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United States
Red Hills Mine

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 Location:
9 km NW from Ackerman, Mississippi, United States

  Address:
1000 McIntire Road
Ackerman
Mississippi, United States
39735
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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
  • Surface miner
  • Truck & Shovel / Loader
  • Dragline
Production Start...
Mine Life2032


Owners

Source: p. 9, 119
CompanyInterestOwnership
NACCO Industries Inc. 100 % Indirect
Mississippi Lignite Mining Company (operator) 100 % Direct
The Red Hills Mine, an active lignite surface mine in Mississippi, is owned and operated by Mississippi Lignite Mining Company, a wholly-owned subsidiary of North American Coal Corporation which is a wholly-owned subsidiary of NACCO Industries, Inc.

Contractors

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Deposit Type

  • Sedimentary


Summary:

The Red Hills Mine is in the Wilcox Group of Mississippi which is the most prolific lignite-bearing stratum in the state of Mississippi. The Wilcox Group and underlying Midway Group were deposited during Paleogene time; 66 to 23 million years ago. The most prominent characteristics of the Wilcox Group formations are the cyclical deposition and lateral persistence of the lithologic units, especially the lignite seams. The section from the Gravel Creek Member through the Tuscahoma Formation represents a transition from a transgressive sequence of valley fill, marginal marine strata (lower Gravel Creek) to predominantly regressive, nonmarine, deltaic strata (upper Gravel Creek through the Tuscahoma).

During each depositional geologic sequence, organic material was repeatedly buried by sediment in an ideal, oxygen-free environment. This ideal environment was attributed to the humid, subtropical conditions and high water-table of wetlands present during Paleogene time which prevented plant matter from decaying prior to burial. The oxygen-free environment combined with heat and pressure from continual deposition of overlying sediments allowed for the formation of peat and further mineralization of lignite over time by undergoing a process known as humification and biochemical gelification.

The regional structural geology is fairly consistent. The regional strike is northwest-southeast. The strata are nearly flat lying, dipping to the southwest at only 25 to 35 ........


Mining Methods

  • Surface miner
  • Truck & Shovel / Loader
  • Dragline


Summary:

The lignite at Red Hills Mine surface mining operation is recovered using dragline and conventional truck and shovel mining methods due to the proximity of the lignite to the surface and the physical characteristics of the deposit. Mining operations progress in a five-step process, which includes clear and grub, overburden and interburden removal, lignite production, spoil backfill and grading, and reclamation. In the development phase, drainage and water control were established, and then the required infrastructure consisting of power, mine office and maintenance facilities, lignite stockpile facilities, and roadways were established.

The Red Hills Mine began operations in the MS-002 permit area in Mine Area 1 (MA1) and is in the process of transitioning to the MS-004 permit area to Mine Area 3 (MA3). The initial boxcut construction for MA3 began in 2021 and mining in this area will continue through April 2032.

PIT DESIGN
To determine highwall stability, a circular arc failure approach has been utilized. A minimum FoS of 1.2 was calculated using the Modified Bishop Method for each highwall configuration that will be encountered by the mine. Due to the depth and multiple seam nature of the lignite deposit, benching will be required to allow for continuous burden removal and lignite mining. For individual slopes less than 80 feet, the highwall angle is stable up to 70 degrees. Between 80 and 180 feet, the effective slope angle decreases with a line ........


Crushing and Grinding


Processing


Summary:

The overall average quality of the mined lignite seams meets the quality specifications stated in the LSA without beneficiation. No mineral processing is performed by MLMC.


Production:

CommodityUnits2021202020192018201720162015
Coal (thermal) tons  ......  Subscription required  ......  Subscription required  ......  Subscription required2,939,7382,373,5222,766,0912,976,276
Heat ContentBTU/lb5,1005,2005,2005,2005,2005,200
Sulfur%0.60.60.60.60.60.6
All production numbers are expressed as ROM coal.
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Operational Metrics:

Metrics202120202019201820172016
Coal tonnes mined  ......  Subscription required  ......  Subscription required2.7 M tons2.94 M tons2.37 M tons2.77 M tons
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Reserves at December 31, 2021:
Summary Mineral Reserves as of December 31, 2021 based on cut-off grades of Mississippi Lignite Mining Company - $28.04/ton.
Summary Mineral Resources as of December 31, 2021 based on cut-off grades of Mississippi Lignite Mining Company - $30.00/ton.

CategoryTonnage Commodity
Proven 17,167,900 tons Coal (thermal)
Probable 9,447,600 tons Coal (thermal)
Proven & Probable 26,615,500 tons Coal (thermal)
Measured 11,475,500 tons Coal (thermal)
Indicated 16,169,100 tons Coal (thermal)
Measured & Indicated 27,644,600 tons Coal (thermal)



Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelSizeQuantity
Backhoe ....................... Subscription required ....................... Subscription required
Backhoe ....................... Subscription required 5 cu. yd ....................... Subscription required
Backhoe ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Dragline ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required ....................... Subscription required
Shovel (rope) ....................... Subscription required 41 cu. yd ....................... Subscription required
Surface miner ....................... Subscription required ....................... Subscription required
Truck ....................... Subscription required 40 tons ....................... Subscription required
Truck (dump) ....................... Subscription required 140 tons ....................... Subscription required
Truck (dump) ....................... Subscription required 150 tons ....................... Subscription required
Truck (dump) ....................... Subscription required 200 tons ....................... Subscription required
Truck (water) ....................... Subscription required 21000 gallons ....................... Subscription required
Truck (water) ....................... Subscription required 32000 gallons ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 21, 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 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Form 10-K 2018
Other 2018
Form 10-K 2017
Other 2017
Form 10-K 2016
Other 2016
Other 2016
Form 10-K 2015
Other 2015
Other 2011
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