DEPARTMENT Infrastructure Division AGENDA NO. 13
MEETING DATE December 10, 2024
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Regular Calendar
Project Manager: Aileen Caylao
Approve Increase to the Duration Contingency for Contract No. WW-705, Various Locations Sewer Replacement No. 10
Summary of
Proposed
Commission Action:
Approve an increase of 155 calendar days to the duration contingency for Contract No. WW-705, Various Locations Sewer Replacement No. 10, with Mitchell Engineering, for a revised duration limit of up to 815 consecutive calendar days (approximately two years and three months), with no change to contract amount , for project coordination of trenchless work scope and completion of remaining work scope on Golden Gate Avenue.
Background: The San Francisco Public Utilities Commission (SFPUC) Wastewater Enterprise inspected existing sewers on the subject streets specified below within the City and County of San Francisco and identified sewers for replacement. The City constructed the e xisting main sewers to be replaced/lined/mortared between 1870 and 1920, in dimensions of 3’ by 4’-6” and 3’ by 5’ and with pipes ranging from 12-inch to 21-inch in diameter.
On November 8, 2022, by Resolution No. 22-0194, this Commission awarded Contract No. WW-705, Various Locations Sewer Replacement No. 10, to Mitchell Engineering. The original contract amount was $4,739,540 and original contract duration was 350 consecutive calendar days.
On March 26, 2024, by Resolution No. 24- 0074, this Commission approved an increase of 185 calendar days to the duration contingency for a total duration contingency of up to 220 calendar days, to allow for possible modification of the contract duration of up to 570 consecutive calendar days, with no change to the contract amount.
On June 25, 2024, by Resolution No. 24-0146, the Commission approved an increase of 90 calendar days to the duration contingency and an increase of $200,000 to the amount contingency, to allow for possible modification of the contract duration of up to 660 consecutive calendar days and contract amount up to $5,413,494.
Scope of Contract: The contract work is within the City and County of San Francisco and work locations include:
• 23rd Avenue from Anza Street to Balboa Street;
• Turk Street from Webster Street to Laguna Street;
Agenda Title: WW-705, Various Locations Sewer Replacement No. 10 Commission Meeting Date: December 10, 2024
• Hyde Street from Post Street to Sutter Street;
• Sutter Street from Taylor Street to Jones Street;
• O’Farrell Street from Jones Street to Leavenworth Street; • Golden Gate Avenue from Larkin Street to Polk Street; • South Van Ness Avenue from 18th Street to 19th Street; and • Bosworth Street from Lippard Avenue to Hammerton Avenue.
The contract work consists of:
• Replacing existing main sewers with approximately 435 linear feet of 12-inch diameter, 830 line ar feet of 15 -inch diameter, 465 linear feet of 21-inch diameter, and 20 linear feet of 21- inch diameter vitreous clay pipe;
• Cured-in-place lining of approximately 960 linear feet of existing 3’ by 4’-6” and 3’ by 5’ brick sewers, and 1,170 linear feet of existing 3’ by 4’-6” reinforced concrete sewers;
• Slip lining approximately 65 linear feet of 18- inch diameter high density polyethylene pipe within existing 3’ by 5’ brick sewers; and mortaring approximately 40 linear feet of existing 3’ by 4’ -6” brick sewers.
Modifications to the
Contract:
Modification No. 1: Staff issued Modification No. 1, in accordance with Resolution Nos. 24- 0074 and 24-0146, increasing the contract amount by $565,426 and increas ing the contract duration by 310 calendar days, due to differing site conditions resulting in a scope changes and additional project coordination on Golden Gate Avenue and O’Farrell Street, for a revised contract amount of $5,413,494 and a revised contract du ration of 660 consecutive calendar days;
Modification No. 1 exhausted the available
duration contingency.
Recommended Increase to Contract Duration Contingency: Staff recommends this Commission approve 155 calendar days of duration contingency for project coordination of trenchless work scope and completion of remaining work scope on Golden Gate Avenue, with no change to the contract amount, for a new duration limit of up to 815 consecutive calendar days.
Funding and Costs: Funding Source: Wastewater Enterprise Renewal and Replacement Program, Project No. 10035308, Various Locations Sewer Replacement No. 10 Original Contract Amount: $4,739,540
Original 10% Cost Contingency: $473,954
Approved Increase in Cost Contingency: $200,000
Requested Additional Cost Contingency: $0
Total Revised Contract Cost Limit: $5,413,494
Schedule: Notice-to-Proceed Date: January 9, 2023
Original Contract Duration: 350 consecutive calendar days Original 10% Duration Contingency: 35 calendar days
Agenda Title: WW-705, Various Locations Sewer Replacement No. 10 Commission Meeting Date: December 10, 2024
Approved Increases to Duration Contingency: 275 calendar days (for a total duration limit up to 660 days)
Modification No. 1: Contract Duration increased to 660 days Requested New Duration Contingency: 155 calendar days
Total Revised Contract Duration Limit: 815 consecutive calendar days
Environmental
Review:
On July 21, 2021, the San Francisco Planning Department determined the Project to be statutorily exempt from environmental review under California Environmental Quality Act s ection 21080.21 (Case No. 2021- 007307ENV) because the proposed pipeline replacemen t will be in the public right of way and does not exceed one mile in length. The work scope on Golden Gate Avenue is already included in the scope of work analyzed by this exemption.
The exemption can be found here:
https://sfpuc.sharefile.com/d-sa609b8cd143148c28709d850d12bd491
Local Business
Enterprise
Utilization and Non-
Discrimination in
Contracting:
The Contract Monitoring Division established a 10% Local Business Enterprise (LBE) subcontracting requirement for this contract. The contractor committed to a 10.39% LBE subcontractor participation, and this amount remains unchanged.
Agenda Title: WW-705, Various Locations Sewer Replacement No. 10 Commission Meeting Date: December 10, 2024
Project Location Map
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
WHEREAS, The San Francisco Public Utilities Commission (SFPUC) inspected existing sewers in the City and County of San Francisco, identified sewers needing replacement, and issued a request for bids for Contract No. WW-705, Various Locations Sewer Replacement No. 10; and
WHEREAS, On November 8, 2022, by Resolution No. 22-0194, the Commission awarded Contract No. WW-705, Various Locations Sewer Replacement No. 10 to Mitchell Engineering; and
WHEREAS, The original contract amount was for $4,739,540 and the original contract duration was 350 consecutive calendar days; and
WHEREAS, The contract Notice-to-Proceed date was January 9, 2023; and
WHEREAS, On March 26, 2024, by Resolution No. 24- 0074, the Commission approved an increase of 185 calendar days to the duration contingency for a total duration limit of up to 570 consecutive calendar days, with no change to the contract amount or amount contingency; and
WHEREAS, On June 25, 2024, by Resolution 24-0146, the Commission approved an increase of 90 calendar days to the duration contingency and an increase of $200,000 to the amount contingency, for a total duration limit of up to 660 consecutive calendar days and total contract amount up to $5,413,494; and
WHEREAS, Modification No. 1 increased the contract amount by $565,426 and extended the contract duration by 310 calendar days , for a revised contract amount of $5,413,494 and a revised contract duration of 660 consecutive calendar days , exhausting the appr oved duration contingency; and
WHEREAS, Staff recommends a new contin gency of 155 calendar days to allow for project coordination of trenchless work scope to complete remaining work scope on Golden Gate Avenue, with no change to the contract amount, for a revised duration limit up to 815 consecutive calendar days; and
WHEREAS, The Contract Monitoring Division established a Local Business Enterprise (LBE) subcontractor participation of 10% for this contract, and the contractor committed to a n LBE subcontractor participation of 10.39% with its bid submittal, and this remains unchanged; and
WHEREAS, On July 21, 2021, the San Francisco Planning Department determined the Project to be statutorily exempt from environmental review under California Envir onmental Quality Act section 21080.21 (Case No. 2021 -007307ENV) because the proposed pipeline replacement will be in the public right of way and does not exceed one mile in length, and the work scope on Golden Gate Avenue is already included in the scope of work analyzed by this exemption; and
WHEREAS, Funds are available from Project No. 10035308, Various Locations Sewer Replacement No. 10; now, therefore, be it
RESOLVED, That this Commission hereby approves a new duration contingency of 155 calendar days for Contract No. WW -705, Various Locations Sewer Replacement No. 10, for a revised duration limit of up to 815 consecutive calendar days, with no change to contract amount.
I hereby certify that the foregoing resolution was adopted by the Public Utilities Commission at its meeting of December 10, 2024.
Director of Commission Affairs
San Francisco Public Utilities Commission