RCW 79.110.330: Grant of overflow rights.

The department has the power and authority to grant to any person, the right, privilege, and authority to perpetually back and hold water upon or over any state-owned tidelands or shorelands, and to overflow and inundate the lands, whenever the department deems it necessary for the purpose of erecting, constructing, maintaining, or operating any water power plant, reservoir, or works for impounding water for power purposes, irrigation, mining, or other public use in accordance with the provisions of RCW 79.36.570.