Section 401 Water Quality Certification Public Notice
North Marin Line Stabilization Project
The San Francisco Regional Water Quality Control Board is currently reviewing an application for the following project for water quality certification under Section 401 of the Clean Water Act. We encourage public comments on the proposed work, which will be considered in the decision on certification. You may submit comments on this project to the staff member below.
| Project Name: |
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| City/County: |
City of Petaluma, Sonoma County | |
| Comment Period: |
11/09/2026 - 11/30/2026 | |
| Project Description: |
"The City of Petaluma proposes flood preparedness work at Thompson Creek - Reach 2 and Holm Road Ditch. Accumulated sediment, excessive vegetation, and blocked stormwater outfalls reduce drainage conveyance and increase flood risks to nearby properties and infrastructure. Blocked outfalls at Thompson Creek have contributed to nearly annual neighborhood flooding. The Holm Road area has flooded repeatedly over the past 15 years, most recently in 2025. Timely work is needed to restore conveyance before significant storms during the 2026-2027 wet season." | |
| Project Files: |
Contact Staff for files | |
| Staff Contact: |
Alyssa Bucci
(510) 622-2462 Water Quality Control Board 1515 Clay Street, Ste 1400 Oakland, CA 94612 |
