Section 401 Water Quality Certification Public Notice
San Lorenzo Creek Concrete Channel Emergency Repair
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: |
San Lorenzo Creek Concrete Channel Emergency Repair |
| City/County: |
San Lorenzo, Alameda County |
| Comment Period: |
4/15/2025 - 5/5/2025 |
| Project Description: |
On 12/29/2024, the concrete portion of San Lorenzo Creek just downstream of Washington Avenue suffered severe damage and distress due to the high pressure 6” PG&E gas line and 12” EBMUD water line leaks. These leaks caused uplift of the channel invert and longitudinal cracking, leading to piping erosion of soil beneath the concrete channel and behind the concrete channel walls, creating voids and a sinkhole. The concrete channel invert serves as the footing for the channel retaining walls and its continuing functionality and serviceability are crucial for flood control. |
| Project Files: |
Contact Staff for files |
| Staff Contact: |
Brian Wines (510) 622-5680 Water Quality Control Board 1515 Clay Street, Ste 1400 Oakland, CA 94612 |
