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A. Any land-disturbing activity may be required to provide stormwater management facilities or make other improvements to the existing drainage system to address water quantity concerns, water quality concerns, or both if the proposed development will increase potential flood damages to existing properties or significantly increase pollutant levels in downstream receiving waters.

B. Stormwater management facilities adequate to accommodate a ten-year or greater storm shall be provided that generally follow existing natural drainage systems. Piping and modification of streams and other natural water courses should be minimized and shall be considered on a case-by-case basis to determine if it is necessary and environmentally sound. Such facilities shall be designed, constructed and maintained to minimize flooding, protect downslope properties, preserve water quality, and adequately transport existing and projected stormwater flows.

C. Development plans, site plans, and preliminary plats shall require a stormwater impact analysis that complies with the requirements of the City Public Works Director or County Engineer, or appropriate designees, and which determines the impact of the increased stormwater runoff on downstream stormwater facilities and properties.

D. The need for stormwater management facilities to address offsite impacts shall be determined by the City Public Works Director or County Engineer, or their designees, as appropriate.