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United States
Center Mine

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 Location:
50 km NW from Bismarck, North Dakota, United States

  Regional Office:
1637 Burnt Boat Drive P.O. Box 897
Bismarck
North Dakota, United States
58502-0897
Phone  ...  Subscription required
Fax(701) 222-1547
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  • Overview
  • Owners
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
  • Dragline
Production Start...
Mine Life2037


Owners

Source:
CompanyInterestOwnership
BNI Coal Ltd. (operator) 100 % Direct
ALLETE, Inc. 100 % Indirect
BNI Energy, Inc., a wholly owned subsidiary of ALLETE, Inc. (NYSE-ALE), owns and operates BNI Coal, Center mine.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Sedimentary


Summary:


Mining Methods

  • Truck & Shovel / Loader
  • Dragline


Summary:

Mining began at the Center Mine in 1970.

In areas of thick overburden, a hydraulic excavator and a fleet of end dump trucks are used to remove part of the overburden prior to dragline operations. The excavator and truck overburden removal step was introduced into BNI’s mining process in 2012.

The primary overburden removal tool at the Center Mine is the dragline. These machines can remove overburden up to 120’ thick and place it in piles 140’ high. The buckets of these draglines are larger than a typical school bus. They are powered with electricity produced from the same lignite they uncover.

Since 1970, lower stripping ratios have facilitated the economic recovery of coal at the mine. However, the ratios have steadily increased and currently in areas exceed 10:1.


Crushing and Grinding


Processing


Summary:

After the lignite has been uncovered with the dragline, it must be broken into smaller pieces before it can be hauled to the power plant. This operation is done with bulldozers. The bulldozers at BNI are equipped with a large ripper shank built specifically for breaking coal into pieces small enough to be placed into BNI’s haul trucks.


Production:

CommodityUnits2021202020192018201720162015
Coal (thermal) tons  ......  Subscription required  ......  Subscription required  ......  Subscription required4,256,8674,288,4044,296,3074,393,986
All production numbers are expressed as ROM coal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019
Raw coal annual capacity  ......  Subscription required  ......  Subscription required4 M tons
Subscription required - Subscription is required.

Reserves at December 31, 2021:

CategoryTonnage Commodity
Proven & Probable 650 M tons Coal (thermal)

Financials:

Units202120202019201820172016
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 6.8   4.5   6.8  
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2019:
HME TypeModelQuantityLeased or
Contractor
Dragline ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 6, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Oct 6, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Oct 7, 2020
....................... Subscription required ....................... Subscription required ....................... Subscription required Oct 7, 2020
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015
Subscription required 2014
Subscription required 2013
Subscription required 2012
Subscription required 2011

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Other 2018
Form 10-K 2017
Other 2017
Other 2016
Form 10-K 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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