Minntac Tailings Dam

Minntac Tailings Dam Quick Facts

Location: St. Louis, Minnesota
Coordinates: 47.5986, -92.62857
River: Closed System-Os River
Primary Purpose: Tailings
Type: Earth
Commissioned: 1978
Dam Height: 50 ft (15 m)
Dam Length: 63,360 ft (19,312 m)
Dam Capacity: 143,000 acre-ft (176,388 Ml)
Condition Assessment: Satisfactory
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Minntac Tailings Dam Map

Minntac Tailings Dam Information

Minntac Tailings Dam is an earthen embankment dam located about 2 miles from Local Residents, St. Louis, Minnesota.

The dam, which is on the Closed System-Os River, was primarily built for Tailings purposes, but also serves for benefits.

The dam was designed by and commissioned in 1978 and is currently owned by US Steel.

Minntac Tailings Dam Structure

The Minntac Tailings Dam is approximately 63,360 feet (19,312 m) long, 50 feet (15 m) high and has a structural volume of cubic yards (0 cubic metres).

Minntac Tailings Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 114,000 acre-ft (140,617 Ml) and maximum capacity of 143,000 acre-ft (176,388 Ml).

The surface area of the reservoir is acres (0 ha) and the total catchment area is 13 square miles (34 square kilometres).

Minntac Tailings Dam Spillway

According to the latest available data, the Minntac Tailings Dam does not have any spillways.

Minntac Tailings Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Minntac Tailings Dam
St. Louis, Minnesota
Height (ft)
50
Length (Ft)
63,360
Storage Volume (acre-ft)
143,000
Drainage Area (sq miles)
13
Hoover Dam
Clark County, Nevada
Height (ft)
730
Length (Ft)
1,244
Storage Volume (acre-ft)
30,237,000
Drainage Area (sq miles)
167,800
Grand Coulee Dam
Okanogan County, Washington
Height (ft)
550
Length (Ft)
5,673
Storage Volume (acre-ft)
9,562,0000
Drainage Area (sq miles)
74,100
Theodore Roosevelt Dam
Maricopa County, Arizona
Height (ft)
357
Length (Ft)
1,208
Storage Volume (acre-ft)
3,411,500
Drainage Area (sq miles)
5,736
Oroville Dam
Butte County, California
Height (ft)
235
Length (Ft)
6,920
Storage Volume (acre-ft)
3,540,000
Drainage Area (sq miles)
3,611
Glen Canyon Dam
Coconino County, Arizona
Height (ft)
216
Length (Ft)
1,565
Storage Volume (acre-ft)
29,875,000
Drainage Area (sq miles)
108,355

Minntac Tailings Dam Weather

Current Conditions at Minntac Tailings Dam

Parameter Value
Current Time 20:11
Sunrise 07:48
Sunset 16:54
Temperature (°F) -3
Feels Like (°F) -15
Cloud Coverage (%) 100
Pressure (inHg) 1016
Humidity (%) 90
Wind Speed (mph) 14
Rain (mm) 0

7-Day Forecast for Minntac Tailings Dam

Day Min Temp (°F) Max Temp (°F) Feels Like (°F) Pressure (inHg) Humidity (%) Wind Speed (mph) Wind Gust (mph) Wind Dir Precip Prob (%) Precip Volume (mm) Weather
Today -24 -0 -20 1026 71 14 38 S 100 - light snow
Wed 1 14 -0 1014 80 12 30 S 100 - light snow
Thu -10 7 -10 1030 73 9 22 NNW 0 - scattered clouds
Fri -10 14 -0 1015 80 11 34 SSW 100 - light snow
Sat 1 17 -3 1020 84 13 32 WNW 90 - light snow
Sun -3 19 2 1019 74 13 33 WSW 98 - light snow
Mon 13 25 10 1005 92 13 35 W 100 - light snow
Tue -14 22 -1 1015 76 15 40 SSW 100 - snow

Minntac Tailings Dam Frequently Asked Questions

In which state is the Minntac Tailings Dam?

Minntac Tailings Dam is in Minnesota.

In which county is the Minntac Tailings Dam?

Minntac Tailings Dam is in St. Louis County.

How high is the Minntac Tailings Dam?

Minntac Tailings Dam is 50 feet high.

How long is the Minntac Tailings Dam?

Minntac Tailings Dam is 63,360 feet long.

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More Dams in St. Louis County:

Boulder Lake Dam
Ely Lake Dam
Erie Basin 1 Dam
Erie Basin 2 Dam
Esquagama Lake Dam
Fish Lake Dam
Floodwood Lake Dam
Hibbing Taconite Starter No. 1 Dam
Hibbing Taconite Starter No. 2 Dam
Hibbing Taconite Starter No. 3 Dam
Hibbing Taconite Starter No. 4 Dam
Inland Steel Tailings Dam
Island Lake Dam
Minntac Tailings Dam
Minorca Pit South Dam
Nspc Stage 2 Tailings Dam
Pelican Lake Dam
Sturgeon Lake Dam
West Two Rivers Dam
Western Hibtac Dam
Whiteface Lake Dam
Whitewater Reservoir Dam
Whitewater Reservoir Saddle Dam
Wild Rice Lake Dam
Wynne Lake Dam

Condition Assessment Classification

Satisfactory

No 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

High

Dams 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.

Source: National Inventory of Dams

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