DEPARTMENT Hetch Hetchy Water and Power
AGENDA NO.
7f
MEETING DATE
May 28, 2024
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Consent Calendar
Contract Manager: Edward Allen
Accept Closeout and Authorize Final Payment for Contract No. HH-1007, Transmission Line 7/8 Upgrades
Summary of
Proposed
Commission Action:
Accept work performed by Wilson Utility Construction Company under Contract No. HH-1007, Transmission Line 7/8 Upgrades , for a total contract amount of $ 24,197,640 and a total contract duration of 617 consecutive calendar days; and authorize final payment to contractor.
Background: The San Francisco Public Utilities Commission (SFPUC) Hetch Hetchy Water and Power has been working on an approved mitigation project to reconductor Warnerville to Standiford 115 kV Transmission Lines 7/8. The project was necessary to mitigate the impacts to the City’s electric system, specifically Transmission Lines 7/8, caused by the interconnection of electric generating projects to the electric grid.
The objective of the project was to upgrade existing conductors and modify existing towers along Transmi ssion Line 7/8 to accommodate additional transmission power flows . The work was performed in Stanislaus County, California. There are hundreds of proposed electric generating projects that seek to interconnect with the electric transmission system controlled by the California Independent System Operator (CAISO). The CAISO studies the proposed projects in groups, called “Clusters ,” to identify the impacts of the projects on the electrical grid.
Scope of Contract: The contract work location extended from Warnerville Substation located in Oakdale, CA to Modesto Irrigation District Standiford Switchyard located in Modesto, CA.
The contract work consisted of the following:
• Reconductored approximately 12.5 miles, 2-circuit (Line 7/8), 3-phase (1 wire / phase), 115kV power transmission lines from the Warnerville Substation to the MID Standiford Substation. R eplaced all insulators, hardware, and all ancillary items per project plans and specifications. • Developed, implemented , and maint ained Stormwater Pollution Prevention Protection (SWPPP) and Erosion/Sediment Control. • Modified structural concrete to tower foundations as indicated in the Contract Documents.
Agenda Title: HH-1007, Transmission Line 7/8 Upgrades
Commission Meeting Date: May 28, 2024
• Structurally retrofitted and repaired specified towers. • Modified towers to raise upper portion of towers to heights of either 9’ or 16’ at select locations.
• Provided access to all transmission towers, including gravel road grading or road stabilization, temporary bridging or matting, protection of existing underground or overhead utilities, and temporary protection or relocation of existing drainage or irrigation ditches.
• Provided traffic control, temporary facilities, general conditions, supervision, and all other temporary items to pro perly execute the work.
• Provided temporary guard structures to support the removal of conductors and installation of new conductors across roadways, railways, bike paths, irrigation ditches, and other public or private facilities that may cross the City’s right of way (ROW) alignment. • Restored s ite back to pre- existing conditions utilizing hydroseeding and hand broadcast seeding where applicable.
Modifications to the
Contract:
Modification Nos. 1-11: The SFPUC modified the contract amount within the approved contingency by $217,499, for a new total contract amount of $24,197,640, and decreased the contract time by 51 consecutive calendar days for a new total contract time of 617 consecutive calendar days.
Funding and Costs: Funding Source: Hetch Hetchy Water & Power’s 10 -Year Capital Improvement Program Project No. 10035721 T ransmission Line 7/8 Upgrades and mitigation funding from Project No. 10030761 UH Cluster 7 Mitigation.
Funding includes capital program bond funding and mitigation payments from renewable generation developers.
Original Contract Amount: $23,980,141
Total Final Modifications (Nos. 01 - 11): $217,499
Total Final Contract Amount: $24,197,640
Schedule: Notice-to-Proceed Date: September 28, 2022
Original Contract Duration: 668 consecutive calendar days Approved Decrease to Duration: 51 consecutive calendar days Total Revised Contract Duration Limit: 617 consecutive calendar days
Local Business
Enterprise
Participation and
Non-Discrimination
in Contracting:
The Contract Monitoring Division established a 10% Local Business Enterprise (LBE) subcontracting requirement for this contract. The contractor committed to 15.22% LBE participation with its bid submittal. CMD has determined the contractor complied with the LBE subcontracting requirements by achieving a final LBE subcontracting participation of
24.21%.
Agenda Title: HH-1007, Transmission Line 7/8 Upgrades
Commission Meeting Date: May 28, 2024
Attachments: 1. Contract Monitoring Division Memorandum
2. Project Site Map
Agenda Title: HH-1007, Transmission Line 7/8 Upgrades
Commission Meeting Date: May 28, 2024
Agenda Title: HH-1007, Transmission Line 7/8 Upgrades
Commission Meeting Date: May 28, 2024
Agenda Title: HH-1007, Transmission Line 7/8 Upgrades
Commission Meeting Date: May 28, 2024
Attachment 1: Project Site Map
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
WHEREAS, On June 28, 2022, by Resolution No. 22- 0127, the San Francisco Public Utilities Commission (SFPUC) awarded Contract No. HH-1007, Transmission Line 7/8 Upgrades Project, to Wilson Utility Construction Company, (“Wilson”), to upgrade existing conductors and modify existing towers along Transmission Line 7/8 (in Stanislaus County) to accommodate additional transmission power flows to mitigate the impacts to the City's electric system; and
WHEREAS, On September 28, 2022, the SFPUC issued the construction Contract notice- to-proceed; and
WHEREAS, The original Contract amount was for $23,980,140 and the original Contract duration was 668 consecutive calendar days; and
WHEREAS, Modification Nos. 1-11 increased the contract amount by $217,499, for a total contract amount of $24,197,640, and decreased the contract time by 51 consecutive calendar days for a new total contract time of 617 consecutive calendar days; and WHEREAS, The contractor , Wilson Utility Construction Com pany, has completed its work under Contract No. HH-1007, Transmission Line 7/8 Upgrades Project; and WHEREAS, The Contract Monitoring Division (CMD) established a 10% Local Business Enterprise (LBE) subcontracting requirement for this contract, Wilson committed to 15.22% LBE participation in its bid submittal, and Wilson achieved 24.21% LBE participation; and WHEREAS, Funds are available from Project No. 10035721, Transmission Line 7/8 Upgrades and mitigation funding from Project No. 10030761 UH Cluster 7 Mitigation; now, therefore, be it
RESOLVED, That this Commission hereby accepts the work performed by Wilson Utility Construction Company under Contract No. HH-1007 for a total contract amount of $24,197,640, and a total contract duration of 617 consecutive calendar days; and authorizes final payment to the contractor.
I hereby certify that the foregoing resolution was adopted by the P ublic Utilities Commission at its meeting of May 28, 2024
Secretary, Public Utilities Commission