(A) Minimum control requirements. All stormwater management practices will be designed so that the specific storm frequency storage volumes (e.g., recharge, water quality, channel protection, 10-year, 100-year) as identified in the current Stormwater Development Manual are met, unless the city grants the applicant a waiver or the applicant is exempt from such requirements. In addition, if hydrologic or topographic conditions warrant greater control than that provided by the minimum control requirements, the city reserves the right to impose any and all additional requirements deemed necessary to control the volume, timing, and rate of runoff.
(B) Site design feasibility. Stormwater management practices for a site shall be chosen based on the physical conditions of the site. Among the factors that should be considered:
(1) Topography;
(2) Maximum Drainage Area;
(3) Depth to Water Table;
(4) Soils;
(5) Slopes;
(6) Terrain;
(7) Location in relation to environmentally sensitive features or ultra-urban areas; and
(8) Applicants shall consult the Stormwater Development Manual for guidance on the factors that determine site design feasibility when selecting a stormwater management practice.
(C) Conveyance issues. All stormwater management practices shall be designed to convey stormwater to allow for the maximum removal of pollutants and reduction in flow velocities. This shall include, but not be limited to:
(1) Maximizing of flowpaths from inflow points to outflow points;
(2) Protection of inlet and outfall structures;
(3) Elimination of erosive flow velocities; and
(4) Providing of underdrain systems, where applicable.
(D) The Stormwater Development Manual shall provide detailed guidance on the requirements for conveyance for each of the approved stormwater management practices.
(Ord. 35-2004, passed 10-4-04)