Big Reservoir Reservoir Report
Nearby: Cherry Creek Adams #5
Last Updated: December 6, 2025
Big Reservoir, located in Rosebud, Montana, is a private water resource managed by the USDA NRCS.
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Summary
This Earth dam, completed in 1950, serves multiple purposes including fire protection, stock watering, and small fish pond support. With a height of 16 feet and a storage capacity of 56 acre-feet, it plays a crucial role in meeting the water needs of the local community.
Despite its low hazard potential and moderate risk assessment, Big Reservoir is not currently rated for its condition. However, it is regularly inspected and maintained by the DNRC to ensure its structural integrity and continued functionality. The reservoir's location on TR-CHERRY CREEK makes it a vital resource for water management in the area, especially during periods of drought or increased water demand.
Enthusiasts of water resources and climate will appreciate the importance of Big Reservoir in supporting both human and wildlife needs in the region. Its design and purpose reflect a commitment to sustainable water management practices, ensuring that the reservoir remains a reliable source of water for the community well into the future.
Year Completed |
1950 |
Dam Length |
165 |
Dam Height |
16 |
River Or Stream |
TR-CHERRY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Drainage Area |
1.72 |
Nid Storage |
56 |
Hazard Potential |
Low |
Nid Height |
16 |
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 Reservoir