Planning standards for stormwater runoff.
Columbus City Codes § 3124.11
in effect3124.11 - Planning standards for stormwater runoff.
All stormwater management systems shall meet requirements as provided in the division of water reclamation's Drainage Manual. Any deviations from these requirements shall require the approval from the division of water reclamation.
Standards require construction of storm sewers to convey a two (2) year, twenty-four (24) hour storm event within the pipe and a five (5) year, twenty-four (24) hour storm event within the piped system. Development shall restrict the peak flow from a property to a two (2) year, twenty-four (24) hour storm event at a runoff coefficient (rational method) of four-tenths (0.4), or limit the peak flow to the ability of the downstream stormwater system to convey the flow.
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(Ord. 2229-04 § 16 (part); Ord. No. 1682-2025, §§ 3, 4, 6-30-2025)
Source: City of Columbus, City Codes and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/oh/columbus/codes/code_of_ordinances?nodeId=TIT31PLHIPRCO_CH3124ADPUFA_3124.11PLSTSTRUFetched: 10/27/2026