DEPARTMENT
Infrastructure Division
AGENDA NO.
10g
MEETING DATE
August 23, 2022
APPROVAL:
COMMISSION
SECRETARY
Donna Hood
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Construction Modification: Consent Calendar
Contract Manager: Ada Zhu
Approve Increase to Construction Contract Duration Contingency for WD-2861, Auxiliary Water Supply System Clarendon Supply 2019
Summary of Proposed
Commission Action:
Approve an increase of 280 consecutive calendar days to the contract duration contingency for Contract No. WD-2861, Auxiliary Water Supply System Clarendon Supply 2019, with Mitchell Engineering; and authorize the General Manager to approve future modifications to the contract for a total contract duration of up to 879 consecutive calendar days (approximately two years and five months), with no change to contract amount.
Background: The City and County of San Francisco’s Emergency Firefighting Water System (EFWS) includes several methods of delivering water to suppress fires during emergency situations. The EFWS is vital for protecting against the loss of life, homes, and businesses from fire s following an earthquake and from non-earthquake multiple-alarm fires.
One EFWS component is a high- pressure fire- suppression water system, formerly known as Auxiliary Water Supply System (AWSS), which was originally built in the decade following the catastrophic 1906 San Francisco earthquake. It consists of a resilient 135- mile high - pressure pipeline network, a high elevation reservoir, two large capacity tanks, two high-pressure seawater pumping stations, and manifolds that allow fireboats to inject Bay water into the City’s EFWS pipelines. This contract still utilizes the term “AWSS” and will be one of the final ones to do so, as the City continues to transition to the term “EFWS.”
Previous studies concluded that insufficient water flow and pressure from the existing EFWS w ould be available in western San Francisco following a major seismic event. The Auxiliary Water Supply System Clarendon Supply 2019 Project provides an additional 16,000 gallons per minute of water supply to improve the City’s post-seismic event fire suppression capabilities, particularly for the western area of San Francisco.
Contract: WD-2861, Auxiliary Water Supply System Clarendon Supply 2019 Commission Meeting Date: August 23, 2022
Since the award of the contract, the AWSS has been re -named the “Emergency Firefighting Water System” or EFWS.
On September 8, 2020, by Resolution No. 20- 0193, this Commission awarded Contract No. WD -2861, Auxiliary Water Supply System Clarendon Supply 2019. The original contract amount was $2,685,720, and the original contract duration was 327 consecutive calendar days.
Description of Scope of
Work:
The Contract work is located primarily at Clarendon Avenue and Dellbrook Avenue, with minor work at nearby locations in San Francisco.
The contract work consists of:
• Excavation, trenching, backfill, compaction, and pavement restoration.
• Site clearing and grubbing, removal of vegetation and existing trees.
• Furnishing and installing cage enclosure and foundation, bollards, concrete pavement, and curb ramps.
• Furnishing and installing concrete pad and access cover for gate valve, concrete pad for check and isolation valves, and thrust blocks.
• Furnishing and installing EFWS and potable water
pipelines, new valves, and other appurtenances.
• Providing an above-ground pipe segment between the
potable and non-potable pipes, to be installed only during major fire events.
• Providing underground power conduit and conductors to flowmeters and pressure indicating transmitters.
• Providing underground instrumentation and control (I&C) conduits for analog signal wiring to flowmeters and
pressure indicating transmitters.
• Providing cathodic protection and mechanical joint
bonding to the pipelines.
Changes and
Modifications to the
Contract:
San Francisco Administrative Code section 6.22(h) requires that any cumulative increase of the contract amount or duration in excess of 10% of the original contract amount or duration be approved by this Commission.
On December 14, 2021, by Resolution No. 21- 0186, this Commission approved an increase of 240 calendar days to the contract duration contingency for a total contract duration of up to 599 consecutive calendar days, with no change to the contract amount.
Modifications Nos. 1 to 4 increased the contract amount by $15,361 (within the original contingency) to add a required survey for tree Contract: WD-2861, Auxiliary Water Supply System Clarendon Supply 2019 Commission Meeting Date: August 23, 2022
removal, a modification to the control panel as requested by City Distribution Division, and Supervisory Control and Data Acquisition (SCADA) system scope reduction, for a total contract amount of $2,701,081, and increased the contract duration by 266 calendar days (in accordance with Resolution No. 21- 0186) due to a
tree removal
hearing, for a total contract duration of 593 calendar days.
Requested Increase to Contract Duration Contingency
Staff requests approval of a n increase of 280 calendar days to the existing contract duration contingency due to delay s in delivery of necessary valves and actuators caused by supply chain issues, for a total contract duration of up to 879 consecutive calendar days, with no change to the contract amount.
Budget & Costs: Funding: Project No. 10029695, Clarendon Supply (ESER 2014) Original Contract Amount: $2,685,720
Original 10% Cost Contingency: $ 268,572
Total Contract Cost Limit: $2,954,292
Schedule: Notice-to-Proceed Date: February 1, 2021
Original Contract Duration: 327 consecutive calendar days Original 10% Duration Contingency: 32 consecutive calendar days Approved Duration Contingency Increase: 240 consecutive calendar days
Requested Additional Duration Contingency Increase: 280 consecutive calendar days
Total Revised Contract Duration Limit : 879 consecutive calendar days
Compliance with
Chapter 14B: Local
Business Enterprise
Utilization and Non-
Discrimination In
Contracting Ordinance:
The Contract Monitoring Division established a Local Business Enterprise (LBE) subcontracting requirement of 10% for this contract.
The contractor committed to a LBE participation of 18.39% with its bid submittal.
Recommendation: San Francisco Public Utilities Commission staff recommends that the Commission adopt the attached resolution.
Contract: WD-2861, Auxiliary Water Supply System Clarendon Supply 2019 Commission Meeting Date: August 23, 2022
Project Site Map
Contract: WD-2861, Auxiliary Water Supply System Clarendon Supply 2019 Commission Meeting Date: August 23, 2022
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
WHEREAS, On September 8, 2020, by Resolution No. 20-0193, this Commission awarded Contract No. WD-2861, Auxiliary Water Supply System Clarendon Supply 2019 to Mitchell Engineering, and
WHEREAS, On February 1, 2021, SFPUC issued the construction cont ract Notice -to- Proceed (NTP); and
WHEREAS, The original contract amount was for $2,685,720 and the original contract duration was for 327 consecutive calendar days; and
WHEREAS, San Francisco Administrative section 6.22(h) requires Commission approval for any cumulative increase in contract amount or duration in excess of 10% of the original contract amount or duration; and
WHEREAS, On December 14, 2021, by Resolution No. 21- 0186, this Commission approved an increase of 240 calendar days to the contract duration contingency for a total contract duration limit of up to 599 consecutive calendar days, with no change to the contract amount; and WHEREAS, Staff req uests a n increase of 280 calendar days to the contract duration contingency to account for delays in acquisition of materials due to supply chain issues; and WHEREAS, Contract Monitoring Division established a Local Business Enterprise (LBE) subcontracting participation requirement of 10% for this contract, and the contractor committed to LBE participation of 18.39% in its bid submittal; and
WHEREAS, Funds are available from Project No. 10029695, Clarendon Supply (ESER 2014); now, therefore, be it
RESOLVED, That this Commission hereby approves an increase of 280 calendar days to the existing contract duration contingency for Contract No. WD -2861, Auxiliary Water Supply System Clarendon Supply 2019, for a total contract duration contingency of 552 consecutive calendar days, with no change to the contract amount; and be it FURTHER RESOLVED, That this Commission hereby authorizes the General Manager , or his designee, to consider and, if appropriate, to approve any future modifications to the contract duration for a total contract duration of up to 879 consecutive calendar days, with no change to the contract amount.
I hereby certify that the foregoing resolution was adopted by the Public Utilities Commission at its meeting of August 23, 2022.
Secretary, Public Utilities Commission