Water Code § 12717
ARTICLE 3. Projects in Other Watersheds
The Contra Costa County Flood Control and Water Conservation District shall give assurances satisfactory to the Secretary of the Army that the local co-operation required by the Act of Congress approved July 14, 1960 (Public Law 86-645, 74 Stat. 480, Title II, the “Flood Control Act of 1960”), will be furnished by the district in connection with the project for flood control adopted and authorized in Section 12716.