Mason Reservoir Report
Nearby: Adidias N E Olsen #1
Last Updated: December 6, 2025
Mason is a privately owned water resource structure located in Garfield, Montana, along the TR-Frazier Creek.
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Summary
Built in 1937, this Earth dam stands at a height of 10 feet and has a length of 300 feet, providing essential services for fire protection, stock, and small fish pond purposes. With a maximum storage capacity of 62 acre-feet and a normal storage capacity of 32 acre-feet, Mason plays a crucial role in meeting the water needs of the surrounding area.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Mason is classified as a low hazard potential structure with a current condition assessment of "Not Rated." While the dam has not been inspected recently and lacks emergency action plans and risk assessment measures, its overall risk management is not fully documented. Despite these gaps, Mason continues to serve its primary functions effectively, highlighting the importance of regular monitoring and maintenance to ensure the safety and sustainability of this vital water resource.
As a focal point for fire protection, livestock management, and recreational activities, Mason's significance extends beyond its physical structure. The dam's location within the Omaha District and Congressional District 00 of Montana underscores its importance in water resource management and climate adaptation efforts. With its historical legacy and ongoing operational challenges, Mason represents a key site for water resource and climate enthusiasts to engage in discussions on infrastructure resilience and sustainable water use practices.
Year Completed |
1937 |
Dam Length |
300 |
Dam Height |
10 |
River Or Stream |
TR-FRAZIER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
10 |
Nid Storage |
62 |
Hazard Potential |
Low |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nelson Creek Near Van Norman Mt
|
33cfs |
Milk River At Nashua Mt
|
233cfs |
Redwater River At Circle Mt
|
1cfs |
Milk River At Tampico Mt
|
123cfs |
Musselshell River At Mosby Mt
|
12cfs |
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.
Mason