(A) (1) Located within the special flood hazard areas established in § 153.07 of this chapter are areas designated as floodways.
(2) A floodway may be an extremely hazardous area due to the velocity of flood waters, debris or erosion potential.
(3) In addition, the area must remain free of encroachment in order to allow for the discharge of the base flood without increased flood heights and velocities.
(B) Therefore, the following provisions shall apply.
(1) Encroachments are prohibited, including earthen fill material, new construction, substantial improvements or other development within the regulatory floodway. Development may be permitted; however, provided, it is demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering practices that the cumulative effect of the proposed encroachments or new development shall not result in any increase in the water surface elevation of the base flood elevation, velocities or floodway widths during the occurrence of a base flood discharge at any point within the community. A state registered professional engineer must provide supporting technical data, using the same methodologies as in the effective Flood Insurance Study for the city and certification thereof.
(Ord. 703, passed 5-24-2010)