Goffena #4 Reservoir Report
Nearby: Goffena #2 Gofara #6
Last Updated: February 24, 2026
Goffena #4 is a privately owned earth dam located in Petroleum County, Montana, near the city of Mosby.
Summary
Completed in 1948, this dam serves multiple purposes including fire protection, stock watering, and as a small fish pond. It has a height of 20 feet and a length of 300 feet, with a storage capacity of 512 acre-feet and a normal storage of 176 acre-feet.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Goffena #4 is regulated and inspected by the state to ensure its safety and compliance with regulations. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. Despite lacking specific data on its inspection frequency and emergency preparedness, Goffena #4 remains a crucial infrastructure for local water resource management and climate resilience in the region.
Located on Mud Creek, a tributary of the Yellowstone River, Goffena #4 provides essential water storage for fire protection and agricultural activities in the area. While it may not have a high risk profile, the dam plays a vital role in supporting the local community and ecosystems, highlighting the importance of proper maintenance and oversight to ensure its long-term functionality and safety for the future.
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15-Day Weather Outlook
Year Completed |
1948 |
Dam Length |
300 |
Dam Height |
20 |
River Or Stream |
TR-MUD CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
512 |
Hazard Potential |
Low |
Nid Height |
20 |
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 #4