DEPARTMENT
Infrastructure
AGENDA NO.
6e
MEETING DATE
March 26, 2024
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Consent Calendar
Project Manager: Aileen Caylao
Approve Increase to the Contract Duration Contingency for Contract No. WW-705, Various Locations Sewer Replacement No. 10
Summary of
Proposed
Commission Action:
Approve an increase of 185 calendar days to the contract duration contingency for Contract No. WW-705, Various Locations Sewer Replacement No. 10, with Mitchell Engineering, for a new contract duration limit of up to 570 consecutive calendar days (approximately one year and seven months), due to delays caused by unforeseen private utility conflicts and pothole coordination resulting in a work scope change on O’Farrell Street and Golden Gate Avenue from open cut pipeline replacement to trenchless installation method, with no change to the contract amount.
Background: The San Francisco Public Utilities Commission (SFPUC) Wastewater Enterprise i nspected existing sewers on several streets within the City and County of San Francisco (specific locations listed below) and determined certain sewers should be replaced. The existing main sewers to be replaced/lined/mortared were constructed primarily between 1870 to 1920, in dimensions of 3’ by 4’-6” and 3’ by 5’ and with pipes ranging from 8-inch to 16-inch in diameter.
On November 8, 2022, by Resolution 22- 0194, the Commission awarded Contract No. WW-705, Various Locations Sewer Replacement No. 10 to Mitchell Engineering. The original contract amount was $4,739,540 and the original contract duration was 350 consecutive calendar days.
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;
• 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.
Agenda Title: WW-705, Various Locations Sewer Replacement No. 10 Commission Meeting Date: March 26, 2024
The original contract work consists of:
• Replacing existing main sewers with approximately 434 linear feet of 12-inch diameter, 826 linear feet of 15- inch diameter, 464 linear feet of 21-inch diameter, and 13 linear feet of 21- inch diameter vitreous clay pipe;
• Cured-in-place lining of approximately 958 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;
• Sliplining approximately 65 linear feet of 18- inch diameter high density polyethylene pipe within existing 3’ by 5’ brick sewers; and • Mortaring approximately 36 linear feet of existing 3’ by 4’ -6” brick sewers.
Modifications to the
Contract:
Recommended Increase to Contract Duration Contingency: Staff recommends the Commission approve an increase to the contract duration contingency by 185 calendar days, due to delays caused by unforeseen private utility conflicts and pothole coordination resulting in a work scope change on O’Farrell Street and Golden Gate Avenue from open cut pipeline replacement to trenchless installation method, for a new contract duration limit up to 570 consecutive calendar days, with no change to the contract amount.
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
Requested Additional Cost Contingency: $0
Total Revised Contract Cost Limit: $5,213,494
Schedule: Notice-to-Proceed Date: January 9, 2023
Original Contract Duration: 350 consecutive calendar days Original 10% Duration Contingency: 35 calendar days
Requested Additional Duration Contingency: 185 calendar days Total Revised Contract Duration Limit: 570 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 (CEQA) Section Number 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. The work scope change on O’Farrell Street and 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
Agenda Title: WW-705, Various Locations Sewer Replacement No. 10 Commission Meeting Date: March 26, 2024
Project Location Map
Local Business
Enterprise
Participation and
Non-Discrimination
In Contracting:
The Contract Monitoring Division established a 10% Local Business Enterprise subcontracting requirement for this contract. The contractor committed to 10.39% Local Business Enterprise participation with its bid submittal.
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, Staff recommends an increase of 185 calendar days to the contract duration contingency due to delays caused by unforeseen private utility conflicts and pothole coordination resulting in a work scope change on O’Farrell Street and Golden Gate Avenue from open cut pipeline replacement to trenchless installation method, for a new contract duration limit up to 570 consecutive calendar days, with no change to the contract amount; and WHEREAS, The Contract Monitoring Division established a Local Business Enterprise subcontracting participation of 10% for this contract, and the contractor committed to 10.39% Local Business Enterprise participation of with its bid submittal; and WHEREAS, On July 21, 2021, the San Francisco Planning Department determined the Project to be statutorily exempt from environmental review under California Environmental Quality Act (CEQA) Section Number 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 change on O’Farrell Street and 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 an increase of 185 calendar days to the existing contract duration contingency for Contract No. WW -705, Various Locations Sewer Replacement No. 10, for a total contract duration contingency amount of up to 220 calendar days and a new contract duration of up to 570 consecutive calendar days, with no change to the contract amount.
I hereby certify that the foregoing resolution was adopted by the Public Utilities Commission at its meeting of March 26, 2024.
Secretary, Public Utilities Commission