(A) Detention in wetlands, rivers, streams, lakes, or ponds. Existing wetlands, rivers, streams, lakes, or ponds shall not be modified for the purposes of stormwater detention unless it is demonstrated that the proposed modifications will maintain or improve its habitat and ability to perform beneficial functions, and shall comply with other relevant permitting. Existing storage and release rate characteristics of wetlands, rivers, streams, lakes, or ponds shall be maintained and the volume of detention storage provided to meet the requirements of this division (A) shall be in addition to this existing storage.
(C) Alteration of drainage patterns. Site drainage patterns shall not be altered to substantially decrease or increase the existing area tributary to wetlands, rivers, streams, lakes, or ponds. Drainage patterns shall not be altered by development to direct runoff off site to other than natural drainage outlets existing prior to development.
(D) Detention/sedimentation. All runoff from the development shall be routed through a preliminary detention/sedimentation basin designed to capture the two-year, 24-hour event and hold it for at least 24 hours before being discharged to the basin. This basin shall be constructed before property grading begins and shall be maintained throughout the construction process. In addition, the BMP hierarchy defined in section 3-5 of this article should be followed to minimize runoff volumes and rates being discharged.
(E) Vegetated buffer strip. A buffer strip of at least 25 feet in width, preferably vegetated with native plant species, shall be maintained or restored around the periphery of a wetland, river, stream, lake, or pond.
(Ord. passed - -)