Existing drainage ditches, culverts, etc., shall be kept clean at all times. Temporary diversion of any drainage system shall not be permitted without the written consent of the director. Any drainage culverts, catch basins, manholes, etc., disturbed by excavation shall be replaced with new material, or repaired as directed by the city engineer. (Ord. 2726 § 12, 2008; Ord. 462, 1969)