Big Timber #49 Reservoir Report
Nearby: Big Timber #47 Big Timber #44
Last Updated: December 8, 2025
Big Timber #49 is a state-owned earth dam located in Rosebud, Montana, specifically in the city of VANANDA.
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Summary
Built in 1956 by the USDA NRCS, this dam serves multiple purposes, including fire protection, stock, and as a small fish pond. With a height of 23 feet and a storage capacity of 60 acre-feet, the dam spans 225 feet in length and is situated on TR-HORSE CREEK, within the jurisdiction of the Montana Department of Natural Resources and Conservation (DNRC).
Despite being classified as having a low hazard potential, Big Timber #49 poses a moderate risk according to the data provided. The dam has not been rated for its condition assessment, and there is limited information available on its emergency action plan and risk management measures. However, with state regulation, permitting, inspection, and enforcement in place, the dam meets guidelines for state jurisdiction and is in compliance with necessary safety protocols.
For water resource and climate enthusiasts, Big Timber #49 presents an intriguing case study of a state-owned dam that plays a crucial role in fire protection and water storage in the region. With its location in a rural area and its reliance on uncontrolled spillways, this dam serves as a reminder of the importance of infrastructure maintenance and risk assessment in ensuring the safety and sustainability of water resources for both human and environmental needs.
Year Completed |
1956 |
Dam Length |
225 |
Dam Height |
23 |
River Or Stream |
TR-HORSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
23 |
Drainage Area |
1.09 |
Nid Storage |
60 |
Hazard Potential |
Low |
Nid Height |
23 |
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 #49