Spring-Miller Reservoir Report
Nearby: Pink Skeeter #2 Dirty Wash Reservoir
Last Updated: December 6, 2025
Spring-Miller is a privately owned dam located in Garfield County, Montana, along the TR-South Fork Box Creek.
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Summary
Built in 1958, this earth dam stands at a height of 25 feet and serves multiple purposes, including fire protection, stock watering, and maintaining a small fish pond. With a storage capacity of 43 acre-feet, the dam has a low hazard potential and is currently deemed to be in "Not Rated" condition.
This structure is regulated by the Montana Department of Natural Resources and Conservation (DNRC), with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations. The dam is situated in a remote area with no nearby town, adding to its wilderness allure and providing valuable water resources for the surrounding environment. Despite its low hazard potential, Spring-Miller plays a crucial role in water management and conservation efforts in the region.
Overall, Spring-Miller represents a blend of functionality and natural beauty, serving as a vital resource for fire protection, livestock, and wildlife in the area. With its historical significance dating back to the late 1950s, this dam continues to be a key feature in the local ecosystem and a testament to the importance of responsible water resource management in the face of changing climate conditions.
Year Completed |
1958 |
Dam Length |
148 |
Dam Height |
25 |
River Or Stream |
TR-SOUTH FORK BOX CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
43 |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nelson Creek Near Van Norman Mt
|
33cfs |
Milk River At Nashua Mt
|
233cfs |
Redwater River At Circle Mt
|
4cfs |
Milk River At Tampico Mt
|
123cfs |
Missouri River Near Wolf Point Mt
|
5020cfs |
Beaver Creek Near Hinsdale Mt
|
1cfs |
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.
Spring-Miller