Section 401 Water Quality Certification Public Notice
EA-4X530 NAP 29 PM 23.54 Culvert Failure
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: |
EA-4X530 NAP 29 PM 23.54 Culvert Failure |
| City/County: |
Unincorporated, Napa County |
| Comment Period: |
9/30/2025 - 10/20/2025 |
| Project Description: |
An existing concrete arch culvert has failed and State Route 29 being is in imminent risk of failure. |
| Project Files: |
Contact Staff for files |
| Staff Contact: |
Qi Yan (510) 622-2329 Water Quality Control Board 1515 Clay Street, Ste 1400 Oakland, CA 94612 |
