When subdivision development will result in increased runoff beyond the boundaries of the subdivision which cannot be accommodated through channel improvements without causing downstream flooding, the Planning Commission may require the construction of one (1) or more retention reservoirs on the subdivision which will temporarily impound and discharge water from the subdivision site at the rate and volume equivalent to the discharge from the undeveloped subdivision site. The design shall be for a one hundred (100) year frequency flood. Plans shall be approved by the City Engineer. The construction and maintenance of retention reservoirs shall be the responsibility of the developer.
(Code 1991, § 12-513)