Bob #6 Reservoir Report
Nearby: Section Four Smith Ranch 4
Last Updated: December 6, 2025
Bob #6 is a private water structure located in Cohagen, Montana, along TR-Lone Tree Creek.
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Summary
Built in 1954, this earth dam stands at a height of 20 feet and has a storage capacity of 124 acre-feet, primarily serving the purposes of fire protection, stock, and small fish pond maintenance. Despite being in a low hazard potential area and not currently rated for condition assessment, Bob #6 is regulated and inspected by the Montana Department of Natural Resources and Conservation (DNRC).
This water resource plays a crucial role in supporting local fire prevention efforts and agricultural activities in Garfield County, Montana. With a normal storage capacity of 63 acre-feet and a maximum storage of 124 acre-feet, Bob #6 contributes to maintaining water levels in the area, ensuring a stable water supply for livestock and wildlife. While the dam has not undergone recent inspections or been assessed for condition, its presence underscores the importance of effective water management in this region.
Situated in a remote location with limited risk potential, Bob #6 remains a vital component of the water infrastructure in Cohagen, Montana. The dam's historical significance and multi-purpose functionality make it a valuable asset for the local community, providing essential water resources for firefighting, agricultural activities, and ecological conservation. As efforts to assess and maintain the condition of Bob #6 continue, its role in sustaining water resources and climate resilience in the area remains paramount.
Year Completed |
1954 |
Dam Length |
160 |
Dam Height |
20 |
River Or Stream |
TR-LONE TREE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
124 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Bob #6