Mesabi Chief Tailings 2

Mesabi Chief Tailings 2 is an earth dam located in Itasca County, Minnesota, built in 1952. It carries a Low hazard potential classification and has a satisfactory condition assessment.

About Mesabi Chief Tailings 2

The primary purpose of Mesabi Chief Tailings 2 is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Us Steel (private). It impounds the Swan River-tr near Keewatin.

The dam stands 40 feet tall and stretches 9,600 feet across, has a maximum storage capacity of 7,760 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1952, the structure is well into its service life at over 50 years old.

This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/17/2017.

At 40 feet, this dam is taller than 87% of dams nationwide.

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Low HazardSatisfactory ConditionEmergency Action Plan: Not Required

Location

StateMinnesota
CountyItasca
Nearest CityKeewatin
River/StreamSwan River-tr
Coordinates47.37166, -93.08265

Physical Characteristics

Dam TypeEarth
NID Height40 ft
Dam Height40 ft
Dam Length9,600 ft
Year Completed1952 (74 years old)

Storage & Hydraulics

NID Storage7,760 acre-ft
Max Storage7,760 acre-ft
Normal Storage3,880 acre-ft
Drainage Area0 sq mi

Ownership & Safety

PurposeTailings
OwnerUS Steel
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentSatisfactory
Last Inspection09/17/2017
Emergency Action PlanNot Required

Identifiers

NID IDMN00778
Federal IDMN00778
More InfoState Dam Safety Program

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