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United States
Spring Creek Mine

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 Location:
143 km SE from Billings, Montana, United States

  Address:
Lakeshore Drive
P.O. Box 67
Decker
Montana, United States
59025
Phone  ...  Subscription required
Fax(406-757-2405
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 Life2027


Owners

Source: p. 1
CompanyInterestOwnership
Navajo Transitional Energy Company, LLC (operator) 100 % Indirect
The Spring Creek mine is operated by the Navajo Transitional Energy Company, LLC.

Contractors

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Deposit Type

  • Sedimentary


Summary:

The mine extracts thermal coal from the Anderson-Dietz Seam, which averages approximately 80 feet in thickness.

Geology
Strata exposed at the Spring Creek Mine belong to the Tongue River Member of the Fort Union Formation of Paleocene age. The uppermost stratum consists of reddish, clinkered sediments overlying the burned 7 to 15 foot thick Smith coal seam which caps portions of the Central Bluffs and higher topographic areas of the site. The bluffs directly south of the South Fork Spring Creek either have outcrops of the Smith seam or show clinker resulting from Smith seam burn, depending on location. [02/05/2016 Spring Creek Coal conservation plan, p.1]

The 80-foot Anderson-Dietz (A/D) seam is the only presently economic coal seam at SCM. Within the Pits 1, 2 and 3 portions of the mine permit area the A/D seam lies approximately 140 feet below the Smith seam. Within Pit 4 the A/D seam lies approximately 220 feet below the Smith seam. Clinker zones are evident along the outcrop of the Smith seam within the Pit 4 area where natural burning of Smith coal has occurred. A bedrock clinker and partial burn zone for the A/D seam exists near the northeastern and eastern boundaries of the Pit 4 area. Rock units between the Smith and A/D coal seams consist principally of interbeds of gray to dark gray shale/claystone, gray to yellowish gray sandstone and siltstone, and carbonaceous shale. With the exception of the coal seams, the lithologic units are typical ........


Mining Methods

  • Truck & Shovel / Loader
  • Dragline


Summary:

The Spring Creek Mine is located in Montana approximately 20 miles north of Sheridan, Wyoming. The mine extracts thermal coal from the Anderson-Dietz Seam, which averages approximately 80 feet in thickness. The location of the mine relative to the Great Lakes is attractive to our customers in the northeast because of lower transportation costs.

Overburden is removed by a combination of dragline, cast blast, dozer, and truck/shovel methods. Coal is removed by truck and shovel type systems.

Coal Removal
Spring Creek Mine mines coal from a seam averaging 80 feet thick. The coal is blasted using ammonium nitrate and fuel oil explosives and methods similar to what is used for the overburden. The coal is then loaded with shovels and front-end loaders into mining haul trucks. The coal is transported to the primary crusher at the truck dump or to the in-pit crusher for overland conveying. Mining frequently occurs simultaneously at multiple locations across the mine to blend the coal and create a marketable product to meet various customer specifications.

Overburden Replacement
Overburden is placed as backfill in the mined-out pits with a dragline and by cast blasting from the adjacent pit area to be mined, according to ARM 17.24.501 and the General Backfilling and Grading Section of SCM’s approved permit. SCM has estimated up to 35 percent of the overburden volume in some areas can be moved by cast blasting. Overburden can also be tr ........


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2021202020192018201720162015
Coal (thermal) tons  ......  Subscription required  ......  Subscription required  ......  Subscription required13,768,05512,725,65610,245,08116,987,420
Heat ContentBTU/lb9,2489,2199,297
Sulfur%0.330.330.33
All production numbers are expressed as ROM coal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Coal tonnes mined  ......  Subscription required  ......  Subscription required11,928,834 tons of ROM coal13,768,055 tons of ROM coal12,725,656 tons of ROM coal10,245,081 tons of ROM coal
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Reserves at March 1, 2020:

CategoryTonnage Commodity
Proven & Probable 189.9 M tons Coal (thermal)


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment as of December 31, 2017:
HME TypeModelQuantity
Dozer ....................... Subscription required
Dragline ....................... Subscription required
Drill ....................... Subscription required
Excavator ....................... Subscription required
Shovel ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 1, 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
Subscription required 2014
Subscription required 2013
Subscription required 2012
Subscription required 2011

Corporate Filings & Presentations:

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