Kallstrom Mercer Group Reservoir Report

Last Updated: December 11, 2025

The Kallstrom Mercer Group in Pepin, Wisconsin, is a privately owned structure designed by the USDA NRCS for fire protection, stock, or small fish pond purposes.


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Summary

The dam, completed in 1967, stands at a height of 35 feet with a length of 370 feet and a storage capacity of 49 acre-feet. Situated on Bearpen Coulee Creek, the dam serves as a recreational area in addition to its primary functions.

Managed by the WIDNR, the Kallstrom Mercer Group dam is regulated, inspected, and enforced by state agencies to ensure its safety and compliance with regulations. With a low hazard potential but a very high risk assessment rating, the dam is monitored regularly with an inspection frequency of 10 years. Despite its low hazard potential, the dam poses a significant risk due to its location and structural characteristics.

As water resource and climate enthusiasts, understanding the intricacies of dams like the Kallstrom Mercer Group is crucial for monitoring and managing water resources effectively. By staying informed about the dam's condition, purpose, and regulatory oversight, enthusiasts can contribute to the sustainable and responsible use of water in the region.

Year Completed

1967

Dam Length

370

Dam Height

35

River Or Stream

BEARPEN COULEE CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

35

Drainage Area

1.2

Nid Storage

49

Structural Height

35

Hazard Potential

Low

Nid Height

35
       
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.