Clymers Basin Dam Reservoir Report
Last Updated: January 11, 2026
Clymers Basin Dam, also known as Michigan Limestone, is a private-owned structure located in Presque Isle, Michigan, along a tributary to Lake Huron.
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Summary
Built in 1999, this Earth-type dam stands at a structural height of 65 feet and spans a length of 6346 feet. With a primary purpose of tailings management, the dam has a storage capacity of 1950 acre-feet and a maximum storage of 2275 acre-feet, serving as a crucial infrastructure for water resource management in the region.
Managed by the Michigan Department of Environment, Great Lakes, and Energy, Clymers Basin Dam is subject to state regulations, inspections, and enforcement to ensure its safe operation. Despite its low hazard potential and satisfactory condition assessment, the dam's risk assessment indicates a moderate level of risk, highlighting the importance of ongoing monitoring and risk management measures. With an uncontrolled spillway and emergency action plan status unclear, stakeholders must prioritize preparedness and safety protocols to mitigate potential risks associated with this vital water resource structure.
As a key component of the water management system in the area, Clymers Basin Dam plays a critical role in maintaining water levels and preventing flooding, while also supporting environmental conservation efforts. With its location near Lake Huron and the Detroit District of the US Army Corps of Engineers, the dam is a significant asset for the region's water supply and climate resilience strategies. Continuous monitoring and maintenance will be essential to ensure the long-term safety and effectiveness of this important infrastructure for water resource and climate enthusiasts alike.
Year Completed |
1999 |
Dam Length |
6346 |
Dam Height |
65 |
River Or Stream |
Trib to Lake Huron |
Primary Dam Type |
Earth |
Surface Area |
65 |
Hydraulic Height |
60 |
Drainage Area |
0.1 |
Nid Storage |
2275 |
Structural Height |
65 |
Hazard Potential |
Low |
Nid Height |
65 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Thunder Bay River At Herron Road Near Bolton
|
365cfs |
Pigeon R At Sturgeon Valley Rd Near Vanderbilt
|
98cfs |
Sturgeon River At Wolverine
|
282cfs |
Au Sable River At Mio
|
1230cfs |
Au Sable River Near Mc Kinley
|
1450cfs |
Au Sable River Near Red Oak
|
1110cfs |
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.
Clymers Basin Dam