Peterson Reservoir (Rosebud) Reservoir Report
Nearby: Langohr #1 Montana #9
Last Updated: December 6, 2025
Peterson Reservoir (Rosebud) is a privately owned water resource in Rosebud, Montana, completed in 1937 for purposes of fire protection, stock, and as a small fish pond.
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Summary
The reservoir has a dam height of 25 feet and a storage capacity of 105 acre-feet, with a normal storage level of 62 acre-feet. Situated on Butte Creek, the reservoir serves as a significant water source for the area, with a maximum discharge capacity of 8,168 cubic feet per second.
Managed by the Montana Department of Natural Resources and Conservation, Peterson Reservoir plays a crucial role in providing water for fire protection and supporting local wildlife. With its earth dam structure and a length of 375 feet, the reservoir has been designated as having a significant hazard potential, although its condition has not been formally rated. While the reservoir has not been inspected recently, it is regulated, permitted, and monitored by the state to ensure its safety and functionality.
For water resource and climate enthusiasts, Peterson Reservoir offers a glimpse into the intersection of human infrastructure and natural ecosystems in Montana. With its historical significance and practical purposes, the reservoir serves as a vital component of the region's water management system, showcasing the importance of sustainable water resource practices in the face of changing climate conditions.
Year Completed |
1937 |
Dam Length |
375 |
Dam Height |
25 |
River Or Stream |
BUTTE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
105 |
Hazard Potential |
Significant |
Nid Height |
25 |
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.
Peterson Reservoir (Rosebud)