Eau Galle Dam Reservoir Report
Nearby: Knights Creek 1 Knights Creek 5
Last Updated: December 12, 2025
Eau Galle Dam, also known as Lake George, is a Federal-owned rockfill dam located in Pierce County, Wisconsin.
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Summary
Completed in 1968 by the US Army Corps of Engineers, the dam stands at a height of 127 feet and has a hydraulic height of 125 feet, serving primarily for flood risk reduction along the Eau Galle River. With a storage capacity of 56,900 acre-feet and a surface area of 880 acres, the dam plays a crucial role in managing water levels and mitigating flood risks in the region.
The dam's emergency action plan (EAP) is regularly updated to meet guidelines and address potential risks associated with its high hazard potential. With a moderate risk assessment score of 3, the US Army Corps of Engineers actively manages flood risks by monitoring the dam's condition, engaging with local emergency managers, and performing regular maintenance and repairs as needed. The dam's spillway type is uncontrolled, with outlet gates including a slide gate, and plays a vital role in managing water discharge during severe weather events to maintain structural integrity and water levels both upstream and downstream.
Overall, Eau Galle Dam serves as a critical infrastructure for flood risk reduction, fish and wildlife habitat enhancement, and recreational purposes in the area. With ongoing risk management measures in place, the dam continues to play a pivotal role in water resource management and climate resilience efforts in the region.
Year Completed |
1968 |
Dam Length |
1800 |
Dam Height |
29 |
River Or Stream |
EAU GALLE |
Primary Dam Type |
Rockfill |
Surface Area |
880 |
Hydraulic Height |
125 |
Drainage Area |
64 |
Nid Storage |
56900 |
Structural Height |
127 |
Outlet Gates |
Slide (sluice gate) - 1, Uncontrolled - 0 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
127 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Eau Galle River At Spring Valley
|
16cfs |
Red Cedar River At Menomonie
|
1050cfs |
Chippewa River At Durand
|
4160cfs |
Hay River At Wheeler
|
235cfs |
Kinnickinnic River Near River Falls
|
115cfs |
Mississippi River At Red Wing
|
12400cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
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