California Code, Water Code - WAT § 7047

No person may alter, divert or deflect the course of any nonnavigable stream in any surface mining dredging operation without first obtaining the approval of the board of supervisors of the county in which dredging is being done.

Nothing in this section shall be construed as conflicting with the powers of the State Reclamation Board or the California Debris Commission or contractors or permittees carrying out flood control projects under authority of either board or commission.