DEPARTMENT
Infrastructure
AGENDA NO. 6b
MEETING DATE
August 22, 2023
Last updated: 05.03.2023
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Consent Calendar
Contract/Project Manager: Carman Luk
Accept Work, Approve Modification, and Authorize Final Payment for Contract No.
WW-667, Mariposa Dry Weather Pump Station Improvements
Summary of Proposed
Commission Action:
Accept work performed by Western Water Constructors, Inc. , under Contract No. WW- 667, Mariposa Dry Weather Pump Station Improvements; Approve Modification No. 22 (Final) decreasing the contract amount by $26,853, and increasing the contract duration by 216 calendar days, to revise the security gate/lockset to comply with the Americans with Disabilities Act and concurrently complete remaining punch list items, for a total contract amount of $18,506,438 and a total contract duration of 1,566 consecutive calendar days (approximately four years and four months) ; and authorize
final payment to the
contractor.
Background: In 1954, the City and County of San Francisco (City) designed and built the Mariposa Pump Station (Pump Station) on Port property near the foot of Mariposa Street at 855 Terry Francoise Boulevard to convey combined wastewater flows from approximately 240 acres of the City to the Southeast Water Pollution Control Plant. Subsequently, the City installed a transport/storage box with wet -weather pumps and a wet - weather force main (Force Main) adjacent to the original pump station.
After the City installed the wet- weather system, the Pump Station and associated force main have conveyed both dry and wet weather wastewater flows to the Southeast Water Pollution Control Plant.
Due to recent high-density real estate developments in the City, the dry- weather wastewater flows to the Pump Station have increased. The San Francisco Public Utilities Commission (SFPUC) evaluated the anticipated increase in wastewater flows and developed the Mariposa Dry-Weather Pump Station and Force Main improvements (the Project) in order to convey the increased combined dry -weather sewa ge to
Southeast Water Pollution Control Plant and meet its regulatory requirements.
The SFPUC completed the Force Main portion of the Project under contract DB -128R2, the Bay Corridor Transmission Distribution Agenda Title: WW-667, Mariposa Dry Weather Pump Station Improvements Commission Meeting Date: August 22, 2023
Project – Phase 1, which this Commission awarded on April 25, 2017, by Resolution 17-0092.
Western Water Constructors, Inc. , performed t he remaining pump station portion of the Project under Sewer System Improvement Program (SSIP) -funded Contract No. WW -667, Mariposa Pump Station Improvements, which the Commission awarded on September 11, 2018, by Resolution No. 18-0150, with original contract amount of $17,031,000, and contract duration of 780 consecutive calendar days.
Scope of Contract: The location of the contract work was the Mariposa Pump Station, 855 Terry A. Francoise Boulevard, in San Francisco.
The work under this contract consisted of:
• Demolition of the existing pump station and wet-well; • Construction of a new wet-well and pump station building; • Furnish and installation of new dry-weather pumps, manifold, piping and associated valves, pipe supports, flow meters and other associated parts;
• Installation of new crane systems inside the pump station; • Installation of new heating, ventilation, and air conditioning (HVAC) systems;
• Installation of new electrical, instrumentation & controls systems; and
• Testing and commissioning of all major mechanical, electrical, instrumentation and automation systems before turning over the station to SFPUC for operation.
Modifications to the
Contract:
Final Modification No. 22 (Final) : Staff recommends Commission approve Modification No. 22 (Final) to decrease the Contract amount by $26,853, and extend the Contract duration by 216 consecutive calendar days, to revise the security gate/lockset to comply with the Americans with Disabilities Act and concur rently complete remaining punch list work items, resulting in a final not-to-exceed contract amount of $18,506,438 and extending the Contract term to 1,566 consecutive calendar days.
Modification Nos. 1 to 4 increased the Contract amount by $406,754 (within the original contingency) to upgrade the security system and provide temporary generators necessary for critical Contract work to proceed pending temporary power from PG&E, for a total Contract amount of $17,437,754, with no change to the Contract duration.
On May 12, 2020, by Resolution No. 20- 0084, this Commission approved an increase of 282 calendar days to the C ontract duration contingency for a total Contract duration of up to 1,140 consecutive calendar days, with no change in the Contract amount.
Agenda Title: WW-667, Mariposa Dry Weather Pump Station Improvements Commission Meeting Date: August 22, 2023
On March 22, 2022, by Resolution No. 22 -0056, this Commission approved an increase of 210 calendar days to the C ontract duration contingency for a total Contract duration of up to 1,350 c onsecutive calendar days, with no change in the Contract amount.
Modification Nos. 5 to 21 increased the Contract amount by $1,095,537 (within the original contingency) and increased the contract duration by 570 consecutive calendar days, in accordance wi th Resolution No. 22-0056, due to unforeseen site conditions, equipment procurement, design changes, COVID-related work inefficiencies, and additional trainings, for a total contract amount of $18,533,291 and a total Contract duration of 1,350 consecutive calendar days.
Funding and Costs: Funding Source: Sewer System Improvement Program (SSIP) Project No. 10036832, Mariposa Dry Weather Pump Station Improvements Original Award Amount: $17,031,000
Modification Nos. 1-4: $406,754
Modification Nos. 5-21: $1,095,537
Modification No. 22 (Final): ($26,853)
Total Final Contract Amount: $18,506,438
Schedule: Notice-to-Proceed Date: January 28, 2019
Original Contract Duration: 780 consecutive calendar days (approximately two years and two months)
Modification Nos. 1 to 4 Duration: Zero calendar days
Modification Nos. 5 to 21 Duration: 570 calendar days
Modification No. 22 (Final): 216 calendar days
Total Final Contract Duration: 1,566 consecutive calendar days
Local Business
Enterprise Participation
and Non-Discrimination
In Contracting:
The Contract Monitoring Division established a 13% Local Business Enterprise (LBE) subcontracting requirement for this contract. The contractor committed to a 23.98% LBE participation with its bid submittal. CMD determined that the contractor achieved a final LBE participation of 28.47% for this contract.
Attachment: 1. Contract Monitoring Division Memorandum.
Agenda Title: WW-667, Mariposa Dry Weather Pump Station Improvements Commission Meeting Date: August 22, 2023
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
WHEREAS, On September 11, 2018, by Resolution No. 18-0150, the San Francisco Public Utilities Commission (SFPUC) awarded Contract No. WW- 667, Mariposa Dry Weather Pump Station Improvements to Western Water Constructors, Inc. , to perform work necessary to accommodate the increased combined dry- weather sewage to the Southeast Water Pollution Control Plant and meet regulatory requirements; and
WHEREAS, On January 28, 2019, the SFPUC issued t he construction notice-to-proceed for this project; and
WHEREAS, The original Contract amount was for $17,031,000 and the original Contract duration was 780 consecutive calendar days; and
WHEREAS, Modifications Nos. 1 through 4 increased the Contract amount by $406,754, within the original contingency, for unforeseen changes to Contract work, to upgrade the security system, and provide temporary generators necessary for critical Contract work to proceed pending temporary power from PG&E, for a total C ontract amount of $17,437,754, with no change to the contract duration; and
WHEREAS, On May 12, 2020, by Resolution No. 20-0084, this Commission approved an increase of 282 calendar days to the C ontract duration contingency for a total C ontract duration limit of up to 1,140 consecutive calendar days, with no change in Contract amount; and WHEREAS, On March 22, 2022, by Resolution No. 22-0056, this Commission approved an increase of 210 calendar days to the Contract duration contingency for a total Contract duration limit of up to 1,350 consecutive calendar days, with no change in Contract amount; and WHEREAS, Modifications No. 5 through 21 increased the C ontract amount by $1,095,537, within the original contingency, and increased the C ontract duration by 570 consecutive calendar days, in accordance with Resolution No. 22- 0056, for unforeseen site conditions, equipment procurement, design changes, COVID -related work inefficiencies, and additional operational trainings, for the total Contract amount of $18,533,291 and a total Contract duration of 1,350 consecutive calendar days; and
WHEREAS, Staff recommends approval of Modification No. 22 (Final) to decrease the Contract amount by $26,853, and increase Contract duration by 216 calendar days to revise the security gate/lockset to comply w ith the Americans with Disabilities Act and concurrently complete remaining punch list work items, for a total Contract amount $18,506,438, and a total Contract duration of 1,566 consecutive calendar days; and WHEREAS, The Contract Monitoring Division established a 13% Local Business Enterprise (LBE) subcontracting requirement for this contract, and Western Water Constructors, Inc. committed to 23.98 % LBE participation in its bid submittal and achieved a final LBE participation of 28.47%; and
WHEREAS, Funds are available from Project No. Project No. 10036832, Mariposa Dry Weather Pump Station Improvements; now, therefore, be it
RESOLVED, That this Commission hereby accepts work perfor med by Western Water Constructors, Inc. under Contract No. WW- 667, Mariposa Dry Weather Pump Station Improvements; approves Modification No. 22 (Final), for a decrease to contract amount of $26,853 and an increase to Contract duration of 216 consecutive calendar days, for a total Contract amount of $18,506,438 and a total C ontract duration of 1,566 consecutive calendar days; and authorizes final payment to the contractor
I hereby certify that the foregoing resolution was adopted by the Public Utilities Commission at its meeting of August 22, 2023.
Secretary, Public Utilities Commission
London N. Breed, Mayor
Carmen Chu, City Administrator
Stephanie Tang, Director
1155 Market Street, 4th Floor, San Francisco, CA 94103 Telephone (415) 581-2310 Fax (415) 581-2351
CONTRACT MONITORING DIVISION
OFFICE OF THE CITY ADMINISTRATOR
June 28, 2023
To: Carman Luk, SFPUC
Joseph Liu, SFPUC
From: Adriana Duran, CMD
Subject: Closeout for WW-667 - Mariposa Dry Weather Pump Station Improvements
The Contract Monitoring Division (“CMD”) has determined that Western Water Constructors (“Western Water”) has substantially complied with the LBE subcontracting requirements associated with this project.
At the time the project was advertised, CMD established an LBE subcontracting requirement of 13%. The Prime’s Document 00 43 36 reflected an LBE subcontracting participation of 23.98%. Western Water (the Prime Contractor) was awarded the contract in the amount of $17,031,000, which after 43 change orders was modified by $1,475,437.27 for a total amount of $18,506,437.27. Western Water’s LBE subcontracting participation at closeout is as follows:
Firm Scope of Work LBE Status Original Credited
Contract Participation
Final Credited Contract
Participation
US Electric
Technologies
Electrical/Instrumental/
Security
SF LBE MBE
(Micro) $3,571,258 20.97% $4,794,461.00 25.69%
Bullard’s
Heating &
Air Inc.
HVAC SF LBE MBE
(Micro) $512,500 3.01% $519,126.29 2.78% *
TOTAL LBE Subcontractor Participation $4,083,758 23.98% $4,890,992.40 28.47% * On its Form 8, Bullard’s Heating & Air Inc. Indicated that it further sub-contracted to two non-LBE firms: Syserco, in the amount of $48, 657.00 and MTB, in the amount of $8,500.00, which is a total of $57,157.00 dollars that was subtracted from Bullard’s Form 8 total amount of $576,283.29. As a result, Bullard’s LBE credited amount is $519,126.29.
Based on the foregoing, CMD concurs with the closeout of this contract. Should you have any questions, or if I can be of further assistance, please do not hesitate to contact me at (415) 598-7368.