a total cost contingency of $14,398,125 and a cost limit of up to $570,380,175 and increasing the contract duration contingency by 257 calendar days, for a total contract duration limit of up to 3,304 consecutive calendar days; and
WHEREAS, On August 20, 2024, the SFPUC issued Modification No. 7 within the approved contingency increasing the contract amount by $14,398,125 for a total contract amount of $570,380,175; and
WHEREAS, The New Headworks Facility (SEP 020) is fully operational and there is a need to demolish the old existing all -weather Headworks (SEP 012), which is no longer needed; and
WHEREAS, Staff recommends an increase of 212 calendar days to the contract duration contingency, to complete the remaining contract work and add new scope of demolishing the old existing all-weather Headworks (SEP 012); and
WHEREAS, Contract Monitoring Division established a Local Business Enterprise (LBE) subcontracting participation of 15% for this contract, and the contractor committed to a n LBE subcontractor participation of 15% with its bid submittal; and
WHEREAS, Funds are available from Project No. Project No. 10015807, SEP New Headworks (Grit) Removal Project; and
WHEREAS, On December 19, 2016, the Planning Department issued a Final Mitigated Negative Declaration for Project No. CWWSIPSE02, Southeast Plant Headworks Replacement Project (Case No. 2015-006224ENV) prepared pursuant to the California Environmental Quality Act (CEQA); and
WHEREAS, On February 28, 2017, by Resolution No. 17-0043, this Commission adopted the Final Mitigated Negative Declaration, the CEQA Findings, and a Mitigation Monitoring and Reporting Program, as required by the CEQA, and approved the SEP New Headworks Facility Project; and
WHEREAS, On March 7, 2019, the Planning Department issued an Addendum to the Final Mitigated Negative Declaration , including a revised Mitigation Monitoring and Reporting Program, for the Modified Project to upgrade the Bruce Flynn Pump Station, construct a new Southeast Lift Station, and other associated changes determining that no supplemental environmental review was needed beyond the Addendum; and
WHEREAS, On October 8, 2019, by Resolution No. 19-0195, this Commission reviewed and considered the Addendum and the revised Mitigation Monitoring and Reporting Program to approve the modification; and
WHEREAS, The work under this modification to demolish the existing all- weather Headworks (SEP 012) is within the scope of the project authorized under the Final Mitigated Negative Declaration and Addendum; and
WHEREAS, The San Francisco Planning Department is the custodian of records, located in the files for Case No. 2015-006224ENV , at 49 South Van Ness Avenue, Suite 1400, San Francisco, California; and
WHEREAS, Staff has made t he Project files, including the Final Mitigated Negative Declaration, Addendum, SFPUC Resolution Numbers 17-0043 and 19-0195, CEQA Findings, and the revised Mitigation and Monitoring Reporting Program available for review by this Commission and the public, and those files are part of the record before this Commission; and
WHEREAS, This Commission has reviewed and considered the information contained in the Final Mitigated Negative Declaration , Addendum, the CEQA F indings and Resolution Numbers 17-0043 and 19-0195, the Mitigation and Monitoring Reporting Program, and all written and oral information provided by the Planning Department, the public, relevant public agencies, SFPUC and other experts and the administrative files for the Project; now, therefore be it
RESOLVED, This Commission has reviewed and considered the Final Mitigated Negative Declaration and the Addendum and the record as a whole, finds that the Final Mitigated Negative Declaration is adequate for its use as the decision –making body for the Project and incorporates the CEQA Findings and Resolution Numbers 17-0043 and 19-0195 by this reference thereto as though set forth in this Resolution; and be it
FURTHER RESOLVED, This Commission further finds that since the Final Mitigated Negative Declaration and Addendum were finalized, there have been no substantial Project changes and no substantial changes in Project circumstances that would require major revisions to the Final Mitigated Negative Declaration and Addendum due to the involvement of new significant environmental effects or an increase in the severity of previously identified significant impacts, and there is no new information of substantial importance that would change the conclusions set forth in them; and be it
FURTHER RESOLVED, That this Commission hereby approves an increase of 212 calendar days to the existing contract duration contingency for Contract No. WW-628, Southeast Water Pollution Control Plant New Headworks Facility , for a total duration continge ncy of 747 calendar days, and a new total duration limit of 3,516 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 May 13, 2025.
Director of Commission Affairs
San Francisco Public Utilities Commission