15.15.190 Floodways.
Located within areas of special flood hazard established in TMC 15.15.080 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. No new or replacement structures or substantial improvements are allowed within 35 feet of the floodway, as established in Chapter 18.85 TMC. In addition, Chapter 18.85 TMC establishes wetland and riparian area setbacks that may be stricter than the floodway setback in some cases. A structure existing within 35 feet of a floodway is a nonconforming structure, and no expansion or substantial improvement of a nonconforming structure is allowed, as established in Chapter 18.195 TMC.
B. Other encroachments are also prohibited, including fill, water-related facilities and roads, unless certification by a registered professional civil engineer is provided demonstrating that such encroachment will not result in any increase in flood levels during the occurrence of the base flood discharge.
C. If the requirements of subsection (A) of this section are satisfied, all new construction, substantial improvements, and other development shall comply with all other applicable flood hazard reduction provisions of Article III, General Provisions, of this chapter. [Ord. 979 § 1 (Exh. A), 2023; Ord. 968 § 2, 2021; Ord. 916 § 5.3, 2016; Ord. 752 § 5.3. Formerly 15.15.180.]