Mitchell Dam Reservoir Report

Last Updated: December 5, 2025

Located in Galesburg, Michigan, Mitchell Dam, also known as Territorial Road Dam, is a state-owned structure primarily designated for recreation purposes.


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Summary

Completed in 1996, this earth dam stands at 8.8 feet high with a hydraulic height of 7.25 feet and a length of 825 feet. It holds a maximum storage capacity of 170 acre-feet, with a normal storage level of 85 acre-feet, covering a surface area of 37 acres and draining a 1.67 square mile watershed that feeds into a tributary of the Kalamazoo River.

With a low hazard potential and a moderate risk assessment rating, Mitchell Dam is not currently regulated or inspected by the state of Michigan, and does not have an established Emergency Action Plan in place. Despite its minimal risk profile, the dam's uncontrolled spillway with a width of 103 feet could potentially discharge up to 218 cubic feet per second in the event of heavy rainfall or flooding. While the dam's condition is currently rated as "Not Rated," regular inspections are required every 5 years to ensure its structural integrity and safety for the surrounding community.

Although Mitchell Dam may not be a high-risk structure, its recreational value and environmental impact cannot be understated. As a popular location for outdoor activities and water sports, it is essential for stakeholders and local authorities to prioritize regular maintenance and monitoring to ensure the dam's continued functionality and safety for both residents and wildlife in the region. By staying informed and proactive in managing potential risks, Mitchell Dam can continue to serve as a valuable resource for water recreation enthusiasts and climate advocates alike.

Year Completed

1996

Dam Length

825

Dam Height

8.8

River Or Stream

Trib to Kalamazoo River

Primary Dam Type

Earth

Surface Area

37

Hydraulic Height

7.25

Drainage Area

1.67

Nid Storage

170

Structural Height

8.8

Hazard Potential

Low

Nid Height

9
       
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.