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Located within areas of special flood hazard identified in Section 335-3(b) are areas designated as floodways. Since the floodway is an extremely hazardous area due to the velocity of flood waters which carry debris, potential projectiles, and erosion potential, the following provisions apply:

(a) There shall be no encroachments, including fill, new construction, substantial improvements, or other development unless a registered professional engineer or architect provides a certificate demonstrating that encroachments shall not result in any increase in flood levels during the occurrence of the base flood discharge.

(b) If no floodway is identified, encroachment is prohibited as above within fifteen (15) feet from the bank(s) of the watercourse and there shall be 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 foot (1') at any point within the County of Humboldt. (Ord. 1541, § 4, 7/13/1982; Ord. 2560, § 1, 10/4/2016)