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United States
Rosebud (Colstrip) Mine

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

  Regional Office:
138 Rosebud Lane
P.O. Box 99
Colstrip
Montana, United States
59323
Phone  ...  Subscription required
Fax406-748-5181
WebsiteWeb
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Coal (thermal)
Mining Method
  • Dragline
Mine Life19 years (as of Jan 1, 2019)
Westmoreland Coal Company became a privately held company on March 15, 2019. The company has not publicly reported 2018-2020 Rosebud Mine production data.


Owners

Source: p. 1
CompanyInterestOwnership
Westmoreland Mining LLC (WML) 100 % Indirect
Westmoreland Rosebud Mining LLC. (operator) 100 % Direct

Deposit Type

  • Sedimentary


Summary:


Mining Methods

  • Dragline


Summary:

The mine is located near Colstrip, Montana. Overburden is removed exposing the Rosebud coal seam utilizing four draglines and is deposited in previously mined pit areas. The coal is loaded by front-end loaders into 100 ton and 200 ton haul trucks for transport to areas where the 2 coal is stockpiled. The coal seam averages 20 to 25 feet in thickness and overburden thicknesses vary from 20 feet to more than 200 feet.

Rosebud is a large operation with three active pits and supplies almost all of its current production to the four-unit 2,100 megawatt Colstrip Power Station that is adjacent to the mine and was specifically designed to burn Rosebud coal.

Number of Draglines Removing Overburden - 4.

The Rosebud Mine Area F expansion project is located 12 miles west of Colstrip, Montana, in Rosebud and Treasure counties. The Area F project would expand the Rosebud Mine, which currently is a 25,576-acre surface coal mine producing low-sulfur subbituminous coal.

The coal mining method proposed would be the same area strip mining method that currently uses in other permitted areas of the Rosebud Mine. In advance of each mining pass, soil would be removed from the area and stockpiled according to type for use later during reclamation. Next, the overburden (sedimentary rock material covering the coal seams) would be drilled and blasted. Overburden from the initial cut would be stockpiled as spoil. A dragline would then be used to strip the overburden from succeeding mine passes. Spoil would be cast into the mined-out pit created by the preceding pass. After the dragline exposes the coal seam in each pass, the coal would be drilled and blasted. A loading shovel, front-end loader, or backhoe would be used to load blasted coal into coal haulers.

The coal would be transported on an established haul road to permit Area C for crushing. From there, most of the coal would be sent via the existing 4.2-mile conveyor to the Colstrip Steam Electric Station.


Crushing and Grinding


Processing


Summary:

Western Energy has shipped coal from the Rosebud Mine by rail, all coal currently produced by the mine is consumed locally at the Colstrip Power Plant and the Rosebud Power Plant.


Production:

CommodityUnits2020201920182017201620152014
Coal (thermal) k tons  ......  Subscription required  ......  Subscription required8,3938,6368,7989,4148,754
Heat ContentBTU/lb8,5508,5008,4178,4148,455
Sulfur%0.640.640.690.680.660.69
All production numbers are expressed as ROM coal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2017201620152014
Annual mining capacity 13,300 k tons of ROM coal13,300 k tons of ROM coal13,300 k tons of ROM coal13,300 k tons of ROM coal

Reserves at December 31, 2017:

CategoryTonnage Commodity
Proven 241,087 k tons Coal (thermal)
Proven & Probable 241,087 k tons Coal (thermal)


Heavy Mobile Equipment as of December 31, 2020:
HME TypeSizeQuantity
Dragline ....................... Subscription required
Excavator 20 cu. yd ....................... Subscription required
Loader 30 cu. yd ....................... Subscription required
Truck (haul) ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Nov 20, 2021
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Nov 20, 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

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Other 2018
Form 10-K 2017
Other 2017
Form 10-K 2016
Form 10-K 2016
Form 10-K 2015
Form 10-K 2014
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Aerial view:

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