Thompson Dam Reservoir Report
Nearby: Lost Lake Woods East Dam Kelsey Dam
Last Updated: December 5, 2025
Thompson Dam, also known as Hubbard Lake Walleye Pond, is a privately owned structure located in Spruce, Michigan.
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Summary
Completed in 1979, this earth dam stands at a height of 12 feet and stretches 400 feet in length, with a maximum storage capacity of 70 acre-feet. Situated on a tributary to Devils River, the dam serves various purposes beyond flood control, although it is classified as having a low hazard potential.
Managed by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE), Thompson Dam is subject to state regulatory oversight, including permitting, inspection, and enforcement. While the dam's condition is currently not rated, it undergoes inspections every five years to ensure its structural integrity and safety. With a moderate risk assessment rating, Thompson Dam is equipped with an uncontrolled spillway and has a maximum discharge capacity of 270 cubic feet per second.
For water resource and climate enthusiasts, Thompson Dam presents an intriguing case study in dam management and risk assessment. Its location within the Buffalo District of the US Army Corps of Engineers and its association with the Devils River watershed highlight the interconnected nature of water infrastructure and environmental conservation. As efforts to mitigate climate change and safeguard water resources intensify, the maintenance and monitoring of structures like Thompson Dam play a vital role in ensuring the resilience of our hydrological systems.
Year Completed |
1979 |
Dam Length |
400 |
Dam Height |
12 |
River Or Stream |
Tributary to Devils River |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
12 |
Drainage Area |
0.8 |
Nid Storage |
70 |
Structural Height |
12 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Thunder Bay River At Herron Road Near Bolton
|
365cfs |
Au Sable River Near Mc Kinley
|
965cfs |
Au Sable River Near Curtisville
|
838cfs |
Au Sable River Near Au Sable
|
883cfs |
Au Sable River At Mio
|
665cfs |
Au Sable River Near Red Oak
|
609cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Thompson Dam