Bass (Rosebud) Reservoir Report
Nearby: Schlesinger #1 Schlesinger #6
Last Updated: December 6, 2025
Located in Rosebud, Montana, Bass (Rosebud) is a privately owned dam designed by the USDA NRCS and regulated by the DNRC.
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Summary
Completed in 1963, this earth dam stands at a height of 30 feet and serves multiple purposes including fire protection, stock, and small fish pond management. With a storage capacity of 299 acre-feet and a drainage area of 2.34 square miles, Bass (Rosebud) plays a crucial role in water resource management in the region.
While the dam has a low hazard potential and a moderate risk assessment score, its condition assessment has not been rated. The spillway type is uncontrolled, and the dam is inspected, permitted, and enforced by the state regulatory agency with regular inspections. The structure, located on TR-Hanson Coulee, serves as a vital resource for the community of Forsyth and surrounding areas for both water storage and fire protection.
Overall, Bass (Rosebud) is a key component of the water infrastructure in Montana, providing essential services for irrigation, livestock, and emergency preparedness. With its strategic location and multiple purposes, this dam underscores the importance of effective water resource management and climate resilience in the face of changing environmental conditions.
Year Completed |
1963 |
Dam Length |
125 |
Dam Height |
30 |
River Or Stream |
TR-HANSON COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Drainage Area |
2.34 |
Nid Storage |
299 |
Hazard Potential |
Low |
Nid Height |
30 |
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.
Bass (Rosebud)