Groh Stock Reservoir Report
Nearby: Wheatley Farms #2 Reinemer
Last Updated: December 6, 2025
Groh Stock is a private earth dam located in Circle, Montana, along the TR-Horse Creek.
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Summary
Built in 1938, the dam serves multiple purposes including fire protection, stock watering, and creating a small fish pond. With a height of 24 feet and a storage capacity of 60 acre-feet, Groh Stock is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected and enforced by state authorities.
Despite being classified as having a low hazard potential, Groh Stock's condition has not been rated, and it is not currently equipped with an Emergency Action Plan (EAP) or inundation maps. The dam has not undergone any modifications since its construction and does not have a designated risk assessment or management plan in place. The primary purpose of Groh Stock is to provide essential water resources for fire protection and livestock, highlighting its importance in sustaining local ecosystems and communities in the region.
As water resource and climate enthusiasts, it is crucial to monitor and assess the condition of dams like Groh Stock to ensure their safety and functionality. By staying informed about the regulatory oversight, maintenance, and potential risks associated with such structures, we can work towards safeguarding water resources and mitigating climate-related challenges in the future.
Year Completed |
1938 |
Dam Length |
30 |
Dam Height |
24 |
River Or Stream |
TR-HORSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
60 |
Hazard Potential |
Low |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Redwater River At Circle Mt
|
1cfs |
Nelson Creek Near Van Norman Mt
|
33cfs |
Missouri River Near Wolf Point Mt
|
5020cfs |
Yellowstone River At Glendive Mt
|
6000cfs |
Milk River At Nashua Mt
|
233cfs |
Poplar River Near Poplar Mt
|
28cfs |
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.
Groh Stock