Section 401 Water Quality Certification Public Notice

EA-2Q770 Construct Roundabout At State Route (Sr) 116 And Lakeville Hwy PM 39.27


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-2Q770 Construct Roundabout At State Route (Sr) 116 And Lakeville Hwy PM 39.27
City/County:

Lakeville, Sonoma County
Comment Period:

5/28/2026 - 06/17/2026
Project Description:

The purpose of this Project is to improve safety on SR 116 at the intersection with Lakeville Highway by reducing the potential for broadside collisions and decreasing the severity of accidents. The Project is needed due to an established pattern of broadside collisions involving northbound vehicles on Lakeville Highway and vehicles turning left to go eastbound on SR 116.
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