Hanson (Phillips) Reservoir Report
Nearby: Austin Dam Austin #2
Last Updated: December 5, 2025
Hanson (Phillips) is a privately owned dam located in Hinsdale, Montana, along the Clark Coulee.
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Summary
It was completed in 1954 and serves multiple purposes, including fire protection, stock watering, and small fish pond management. The dam is classified as an Earth type structure, with a height of 20 feet and a length of 800 feet. It has a storage capacity of 404 acre-feet, with a normal storage level of 139 acre-feet.
Despite its age, Hanson (Phillips) has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC), with regular inspections, permitting, and enforcement measures in place. While specific information on maintenance and risk management measures is not provided, the dam's emergency action plan status, inundation maps, and overall risk assessment are also marked as unprepared or incomplete.
Located within the Omaha District of the US Army Corps of Engineers, Hanson (Phillips) represents a valuable water resource for the surrounding area. As water resource and climate enthusiasts, it is important to monitor the condition and regulatory oversight of dams like Hanson (Phillips) to ensure their continued safety and functionality for both human and environmental needs.
Year Completed |
1954 |
Dam Length |
800 |
Dam Height |
20 |
River Or Stream |
CLARK COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
404 |
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.
Hanson (Phillips)