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San Geronimo Treatment Plant Emergency Generator Project

Construction Update

Marin Water installed permanent emergency generators at the District's San Geronimo Treatment Plant. The project, which included grading, drainage, concrete slab work and a retaining wall, ensures the treatment plant can treat and deliver water during PG&E Public Safety Power Shutoffs and other unforeseen power outages. 

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This critical project also included modifications to electrical and communications systems, so that the backup generators are ready to bring online at a moment's notice. Completed in September 2022, the San Geronimo Treatment Plant Emergency Generator Project is part of the District's broader effort to create resilient water treatment and delivery systems for our customers. 

Contact Information

San Geronimo Treatment Plant Emergency Generator Project:
  • Phone: Marin Water Construction Management team, 415-945-1560

Project San Geronimo Treatment Plant Emergency Generator Project 
Program A1A04 Replacements ‐ Treatment Facilities 
Project Number D19027
Contact Zak Talbott | ZTalbott@marinwater.org 
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Map of the San Geronimo Treatment Plan located between Sir Francis Drake Blvd and San Geronimo Valley Drive
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Three generators on a concrete slab

Project Description 

Furnish and install permanent emergency generator sets including grading, drainage, concrete slab work and retaining wall, modifications to existing electrical and communication systems, new electrical service, new switchgear, new automatic transfer switch, related electrical conduit and conductors, lighting, fuel system, power system studies and acceptance testing. 

Benefits

The San Geronimo Treatment Plant Emergency Generator Project will provide emergency power for the San Geronimo Treatment Plant and to ensure the District’s continued ability to produce and supply water to its customers despite losing electrical service when PG&E shuts off power during a Public Safety Power Shut-off (PSPS) event and during any other unforeseen PG&E power outages. 

Schedule and Status

Design: Fall 2019 - Fall 2020

Construction: Fall 2020 - Spring 2023

Expenditure Schedule

Actuals Through 
FY 22 (Rounded) 
FY 23 
Estimate 
Total
$5,593,000
$550,000
$6,143,000

Funding Sources 

Capital Maintenance Fund 
Other Funding Sources 
Total
$5,143,000
*$1,000,000
$6,143,000

*$1 million appropriation for Marin Water's emergency generator project was included in AB-178 (State Budget Act of 2022) which was signed by the Governer on June 20, 2022. The funds are still to be allocated to the District by the State Department of Water Resources.