As used in this chapter, and unless the context indicates otherwise, words and phrase shall mean:
"Department" means the department of ecology;
"Director" means the director of ecology;
"State agency" and "state agencies" mean any branch, department or unit of state government, however designated or constituted;
"Water resources" means all waters above, upon, or beneath the surface of the earth, located within the state and over which the state has sole or concurrent jurisdiction.
"Beneficial use" means, but its meaning shall not be limited to: Domestic water supplies; irrigation; fish, shellfish, game, and other aquatic life; recreation; industrial water supplies; generation of hydroelectric power; and navigation.