Wash. Rev. Code § 86.24.020
The department of ecology, in cooperation with the corps of engineers of the United States army, and any other agencies of the United States, and in cooperation with any official, agency or institution of the state and any flood control district created under the laws of the state, and any county, or any counties acting jointly pursuant to RCW 86.13.010 through 86.13.090, shall act for the state in the formulation of plans for the control of floods in the several flood areas of the state, and shall consider the extent to which the state should participate therein with the United States and/or any flood control district, or county, or counties so acting jointly. In case of federal participation, the plan of development and the surveys, plans and specifications for such flood control projects shall be in accordance with the federal requirements therefor.
RCW 86.24.020
Purpose-Short title-Construction-Rules-Severability-Captions-1987 c 109: See notes following RCW 43.21B.001.