R Myhre #1 Reservoir Report
Nearby: Lazy E Bar 9 Traweek #2
Last Updated: December 5, 2025
R Myhre #1 is a privately-owned dam located in Fallon, Montana, near MARMARTH NORTH DAKOTA.
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Summary
Built in 1945 by USDA NRCS, this earth dam stands at a height of 15 feet and spans a length of 400 feet. It serves multiple purposes including fire protection, stock, and small fish pond maintenance, with a storage capacity of 138 acre-feet and a drainage area of 3.56 square miles.
Situated on TR-LITTLE BEAVER CREEK, this dam has a spillway width of 20 feet and a maximum discharge of 200 cubic feet per second. Its hazard potential is considered significant, with a moderate risk assessment rating of 3. While its condition is currently not rated, it is under state regulation and enforcement by the DNRC, ensuring regular inspections and permitting for continued operation. The dam's location in a climate-sensitive region underscores the importance of its maintenance and risk management measures for water resource and climate enthusiasts.
With its historical significance and crucial role in local water management, R Myhre #1 stands as a testament to the intersection of human infrastructure and natural resources. As a key structure in the area's hydrological landscape, its operations and maintenance are vital for the protection of nearby communities and ecosystems. For those invested in water resource management and climate resilience, this dam serves as a focal point for understanding the complex relationship between infrastructure development and environmental stewardship.
Year Completed |
1945 |
Dam Length |
400 |
Dam Height |
15 |
River Or Stream |
TR-LITTLE BEAVER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Drainage Area |
3.56 |
Nid Storage |
138 |
Hazard Potential |
Significant |
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.
R Myhre #1