Project: 830170 - Refurbishment of Water Tanks
Project Description/Scope/Purpose:
This project will refurbish one 5.0 MG storage tank at Wolfe-Evelyn. A structural and coating evaluation study performed in 2014 found the tank to be in poor condition. Comprehensive tank refurbishment may include: interior recoating, cathodic protection improvements, foundation seismic restrainers, flex coupling adapters, repairs to the overflow moat, and other necessary improvements. In addition, improvements identified by the State Water Resources Control Board are: exterior recoating of the San Lucar tank, fall protection systems at 9 tanks, and modifications of roof vents at 8 storage facilities. The fall protection systems will include the redesign or the elimination of vertical access ladders to be replaced with spiral staircases around all the tanks. The staircases, roof vents along with the Wolfe-Evelyn tank recoating will be designed in FY 2020/21. Project constuction will be scheduled in 2022.
Refurbishing tanks is more cost-efficient than replacement. Proper coating should keep the tanks in useable condition for up to 40 additional years. Wolfe-Evelyn tank is used to store San Francisco Public Utilities Commission (SFPUC) water to be used during peak days demands or in the event of a fire. Construction activities are usually limited to the winter months when water demand is lowest.
Fiscal Impact:
This project is funded by the Water Supply and Distribution Fund revenues. This project will result in reduction of ongoing maintenance costs associated with old infrastructure.
Project Type: Water
Year Identified: 2014
Est. Completion Year: 2022/23
This is a critical project to comply with State Water Resources Control Board requirements for water tanks. Additionally, it is referenced in the City's Water Utility Master Plan Chapter 8.
Project Evaluation and Analysis:
Category: Infrastructure
Project Coordinator: Mansour Nasser
Department: C95 - Environmental Services
Fund - Sub-Fund: 460-300 - Water Supply and Distribution - Water Infrastructure Subfund
Funding Sources:
Water Supply and Distribution Fund
Plans and Goals:
Project Phase: Underway
Project Manager: Chelsea Laxa
EM - Environmental Management - EM-4: Adequate Water Quality EM - Environmental Management - EM-3: Reliable and Safe Water Distribution Report to Council Number: Service Cluster Environment & Sustainability Interdependency 1
Interdependency 2
Interdependency 3
Interdependency 4
Project Approved Status: Funded Project Origin: Staff
Future Infrastructure Costs o Prevent Inflation o
Gas Tax Eligible o Park Dedication Eligible o
Technology Component o Project Administration þ
Art in Public Places Eligible o Meets Capitalization Threshold þ Art in Private Development Required o No Carryover þ
IT Steering Committee o
Project Financial Summary
20 Year Total
Grand Total
Prior Actual
2019 - 20
Operating CostsProject Costs
2,741,537
Revenues
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Transfers In
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4,042,803
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Attachment 2