§ 1136. Overbank flooding protection.

Downstream overbank flood and property protection shall be provided by controlling or attenuating the post-development peak discharge rate to the pre-development rate for the 25-year, 24-hour return frequency storm event. In instances where control of the one-year, 24-hour storm under this article is exempted, peak discharge rate attenuation of the two-year through the 25-year return frequency storm event must be provided. This requirement may be adjusted or waived by Jackson County for sites where the post-development downstream analysis shows that uncontrolled post-development conditions will not increase downstream peak flows, or that meeting the requirement will cause greater peak flow downstream impacts than the uncontrolled post-development conditions.

(Ord. No. 17-003 , § 1, 10-2-2017)