Wash. Rev. Code § 86.16.190
Local governments that have adopted floodplain management regulations pursuant to this chapter shall include provisions that allow for the establishment of livestock flood sanctuary areas at a convenient location within a farming unit that contains domestic livestock. Local governments may limit the size and configuration of the livestock flood sanctuary areas, but such limitation shall provide adequate space for the expected number of livestock on the farming unit and shall be at an adequate elevation to protect livestock. Modification to floodplain management regulations required pursuant to this section shall be within the minimum federal requirements necessary to maintain coverage under the national flood insurance program.
RCW 86.16.190
Findings-Intent-1991 c 322: See note following RCW 86.12.200.