Goffena #2 Reservoir Report
Nearby: Goffena #4 Bethel #7
Last Updated: February 24, 2026
Goffena #2 is a privately owned earth dam located in Petroleum County, Montana, specifically in the city of Mosby.
Summary
Completed in 1953, this dam serves multiple purposes including fire protection, stock watering, and as a small fish pond. With a height of 21 feet and a storage capacity of 155 acre-feet, Goffena #2 plays a crucial role in water resource management in the region.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Goffena #2 is regulated, inspected, and enforced by the state to ensure its structural integrity and safety. Despite being classified as having a low hazard potential, the dam's condition assessment is currently not rated, indicating the need for further evaluation and monitoring. With its proximity to the TR-Mud Creek, this dam provides vital water resources for the surrounding area and contributes to the overall environmental and ecological balance.
As a key structure in the local water infrastructure, Goffena #2 represents a significant component of the region's water resource management system. With its historical significance and continued importance for fire protection, agriculture, and wildlife habitat, this dam serves as a symbol of sustainable water utilization and conservation efforts in Montana. Climate and water resource enthusiasts can appreciate the role that Goffena #2 plays in supporting the diverse needs of the community while also highlighting the importance of effective dam regulation and maintenance practices.
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15-Day Weather Outlook
Year Completed |
1953 |
Dam Length |
175 |
Dam Height |
21 |
River Or Stream |
TR-MUD CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
155 |
Hazard Potential |
Low |
Nid Height |
21 |
Seasonal Comparison
5-Day Hourly Forecast Detail
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.
Goffena #2