Bomber Reservoir Report
Last Updated: December 20, 2025
Bomber is a privately owned earth dam located in Nashua, Montana, along the Hay Coulee river stream.
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Summary
Completed in 1953, this dam stands at a height of 13 feet and has a length of 2199 feet, providing flood risk reduction for the surrounding area. With a storage capacity of 600 acre-feet, Bomber plays a crucial role in managing water resources in Valley County.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Bomber is regulated, permitted, inspected, and enforced by the state to ensure its safety and functionality. Despite being rated as having a low hazard potential, the dam's condition assessment is currently not rated, highlighting the need for ongoing monitoring and maintenance. As a key infrastructure for flood risk management, Bomber serves as a vital component in the water resource management of the region, contributing to the overall resilience to climate-related challenges.
With Congressman Greg Gianforte representing the area, Bomber remains an essential structure for the community's safety and well-being. As water resource and climate enthusiasts, understanding the significance of dams like Bomber in mitigating flood risks and managing water resources is crucial for building a sustainable and resilient future in the face of changing climate patterns.
Year Completed |
1953 |
Dam Length |
2199 |
Dam Height |
13 |
River Or Stream |
HAY COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
600 |
Hazard Potential |
Low |
Nid Height |
13 |
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.
Bomber