Cal. Water Code § 8710

Every plan of reclamation, flood control, drainage, improvement, dredging or work, that includes or contemplates the construction, enlargement, revetment or alteration of any levee, embankment, canal or other excavation in the bed of or along or near the banks of the Sacramento or San Joaquin Rivers or any of their tributaries or connected therewith, or upon any land adjacent thereto, or within any of the overflow basins thereof, or upon any land susceptible to overflow therefrom, shall be approved by the board before construction is commenced.