The department of ecology shall prepare and perfect from time to time a state master plan for flood control, state public reservations, financed in whole or in part from moneys collected by the state, sites for state public buildings and for the orderly development of the natural and agricultural resources of the state. The plan shall address how the department will expedite the completion of projects of statewide significance. The plan shall be a guide in making recommendations to the officers, boards, commissions, and departments of the state.
Whenever an improvement is proposed to be established by the state, the state agency having charge of the establishment thereof shall request of the director a report thereon, which shall be furnished within a reasonable time thereafter. In case an improvement is not established in conformity with the report, the state agency having charge of the establishment thereof shall file in its office and with the department a statement setting forth its reasons for rejecting or varying from such report which shall be open to public inspection.
The department shall insofar as possible secure the cooperation of adjacent states, and of counties and municipalities within the state in the coordination of their proposed improvements with such master plan.