Section 401 Water Quality Certification Public Notice
04-22914 Interstate 680-State Route 4 Interchange Improvements Project - Phases 2A and 4
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: |
04-22914 Interstate 680-State Route 4 Interchange Improvements Project - Phases 2A and 4 |
| City/County: |
Contra Costa County |
| Comment Period: |
1/27/2026 - 02/16/2026 |
| Project Description: |
The Contra Costa Transportation Authority (CCTA), in cooperation with the California Department of Transportation (Caltrans),proposes to construct Phases 2a and 4 of improvements for the I-680/SR 4 Interchange Improvement Project (Project) in Contra Costa County to improve specific safety and operations. |
| 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 |
