B G Olson #1 Reservoir Report
Nearby: B G Olson #2 J Galt #10
Last Updated: December 8, 2025
B G Olson #1 is a private water resource located in Forsyth, Montana, with a primary purpose of fire protection, stock, or small fish pond.
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Summary
Constructed in 1976, this earth dam stands at a height of 22 feet and has a storage capacity of 54 acre-feet. Situated on the TR-West Blacktail Creek, this structure serves as a vital component for water management in the area.
Managed by the DNRC and regulated by the state of Montana, B G Olson #1 has a low hazard potential and is currently in a condition assessment of "Not Rated". Although not inspected recently, the presence of emergency action plans and risk management measures ensures the safety and security of the surrounding community. With a capacity for both irrigation and fire protection, this dam plays a crucial role in managing water resources in Rosebud County.
Overall, B G Olson #1 is a key infrastructure for water management in the region, providing valuable storage for fire protection, stock, and small fish pond purposes. With its low hazard potential and state jurisdiction, this earth dam stands as a testament to effective water resource management in Montana. Its construction in 1976 and continued operation highlight the importance of maintaining and monitoring such structures for the benefit of both the environment and the community.
Year Completed |
1976 |
Dam Length |
225 |
Dam Height |
22 |
River Or Stream |
TR-WEST BLACKTAIL CR |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
54 |
Hazard Potential |
Low |
Nid Height |
22 |
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.
B G Olson #1