Surface drainage.
Oklahoma City Municipal Code § 16-8
in effect§ 16-8. - Surface drainage.
(a) In single-family residential, duplex, or manufactured home developments, site grading must be carried out in such a manner that surface water and runoff from each dwelling lot will flow directly to a stormwater facility or system, improved channel, sodded swale, or paved street without crossing more than four adjacent lots.
(b) Surface water and runoff collected in streets must be directed to street drains at satisfactory intervals to prevent overflow of six-inch curbs during a 25-year frequency flood event, and all street and street drainage design must be in accordance with the DCM and this chapter. The maximum allowable water spread allowed for the 25-year storm event is one lane width for arterial streets. Surface flow on streets at point of interception shall not exceed 20 acres of drainage area.
(Ord. No. 27691, § 2, 9-24-24)
Source: City of Oklahoma City, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ok/oklahoma_city/codes/code_of_ordinances?nodeId=OKMUCO2020_CH16DRFLCO_S16-8SUDRFetched: 10/28/2026