DEPARTMENT
Infrastructure Division
AGENDA NO. 12
MEETING DATE
January 13, 2026
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
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 188 calendar days to the duration contingency for Co ntract No. WD-2840, Southern Skyline Boulevard Ridge Trail Extension, with Gordon N. Ball, Inc., for a revised duration limit of 935 calendar days (approximately two years and seven months), due to adverse weather conditions that delayed hydroseeding, leading to a forecast delay in completion of the contract work, with no change to the contract amount.
Background: The San Francisco Public Utilities Commission (SFPUC) Water Enterprise is building the Southern Skyline Blvd Ridge Trail Extension.
The purpose of this project is 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 approved the award of Contract No. WD -2840, Southern Skyline Boulevard Ridge Trail Extension to Gordon N. 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. WD-2840, Southern Skyline Boulevard Ridge Trail Extension, for a total cost limit of $27,344,289, with no change to the contract duration, to include the construction of a two-mile-long trail segment south of SR 92, trail drainage features , a 50-car parking lot, restroom s, and signage along with security improvements (WD-2840 bid additive alternatives).
On June 25, 2024, by Resolution No. 24-0144, this Commission approved an increase of 150 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).
Agenda Title: WD-2840, Southern Skyline Boulevard Ridge Trail Commission Meeting Date: January 13, 2026
Scope of Contract: The c ontract work is within Peninsula Watershed property in two locations:
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 is compliant with the Americans with Disabilities Act;
• Parking and trailhead improvements; and,
• 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 fencing and other security features; and,
• Installation of a pedestrian bridge and interpretive signage.
Modifications to the
Contract:
Modification Nos . 1 thr ough 11: Staff issued Modification Nos . 1 through 11, increasing the contract amount by $5,132,068 and increasing the contract duration by 173 consecutive calendar days, within the original and approved cost and duration contingencies a uthorized under Resolution Nos. 24-0006 and 24-0144, for Contract No. WD-2840 bid additive alternatives, additional tree work, additional erosion control blankets, increased bid allowances, retaining wall modifications, drainage modifications at the SR 35 parking lot, additional drain inlets at the trail, one additional signage kiosk, miscellaneous trail security and maintenance features, and adverse weather delays, for a revised contract amount of $25,655,513 and revised contract duration of 716 consecutive calendar days.
Proposed Increase to Duration Contingency : Staff recommends the Commission approve an increase of 188 calendar days to the existing duration contingency, due to delays from year-round, ridge top cloud condensation along Skyline Boulevard that caused fog drip which delayed soil compaction earthwork activities resulting in late hydroseeding, and leading to a forecast delay in completion of the contract work, for a revised duration limit of 935 calendar days, with no change to the contract amount.
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: $5,132,068
Agenda Title: WD-2840, Southern Skyline Boulevard Ridge Trail Commission Meeting Date: January 13, 2026
Total Current Contract Amount: $25,655,513
Current Cost Contingency: $1,688,776
Requested Additional Cost Contingency: $0
Total 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 Increase to Duration Contingency: 150 calendar days Modified Increases to the Contract Duration: 173 calendar days Total Current Contract Duration: 716 consecutive calendar days Current Duration Contingency: 31 calendar days
Requested Additional Duration Contingency: 188 calendar days [Proposed] Total Revised Duration Limit: 935 calendar days
Compliance with
Federal
Disadvantaged
Business Enterprise
Utilization and Non-
Discrimination in
Contracting
Ordinance:
The Contract Monitoring Division (CMD) established a 23 % Federal Disadvantaged Business Enterprise (D BE) subcontracting goal for this contract.
The contractor committed to 23.15% DBE subcontractor participation with its bid submittal, and this remains unchanged.
Agenda Title: WD-2840, Southern Skyline Boulevard Ridge Trail Commission Meeting Date: January 13, 2026
Location Map
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
WHEREAS, S an Francisco Public Utilities Commission (SFPUC) staff developed a project under the Water Enterprise 10 -year Capital Improvement Program for certain improvements to the R egional Water System, including the Southern Skyline Blvd Ridge Trail Extension; 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 N. 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 cost limit of $27,344,289, with no change to the contract duration, to include the construction of a two-mile-long trail segment south of SR 92, trail drainage features , a 50-car parking lot, restroom s, and signage along with security improvements; 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 environmental permitting, for a new contract duration limit of up to 747 consecutive calendar days, with no change to the contract amount; and
WHEREAS, Staff Issued Modification Nos. 1 through 11, increasing the contract amount by $5,132,068 and the contract duration by 173 calendar days , within amounts authorized by Resolution Nos. 24-0006 and 24- 0144, for Contract No. WD -2840 bid additive alternatives, additional tree work, additional erosion control blankets, increased bid allowances, retaining wall modifications, drainage modifications at the SR 35 parking lot, additional drain inlets at the trail, one additional signage kiosk, miscellaneous trail security and maintenance features , and adverse weather delays , for a revised contract amount of $25,655,513, and a revised duration of 716 consecutive calendar days; and
WHEREAS, Staff recommends the Commission approve an increase of 188 calendar days to the existing duration contingency, for a revised duration limit of 935 calendar days, due to adverse weather conditions that delayed hydroseeding,
leading to a forecast 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
23.15% DBE subcontractor participation in its bid submittal, and this 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 188 calendar days to the existing duration contingency for Contract No. WD-2840, Southern Skyline Boulevard Ridge Trail Extension , for a total duration contingency of 392 calendar days, with no change to the contract amount; and,
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, up to a total duration limit of 935 calendar days.
I hereby certify that the foregoing resolution was adopted by the San Francisco Public Utilities Commission at its meeting of January 13, 2026.
Director of Commission Affairs
San Francisco Public Utilities Commission