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The Columbia River (Upper Chinook: Wimahl or Wimal; Sahaptin: Nch’i-Wàna or Nchi wana; Sinixt dialect swah'netk'qhu) is the largest river in the Pacific Northwest region of North America. [14] The river forms in the Rocky Mountains of British Columbia, Canada.
Columbia River Basin. Wallula Gap (/ w ə ˈ l uː l ə /) is a large water gap of the Columbia River in the Northwestern United States, in Southeastern Washington.It cuts through the Horse Heaven Hills basalt anticlines in the Columbia River Basin, just south of the confluence of the Walla Walla and Columbia rivers.
In 1792, Robert Gray, an American fur trader, crossed the bar in his ship the Columbia Redeviva and became the first white settler to enter the estuary, subsequently naming the estuary Gray's Bay and the river Columbia River. During the 20th century, there existed some ambiguity with regards to who discovered the estuary, though today it is ...
The Pend Oreille River (/ ˌ p ɒ n d ə ˈ r eɪ / POND-ə-RAY) is a tributary of the Columbia River, approximately 130 miles (209 km) long, in northern Idaho and northeastern Washington in the United States, as well as southeastern British Columbia in Canada. In its passage through British Columbia its name is spelled Pend-d'Oreille River. [7]
To the south it reaches upstream the Columbia River towards the city of Golden. The original, smaller Kinbasket Lake was named in 1866 after Kinbasket, a chief of the Shuswap people . The modern, large lake was created after the completion of the Mica Dam in 1973, and was called McNaughton Lake (after Andrew McNaughton ) until 1980.
After each ice dam rupture, the waters of the lake would rush down the Clark Fork and the Columbia River, flooding much of eastern Washington and the Willamette Valley in western Oregon. After the lake drained, the ice would reform, creating Glacial Lake Missoula again. These floods have been researched since the 1920s.
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The Kettle River is a 281-kilometre (175 mi) tributary of the Columbia River, encompassing a 10,877-square-kilometre (4,200 sq mi) drainage basin, of which 8,228 square kilometres (3,177 sq mi) are in southern British Columbia, Canada and 2,649 square kilometres (1,023 sq mi) in northeastern Washington, US.