14.34.140 Floodways.
Located within areas of special flood hazard established in LMC 14.34.030 are areas designated as floodways. Since the floodway is an extremely hazardous area due to the velocity of floodwaters which carry debris, potential projectiles, and erosion potential, the following provisions apply:
A. Encroachments, including fill, new construction, substantial improvements, and other development, are prohibited; except as permitted by LMC 14.34.082 (Exemptions). Prior to permitting, the proposed encroachment must be certified by a registered professional engineer demonstrating through hydrologic and hydraulic analyses performed in accordance with standard engineering practice that the proposed encroachment would not result in any increase in flood levels during the occurrence of the base flood discharge.
B. Construction, reconstruction, or substantial improvement of residential structures is prohibited within designated floodways.
C. If subsection A of this section is satisfied, all new construction and substantial improvements shall comply with LMC 14.34.120 and 14.34.130.
D. If subsection A of this section is satisfied or construction is allowed pursuant to subsection B of this section, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of LMC 14.34.120, General standards for flood hazard protection. (Ord. 1654 §7, 2023; Ord. 1398 §12, 2012; Ord. 1375 §28, 2011; Ord. 1265 §7, 2006; Ord. 861 §2 (part), 1989).