Preserve Of Dexter Dam Reservoir Report

Last Updated: December 5, 2025

The Preserve of Dexter Dam, also known as Crystal Lake Dam, is a privately owned structure located in Washtenaw County, Michigan.


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Summary

Situated on an unnamed tributary to the Huron River, this dam is regulated by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE). With a height of 33 feet and a storage capacity of 170 acre-feet, the dam serves a primarily low hazard potential and has not been rated for condition assessment.

Although the dam's primary purpose and construction details are unspecified, it is clear that the Preserve of Dexter Dam plays a crucial role in managing water resources in the area. Despite its high risk assessment due to a lack of updated emergency action plans and inundation maps, the dam remains an essential feature for the local ecosystem and climate resilience efforts. With adequate regulatory oversight and inspection frequency of 5 years, the dam continues to provide vital water storage and flood control benefits for the community.

As water resource and climate enthusiasts explore the nuances of the Preserve of Dexter Dam, it becomes evident that this structure is not just a physical barrier but a key component of sustainable water management strategies in Michigan. With its low hazard potential and high risk assessment, there is a clear need for continued monitoring and risk management measures to ensure the safety and functionality of this important dam. By staying informed and engaged with the regulatory processes and updates for the Preserve of Dexter Dam, stakeholders can contribute to the preservation of water resources and climate resilience in the region.

Dam Height

33

River Or Stream

Unnamed Trib to Huron River

Surface Area

13

Hydraulic Height

33

Nid Storage

170

Structural Height

33

Hazard Potential

Low

Nid Height

33
       
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.