Langohr #1 Reservoir Report
Last Updated: December 5, 2025
Langohr #1 is a privately owned earth dam located in Rosebud, Montana, along the TR-BUTTE CREEK.
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Summary
Built in 1965, this structure serves multiple purposes including fire protection, stock watering, and small fish pond habitat. With a dam height of 16 feet and a length of 450 feet, it has a storage capacity of 75 acre-feet, with a normal storage level of 32 acre-feet. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected, permitted, and enforced by the state agency to ensure its safety and compliance with regulations.
Despite being rated as having a low hazard potential and not currently assessed for condition, Langohr #1 plays a significant role in water resource management in the region. The dam's location in a rural area means that it may not pose a high risk to populated areas in case of failure, but its importance for local agriculture and wildlife cannot be understated. With its primary purpose being fire protection, as well as providing water for livestock and creating a habitat for small fish, Langohr #1 exemplifies the versatility of small-scale dams in supporting both human and ecological needs.
As an essential infrastructure for the community, Langohr #1 showcases the intersection of water resource management, climate resilience, and environmental stewardship. Its presence along TR-BUTTE CREEK not only helps in mitigating the impacts of drought and wildfires but also contributes to the overall ecological health of the area. By being regulated and inspected by the state, the dam ensures that it continues to serve its intended purposes while minimizing potential risks to the environment and public safety.
Year Completed |
1965 |
Dam Length |
450 |
Dam Height |
16 |
River Or Stream |
TR-BUTTE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
75 |
Hazard Potential |
Low |
Nid Height |
16 |
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.
Langohr #1