Wash. Rev. Code § 86.26.105
A comprehensive flood control management plan shall determine the need for flood control work, consider alternatives to in-stream flood control work, identify and consider potential impacts of in-stream flood control work on the state's in-stream resources, and identify the river's meander belt or floodway. A comprehensive flood control management plan shall be completed and adopted within at least three years of the certification that it is being prepared, as provided in RCW 86.26.050.
If after this three-year period has elapsed such a comprehensive flood control plan has not been completed and adopted, grants for flood control maintenance projects shall not be made to the county or municipal corporations in the county until a comprehensive flood control plan is completed and adopted by the appropriate local authority. These limitations on grants shall not preclude allocations for emergency purposes made pursuant to RCW 86.26.060.
RCW 86.26.105