Cal. Water Code § 12721.5

(a) The project for flood control on the Santa Ana River at Norco Bluffs is adopted and authorized substantially in accordance with the final report of the Chief of Engineers of the United States Army Corps of Engineers dated December 23, 1996, as authorized by Section 101(b)(4) of the Water Resources Development Act of 1996 (P.L. 104-303), at an estimated cost to the state of the sum that may be appropriated for state cooperation by the Legislature, upon the recommendation and advice of the department. (b) The Riverside County Flood Control and Water Conservation District shall give assurances satisfactory to the Secretary of the Army that the local cooperation required by the final report of the Chief of Engineers of the United States Army Corps of Engineers dated December 23, 1996, will be furnished by the district in connection with the project for flood control adopted and authorized in subdivision (a). (c) The district, in conjunction with the Department of the Army, shall carry out the plans and project and may make modifications and amendments to the plans as may be necessary to carry out the plans for the purposes of Chapter 1 (commencing with Section 12570) and this chapter.