Kettle River (Columbia River tributary) 706. The Kettle River is undammed, making it one of the extremely few rivers with constant flow in the Pacific Northwest. The Kettle River once supported salmon and other anadromous fish. The construction of Grand Coulee Dam, along with Chief Joseph Dam, blocked fish migration up the Columbia and its upper tributaries, including the Kettle River. In addition, Grand Coulee Dam's reservoir, Lake Roosevelt, flooded traditional fishery sites, including Kettle Falls near the mouth of the Kettle River. Kettle River (Columbia River tributary) The Kettle River is a tributary of the Columbia River in southeastern British Columbia in Canada and
Columbia River known as the Grand Coulee. After the floods, the river found its present course, and the Grand Coulee was left dry. The construction of the Grand Coulee Dam in the mid-20th century impounded the river, forming Lake Roosevelt, from which water was pumped into the dry coulee, forming the reservoir of Banks Lake. The river flows past The Gorge Amphitheatre, a prominent concert venue in the Northwest, then through Priest Rapids Dam, and then through the Hanford Nuclear Reservation. Entirely within the reservation is Hanford Reach, the only US stretch of the river that is completely free-flowing, unimpeded by dams