Cal. Wat. Code § 12704
The project for flood protection on San Lorenzo River in Santa Cruz County is adopted and authorized substantially in accordance with the recommendations of the Chief of Engineers in House Document Numbered 447, Eighty-third Congress, Second Session, as authorized by act of Congress approved September 3, 1954, Chapter 1264, Public Law 780, Eighty-third Congress, Second Session (Title II, the "Flood Control Act of 1954"), at an estimated cost to the State of such sum as may be appropriated for state cooperation by the Legislature upon the recommendation and advice of the department, when funds for carrying out the project are appropriated by Congress; provided, that the requirement that local interests make a cash contribution to the United States equal to 8.9 percent of the project cost, is for payment of local benefits not related to flood control, and shall not be payable or reimbursable by the State.
Ca. Water Code § 12704