Summary
Constructed in 1952 by the USDA NRCS, Benson serves the primary purpose of irrigation along Hoffman Gulch, with a storage capacity of 107 acre-feet. The dam, measuring 35 feet in height and 150 feet in length, plays a crucial role in supporting agricultural activities in the Beaverhead County area.
Owned privately and regulated by the Montana DNRC, Benson is classified as a low hazard potential structure with a condition assessment of 'Not Rated'. Despite its age, the dam continues to provide essential water resources to the surrounding community, highlighting the importance of regular inspection and maintenance. As a key component of the local water infrastructure, Benson contributes to the overall sustainability and resilience of the region in the face of changing climate patterns and increasing water demands.
With a spillway width of 20 feet and a maximum discharge capacity of 260 cubic feet per second, Benson is equipped to handle potential flood events and ensure the safety of downstream areas. While the dam's emergency action plan and risk assessment details are currently not available, its presence underscores the critical role of infrastructure in mitigating the impacts of climate change on water resources. As water enthusiasts and climate advocates continue to monitor and support sustainable water management practices, structures like Benson serve as vital assets in safeguarding our water supply for future generations.
Year Completed |
1952 |
Dam Length |
150 |
Dam Height |
35 |
River Or Stream |
HOFFMAN GULCH |
Primary Dam Type |
Earth |
Hydraulic Height |
35 |
Drainage Area |
3.7 |
Nid Storage |
107 |
Hazard Potential |
Low |
Nid Height |
35 |
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.
Benson