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United States
Trapper Mine

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 Location:
10 km S from Craig, Colorado, United States

  Address:
25910 State Highway 13
Craig
Colorado, United States
81625
Phone  ...  Subscription required
Fax(970)-826-6136
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
  • Dragline
  • Backfill
Production Start...
Mine Life2025


Owners

Source: p. 33
CompanyInterestOwnership
Trapper Mining Inc. (operator) 100 % Direct
Trapper Mining, Inc., is organized as a cooperative and is the owner and operator of the Trapper Mine near Craig, Colorado.
In December 2020, upon termination of Tri-State Generation and Transmission Association Inc. coal supply agreement with Trapper Mining, Tri-State withdrew from membership in Trapper Mining.

Contractors

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Deposit Type

  • Sedimentary


Summary:

The Trapper Mine is located in the Yampa coal field that is composed of coal-bearing rocks that are Upper Cretaceous in age. The coal-bearing rocks mainly outcrop south of the Yampa River in northwest Colorado. The Yampa coal field extends east to west about 50 miles (80.5 km) and is about 40 miles (64.4 km) north to south.

The surface bedrock in the Trapper Mine Project Area is mainly the Upper Cretaceous Williams Fork Formation, which is part of the Mesaverde Group, a regional unit that contains a large coal resource in northwest Colorado (Brownfield and Johnson 2008). The Williams Fork Formation consists of interbedded sandstones, siltstones, shale, and coals and crops out along a six-mile-wide (9.7-km) belt that extends along the entire length of the Williams Fork Mountains (Tweto 1976). The Williams Fork Formation is underlain by the Illes Formation, also part of the Mesaverde Group. The Illes Formation is lithologically similar to the Williams Fork Formation consisting of sandstones, mudstones, carbonaceous shale, and coal (Brownfield and Johnson 2008). The Lewis Shale, which is stratigraphically higher than the Mesaverde Group, outcrops in the northern extremity of the SMCRA permit area. The Lewis Shale also is Upper Cretaceous in age and is composed of uniform dark-gray marine shale, but also contains thin sandstones (Johnson 1987; Tweto 1976). Surficial deposits consist of alluvium, residuum derived from the Williams Fork Formation and the Lewis Shale, and ........


Mining Methods

  • Truck & Shovel / Loader
  • Dragline
  • Backfill


Summary:

Coal mined at the Trapper Mine is delivered by truck to the Craig Station at an average rate of approximately 2.3 mtpy (with a maximum rate of 2.6 mtpy). The coal is mined from seven coal seams of the Upper Williams Fork Formation: the “H,” “I,” “K,” “L,” “M,” “Q,” and “R” seams. Within the Project Area, the “R” seam is too deep for surface mining. Draglines were the primary earthmoving equipment used until October 8, 2006, when a 250-acre landslide occurred within the Project Area. Following the landslide, mining has been accomplished by a combination of dragline, dozer, and truck and loader operations, depending on the depth and material being mined.

The overburden, or rock that lies above the coal seams to be mined, is drilled and blasted to break up the rock to allow it to be moved using the mining equipment. Blasting is performed using an ammonium nitrate and fuel oil (ANFO) mixture. After overburden blasting is completed, the overburden removal begins. For the Project Area, overburden removal would occur primarily using trucks and loaders. The maximum coal depth for the Project Area would involve the initial use of trucks and loaders because the draglines cannot economically remove materials deeper than 200 feet. The overburden ranges in depth from 100 to 150 feet.

Following removal of overburden by the trucks and loaders, dozers scrape the remaining thin layer of overburden material to expose the uppermost coal seam. Coal is either ripped with a d ........


Crushing and Grinding


Processing



Production:

CommodityUnits2021202020192018201720162015
Coal (thermal) tons  ......  Subscription required  ......  Subscription required  ......  Subscription required2,140,4611,576,6191,809,3252,119,381
All production numbers are expressed as ROM coal.
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Operational Metrics:

Metrics2016
Stripping / waste ratio 10 bcy/t

Reserves at :




Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Dragline ....................... Subscription required Jun 9, 2021
Excavator ....................... Subscription required 36.6 cu. yd ....................... Subscription required Mar 26, 2018
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 24, 2021
....................... Subscription required ....................... Subscription required Subscription required Jun 24, 2021
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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

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Other 2018
Press Release 2016
Project Description 2016
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