For the purposes of this chapter, the following definitions shall be used.

(1) "Department" means the Washington state department of ecology.

(2) "Reservation" means the designation of specific amounts of the water resources for specific future beneficial uses.

(3) "John Day/McNary Pools Reach," means that part of the Columbia River from John Day Dam upstream to the upper limits of McNary Pool including the upper limits of the pool in the Snake River, the Yakima River, and the Walla Walla River. This reach extends from river mile 216 to river mile 352 of the Columbia River, and includes the lower 10 miles of the Snake River, the lower 6 miles of the Yakima River, and the lower 9 miles of the Walla Walla River.