Big Timber #41 Reservoir Report
Nearby: Ja Montgomery #1 Ballard #1
Last Updated: December 8, 2025
Big Timber #41 is a privately owned earth dam located in Forsyth, Montana, along the TR-Horse Creek.
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Summary
Built in 1946, this dam serves multiple purposes including fire protection, stock water supply, and small fish pond maintenance. With a dam height of 20 feet and a storage capacity of 91 acre-feet, it provides essential resources for the local community while also contributing to the ecological health of the area.
Managed by the DNRC and regulated by the state of Montana, Big Timber #41 has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. While specific details about the dam's inspection frequency and maintenance history are not provided, the structure is considered to meet state guidelines for emergency action plans. Despite its age, the dam continues to serve its intended purpose effectively and efficiently.
Located in Rosebud County, Montana, Big Timber #41 is a vital piece of infrastructure that plays a crucial role in water resource management and climate resilience in the region. With its strategic location and multiple uses, this dam exemplifies the importance of sustainable water management practices and the need for continued monitoring and maintenance to ensure its long-term functionality and safety.
Year Completed |
1946 |
Dam Length |
350 |
Dam Height |
20 |
River Or Stream |
TR-HORSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
91 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Big Timber #41