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United States
Absaloka Mine

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 Location:
110 km E from Billings, Montana, United States

  Address:
698 Upper Sarpy Creek Road
P.O. Box 449
Hardin
Montana, United States
59034
Phone  ...  Subscription required
Fax406-342-5401
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • 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 Life2022
Westmoreland Coal Company became a privately held company on March 15, 2019. As such, public records for Absoloka Mine production data for 2018-2020 are not available.


Owners

Source: p. 1
CompanyInterestOwnership
Westmoreland Mining LLC (WML) 100 % Indirect
Westmoreland Absaloka Mining LLC (operator) 100 % Direct
The mine is operated by Westmoreland Absaloka Mining LLC, a subsidiary of Westmoreland Mining LLC.

Contractors

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Deposit Type

  • Sedimentary


Summary:

The proposed development area is located in the Powder River Basin (PRB), a part of the Northern Great Plains that includes most of northeastern Wyoming and a smaller portion of southeastern Montana. The Absaloka Mine and the South Extension are located near the northwestern edge of the PRB, in an area consisting primarily of dissected rolling hills, plateaus, and ridges of moderate to low relief that formed in the near-flat lying sedimentary strata. Resistant sandstone and clinker beds cap most of the upland areas and form steep cliff escarpments and isolated knobs. Elevations range from about 3,500 to 3,790 feet above sea level, slopes range from nearly flat on the valley bottoms and ridge tops to around 40 and 50 percent on the flanks of the surrounding ridges and hilltops, and approximately 61 percent of the surface has a slope of 10 percent or less.

The three lowermost coal seams of the Tongue River Member of the Fort Union Formation are the Rosebud, McKay, and the Robinson. In the Absaloka Mine area, all younger, stratigraphically higher coal seams have been removed by erosion. In parts of the current mine area, the Rosebud and McKay seams are joined into a single seam referred to as the Rosebud-McKay, which averages 32 feet in thickness. Mining within the proposed development area would be limited to the Rosebud and McKay coal seams. Where not affected by erosion or oxidation, the Rosebud and McKay seams are relatively consistent in thickness throughout the ........


Mining Methods

  • Truck & Shovel / Loader
  • Dragline


Summary:

The Absaloka Mine is a 10,427 acre permitted, single-pit surface mine complex located near Hardin, Montana and the Crow Indian Reservation. The coal reserves are leased from the Crow Tribe of Indians. The Absaloka Mine was expressly developed to supply Powder River Basin coal to a group of Midwestern utilities, including Xcel Energy’s Sherburne County Station near Minneapolis, Minnesota. Over the years, it has also sold coal to several other upper Midwest utilities. Coal is shipped via a 38-mile rail spur to the main line of the Burlington Northern Santa Fe Railroad near Hysham, Montana.

The Absaloka Mine has the present capacity to produce up to 7.5 million tons of coal annually.

The first step of the mining process is soil salvage using rubber-tired scrapers. Soil is salvaged in two lifts: the first lift being the “A” horizon topsoil, and the second lift being the “B” horizon subsoil. During initial box cut development, soil is placed in temporary stockpiles for later use in final pit closure and reclamation. Once the pit has advanced far enough to establish room for regrading of dragline spoils, soil is hauled directly from salvage areas and redistributed on regraded areas.

After soil salvage operations are complete, blast holes are drilled down through the overburden to the top of the Rosebud coal seam. The drill holes are then loaded with explosives (ANFO) and detonated to fragment the overburden to facilitate dragline excavation.
........


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits2021202020192018201720162015
Coal (thermal) k tons  ......  Subscription required  ......  Subscription required  ......  Subscription required3,8283,5744,1585,882
Heat ContentBTU/lb8,5718,5718,5808,5168,535
Sulfur%0.660.660.610.620.64
All production numbers are expressed as ROM coal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Coal tonnes mined  ......  Subscription required  ......  Subscription required3,129 k tons of ROM coal3,828 k tons of ROM coal3,574 k tons of ROM coal4,158 k tons of ROM coal
Annual mining capacity  ......  Subscription required  ......  Subscription required7,500 k tons of ROM coal7,500 k tons of ROM coal7,500 k tons of ROM coal7,500 k tons of ROM coal
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Reserves at December 31, 2017:

CategoryTonnage Commodity
Proven 27,565 k tons Coal (thermal)


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment as of December 31, 2019:
HME TypeModelSizeQuantity
Belly-dump truck ....................... Subscription required 150 t
Dragline ....................... Subscription required 115 cu. yd ....................... Subscription required
Loader ....................... Subscription required
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Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 25, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Aug 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 25, 2022
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Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Other 2018
Form 10-K 2017
Other 2017
Form 10-K 2016
Form 10-K 2015
Form 10-K 2014
Environmental Impact Statement 2008
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