Lake Dubonnet Dam Reservoir Report

Last Updated: December 5, 2025

Lake Dubonnet Dam, also known as Mud Lake Dam, is a state-owned earth dam located in Lake Ann, Michigan, along the Platte River.


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Summary

Completed in 1956, this recreational dam stands at a height of 12.5 feet and has a hydraulic height of 11 feet, with a storage capacity of 3,170 acre-feet and a surface area of 645 acres. The dam's primary purpose is for recreation, providing opportunities for boating, fishing, and other water-based activities.

Managed by the Michigan Department of Environment, Great Lakes, and Energy, the Lake Dubonnet Dam is regulated, permitted, inspected, and enforced by the state authorities to ensure its structural integrity and safety. The dam has a low hazard potential and was last inspected in October 2015, with a satisfactory condition assessment. While the risk assessment is moderate, the dam meets guidelines and has emergency preparedness measures in place, indicating a commitment to managing any potential risks associated with the structure.

With its picturesque location in Grand Traverse County, Michigan, the Lake Dubonnet Dam serves as a popular recreational destination for locals and visitors alike. Its serene waters and surrounding natural beauty make it a haven for water resource and climate enthusiasts looking to enjoy outdoor activities in a tranquil setting. As a well-maintained and regulated structure, the dam provides both safety and enjoyment for those who appreciate the importance of sustainable water resource management and environmental conservation.

Year Completed

1956

Dam Length

450

Dam Height

12.5

River Or Stream

Platte River

Primary Dam Type

Earth

Surface Area

645

Hydraulic Height

11

Drainage Area

28.7

Nid Storage

3170

Structural Height

12.5

Hazard Potential

Low

Nid Height

13
       
Seasonal Comparison

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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.