DEPARTMENT
Infrastructure
AGENDA NO. 6f
MEETING DATE
June 25, 2024
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Consent Calendar
Project Manager: Aileen Caylao
Approve Increase to the Duration and Amount Contingencies for Contract No. WW-705, Various Locations Sewer Replacement No. 10
Summary of
Proposed
Commission Action:
Approve an increase of 90 calendar days to the duration contingency and increase of $ 200,000 to the amount contingency for Contract No. WW-705, Various Locations Sewer Replacement No. 10, with Mitchell Engineering, for a revised construction duration limit of up to 660 consecutive calendar days (approximately one year and ten months) and a revised contract amount up to $5,413,494, due to differing site conditions resulting in a scope change from open cut pipeline replacement to trenchless construction method 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 existing 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, 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 original contract duration was 350 consecutive calendar days.
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 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.
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; Agenda Title: WW-705, Various Locations Sewer Replacement No. 10 Commission Meeting Date: June 25, 2024
• South Van Ness Avenue from 18th Street to 19th Street; and • Bosworth Street from Lippard Avenue to Hammerton Avenue.
The original contract work consists of:
• Replacing existing main sewers with approximately 435 linear feet of 12-inch diameter, 830 linear 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;
• Sliplining 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:
Recommend Increase to Duration and Amount Contingencies: Staff recommends the Commission approve an increase to the contract duration contingency by 90 calendar days for a revised construction duration limit up to 660 consecutive calendar days and an increase of $ 200,000 to the contract amount contingency for a revised contract amount up to $5,413,494 due to differing site conditions that resulted in a scope change from open cut pipeline replacement to trenchless construction method on Golden Gate Avenue.
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: $200,000
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
Approved Increase to Duration Contingency: 185 calendar days Requested Additional Duration Contingency: 90 calendar days Total Revised Construction Duration Limit: 660 consecutive calendar days
Environmental
Review:
On July 21, 2021 , the San Francisco Planning Department determined the Project to be statutorily exempt f rom environmental review under the California Environmental Quality Act (CEQA) s ection 21080.21 and the CEQA Guidelines s ection 15282(k) (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 exemption can be found here:
https://sfpuc.sharefile.com/d-sa609b8cd143148c28709d850d12bd491
Local Business
Enterprise
Participation and
The Contract Monitoring Division established a 10% Local Business Enterprise subcontracting requirement for this contract. The contractor’s bid committed to 10.39% Local Business Enterprise participation.
Agenda Title: WW-705, Various Locations Sewer Replacement No. 10 Commission Meeting Date: June 25, 2024
Project Location Map
Non-Discrimination
in Contracting:
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 of up to 570 consecutive calendar days, with no change to the contract amount or amount contingency; and WHEREAS, Staff recommends an increase of 90 calendar days to the duration contingency and an increase of $ 200,000 to the contract amount contingency due to differing site conditions resulting in a scope change from open cut pipeline replacement to trenchless construction method on Golden Gate Avenue, for a revised construction duration limit up to 660 consecutive calendar days and a revised contract amount up to $5,413,494; and WHEREAS, C ontract Monitoring Division established a Local Business Enterprise subcontracting participation of 10% for this contract, and the contractor’s bid committed to 10.39% Local Business Enterprise participation; and
WHEREAS, On July 21, 2021, the San Francisco Planning Department determined the Project to be statutorily exempt from environmental review under the California Environmental Quality Act (CEQA) s ection 21080.21 and the CEQA Guidelines s ection 15282(k) (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
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 90 calendar days to the duration contingency and a n increase of $200,000 to the cost contingency for Contract No.
WW-705, Various Locations Sewer Replacement No. 10, for a total duration contingency of up to 310 calendar days and a total cost contingency of up to $673,954, for possible modification of the contract up to 660 consecutive calendar days in duration and up to $5,413,494 in amount.
I hereby certify that the foregoing resolution was adopted by the Public Utilities Commission at its meeting of June 25, 2024.
Acting Commission Secretary, Public Utilities Commission