Airpump Reservoir Report
Last Updated: December 5, 2025
Located in the picturesque city of Twodot, Montana, the Airpump dam is a privately owned structure primarily used for fire protection, stock watering, and as a small fish pond.
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Summary
Built in 1965, this earth dam stands at a height of 20 feet and has a storage capacity of 227 acre-feet. Situated on the TR-Little Elk Creek, the dam serves as a vital resource for the surrounding community, offering essential water storage for various purposes.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), the Airpump dam is subject to state regulations and inspections to ensure its safety and functionality. With a low hazard potential and a current condition assessment of "Not Rated," the dam provides a reliable water source while posing minimal risk to the environment and nearby residents. Despite its age, the Airpump dam continues to play a crucial role in water resource management in Wheatland County, Montana.
As water resource and climate enthusiasts explore the intricate network of dams in the region, the Airpump dam stands out for its unique combination of functions and its historical significance. With its modest size and practical design, this structure exemplifies the balance between human needs and environmental stewardship. As efforts continue to monitor and maintain the dam, it remains a symbol of sustainable water management in the heart of the Montana wilderness.
Year Completed |
1965 |
Dam Length |
100 |
Dam Height |
20 |
River Or Stream |
TR-LITTLE ELK CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
227 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Airpump