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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]
The Columbia River Gorge facing east toward Beacon Rock. The Deschutes River joins the Columbia near The Dalles. Between The Dalles and Portland, the river cuts through the Cascade Range, forming the dramatic Columbia River Gorge. Via the gorge, the Columbia crosses the Cascades at a lower elevation than any other river.
Together these peaks form an impressive group on the Washington side of the Gorge. Between 1425 and 1450 AD the south side of Table Mountain sheared off and dammed the Columbia River in an event known as the Bonneville Slide. [4] The river soon carved a new bend around to the south, but for a while Native Americans living in the area could walk ...
Dams of the Columbia River Basin. Click to view higher resolution and read legend. Hydroelectric generators in the basin sized by capacity. 17 dams on the British Columbia side of Canada-US border not shown. There are more than 60 dams in the Columbia River watershed in the United States and Canada. Tributaries of the Columbia River and their ...
Left tributary Right tributary Length (km) Basin size (km 2) . Average discharge (m 3 /s) . Lower Columbia. Mouth to Bonneville Dam. Youngs: 43 257.6 14.7 Grays: 48 320 15.9 Elochoman
Greenleaf Peak is a mountain in the Cascade Range in the U.S. state of Washington, located on the north side of the Columbia River near Table Mountain, in the Columbia River Gorge. The peak lies within the Columbia River Gorge National Scenic Area near Bonneville Dam. It is 3,424 feet (1,044 m) in elevation. [1]
[3] The largest lake within the boundaries of the Columbia River Gorge, it is the source of the East Fork of Eagle Creek, and at 184 feet (56 m) is the deepest lake in the Mount Hood National Forest. [1] At an elevation of 3,727 feet (1,136 m), [2] the lake is located in a cirque formed by glacial erosion. [1]
Cascade Rapids (The Cascades, Grand Rapids, Cascade Falls, Cascades of the Columbia): Located at river mile 146.5 near today's Bonneville Dam in the Columbia River Gorge; at The river fell about 40 feet (12 m) over approximately 2 miles (3.2 km), through a channel about 150 yards (140 m) wide. [ 2 ]