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  2. Columbia River Estuary - Wikipedia

    The Columbia River Estuary is situated on the Oregon – Washington border and the Pacific Coast of the United States. It was traditionally inhabited by the Chinook Native Americans and discovered by settlers in 1788. The Estuary plays host to a plethora of species of marine and terrestrial flora and fauna, and multiple conservation ...

  3. Columbia River redband trout - Wikipedia

    The Columbia River redband trout, the inland redband trout or the interior redband trout ( Oncorhynchus mykiss gairdneri) is one of three redband trout subspecies of the rainbow trout in the family Salmonidae. It is native in the Columbia River and its tributaries in Idaho, Oregon, Washington and Montana. It includes sea-run anadromous forms ...

  4. Columbia River Treaty - Wikipedia

    The Columbia River Treaty is a 1961 agreement between Canada and the United States on the development and operation of dams in the upper Columbia River basin for power and flood control benefits in both countries. Four dams were constructed under this treaty: three in the Canadian province of British Columbia ( Duncan Dam, Mica Dam, Keenleyside ...

  5. List of dams in the Columbia River watershed - Wikipedia

    Including just the dams listed below, there are 60 dams in the watershed, with 14 on the Columbia, 20 on the Snake, seven on the Kootenay, seven on the Pend Oreille / Clark, two on the Flathead, eight on the Yakima, and two on the Owyhee. Averaging a major dam every 72 miles (116 km), the rivers in the Columbia watershed combine to generate ...

  6. Fish ladder - Wikipedia

    One of the oldest styles of fish ladders. It uses a series of small dams and pools of regular length to make a long, sloping channel for fish to travel around the obstruction. The channel acts as a fixed lock to gradually step down the water level; to head upstream, fish must jump over from box to box in the ladder. Baffle fishway

  7. Bonneville Dam - Wikipedia

    Bonneville Lock and Dam / ˈbɒnəvɪl / consists of several run-of-the-river dam structures that together complete a span of the Columbia River between the U.S. states of Oregon and Washington at River Mile 146.1. The dam is located 40 miles (64 km) east of Portland, Oregon, in the Columbia River Gorge.

  8. Snail darter controversy - Wikipedia

    Snail darter, Percina tanasi. The snail darter controversy related to the discovery in 1973 of an endangered species during the construction of the Tellico Dam on the Little Tennessee River; the dam project had been authorized and begun before passage of protective environmental legislation. On August 12, 1973, University of Tennessee biologist ...

  9. USS West Bridge - Wikipedia

    1 × 4-inch (102 mm) gun. 1 × 3-inch (76 mm) gun. USS West Bridge (ID-2888) was a Design 1013 cargo ship in the United States Navy during World War I. She was begun as War Topaz for the British Government but was completed as West Bridge (though referred to in some publications under the spelling Westbridge ). After being decommissioned from ...

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