Cal. Pub. Res. Code § 5093.56

No department or agency of the state may assist or cooperate, whether by loan, grant, license, or otherwise, with any department or agency of the federal, state, or local government, in the planning or construction of a dam, reservoir, diversion, or other water impoundment facility that could have an adverse effect on the free-flowing condition and natural character of the rivers and segments thereof designated in Section 5093.54 as included in the system.