Nspc Initial Tailings Reservoir Report
Last Updated: December 14, 2025
Nspc Initial Tailings, also known as Keetac, is a private-owned tailings structure located in Pengilly, Minnesota.
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Summary
Regulated by the Minnesota Department of Natural Resources, this earth dam stands at a height of 45 feet and was completed in 1968. With a capacity of 1,050 acre-feet, its primary purpose is for tailings storage in the area. The dam is situated on the Swan River-OS, in St. Louis County, and has a low hazard potential with a satisfactory condition assessment as of the last inspection in 2013.
Covering an area of 24,100 feet in length, Nspc Initial Tailings serves as an essential structure in the region for managing water resources and climate impacts. The dam has a normal storage capacity of 160 acre-feet and a drainage area of 3.9 square miles. Despite its low hazard potential, the dam undergoes regular inspections and is subject to state permitting, inspection, and enforcement to ensure its safety and integrity for the surrounding community and environment.
With its strategic location in Minnesota and efficient design, Nspc Initial Tailings plays a crucial role in water management and climate resilience efforts in the area. As a vital earth dam structure, it highlights the importance of responsible tailings storage and regulation to mitigate potential risks and safeguard water resources for future generations. Its satisfactory condition and low hazard potential underscore the commitment to maintaining high safety standards and environmental protection for the community and ecosystem.
Year Completed |
1968 |
Dam Length |
24100 |
Dam Height |
45 |
River Or Stream |
SWAN RIVER-OS |
Primary Dam Type |
Earth |
Drainage Area |
3.9 |
Nid Storage |
1050 |
Structural Height |
45 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
45 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Prairie River Near Taconite
|
63cfs |
Mississippi River At Grand Rapids
|
639cfs |
St. Louis River At Scanlon
|
693cfs |
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.
Nspc Initial Tailings
O'Brien Reservoir