Summary
This dam serves the primary purpose of storing tailings from mining operations, with a storage capacity of 580 acre-feet and a surface area of 285 acres. Despite its high hazard potential, the dam's condition assessment as of June 2018 was deemed satisfactory.
The dam has not undergone any modifications in recent years, with the last inspection conducted in January 2021. The emergency action plan for the dam was last revised in October 2015, and there are no inundation maps or risk assessments available for the structure. With a history of regulatory compliance and satisfactory condition, the Golden Sunlight #2 Tailings Dam remains a key component in managing water resources and environmental impacts in the area.
As water resource and climate enthusiasts monitor the Golden Sunlight #2 Tailings Dam, its role in storing mining waste and potential risks associated with its high hazard potential are important considerations. With ongoing regulatory oversight and routine inspections, the dam continues to operate safely and effectively in Jefferson, Montana, contributing to the responsible management of water resources in the region.
Surface Area |
285 |
Nid Storage |
580 |
Hazard Potential |
High |
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.
Golden Sunlight #2 Tailings Dam
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