Cottage Grove Lake is a

reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including control ...

on the

Coast Fork Willamette River The Coast Fork Willamette River is one of two forks that unite to form the Willamette River in western Oregon in the United States. It is about long, draining an area of the mountains at the south end of the Willamette Valley south of Eugene. Cou ...

in Lane County,

Oregon Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idah ...

, United States. The lake is about long. Cottage Grove Dam, which impounds the lake, is long and high. It was completed in 1942 as one of the 13 dams built by the

United States Army Corps of Engineers , colors = , anniversaries = 16 June (Organization Day) , battles = , battles_label = Wars , website = , commander1 = ...

in the

Willamette River The Willamette River ( ) is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is long, lying entirely in northwestern Oregon in the United States. Flowing northward ...

basin. It is about south of Cottage Grove at

river mile A river mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the river kilometer. They are analogous to vehicle roadw ...

29 (kilometer 47). The dam's main function, in conjunction with the Dorena Dam on the

Row River The Row River is a river, approximately long, in Lane County, Oregon, United States. It rises in the Cascade Range and flows into the Coast Fork Willamette River near Cottage Grove. The stream was originally known as the "East Fork Coast Fork", ...

, a Coast Willamette

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainag ...

, is flood control. Other functions are to supply water for irrigation and improved river navigation. The lake and its surrounds are used for recreation, including boating, camping, fishing, picnicking, and bird-watching.

References

{{authority control Dams in Oregon United States Army Corps of Engineers dams Reservoirs in Oregon Lakes of Lane County, Oregon Buildings and structures in Lane County, Oregon Dams completed in 1942 1942 establishments in Oregon

See also

References