Chapter 16C.05.32
FLOODWAY FRINGE USES

Sections:

16C.05.32.010    Permitted Uses.

16C.05.32.020    Prohibited Uses.

16C.05.32.010 Permitted Uses.

The following uses are permitted in the floodway fringe areas:

(1)    Any use permitted in the zoning district in accordance with YCC Title 19 of the Yakima County Code, unless prohibited by Section 16C.05.32.020.

(2)    Utility Transmission Lines. Utility transmission lines shall be permitted when consistent with YCC Title 19 and where not otherwise inconsistent with Chapters 16C.05.20 through 16C.05.72; except that when the primary purpose of such a transmission line is to transfer bulk products or energy through a floodway fringe or special flood hazard area, such transmission line shall conform to the following:

(a)    Electric transmission lines shall cross floodway fringe and special flood hazard areas by the most direct route feasible. When support towers must be located within floodway fringe or special flood hazard areas, they shall be placed to avoid high floodwater velocity and/or depth areas, and shall be adequately floodproofed.

(b)    Buried utility transmission lines transporting hazardous materials, including but not limited to crude and refined petroleum products and natural gas, shall be buried a minimum of four feet. Such burial depth shall be maintained within the floodway fringe or special flood hazard area to the maximum extent of potential channel migration as determined by hydrologic analyses. All such hydrologic analyses shall conform to requirements of Section 16C.05.36.010(2)(c).

(c)    Beyond the maximum extent of potential channel migration, utility transmission lines transporting hazardous and nonhazardous materials shall be buried below existing natural and artificial drainage features. Burial depth in all other agricultural and nonagricultural floodway fringe or special flood hazard areas shall be determined on the basis of accepted engineering practice and in consideration of soil conditions and the need to avoid conflict with agricultural tillage.

(d)    Aboveground utility transmission lines, not including electric transmission lines, shall only be allowed for the transportation of nonhazardous materials. In such cases, applicants must demonstrate that line placement will have no appreciable effect upon flood depth, velocity or passage. Such lines shall be adequately protected from flood damage.

(e)    Aboveground utility transmission line appurtenant structures, including valves, pumping stations or other control facilities, shall not be permitted in floodway fringe or special flood hazard areas except where no other alternative is available, or in the event a floodway fringe or special flood hazard location is environmentally preferable. In such instances, aboveground structures shall be located so that no appreciable effect upon flood depth, velocity or passage is created, and shall be adequately floodproofed.

(Ord. 5-2017 § 2(C) (Exh. 1) (part), 2017: Res. 80-2016 (Exh. A) (part), 2016; Ord. 13-2007 §1 (Exh. A)(16C.05.32.010), 2007).

16C.05.32.020 Prohibited Uses.

The following uses shall be prohibited in floodway fringe areas:

(1)    New manufactured home parks and the expansion of manufactured home parks.

(Ord. 5-2017 § 2(C) (Exh. 1) (part), 2017: Ord. 13-2007 §1 (Exh. A)(16C.05.32.020), 2007).