Opp Dam; Kevin 1 Reservoir Report
Last Updated: December 8, 2025
Opp Dam, also known as Kevin 1, is a private-owned structure located in North Dakota along the Heart Butte Creek-TR.
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Summary
Designed by USFWS and completed in 1991, this Earth-type dam serves as a Fish and Wildlife Pond with a storage capacity of 50.7 acre-feet. With a low hazard potential and moderate risk assessment, the dam has a spillway width of 50 feet and is not equipped with outlet gates.
Managed by the North Dakota State Water Commission, Opp Dam plays a crucial role in managing water resources in the area. Its primary purpose is to support fish and wildlife habitats, making it a vital component of the local ecosystem. Despite being uncontrolled, the dam is periodically inspected, regulated, and permitted to ensure its structural integrity and safety.
For water resource and climate enthusiasts, Opp Dam offers a fascinating glimpse into the intersection of human infrastructure and environmental conservation. Its presence not only provides valuable habitat for aquatic species but also highlights the importance of sustainable water management practices in maintaining ecological balance. With its unique design and purpose, Opp Dam stands as a testament to the harmonious coexistence of human needs and natural ecosystems.
Year Completed |
1991 |
Dam Height |
7.1 |
River Or Stream |
HEART BUTTE CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
6.8 |
Drainage Area |
1.1 |
Nid Storage |
50.7 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
7 |
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.
Opp Dam; Kevin 1