A. It shall be unlawful for any person or entity to alter any natural drainage course, topography, or existing drainage facility in such a way as to damage or endanger by flooding, erosion, nuisance water or any other means any public or private property or improvements without written approval of the city engineer. For purpose of this subsection, “alter” includes to change any surface sheet flow by obstruction or diversion through the erection of fences, berms, curbs, or any other excavation, fill, or structure, if such modification will change flow in any existing drainage course or facility.

B. It shall be unlawful to change the quality, flow rates, or flow patterns of surface runoff where it enters or exits a parcel, unless authorized in writing by the city engineer. [Ord. 2023-06 § 1, 9-12-2023].