Willow Reservoir

The Willow Reservoir or Willow Flowage is an artificial lake in Oneida County, Wisconsin formed by a dam on the Tomahawk River. The dam and reservoir level are controlled by the Wisconsin Valley Improvement Company as part of regulating the overall flow of the upper Wisconsin River. When full, Willow Reservoir has a surface area of 6306 acres.^[1]

Willow Reservoir
Willow Reservoir Show map of Wisconsin Willow Reservoir Show map of the United States
Location	Oneida County, Wisconsin
Coordinates	45.718611°N 89.881944°W / 45.718611; -89.881944
Type	reservoir
Primary inflows	Tomahawk River, Willow River and Swampsauger Creek
Basin countries	United States
Surface area	6,306 acres (2,552 ha)
Max. depth	30 ft (9.1 m)
Water volume	64,644 acre⋅ft (79,737,000 m3)
Shore length1	79.2 mi (127.5 km)
Surface elevation	1,522 ft (464 m)
1 Shore length is not a well-defined measure.

Other major inflows to the Willow Reservoir are the Willow River and Swampsauger Creek.