(a) Areas with Floodways. The Flood Insurance Study referenced in Section 1331.05 identifies a segment within areas of special flood hazard known as a floodway. Floodways may also be delineated in other sources of flood information as specified in Section 1331.13(b). The floodway is an extremely hazardous area due to the velocity of flood waters which carry debris, potential projectiles and cause erosion. The following provisions apply within all delineated floodway areas:
(1) Prohibit encroachments, including fill, new construction, substantial improvements, and other development unless a hydrologic and hydraulic analysis performed in accordance with standard engineering practices demonstrates that the proposed encroachment would not result in any increase in flood levels during the occurrence of the base flood discharge.
(2) If subsection (a)(1) is satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of Section 1331.15 et. seq.
(3) Any encroachment within the floodway that would result in an increase in base flood elevations can only be granted upon the prior approval by the Federal Emergency Management Agency. Such requests must be submitted by the Floodplain Administrator to the Federal Emergency Management Agency and must meet the requirements of the National Flood Insurance Program.
(b) Areas Without Floodways. In all areas of special flood hazard where FEMA has provided base flood elevation data as set forth in Section 1331.05, but FEMA has not delineated a floodway, the following provisions apply:
(1) New construction, substantial improvements or other development (including fill) shall only be permitted if it is demonstrated that the cumulative effect of any proposed development, when combined with all other existing and anticipated development, shall not increase the water surface elevation of the base flood more than 1 (one) foot at any point.
(2) If subsection (b)(1) is satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of Section 1331.15 et. seq.
(Ord. 01-07. Passed 4-3-07.)