Cottage Grove Lake

Cottage Grove Lake is a reservoir on the Coast Fork Willamette River in Lane County, Oregon, United States.^[1] The lake is about 3 miles (4.8 km) long.^[2]

Cottage Grove Lake
Cottage Grove Dam and Lake
Cottage Grove Lake Location of Cottage Grove Lake in Oregon Show map of Oregon Cottage Grove Lake Cottage Grove Lake (the United States) Show map of the United States
Location	Lane County, Oregon, United States
Coordinates	43°42′55″N 123°03′02″W
Type	Mesotrophic reservoir
Primary inflows	Coast Fork Willamette River
Primary outflows	Coast Fork Willamette River
Catchment area	106 square miles (270 km2)
Basin countries	United States
Managing agency	U.S. Army Corps of Engineers
Max. length	3 miles (4.8 km)
Surface area	1,025.9 acres (415.2 ha)
Average depth	29 feet (8.8 m)
Max. depth	73 feet (22 m)
Water volume	33,000 acre-feet (41,000,000 m3)
Residence time	2 months
Shore length1	10.6 miles (17.1 km)
Surface elevation	794 feet (242 m)
1 Shore length is not a well-defined measure.

Cottage Grove Dam, which impounds the lake, is 1,750 feet (530 m) long and 95 feet (29 m) high.^[2] It was completed in 1942 as one of the 13 dams built by the United States Army Corps of Engineers in the Willamette River basin.^[1] It is about 5 miles (8 km) south of Cottage Grove at river mile 29 (kilometer 47).^[2]

The dam's main function, in conjunction with the Dorena Dam on the Row River, a Coast Willamette tributary, is flood control.^[1] Other functions are to supply water for irrigation and improved river navigation.^[2] The lake and its surrounds are used for recreation, including boating, camping, fishing, picnicking, and bird-watching.^[2]

See also

• List of lakes in Oregon