DEPARTMENT
Infrastructure Division
AGENDA NO. 12
MEETING DATE
January 28, 2025
Last updated: 05.03.2023
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Regular Calendar
Project Manager: Derek Adams
Approve Increase to the Construction Cost and Duration Contingencies for Contract No.
WW-719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement
Summary of Proposed
Commission Action:
Approve an increase of $350,000 to the cost contingency and an increase of 140 calendar days to the duration contingency for Contract No. WW- 719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement , with Mitchell Engineering, for a revised cost limit of up to $8,624,245 and a revised duration limit to 697 consecutive calendar days (approximately one year and ten months), due to a safety work stoppage and investigation after the Contractor damaged the MUNI overhead catenary wires on 11th Street, multiple demobilizations and remobilizations to accommodate Special Event street fair closures on 11th Street, cost overruns on a brick sewer repair, and due to an unforeseen conflict with an unidentified drainage pipe, with no change to the locations or alignments of work.
Background: The low -lying Inner Mission neighborhood surrounding 17 th, 18 th and Folsom Streets historically has been subject to flooding during moderate to heavy storms. The Folsom Area Stormwater Improvements Project will increase collection system capacity and reduce the risk of flooding by constructing and upsizing sewer pipes and boxes, as well as constructing a new stormwater tunnel. The San Francisco Public Utilities Commission (SFPUC) will implement the project through four separate contracts, the first of which is this Contract No. WW-719A, Folsom Area Stormwater Improvements –
SOMA and Mission Districts Sewer
Replacement.
On May 9, 2023, by Resolution No. 23-0096, this Commission awarded the contract to Mitchell Engineering , in the amount of $7,522,041 and with a duration of 365 consecutive calendar days.
On September 26, 2023, by Resolution No. 23-0177, this Commission corrected Resolution No. 23-0096 as to the contract duration to add 60 Agenda Title: WW-719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement Commission Meeting Date: January 28, 2025
consecutive calendar days to Final Completion that was accidentally omitted, for a total contract duration of 425 consecutive calendar days.
On May 28, 2024, by Resolution No. 24-0122, this Commission approved an increase of 90 calendar days to the duration contingency, for a total duration limit of up to 557 consecutive calendar days , due to the discovery of unforeseen conflicts in the field.
Scope of Contract: The contract work location(s) are in various locations around the SOMA and Mission Districts in San Francisco, CA, with major work on Folsom Street, 11th Street, Alabama Street, Mistral Street, Erie Street, and 19 th Street.
The contract work consists of:
• Upsizing existing sewers;
• Replacing sewer laterals and associated appurtenances; • Replacing existing sewer manholes; and
• Installing new sewer manholes.
Modifications to the
Contract:
Modification 1 : Effective September 26, 2023, in accordance with Resolution No. 23-0177, the SFPUC issued Modification 1 to include the 60-calendar day duration of Final Completion, which was accidentally omitted from the original contract award resolution , with no change to the contract amount.
Modification 2: Effective May 28, 2024, in accordance with Resolution No. 24-0122, the SFPUC issued Modification 2 to increase the contract duration by 90 consecutive calendar days, due to unforeseen field conditions with a conflicting 3rd party facility and delays in construction submittals/procurement, for a total contract duration of 515 consecutive calendar days.
Recommended Increase to Contract Cost and Duration
Contingency: Staff recommends the Commission approve an increase to the cost contingency by $350,000 and an increase to the duration contingency by 140 calendar days , due to an extended safety work stoppage and investigation after the Contractor damaged the MUNI overhead catenary wires on 11 th Street, multiple demobilizations and remobilizations to accommodate Special Event street fair closures on 11th Street, cost overruns on a brick sewer repair, and due to a n unforeseen conflict with an unidentified drainage pipe , with no change to the locations or alignments of work, for a new cost limit up to $8,624,245 and a new duration limit up to 697 consecutive calendar days.
Agenda Title: WW-719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement Commission Meeting Date: January 28, 2025
Funding and Costs: Funding Source: Project No. 10038471 , Folsom Area Stormwater Improvements Project Phase 2
Original Contract Amount: $7,522,041
Original 10% Cost Contingency Amount: $752,204.10
Requested Additional Cost Contingency Amount: $350,000
Total Cost Limit: $8,624,245.10
Schedule: Notice-to-Proceed Date: August 7, 2023
Original Contract Duration: 365 consecutive calendar days Corrected Contract Duration: 425 consecutive calendar days Original 10% Duration Contingency: 42 calendar days
Approved Increase to Duration Contingency: 90 calendar days Modification 2 Increase to Contract Duration: 90 calendar days (total contract duration of 515 total calendar days)
Remaining Duration Contingency: 42 calendar days
Requested Additional Duration Contingency: 140 calendar days Total Revised Duration Limit: 697 consecutive calendar days
Local Business
Enterprise
Participation and
Non-Discrimination
In Contracting:
The Contract Monitoring Division established a 20.00% Local Business Enterprise (LBE) subcontracting requirement for this contract. The contractor committed to a 21.39% LBE subcontractor participation with its bid submittal.
Agenda Title: WW-719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement Commission Meeting Date: January 28, 2025
Overview of All Folsom Project Construction Contracts
Agenda Title: WW-719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement Commission Meeting Date: January 28, 2025
WW-719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
WHEREAS, The San Francisco Public Utilities Commission (SFPUC) is addressing the low-lying Inner Mission neighborhood surrounding 17th, 18th, and Folsom Streets that historically has been subject to flooding during moderate to heavy storms. The Folsom Area Stormwater Improvements Project will increase collection system conveyance capacity and reduce the risk of flooding by constructing and upsizing sewer pipes and boxes, as well as constructing a new stormwater tunnel. The SFPUC will implement the project through four separate contracts, the first of which is Contract No. WW -719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement; and
WHEREAS, On May 9, 2023, by Resolution No. 23- 0096, the Commission awarded Contract No. WW-719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement to Mitchell Engineering; and
WHEREAS, The original contract amount was for $7,522,041 and the original contract duration was 425 consecutive calendar days; and
WHEREAS, The contract Notice-to-Proceed date was August 7, 2023; and
WHEREAS, On September 26, 2023, by Resolution No. 23- 0177, the Commission corrected the contract duration to add 60 consecutive calendar days to Final Completion that was accidentally omitted, for a total contract duration of 425 consecutive calendar days; and
WHEREAS, On May 28, 2024, by Resolution No. 24-0122, the Commission approved an increase in the duration contingency of 90 consecutive calendar da ys, due to the discovery of unforeseen conflicts in the field, for a total duration contingency of 132 consecutive calendar days, and for a total contract duration limit of up to 557 consecutive calendar days; and
WHEREAS, Staff recommends an increase to the cost contingency of $350,000 and an increase to the duration contingency of 140 calendar days due to an extended safety work stoppage and investigation after the Contractor damaged the MUNI overhead catenary wires on 11th Street, multiple demobilizations and remobilizations to accommodate Special Event street fair closures on 11th Street, cost overruns on a brick sewer repair, and due to an unforeseen conflict with an unidentified drainage pipe, with no change to the locations or alignments of work, for a new cost limit of up to $8,624,245.10 and a new duration limit of up to 697 consecutive calendar days; and
WHEREAS, The Contract Monitoring Division established a Local Business Enterprise (LBE) subcontracting participation of 20.00% for this contract, and the contractor committed to an LBE subcontractor participation of 21.39% with its bid submittal; and
WHEREAS, Funds are available from Project No. 10038471, Folsom Area Stormwater Improvements Project Phase 2; now, therefore, be it
RESOLVED, That this Commission hereby approves an increase of $350,000 to the existing cost contingency and an increase of 140 calendar days to the existing duration contingency for Contract No. WW -719A, Folsom Area Stormwater Improvements – SOMA and Mission Districts Sewer Replacement, with Mitchell Engineering, Inc., for a total cost contingency of up to $1,102,204 and a total duration contingency of 182 calendar days, for a revised cost limit of up to $8,624,245 and a revised duration limit of up to 697 consecutive calendar days.
I hereby certify that the foregoing resolution was adopted by the San Francisco Public Utilities Commission at its meeting of January 28, 2025.
Director of Commission Affairs
San Francisco Public Utilities Commission