Coon Creek 25 Reservoir Report

Last Updated: December 5, 2025

Coon Creek 25, also known as Baltz/Amundson, is a crucial flood risk reduction structure located in Monroe, Wisconsin.


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Summary

Owned by the local government and regulated by the Wisconsin Department of Natural Resources, this earth-type dam stands 38 feet tall and stretches 430 feet in length. Completed in 1961, it serves the primary purpose of debris control and flood risk reduction along the TR Rulland Coulee Creek.

With a maximum storage capacity of 78.2 acre-feet and a low hazard potential, Coon Creek 25 plays a significant role in managing water resources in the area. Despite having a fair condition assessment as of August 2017, regular inspections are conducted every 10 years to ensure its structural integrity. The dam's moderate risk assessment indicates the need for continued risk management measures to maintain its effectiveness in safeguarding the community from potential flood events.

Located within the St. Paul District of the US Army Corps of Engineers, Coon Creek 25 stands as a testament to the collaborative efforts of various agencies in safeguarding the local environment and population. As climate change continues to impact water resources, structures like Coon Creek 25 play a vital role in mitigating flood risks and ensuring the resilience of communities in the face of changing weather patterns.

Year Completed

1961

Dam Length

430

Dam Height

38

River Or Stream

TR RULLAND COULEE CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

14

Drainage Area

1

Nid Storage

78.2

Structural Height

38

Hazard Potential

Low

Nid Height

38
       
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.