City of Santa Rosa image CIP

Capital Improvement Project

Laguna Treatment Plant Disinfection Improvements Project

Estimated Construction Schedule: Slated to begin May, 2022 and is anticipated to be completed January, 2025.
Construction Contract Amount: $68,109,000
Project ID #: 284
Description: Ultraviolet light (UV) is the primary disinfection process for the City of Santa Rosa's Laguna Treatment Plant (LTP). The existing system was commissioned in 1998, has reached the end of its useful life, and no longer has the treatment capacity for peak wet weather sewer flows. This project will replace the existing UV system with a new UV system. Additionally, this project will install an effluent diversion pump station and pipeline to convey effluent to the beginning of the plant for retreatment. This provides greater flexibility for operations and regulatory compliance.

Bidding Documents Information: Information and Bidding Documents for this Project are posted on Planetbids. Please go to to download these documents thru PlanetBids.


Jason Roberts
Supervising Engineer
City of Santa Rosa

C00284 Bid Tabs
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Note: All dates and times are subject to change.