Big Timber #47 Reservoir Report
Nearby: Big Timber #49 Big Timber #44
Last Updated: December 8, 2025
Big Timber #47 is a private Earth dam located in Rosebud, Montana, specifically in the city of VANANDA, along Horse Creek.
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Summary
Completed in 1955, this dam serves multiple purposes including fire protection, stock, and a small fish pond, with a storage capacity of 214 acre-feet. The dam has a significant hazard potential and a height of 18 feet, providing essential water resource management in the area.
Owned by a private entity, Big Timber #47 is regulated and permitted by the Montana Department of Natural Resources and Conservation (DNRC), with regular inspections and enforcement measures in place. The dam is situated in Congressional District 00, Montana, represented by Greg Gianforte (R), and falls under the jurisdiction of the state. Despite its age, the condition of the dam has not been rated, highlighting the need for ongoing monitoring and risk assessment to ensure its continued functionality and safety for the surrounding community.
As a crucial infrastructure for water resource management, Big Timber #47 plays a vital role in providing water for fire protection, livestock, and recreational purposes. With its location in a picturesque setting in Montana, this dam serves as a reminder of the importance of sustainable water management practices and the need for continued investment in maintaining and updating our water infrastructure to adapt to changing climate conditions.
Year Completed |
1955 |
Dam Length |
375 |
Dam Height |
18 |
River Or Stream |
HORSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
214 |
Hazard Potential |
Significant |
Nid Height |
18 |
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 #47