Kobold Reach of Northern Drainage Repairs

The Kobold Reach of Northern Drainage Repairs project, managed by the San Francisco Bay Regional Water Quality Control Board, focuses on arresting channel incision that is undermining original stabilization measures in Castro Valley, Alameda County. The scope of work includes the reconstruction of five existing in-channel weirs, the construction of one new in-channel weir, and the installation of a new notched concrete weir at the downstream end of the project reach. These efforts are designed to prevent ongoing incision of the Northern Drainage and protect established riparian habitat. The project is classified under NAICS code 237990 and is located at Tassajara Road in Dublin, California. A Notice of Exemption has been filed under Class I of the CEQA Guidelines and PRC 21080(b)(10), indicating that the project consists of minor repairs with negligible expansion of use. Brian Wines, a Water Resource Control Engineer, serves as the primary point of contact for the agency. The project was formally documented and signed on September 19, 2025.