(A) Storm water runoff peak flow rates for the 10-year and 100-year frequency storms shall not cause increased adverse inundation of any building or roadway surface.
(B) Street curbs, gutters, inlets and storm sewers shall be designed to intercept, contain and transport all runoff from the 10-year frequency storm, without overtopping the curb.
(C) In addition to division (B) above, the public drainage system shall be designed to convey those flows from greater than the 10-year frequency storm up to and including the 100-year frequency storm within defined public rights-of-way or drainage easements.
(D) When storm water detention is provided, storm water runoff peak flow rates shall not be increased at any point of discharge for the 25-year storm. The 100-year storm event shall be passed from the detention facility through an emergency spillway such that the flow from that event shall not overtop the facility or cause damage to downstream facilities.
(Ord. 2007-18, passed 6-26-07)