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The Columbia River (Upper Chinook: ... Within the watershed are diverse landforms including mountains, arid plateaus, river valleys, rolling uplands, and deep gorges.
The Columbia River Gorge is a canyon of the Columbia River in the Pacific Northwest of the United States. Up to 4,000 feet (1,200 m) deep, the canyon stretches for over eighty miles (130 km) as the river winds westward through the Cascade Range, forming the boundary between the state of Washington to the north and Oregon to the south. [1]
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.
Bathymetric map of the Columbia River mouth: isobaths at five-foot (1.5 m) intervals, 15–310 feet (4.6–94.5 m). Sandbars in yellow. The Columbia Bar is a system of bars and shoals at the mouth of the Columbia River spanning the U.S. states of Oregon and Washington.
Opened in 1966, it is more than 4 miles long and built to withstand vicious currents and waves and winds of up to 150 mph howling through the Columbia River Gorge. But it was not built for this.
The Cascade Locks and Canal was a navigation project on the Columbia River between the U.S. states of Oregon and Washington, completed in 1896. It allowed the steamboats of the Columbia River to bypass the Cascades Rapids, and thereby opened a passage from the lower parts of the river as far as The Dalles.
The book's arrival comes as the United States and Canada are renegotiating the Columbia River Treaty, a 60-year-old agreement that guides management of the river and its hydroelectric dams.
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]