Big Timber #10 Reservoir Report
Nearby: Black Sea Reservoir Big Timber #14
Last Updated: December 6, 2025
Big Timber #10 is a privately owned earth dam located in Forsyth, Montana, specifically on West Blacktail Creek.
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Summary
Completed in 1975, this dam serves multiple purposes including fire protection, stock, and a small fish pond. With a height of 26 feet and a length of 1000 feet, Big Timber #10 has a storage capacity of 55 acre-feet, with normal storage levels at 38 acre-feet.
Managed by the Montana Department of Natural Resources and Conservation, Big Timber #10 is classified as having a low hazard potential and has not been rated for its current condition. Despite lacking certain inspection and emergency preparedness details, the dam is equipped with state-regulated features such as permitting, inspection, and enforcement protocols. Situated within Congressional District 00, Montana, the dam stands as a vital resource for water management and climate resilience in the region.
Overall, Big Timber #10 represents a critical infrastructure for water resource management in Rosebud County, Montana. With its strategic location on West Blacktail Creek and the multiple purposes it serves, this dam plays a crucial role in providing irrigation, stock water, and fire protection for the surrounding area. As climate change continues to impact water availability and quality, structures like Big Timber #10 will be essential in safeguarding water resources and adapting to the changing environmental conditions.
Year Completed |
1975 |
Dam Length |
1000 |
Dam Height |
26 |
River Or Stream |
WEST BLACKTAIL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
55 |
Hazard Potential |
Low |
Nid Height |
26 |
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 #10