Cal. Streets and Highways Code § 727

If a person is thus notified, and fails, neglects, or refuses to cease and discontinue the diversion, to discontinue and prevent the drainage, seepage, or overflow of the waters, or to make the repairs required by Section 726, the department may make the repairs and may also perform work as is necessary to prevent the further drainage, diversion, overflow, or seepage of the waters. The department, in the name of the people of the State of California, may recover in an action at law, in a court of competent jurisdiction, the amount expended for the repairs and work and, in addition thereto, the sum of three hundred fifty dollars ($350) for each day the drainage, diversion, overflow or seepage of waters is permitted to continue after the service of the notice in the manner required by Section 726, together with the costs and expenses incurred in the action.