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United States
Freedom Mine

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

  Address:
204 County Road 15
Beulah
North Dakota, United States
58523
Phone  ...  Subscription required
Fax(701)-873-7226
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Coal (thermal)
Mining Method
  • Dragline
The largest lignite mine in the United States.


Owners

Source: p. 5, 13, 109
CompanyInterestOwnership
NACCO Industries Inc. 100 % Indirect
Coteau Properties Company (operator) 100 % Direct
The Freedom Mine is owned and operated by the Coteau Properties Company. The coal reserves at Coteau Properties Company are owned or controlled by the NACCO Industries Inc.

Deposit Type

  • Unconformity related
  • Sedimentary


Summary:

The reserves are located in Mercer County, North Dakota, starting approximately two miles north of Beulah, North Dakota. The center of the basin is located near the city of Williston, North Dakota, approximately 100 miles northwest of the Freedom Mine. The economically mineable coal in the reserve occurs in the Sentinel Butte Formation, and is overlain by the Coleharbor Formation. The Coleharbor Formation unconformably overlies the Sentinel Butte Formation. It includes all of the unconsolidated sediments resulting from deposition during glacial and interglacial periods. Lithologic types include gravel, sand, silt, clay and till. The modified glacial channels are in-filled with gravels, sands, silts and clays overlain by till. The coarser gravel and sand beds are generally limited to near the bottom of the channel fill. The general stratigraphic sequence in the upland portions of the reserve area consists of till, silty sands and clayey silts.

Type of Mine: Surface Lignite
Coal Seam: Beulah-Zap Seam
Average Seam Thickness: 16 feet
Average Depth: 100 feet

Average Coal Quality (As received):
Heat Content - 6,700 BTUs/lb
Sulfur - 0.90%
Ash - 9%
Moisture - 36%


Mining Methods

  • Dragline


Summary:

The Freedom mine - dragline operation with 3 dragline.

At Coteau, overburden is mainly removed by draglines, which have bucket capacities of up to 124 cubic yards. Other machinery, such as loading shovels, excavators and large trucks also help with overburden removal.

After coal is exposed, it is either ripped or blasted to prepare for loading into coal hauling trucks. Once coal is loaded into haul trucks, it is taken to the truck dump and crushers. From there, coal is delivered to the customers by trucks and conveyors or rail.

Once coal has been removed from an area, the spoil piles are graded to the approximate original contour of the land prior to mining. Once the regraded spoil contours are approved by the North Dakota Public Service Commission, suitable plant growth material (SPGM) is respread over the area. When the SPGM and topsoil is in place, grasses or crops are seeded using standard farming techniques and equipment. This reclamation process occurs contemporaneously with the advancing mining process.


Crushing and Grinding


Processing



Production:

CommodityUnits2020201920182017201620152014
Coal (thermal) tons  ......  Subscription required  ......  Subscription required14,183,31314,716,77714,109,96014,294,69014,432,335
Heat ContentBTU/lb6,7006,7006,7006,7006,7006,7006,700
Sulfur%0.90.90.90.90.90.90.9
All production numbers are expressed as ROM coal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018201720162015
Coal tonnes mined  ......  Subscription required13.5 M tons14.2 M tons14.7 M tons14.1 M tons14.3 M tons
Subscription required - Subscription is required.

Reserves at December 31, 2020:

CategoryTonnage Commodity
Proven & Probable 438 M tons Coal (thermal)


Heavy Mobile Equipment as of December 1, 2020:
HME TypeModelSizeQuantity
Dragline ....................... Subscription required 120 cu. yd ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 22, 2021
....................... Subscription required ....................... Subscription required Subscription required Apr 22, 2021
Subscription required - Subscription is required.

Staff:

EmployeesYear
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 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Form 10-K 2018
Other 2018
Form 10-K 2017
Other 2017
Environmental Assessment 2016
Form 10-K 2016
Other 2016
Form 10-K 2015
Subscription required - Subscription is required.

Aerial view:

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