Cal. Water Code § 12849

Any local agency sponsoring a project subject to the provisions of this chapter is hereby authorized to design, construct, operate, and maintain public recreational facilities at such project and shall have such powers as may be necessary or convenient to carry out the provisions of this chapter. Local sponsoring agencies are authorized to contract with the United States, the State of California, and with other local agencies or entities in order to realize the full potential of flood control and watershed protection projects for recreational development and for fish and wildlife enhancement.