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The Willamette River is a 187-mile (301 km) tributary of the Columbia River in the U.S. state of Oregon. The upper tributaries of the Willamette originate in mountains south and southeast of the twin cities of Eugene and Springfield .
The Yakima River is a tributary of the Columbia River in south central and eastern Washington state, named for the indigenous Yakama people. Lewis and Clark mention in their journals that the Chin-nâm pam (or the Lower Snake River Chamnapam Nation) called the river Tâpe têtt [6] (also rendered Tapteete), [7] possibly from the French tape-tête, meaning "head hit".
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. List of major tributaries
Willamette Valley map showing main stem and major tributaries. The Willamette River drains a region of 11,478 square miles (29,730 km 2), which is 12 percent of the total area of Oregon. [4] Bounded by the Coast Range to the west and the Cascade Range to the east, the river basin is about 180 miles (290 km) long and 100 miles (160 km) wide. [13]
Image Crossing Carries Location River mile Year built Coordinates OR 99E bridge OR 99E, sidewalk : Harrisburg: 161.2 1925 Oregon Electric rail bridge; former vertical-lift type, now fixed in place
The Willamette Valley (/ w ɪ ˈ l æ m ɪ t / ⓘ wil-AM-it) is a 150-mile (240 km) long valley in Oregon, in the Pacific Northwest region of the United States. The Willamette River flows the entire length of the valley and is surrounded by mountains on three sides: the Cascade Range to the east, the Oregon Coast Range to the west, and the ...
River miles are used in a variety of ways. The Commonwealth of Pennsylvania, in its 2001 Pennsylvania Gazetteer of Streams, lists every named stream and every unnamed stream in a named geographic feature in the state, and gives the drainage basin area, mouth coordinates, and river mile, specifically the distance from the mouth of the tributary to the mouth of its parent stream. [1]
Amon Creek is the largest tributary of the Lower Yakima River [4] in Benton County, Washington. From the source of its East Fork to its mouth at the Yakima, it flows about 13 miles (21 km), passing through Kennewick and Richland. The East Fork as well as the main course north of where both forks come together flow south to north.