Cal. Water Code § 8708

Whenever assurances shall have been given to the Secretary of War pursuant to Article 2 of Chapter 3 of this part, that the State will maintain and operate works after completion in accordance with regulations prescribed by the Secretary of War, it is unlawful for any person or public agency to in anywise interfere with or obstruct the performance of the maintenance or operation of such works, including, but not limited to, the encroachment upon any land, or right of way or easement thereon, acquired by the board for the maintenance or operation of any levee or other such works.