Coteau Prop Dam 1 Reservoir Report
Last Updated: December 14, 2025
Coteau Prop Dam 1, located in Mercer, North Dakota, is a privately owned earth dam constructed in 1998 for recreational purposes.
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Summary
Standing at a height of 32 feet, the dam has a storage capacity of 1,290 acre-feet and covers a surface area of 44.9 acres. It is situated on East Antelope Creek and is regulated by the North Dakota State Water Commission.
With a low hazard potential and a moderate risk assessment rating, Coteau Prop Dam 1 serves as a vital resource for water storage and recreational activities in the area. The dam features an uncontrolled spillway with a width of 65 feet and is inspected regularly to ensure its structural integrity and safety. Although the condition assessment is not rated, the dam is considered to meet regulatory guidelines and is equipped with emergency preparedness measures.
Despite being a privately owned structure, Coteau Prop Dam 1 plays a crucial role in managing water resources and providing recreational opportunities for the local community. Its location in the St. Paul District and its association with the North Dakota State Water Commission highlight its significance in water resource management and climate resilience efforts in the region.
Year Completed |
1998 |
Dam Height |
32 |
River Or Stream |
EAST ANTELOPE CREEK |
Primary Dam Type |
Earth |
Surface Area |
44.9 |
Drainage Area |
14.8 |
Nid Storage |
1290 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Coteau Prop Dam 1