Ray Reservoir Report
Nearby: Dolabriform Three Pronged Fork Dam
Last Updated: December 5, 2025
Ray is a privately-owned earth dam located in Loma, Montana, with a primary purpose of fire protection, stock, or small fish pond.
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Summary
Built in 1956 by the USDA NRCS, this dam stands at a height of 12 feet and has a length of 340 feet, providing a storage capacity of 91 acre-feet. It is regulated by the DNRC and is situated on the TR-Dug Out Coulee river or stream.
With a low hazard potential and a moderate risk assessment rating, Ray dam plays a crucial role in water resource management in Chouteau County. Despite not being currently rated for its condition, this dam serves as a vital infrastructure for fire protection and livestock water supply in the area. Enthusiasts interested in water resource and climate change will find Ray dam to be a fascinating case study of a privately-owned structure contributing to the local ecosystem's sustainability.
Year Completed |
1956 |
Dam Length |
340 |
Dam Height |
12 |
River Or Stream |
TR-DUG OUT COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Drainage Area |
7.81 |
Nid Storage |
91 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Marias River Near Chester Mt
|
249cfs |
Teton River Near Dutton Mt
|
83cfs |
Marias River Near Loma Mt
|
335cfs |
Missouri River At Fort Benton Mt
|
4720cfs |
Teton River At Loma Mt
|
30cfs |
Lake Creek Near Power Mt
|
30cfs |
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.
Ray