It shall be unlawful for any person to divert, obstruct, or alter in any way the course or bed of any watercourse, drainage basin, storm drain, or channel within the City, except in cases approved by the Public Works Director and/or the City Engineer. (Ord. 1030 § 2(7), 2018; Ord. 1005 § 3, 2015; Ord. 344 § 1 (part), 1967; Ord. 186 § 3, 1948)