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Compared to the Columbia River above the two rivers' confluence, the Pend Oreille-Clark-Flathead is nearly as long (about 86%), its basin about three-fourths as large (76%), and its discharge over a third (37%). [220] Kp'itl'els , Sinixt village site at the confluence of the Kootenay and Columbia Rivers
The Columbia Basin. The Columbia River drainage basin is the drainage basin of the Columbia River in the Pacific Northwest region of North America.It covers 668,000 km 2 or 258,000 sq mi. [1] In common usage, the term often refers to a smaller area, generally the portion of the drainage basin that lies within eastern Washington.
The Columbia River is the only river on the West Coast (and arguably the entire North American Pacific coast) that is navigable for a significant length. The river is regularly dredged, and freight barges may reach as far inland as Lewiston, Idaho , through a system of locks; however, there are strict draft restrictions beyond the confluence ...
Tributaries and sub-tributaries are hierarchically listed in order from the mouth of the Columbia River upstream. Major dams and reservoir lakes are also noted. Map of the Columbia drainage Basin with the Columbia River highlighted and showing the major tributaries
Averaging a major dam every 72 miles (116 km), the rivers in the Columbia watershed combine to generate over 36,000 megawatts of power, with the majority coming on the main stem. Grand Coulee Dam is the largest producer of hydroelectric power in the United States, [ 1 ] generating 6,809 megawatts, over one-sixth of all power in the basin.
This is a list of rivers in the U.S. state of Washington. ... Columbia River Basin, showing major dams and tributaries ... USGS Hydrologic Unit Map - State of ...
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.
Listed in order going downstream: British Columbia: . Headwaters to the Canada–United States border: . Canal Flats; Fairmont Hot Springs; Windermere; Invermere; Radium Hot Springs ...