Completed in 1937, this hydroelectric facility serves multiple purposes, including recreation. With a height of 45 feet and a length of 8,599 feet, the dam has a storage capacity of 98,140 acre-feet and covers a surface area of 6,677 acres. It has a controlled spillway with a width of 88 feet and a maximum discharge of 20,767 cubic feet per second.
Managed by the Federal Energy Regulatory Commission, Eau Pleine is a significant structure in the region, providing power generation and recreational opportunities. Despite its high hazard potential, the dam's condition assessment is not available, and its risk assessment indicates a very high risk level. Emergency action plans have been prepared and updated regularly to ensure the safety of the surrounding communities in case of a catastrophic event. With its historical significance and strategic location, Eau Pleine stands as a key player in water resource management and climate resilience efforts in Wisconsin.
Year Completed |
1937 |
Dam Length |
8599 |
Dam Height |
45 |
River Or Stream |
Big Eau Pleine River |
Primary Dam Type |
Gravity |
Surface Area |
6677 |
Drainage Area |
370 |
Nid Storage |
98140 |
Outlet Gates |
Slide (sluice gate) - 1, Tainter (radial) - 3 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
45 |
Wisconsin River At Rothschild
|
2280cfs |
Eau Claire River At Kelly
|
280cfs |
Big Eau Pleine River At Stratford
|
27cfs |
Rib River At Rib Falls
|
60cfs |
Wisconsin River At Wisconsin Rapids
|
1750cfs |
Tomorrow River Near Nelsonville
|
26cfs |
Big Eau Pleine River -- Access at Near Dam Road
Big Eau Pleine River -- Access at Near County Hwy O
Big Eau Pleine River -- Access at Near Sandy Shore Rd
Wisconsin River -- Access Off Of Beans Eddy Road
Wisconsin River - Lake Du Bay -- Access/Seagull Ramp
Little Eau Pleine River - Highway O Launch (Mead Wildlife Area)