A floodway is the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than one foot. A floodway is an extremely hazardous area due to the velocity of flood waters which carry debris, potential projectiles and erosion potential. The Flood Insurance Rate Map (or Flood Hazard Boundary Map) does not designate a floodway. However, floodways may be delineated in other sources of flood information as specified in Section 1456.13(b). The following provisions apply within all delineated floodway areas:
(a) 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.
(b) If subsection (a) is satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of Section 1456.16.
(c) Any encroachment within the floodway that would result in an increase in base flood elevations can only be granted upon prior approval by the Federal Emergency Management Agency. Such requests must be submitted by the City Manager to the Federal Emergency Management Agency and must meet the requirements of the National Flood Insurance Program.
(Ord. 92-24. Passed 7-14-92.)