Miller Reservoir (Blaine) Reservoir Report

Last Updated: December 6, 2025

Miller Reservoir in Blaine, Montana, is a privately owned water resource managed by the Montana Department of Natural Resources and Conservation.


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Summary

Completed in 1954, this earth dam stands at 30 feet high with a capacity of 123 acre-feet, primarily serving as a fire protection and stock watering source. Located in Fort Belknap, the reservoir is situated along the Martin Lake Coulee and covers an area of approximately 400 feet in length.

Despite its low hazard potential, Miller Reservoir plays a crucial role in providing water for fire suppression and livestock needs in the region. With state regulation and inspection in place, the dam ensures the safety and efficiency of its operations. The reservoir's strategic location and purpose make it a valuable asset for maintaining water resources in the area, especially during times of climate variability and increasing water demands.

As a vital component of the local water infrastructure, Miller Reservoir contributes to the resilience of the community by offering a reliable water source for both emergency response and agricultural activities. The dam's construction and management reflect a proactive approach to water resource management, aligning with state regulations and guidelines to ensure the safety and sustainability of the reservoir for years to come. For water resource and climate enthusiasts, Miller Reservoir serves as a prime example of effective water management practices in the face of changing environmental conditions.

Year Completed

1954

Dam Length

400

Dam Height

30

River Or Stream

MARTIN LAKE COULEE

Primary Dam Type

Earth

Hydraulic Height

25

Nid Storage

123

Hazard Potential

Low

Nid Height

30
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.