Montgomery #1 Reservoir Report
Nearby: Whaley #10 Swart #10
Last Updated: December 7, 2025
Montgomery #1 is a privately owned dam located in Rosebud, Montana, along the TR-Horse Creek.
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Summary
Built in 1950, this Earth dam stands at a height of 14 feet and has a storage capacity of 90 acre-feet, with a normal storage level of 44 acre-feet. The primary purposes of the dam are for fire protection, stock, or a small fish pond, serving as a crucial resource for the community.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Montgomery #1 is regulated and inspected regularly to ensure its safety and compliance with state laws. With a low hazard potential and a current condition assessment of "Not Rated," the dam plays a vital role in water resource management in the area. Despite not having a detailed risk assessment or emergency action plan in place, the dam continues to provide essential services to the local residents.
In the congressional district of Montana, Montgomery #1 is overseen by Congressman Greg Gianforte. As an important water infrastructure for the region, the dam contributes to the overall water resource management and climate resilience efforts in the area. With its historical significance and ongoing regulatory oversight, Montgomery #1 remains a key asset for the community's water needs and environmental sustainability goals.
Year Completed |
1950 |
Dam Length |
200 |
Dam Height |
14 |
River Or Stream |
TR-HORSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
90 |
Hazard Potential |
Low |
Nid Height |
14 |
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.
Montgomery #1