Miller Dam; Rich Reservoir Report
Nearby: Rundle Dam; Earl 1 Hanson Dam; Kenny
Last Updated: December 6, 2025
Miller Dam; Rich is a private dam located in Slope, North Dakota, along the Cannonball River.
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Summary
Built in 2012 by the USFWS, the dam serves as a Fish and Wildlife Pond with a primary purpose of supporting the local ecosystem. Standing at 18.9 feet high and 670 feet long, the earth dam holds a maximum storage capacity of 118.1 acre-feet and covers a surface area of 12.4 acres.
Managed by the North Dakota State Water Commission, Miller Dam is regulated, permitted, inspected, and enforced to ensure its safety and compliance with state guidelines. With a low hazard potential and a moderate risk assessment rating, the dam poses minimal risks to surrounding areas. Although its condition is currently not rated, the dam is regularly monitored to prevent any potential issues and ensure its long-term functionality.
Located within the jurisdiction of the Omaha District of the US Army Corps of Engineers, Miller Dam; Rich plays a crucial role in supporting local wildlife and maintaining the ecological balance along the Cannonball River. Enthusiasts of water resources and climate will appreciate the efforts put into constructing and managing this vital structure for the benefit of the environment and the community.
Year Completed |
2012 |
Dam Length |
670 |
Dam Height |
18.9 |
River Or Stream |
CANNONBALL RIVER-TR |
Primary Dam Type |
Earth |
Surface Area |
12.4 |
Nid Storage |
118.1 |
Structural Height |
21.9 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
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.
Miller Dam; Rich