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Canada
Grande Cache (No. 8) Mine

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 Location:
17 km N from Grande Cache, Alberta, Canada

  Address:
PO Box 1702
Grande Cache
Alberta, Canada
T0E 0Y0
Phone  ...  Subscription required
Fax780-827-5044
WebsiteWeb
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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Coal (metallurgical)
Mining Method
  • Truck & Shovel / Loader
  • Room-and-pillar
Production Start...
Mine Life20 years (as of Jan 1, 2020)


Owners

Source: p. 5,15,17,25
CompanyInterestOwnership
CST Group Ltd. 88 % Indirect
CST Canada Coal Ltd. 100 % Direct
Grande Cache (No. 8) mine is 100% owned by CST Canada Coal Limited (“CST Coal”).

CST Group Limited (“CST”), via its indirect non-wholly owned subsidiary CST Canada Coal Limited (“CST Coal”), completed on 18 July 2018 (Alberta, Canada time) the acquisition of the mining assets of Grande Cache Coal LP. CST holds 88% interest in CST Coal.

Contractors

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Deposit Type

  • Sedimentary


Summary:

The coal resources and coal reserves reported herein are located in the western foothills of Alberta where a stratigraphic sequence of approximately 150 m of Lower Cretaceous non-marine clastic sediments contain seven coal seams ranging in thickness from 7 metres to 1.5 metres. The Company coal leases are within a larger area of economic coal measures known as the Smoky River Coalfield.

The deposit is extensively deformed by the compressive tectonics of the Laramide Orogeny, with thrust faulting and folding creating thickened coal zones up to 5 times the stratigraphic thickness of the seams. Fault throw is up to 2000 m, and fold amplitudes are up to 1500 m. Dips range from flat to vertical, with the limbs of major folds being generally deformed by smaller scale parasitic folding and imbricate small scale thrust faulting.

Surface resources areas are found within the most severely structured zones, where thickening of the coal seams under compressive tectonic forces is extensive. Underground resource areas are found is less structured areas where flat bottomed synclines, or gentle anticlines with limb dips of less than 25 degrees, lie between the more structured zones. These zones of gently dipping coal measures can be up to 2 km in width and in general do not show extensive structural thickening of the coal seams.

Coal quality of the various coal resource areas is well understood from an extensive database of exploration core sampling, explorat ........


Mining Methods

  • Truck & Shovel / Loader
  • Room-and-pillar


Summary:

The previous owner of the CST Canada Coal Limited property suspended surface operations in the No. 8 Mine February 1, 2015 and suspended underground mining operations in the No. 12 South B2 mine December 24, 2015.

After approximately 2 months of haul road rehabilitation and waste dump foundation preparation, completed while waiting for the lifting of the surface mine suspension by the Alberta provincial government regulatory authority, mining resumed in the West Extension pit phase of No. 8 Mine. From this resumption July 18, 2018 surface mining operations have been continuous until now.

The surface mines employ the truck and shovel operation generally employed in mountainous areas. The overlaying waste rock is drilled and blasted and then removed in benches. Bench height is 10 or 15 metres, depending on the size of loading units used. The waste is trucked to designated waste storage areas, located within prior disturbed areas wherever practical.

The last layer of waste is then cleaned off coal seams using tracked dozers and smaller backhoe units, and the coal loaded onto coal haulage units for transport to the washing plant. Usually coal from more than one source is produced at the same time to enable a proper coal blend designed to meet customer specifications.

The most recent underground mine at No. 12 South B2 was complete for the 7 Seam as of January 24, 2015, and the portal was sealed as per regulatory requirements, with fina ........


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits202120202019
Coal (metallurgical) Mt  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as clean coal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019
Stripping / waste ratio  ......  Subscription required  ......  Subscription required9.8
Coal tonnes mined  ......  Subscription required  ......  Subscription required0.38 Mt
Tonnes processed  ......  Subscription required  ......  Subscription required0.36 Mt of ROM coal
Coal washing plant annual capacity  ......  Subscription required  ......  Subscription required
Raw coal annual capacity  ......  Subscription required  ......  Subscription required
Annual production capacity  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at March 31, 2021:

CategoryOreTypeTonnage CommodityMarketable Coal
Proven In-Situ (OP) 22.3 Mt Coal (metallurgical) 15.3 Mt
Proven In-Situ (UG) 7.2 Mt Coal (metallurgical) 5.4 Mt
Proven Total 29.5 Mt Coal (metallurgical) 20.6 Mt
Probable In-Situ (OP) 1.2 Mt Coal (metallurgical) 0.8 Mt
Probable In-Situ (UG) 11 Mt Coal (metallurgical) 8 Mt
Probable Total 12.2 Mt Coal (metallurgical) 8.8 Mt
Proven & Probable In-Situ (OP) 23.5 Mt Coal (metallurgical) 16.1 Mt
Proven & Probable In-Situ (UG) 18.2 Mt Coal (metallurgical) 13.4 Mt
Proven & Probable Total 41.7 Mt Coal (metallurgical) 29.5 Mt
Measured In-Situ (OP) 230.5 Mt Coal (metallurgical)
Measured In-Situ (UG) 136.3 Mt Coal (metallurgical)
Measured Total 366.7 Mt Coal (metallurgical)
Indicated In-Situ (OP) 138 Mt Coal (metallurgical)
Indicated In-Situ (UG) 78.3 Mt Coal (metallurgical)
Indicated Total 216.3 Mt Coal (metallurgical)
Inferred In-Situ (OP) 53.1 Mt Coal (metallurgical)
Inferred In-Situ (UG) 23.4 Mt Coal (metallurgical)
Inferred Total 76.5 Mt Coal (metallurgical)
Total Resource In-Situ (OP) 421.6 Mt Coal (metallurgical)
Total Resource In-Situ (UG) 238 Mt Coal (metallurgical)
Total Resource Total 659.5 Mt Coal (metallurgical)



Heavy Mobile Equipment as of March 31, 2020:
HME TypeQuantity
Shovel ....................... Subscription required
Truck (haul) ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2015
Other 2015
Technical Report 2011
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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