Hansen Reservoir Report
Nearby: Waro Reservoir Shotgun Creek Dike #2
Last Updated: December 14, 2025
Hansen is a privately owned earth dam located in Montana, specifically in Roosevelt County near the city of NOHLY.
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Summary
Built in 1940 by the USDA NRCS, this dam serves multiple purposes including fire protection, stock, and small fish pond. It has a dam height of 15 feet and a length of 100 feet, providing a storage capacity of 92 acre-feet. The dam is regulated by the DNRC and is inspected, permitted, and enforced by the state, ensuring its safety and compliance with regulations.
Situated on TR-SHOTGUN CREEK, Hansen plays a crucial role in water resource management in the region, with a drainage area of 0.47 square miles. Despite its low hazard potential, the dam has not been rated for its condition assessment. While it lacks certain emergency preparedness measures such as an EAP and inundation maps, Hansen continues to provide essential services for the community, especially in terms of fire protection and water storage. With its historical significance and functional design, Hansen remains a key structure in the water infrastructure of Montana.
Managed by the Natural Resources Conservation Service, Hansen exemplifies the importance of earth dams in maintaining water resources for various purposes. As climate change impacts water availability and quality, structures like Hansen become increasingly vital for local communities. With its strategic location and state jurisdiction, Hansen stands as a testament to effective water management practices in the face of evolving environmental challenges.
Year Completed |
1940 |
Dam Length |
100 |
Dam Height |
15 |
River Or Stream |
TR-SHOTGUN CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Drainage Area |
0.47 |
Nid Storage |
92 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Hansen