Coal Mine Lake Dam Reservoir Report
Nearby: Bennett Wetland Crystal Lake Dam 2
Last Updated: December 13, 2025
The Coal Mine Lake Dam in North Dakota, completed in 1936, serves as a vital resource for fish and wildlife conservation, with a primary purpose of creating a pond for these species.
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Summary
The dam, made of Roller-Compacted Concrete, stands at a height of 8 feet and has a storage capacity of 8,775 acre-feet. The dam is also equipped with a controlled spillway with a width of 50 feet to manage water flow and prevent overflow.
Located in Sheridan County, North Dakota, the Coal Mine Lake Dam sits on the Sheyenne River and is regulated by the North Dakota State Water Commission. Despite being categorized as having a low hazard potential, the dam is considered to have a very high risk assessment, which suggests the need for careful monitoring and maintenance. With a surface area of 1,162 acres and a drainage area of 0.39 square miles, the dam plays a crucial role in the local ecosystem and water management efforts in the region.
Overall, the Coal Mine Lake Dam is an essential structure for wildlife preservation and water resource management in North Dakota. With its focus on fish and wildlife conservation, the dam serves as a key component of the state's efforts to protect and sustain its natural habitats. Despite its low hazard potential, the dam's high risk assessment underscores the importance of ongoing monitoring and maintenance to ensure its continued effectiveness and safety for both wildlife and nearby communities.
Year Completed |
1936 |
Dam Height |
8 |
River Or Stream |
SHEYENNE RIVER |
Primary Dam Type |
Other |
Surface Area |
1162 |
Drainage Area |
0.39 |
Nid Storage |
8775 |
Outlet Gates |
Vertical Lift |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
8 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sheyenne River Above Harvey
|
7cfs |
Wintering River Nr Karlsruhe
|
48cfs |
Souris River Nr Verendrye
|
18cfs |
Little Coulee Nr Leeds
|
0cfs |
Souris River Nr Bantry
|
73cfs |
James River Nr Grace City
|
46cfs |
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.
Coal Mine Lake Dam