AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
DEPARTMENT: Infrastructure Division
AGENDA NUMBER: 15
MEETING DATE: October 13, 2026
Calendar: Regular Calendar
Project Manager: Mary Tienken
Approve Increase to the Duration Contingency for Contract No. WD-2840, Southern Skyline Boulevard Ridge Trail Extension
Summary of Proposed
Commission Action:
Approve an increase of 120 calendar days (approximately four months) to the existing duration contingency for Contract No. WD - 2840, Southern Skyline Boulevard Ridge Trail Extension , with Gordon N. Ball, Inc., for a revised duration limit of 1,055 consecutive calendar days (approximately two years and nine months), due to post-construction survey work , leading to a delay in completion of the contract work, with no change to the contract amount.
Background: The San Francisco Public Utility Commission (SFPUC) Water Enterprise requires construction services to enhance the existing Fifield-Cahill Ridge Trail and to create a new six -mile segment of Bay Area Ridge Trail - the Southern Skyline Boulevard Ridge Trail - through the interior of the Peninsula Watershed, south of California State Route (SR) 92.
On September 26, 2023, by Resolution No. 23 -0175, this Commission award ed Contract No. WD -2840, Southern Skyline Boulevard Ridge Trail , to Gordon Ball, Inc. The original contract amount was $20,523,445 and the original contract duration was 543 consecutive calendar days.
On January 9, 2024, by Resolution No. 24 -0006, this Commission approved an increase of $ 4,768,500 to the cost contingency for Contract No. W D-2840, Southern Skyline Boulevard Ridge Trail Extension, for a total cost limit of $27,344,289 , to include the construction of a two-mile long trail segment south of SR 92, trail drainage features, 50 -car parking lot, restroom, signage, and security improvements (WD-2840 bid additive alternatives), with no change to the contract duration.
On June 25, 2024, by Resolution No. 24-0144, this Commission approved an increase of 150 consecutive calendar days to the duration contingency for the non -compensable work approved by this Commission by Resolution No. 24 -0006, and for unforeseen environmental permitting, for a total duration limit of 747 calendar days (approximately two years and one month) , with no change to the contract amount.
Agenda Title: WD-2840, Southern Skyline Blvd. Ridge Trail Extension Commission Meeting Date: October 13, 2026
On January 13, 2026, by Resolution No. 26-0010, this Commission approved an increase of 188 calendar days to the existing duration contingency for Contract No. WD-2840, Southern Skyline Boulevard Ridge Trail Extension, due to concurrent hydroseeding, signage procurement and adverse weather delays, for a total duration limit of up to 935 calendar days, with no change to the contract amount.
Scope of Contract: The contract work is in two locations within the SFPUC’s Peninsula Watershed property in San Mateo County.
North of SR 92, along the existing Fifield-Cahill Ridge Trail, the base bid contract work consists of:
• Construction of a new 0.5 -mile-long universal access loop trail that provides access that is compliant with the
Americans with Disabilities Act, parking and trailhead
improvements.
• Construction of a 50-car parking lot.
South of SR 92 and east of SR 35, also known as Skyline Boulevard, the base bid contract work consists of:
• Construction of a new six-mile long ridge trail segment to be served by a new 20 -car parking lot and trailhead
improvements;
• Construction of wildlife -friendly security fe ncing and other security features; and
• Installation of a pedestrian bridge and interpretive signage.
Modifications to the
Contract:
Modification Nos. 1 through 14: Staff issued Modifications Nos. 1 through 14, increasing the contract amount by $ 4,984,954 and increasing the contract duration by 392 consecutive calendar days, within the original and approved cost and duration contingencies authorized under Resolution No s. 24-0006, No. 24-0144, and No. 26-0010, for the following: contract bid additive alternatives ; additional tree work ; additional erosion control blankets ; increased bid allowances; retaining wall modifications; drainage modifications at SR35 parking lot ; additional drain inlets at trail ; one additional signage kiosk ; miscellaneous trail security and maintenance features; hydroseeding; signage; and adverse weather delays; for a revised contract amount of $25, 508,399 and revised contract duration of 935 consecutive calendar days.
Proposed Increase to Duration Contingency: Staff recommends the Commission approve an increase of 120 calendar days to the existing duration contingency, for a revised duration limit of 1,055 calendar days, due to the 6-mile long post-construction survey necessary for the project as -built drawings, with no change to the contract amount.
Agenda Title: WD-2840, Southern Skyline Blvd. Ridge Trail Extension Commission Meeting Date: October 13, 2026
Funding and Costs: Funding Source: Project No. 10015113, Southern Skyline Boulevard Ridge Trail Extension
Original Contract Amount: $20,523,445
Original 10% Cost Contingency: $2,052,344
Approved Increase to Cost Contingency: $4,768,500
Modified Increases to Contract Amount: $4,984,954
Total Current Contract Amount: $25,508,399
Current Cost Contingency: $1,835,890
Additional Cost Contingency: $0
Total Contract Cost Limit: $27,344,289
Schedule: Notice-to-Proceed Date: January 8, 2024
Original Contract Duration: 543 consecutive calendar days Original 10% Duration Contingency: 54 calendar days
Approved Increases to Duration Contingency: 338 calendar days Modified Increases to Contract Duration: 392 calendar days Total Current Contract Duration: 935 consecutive calendar days Current Duration Contingency: 0 calendar days
[Proposed] Additional Duration Contingency: 120 calendar days Total [Proposed] Duration Limit: 1055 consecutive calendar days
Compliance with
Federal
Disadvantaged
Business Enterprise
Utilization and Non-
Discrimination in
Contracting
Ordinance:
The Contract Monitoring Division established a 2 3% Federal Disadvantages Business Enterprise (DBE) subcontracting goal for this contract. The contractor committed to 23.16% DBE
subcontractor participation with its bid submittal , and this amount remains unchanged.
Agenda Title: WD-2840, Southern Skyline Blvd. Ridge Trail Extension Commission Meeting Date: October 13, 2026
Location Map
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO. __________________
WHEREAS, The San Francisco Public Utilit ies Commission (SFPUC) Water Enterprise requires construction services to enhance the existing Fifield -Cahill Ridge Trail, and to create a new six-mile segment of Bay Area Ridge Trail - the Southern Skyline Boulevard Ridge Trail - through the interior of the Peninsula Watershed, south of California State Route (SR) 92; and
WHEREAS, On May 11, 2021, by Resolution No. 21 -0077, this Commission approved Project No. 10015113, Southern Skyline Boulevard Ridge Trail Extension Project (Project), and authorized Staff to proceed with implementing the Project, including advertising for construction bids; and
WHEREAS, On September 26, 2023, by Resolution No. 23 -0175, the SFPUC awarded Contract No. WD -2840, Southern Skyline Boulevard Ridge Trail Extension to Gordon Ball Inc.; and
WHEREAS, The original contract amount was for $ 20,523,445 and the original contract duration was 543 consecutive calendar days; and
WHEREAS, The contract Notice-to-Proceed date was January 8, 2024; and
WHEREAS, On January 9, 2024, by Resolution No. 24 -0006, the Commission approved an increase of $4,768,500 to the existing cost contingency for Contract No. WD- 2840, Southern Skyline Boulevard Ridge Trail Extension , for a new not to exceed cost limit of $27,344,289, to include the construction of a two-mile long trail segment south of SR 92, trail drainage features, 50 -car parking lot, restroom, signage, and security improvements, with no change to the contract duration; and
WHEREAS, On June 25, 2024, by Resolution No. 24 -0144, the Commission approved an increase of 150 calendar days to the existing duration contingency, for the non-compensable work approved by this Commission by Resolution No. 24 -0006, and for unforeseen envi ronmental permitting, for a new contract duration limit of up to 747 consecutive calendar days, with no change to the contract amount; and
WHEREAS, On January 13, 2026, by Resolution No. 26-0010, this Commission approved an increase of 188 calendar days to the existing duration contingency for Contract N o. WD -2840, Southern Skyline Boulevard Ridge Trail Extension, due to adverse weather delays, signage procurement and hydroseeding for a total duration contingency of up to 935 calendar days, with no change to the contract amount; and
WHEREAS, Staff issued Modifications Nos. 1 through 14, increasing the contract amount by $4,984,954 and the contract duration by 338 calendar days, within amounts authorized by Resolution Nos. 24-0006, 24-0144, and 26-0010, for the following: contract bid additive alternatives ; additional tree work ; additional erosion control blankets ; increased bid allowances ; retaining wall modifications ; drainage modifications at SR35 parking lot; additional drain inlets at trail; one additional signage kiosk; miscellaneous trail security and maintenance features; hydroseeding; adverse weather delays; and signage procurement; for a revised contract amount of $ 25,508,399, and with a revised duration limit of 935 consecutive calendar days; and
WHEREAS, Staff recommends the Commission approve an increase of 120 calendar days to the existing duration contingency, for a revised contract duration limit of 1,055 consecutive calendar days, due to a six-mile long post-construction survey that is necessary for the project as-built drawings, leading to a delay in completion of the contract work, with no change to the contract amount; and
WHEREAS, The Contract Monitoring Division established a 23% Federal Disadvantaged Business Enterprise (DBE) subcontracting goal for this contract , the contractor committed to 23.16% DBE subcontractor participation with its bid submittal , and this amount remains unchanged; and
WHEREAS, Funds are available from Project No. 10015113, Southern Skyline Boulevard Ridge Trail Extension; now, therefore, be it,
RESOLVED, That this Commission hereby approves an increase of 120 calendar days to the existing duration contingency for Contract No. WD -2840, Southern Skyline Boulevard Ridge Trail Extension, for a total duration contingency of 512 calendar days, with no change to the contract amount; and, be it,
FURTHER RESOLVED, That this Commission hereby authorizes the General Manager or the General Manager’s designee to consider and, if appropriate, to approve any future modifications to the contract duration for a total duration limit of 1,055 consecutive calendar days with no change to the contract amount.
I hereby certify that the foregoing resolution was adopted by the San Francisco Public Utilities Commission at its meeting of October 13, 2026.
__________________________________
Director of Commission Affairs
San Francisco Public Utilities Commission