Cottage Grove Lake Nr Cottage Grove Reservoir Levels

USGS 14153000 Reservoir Water Levels and Forecast

Last Updated: November 9, 2025


COTTAGE GROVE LAKE NR COTTAGE GROVE satellite preview
COTTAGE GROVE LAKE NR COTTAGE GROVE map preview

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Cottage Grove Lake is a reservoir located in Lane County, Oregon. The lake was created in 1942 by the construction of Cottage Grove Dam on the Coast Fork Willamette River. The dam's primary purpose is to provide flood control and hydroelectric power to the region. The lake's hydrology is influenced by its location in the Coast Range, which receives significant amounts of precipitation. The primary surface flow provider is the Coast Fork Willamette River, while snowpack also contributes to the lake's water supply. The lake is used for a variety of recreational activities, including boating, fishing, and swimming, and it also provides irrigation water for nearby agricultural operations. The area surrounding the lake is home to a variety of wildlife, including bald eagles and otters.

Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft 24hr Change 0.01%
Percent of Normal 100%
Minimum 743.62 ft
2021-10-22
Maximum 791.18 ft
2022-06-13
Average 750 ft
Dam_Height 81
Hydraulic_Height 76
Drainage_Area 104
Year_Completed 1942
Nid_Storage 50000
Structural_Height 103
Foundations Rock, Soil
Surface_Area 1158
River_Or_Stream COAST FORK WILLAMETTE RIVER
Dam_Length 2110
Hazard_Potential High
Primary_Dam_Type Earth
Nid_Height 103
       
Seasonal Comparison
Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft Levels

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