§ 160.036  SITE RUNOFF STORAGE FACILITY REQUIREMENTS WITHIN THE REGULATORY FLOODPLAIN.
   Storage facilities located within the regulatory floodplain shall:
   (A)   Conform to all applicable requirements specified in §§ 160.080 through 160.100 of this chapter;
   (B)   Store the required amount of site runoff to meet the release rate requirement under all stream flow and backwater conditions in the receiving stream up to the 10-year flood elevation;
   (C)   Detention volume provided by enlarging existing regulatory floodplain storage without providing a structure controlling discharge (on-stream detention) will be allowed only as a variance. The applicant must demonstrate that flood damages are not increased and the development will not increase flood flows for both the 2-year and 100-year floods on the stream with developed conditions on the site; and
   (D)   The Administrator may approve designs which can be shown by detailed hydrologic and hydraulic analysis to provide a net watershed benefit not otherwise realized by strict application of the requirements in divisions (A) through (C) above.
(Ord. 06-0383, passed 3-15-06)