Minutemen Reservoir Report
Nearby: Lobella Detention Dam Rattlesnake Dam
Last Updated: January 12, 2026
Minutemen is a private irrigation dam located in Prairie, Montana, along the TR-Cedar Creek river.
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Summary
Built in 1952 by the USDA NRCS, this earth dam stands at a height of 30 feet and spans 300 feet in length, with a storage capacity of 107 acre-feet. The dam serves the primary purpose of irrigation, providing water for agricultural activities in the region.
Managed by the DNRC, Minutemen is regulated, permitted, inspected, and enforced by the state of Montana. With a low hazard potential and a condition assessment that is currently not rated, the dam plays a crucial role in water resource management in the area. Although not operated by the USACE, it meets state guidelines and serves as a vital infrastructure for the local community.
Minutemen's location in Glasgow, Montana, makes it a key feature in the region's water resource infrastructure. With its capacity to store water for irrigation purposes and its state-regulated status ensuring safety and compliance, the dam stands as a testament to sustainable water management practices in the area. Its construction by the USDA NRCS underscores the importance of collaboration between private owners and government agencies in maintaining vital water resources for the community.
Year Completed |
1952 |
Dam Length |
300 |
Dam Height |
30 |
River Or Stream |
TR-CEDAR CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Drainage Area |
5.7 |
Nid Storage |
107 |
Hazard Potential |
Low |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yellowstone River At Glendive Mt
|
6000cfs |
Beaver Creek Nr Trotters
|
0cfs |
Powder River Near Locate Mt
|
231cfs |
Little Missouri River At Marmarth
|
12cfs |
Little Missouri River At Medora
|
64cfs |
Deep Creek Nr Amidon
|
0cfs |
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.
Minutemen