Eau Claire River Reservoir Report

Last Updated: December 13, 2025

The Eau Claire River, located in Eau Claire, Wisconsin, is a popular destination for water resource and climate enthusiasts.


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Summary

This river, also known as Augusta, is owned by the local government and primarily used for recreation. The Eau Claire River is a Gravity type dam with a height of 40 feet and a hydraulic height of 25 feet, providing a maximum storage capacity of 17,000 acre-feet and a normal storage capacity of 7,200 acre-feet.

Constructed in 1937, the Eau Claire River dam has a length of 270 feet and a drainage area of 605 square miles. With a maximum discharge of 25,300 cubic feet per second, the dam has a controlled spillway type. Despite being rated as having a high hazard potential, the Eau Claire River dam is in satisfactory condition as of the last assessment in February 2019. The river has a risk assessment of "Very High" and is under the jurisdiction of the state of Wisconsin for permitting and enforcement purposes. Enthusiasts can enjoy the beauty and recreational opportunities offered by the Eau Claire River while being mindful of its potential risks and management measures in place.

Years Modified

1964 - Other, 1975 - Other, 1996 - Other, 2000 - Other, 2009 - Other, 2016 - Other

Year Completed

1937

Dam Length

270

Dam Height

40

River Or Stream

Eau Claire River

Primary Dam Type

Gravity

Surface Area

1118

Hydraulic Height

25

Drainage Area

605

Nid Storage

17000

Structural Height

40

Hazard Potential

High

Nid Height

40
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.