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The gradient is slightly steeper from the source to Albany than from Albany to Oregon City. At Willamette Falls, the river plunges about 40 feet (12 m). For the rest of its course, the river is extremely low-gradient and is influenced by Pacific Ocean tidal effects from the Columbia. The main stem of the Willamette varies in width from about ...
Aerial view of crossings in downtown Portland. This is a list of bridges and other crossings of the Willamette River in the U.S. state of Oregon from the Columbia River upstream to the confluence of the Middle Fork Willamette River and Coast Fork Willamette River.
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]
Stephens Creek, a 2-mile (3 km) tributary of the Willamette River, flows entirely within the city of Portland in the U.S. state of Oregon. [6] Beginning in the neighborhood of Hillsdale, it runs generally east through residential and commercial neighborhoods as well as patches of forest and parkland to join the Willamette slightly north of the Sellwood Bridge. [6]
Overview of Oregon river drainage basins. This is a partial listing of rivers in the state of Oregon, United States.This list of Oregon rivers is organized alphabetically and by tributary structure.
The Coast Fork Willamette River is formed in southwestern Lane County, in the Calapooya Mountains, by the confluence of the Little River and the Big River.The Coast Fork flows north through the mountains, through the Cottage Grove Lake reservoir, to Cottage Grove, where it receives the Row River from the southeast.
Champoeg Creek is a tributary, roughly 6 miles (9.7 km) long, of the Willamette River in the U.S. state of Oregon.The creek is formed by the confluence of its two forks in the French Prairie region of the Willamette Valley and flows generally northeast to meet the Willamette 45 miles (72 km) from the river's confluence with the Columbia River.
The river has Oregon's longest covered bridge crossing it at Westfir, the Office Bridge. [3] Portions of the river were designated wild and scenic in 1988. [ 4 ] [ 5 ] The portion from Waldo Lake to 1 mile (1.6 km) upstream from Westfir is designated scenic by the State of Oregon [ 6 ] and is known for its native trout by fly fishermen.