Slim Creek Reservoir Report

Last Updated: December 5, 2025

Slim Creek, located in Washburn, Wisconsin, is a gravity dam completed in 1936 with a primary purpose of recreation.


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Summary

With a height of 15 feet and a storage capacity of 850 acre-feet, this dam serves as a vital water resource for the local community. The dam also boasts a controlled spillway and a maximum discharge of 700 cubic feet per second, ensuring effective water management in the area.

Despite its fair condition assessment, Slim Creek's hazard potential is classified as high, indicating the need for ongoing monitoring and maintenance. The risk assessment labels it as very high, underlining the importance of implementing risk management measures to mitigate potential dangers. With its scenic location and recreational opportunities, Slim Creek serves as both a valuable water resource and a potential risk management challenge for the community.

Managed by the Wisconsin Department of Natural Resources, Slim Creek offers a glimpse into the intersection of water resource management and climate resilience. As climate change continues to impact water availability and quality, understanding and safeguarding dams like Slim Creek becomes increasingly crucial for ensuring sustainable water management practices in the face of evolving environmental challenges.

Year Completed

1936

Dam Length

120

Dam Height

15

River Or Stream

SLIM CREEK

Primary Dam Type

Gravity

Surface Area

101

Hydraulic Height

12

Drainage Area

17

Nid Storage

850

Structural Height

15

Hazard Potential

High

Nid Height

15
       
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.