Aybee Reservoir Report
Nearby: Beecher #3 Bob #2
Last Updated: December 6, 2025
Aybee is a privately owned earth dam located in Cohagen, Montana, along the TR-Spring Coulee river.
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Summary
Built in 1960, this dam serves multiple purposes including fire protection, stock watering, and creating a small fish pond. With a height of 15 feet and a storage capacity of 62 acre-feet, Aybee provides essential water resources for the local community while also supporting wildlife habitats.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Aybee is classified as having a low hazard potential and is currently in a not rated condition assessment status. Despite its age, the dam continues to play a vital role in water management in the region, with regular state inspections and enforcement to ensure its safety and functionality. The dam's emergency action plan status and risk assessment are currently not available, indicating a need for further evaluation and preparation in case of emergencies.
Located in Garfield County, Montana, Aybee is a key infrastructure for water resource management in the area. As a part of the Omaha District under the US Army Corps of Engineers, this dam is essential for maintaining water levels, supporting agriculture, and protecting against potential water-related hazards. With its historical significance and ongoing importance, Aybee stands as a testament to the vital role that water resources play in supporting communities and ecosystems in the face of changing climate patterns.
Year Completed |
1960 |
Dam Length |
225 |
Dam Height |
15 |
River Or Stream |
TR-SPRING COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
62 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yellowstone River At Forsyth Mt
|
5430cfs |
Nelson Creek Near Van Norman Mt
|
33cfs |
Yellowstone River At Miles City Mt
|
8100cfs |
Tongue River At Miles City Mt
|
263cfs |
Musselshell River At Mosby Mt
|
12cfs |
Flatwillow Creek Near Mosby Mt
|
17cfs |
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.
Aybee