Richard J Trepanier Dam Reservoir Report

Last Updated: December 5, 2025

The Richard J Trepanier Dam, located in Loretto, Michigan, is a private earth dam primarily used for recreation purposes.


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Summary

Built in 1983, this dam stands at a height of 26 feet and has a hydraulic height of 25 feet. With a length of 475 feet and a storage capacity of 25 acre-feet, the dam serves as a key feature in the tributary to Pine Creek, providing a surface area of 4 acres for outdoor activities.

Although the dam has a low hazard potential and is currently not rated in terms of condition assessment, it is inspected every 5 years to ensure its safety and functionality. With a moderate risk assessment rating, the Richard J Trepanier Dam is managed and maintained to mitigate any potential risks and ensure its continued operation for recreational purposes. As a part of the Detroit District, this dam serves as a valuable resource for water enthusiasts and climate advocates in the Dickinson County area.

Overall, the Richard J Trepanier Dam offers a picturesque location for outdoor activities and water recreation in Michigan. Its construction and design are a testament to the importance of managing water resources effectively while balancing the needs of the community for leisure and enjoyment. The dam's presence contributes to the natural beauty of the surrounding area and provides a safe and enjoyable environment for visitors to appreciate and enjoy the wonders of nature.

Year Completed

1983

Dam Length

475

Dam Height

26

River Or Stream

Tributary to Pine Creek

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

25

Drainage Area

1.7

Nid Storage

25

Structural Height

26

Hazard Potential

Low

Nid Height

26
       
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.