Located within areas of special flood hazard established in Section 8-4.302 are areas designated as floodways. Since floodways are an extremely hazardous area due to the velocity of flood waters which carry debris, potential projectiles, and erosion potential, the following provisions apply:
(a) Until a regulatory floodway is adopted, no new construction, substantial development, or other development (including fill) shall be permitted within Zones A1-30 and AE, unless it is demonstrated that the cumulative effect of the proposed development, when combined with all other development, will not increase the water surface elevation of the base flood more than one (1) foot at any point within the County of Yolo.
(b) Within an adopted regulatory floodway, the County of Yolo shall prohibit encroachments, including fill, new construction, substantial improvements, and other new development unless certification by a registered professional engineer is provided demonstrating that encroachments shall not result in any increase in the base flood elevation during the occurrence of the base flood discharge.
(c) If subsections (a) and (b) are satisfied, all new construction, substantial improvements, and other proposed new development shall comply with all other applicable flood hazard reduction provisions of this chapter.
(Ord. 1445, eff. August 14, 2014; as amended by Ord. 1500, eff. July 26, 2018)