Mining Intelligence and News
United States

Schrock Run/Schrock Run Extension Mine

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Categories

Summary

Mine TypeOpen Pit
StatusTemporary Suspension
Commodities
  • Coal (metallurgical)
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
  • Contour Strip
  • Highwall
Mine Life... Lock
SnapshotSchrock Run (including the associated Schrock Run Extension area) is an active surface mining area scheduled to be completed in 2025. Schrock Run highwall mining operates in 2024 to 2026.

The Shaffer property is proposed as replacement production upon depletion of the Schrock Run/Schrock Run Extension operations and is scheduled to operate from 2025 to 2030. Will Farm is a proposed surface mining area not yet permitted that is scheduled to operate from 2025 to 2032.

On January 6, 2025, the owner of the mine, Corsa Coal Corp., initiated bankruptcy proceedings. Corsa Coal auctioned its assets to pay creditors. This included the sale of two preparation facilities located in Somerset County, Pennsylvania: the Cambria plant and the Shade Creek coal preparation plant, where coal was processed from the Schrock Run/Schrock Run Extension mine, to Rosebud Mining Company in April 2025.

Owners

SourceSource
CompanyInterestOwnership
Corsa Coal Corp. 100 % Indirect
Corsa Coal indirectly owns Schrock Run Extension through PBS Coals, Inc.

On January 6, 2025, Corsa Coal Corp. announced that it and each of its subsidiaries (collectively, the “Corsa Group”), filed for voluntary chapter 11 relief in the U.S. Bankruptcy Court for the Western District of Pennsylvania and intend to conduct a sale of assets pursuant to Section 363 of the U.S. Bankruptcy Code.

Contractors

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Deposit type

  • Sedimentary

Summary:

Geology of the Properties
The geology of the properties is consistent with regional structural trends. In Maryland, the local Casselman synclinal fold is evident in the Casselman mine. Coal seams of economic importance on the properties typically range from 1 foot to 6 feet in thickness and are primarily low-volatile in rank. There are 11 coal seams on the properties that demonstrate reserve or resource potential including, in descending stratigraphic order: Sewickley, Redstone, Pittsburgh, Bakerstown, Upper Freeport, Lower Freeport, Upper Kittanning, Middle Kittanning, Lower Kittanning, Brookville, and Mercer.

Mineralization
Mineable coal seams within the properties are typically low-ash, low to high-sulfur, and high-thermal content bituminous coals. Regionally, the coals are typically low-volatile in rank, with rank increasing from west to east. The maximum seam thickness may reach over 6.0 feet where multiple coal benches occur in proximity to one another; however, the average mineable thickness of the seams in this evaluation generally ranges from 1 foot to 4 feet. Seams are generally continuous but may be locally absent. Secondary discontinuity due to erosional features is present in most areas, resulting in seam outcropping, or visible exposure of the seam at the surface. Other than oxidation of the coal exposed at the surface, erosion of the seams has no significant impact on the mineralized deposits. Mineable seams associated with the properties are generally outcrop-accessible. Coal seams are characterized by both single-bench and multiple-bench coal horizons with parting (non-coal) material varying by seam and area. Seam parting is common within the coal seams on the properties with intra-seam parting material increasing drastically in some areas. Roof strata are typically shale or sandy shale with zones of sandstone roof being common. Floor strata are typically sandstone, shale, sandy shale, fireclay, or in the case of the Upper Kittanning, limestone.

Limestone beds occur within the various stratigraphic groups of the region. Some of these limestone beds are extracted in conjunction with surface mining of the Sewickley coal in particular.

Schrock Run – Lower Freeport and Upper Kittanning Seams Reserve
This property is immediately west of the Cambria Preparation Plant. The Lower Freeport seam has been previously surface and underground mined within the project boundary of this property. Lower Freeport reserve tonnage will include some surface remining of existing underground mine workings. The Upper Kittanning seam reserves include highwall mining tons. The highwall mining area was previously designated for auger mining.

The Schrock Run (including the associated Schrock Run Extension area) property is active. Surface mining rights are reported as controlled on this property, the mineral is controlled through lease and ownership and the reserves are permitted. Surface mining ratios are 31.8: 1 within the reserve area.

Deposit Types
The coal reserves reported herein are bituminous coals. The primary coal-bearing formations on the properties are Carboniferous in age, being in the Pennsylvanian system, which includes the Monongahela, Conemaugh, Allegheny, and Pottsville groups. The average mineable seam thickness for coal horizons in these formations ranges from 1 foot to over 6 feet. The coal seams are generally continuous and non-complex but may vary in thickness and may also be locally absent. Seams retain normal stratigraphic sequence throughout the properties and no evidence has been observed that seams have been modified from pre-deformational thicknesses.

Reserves

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Mining Methods

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Heavy Mobile Equipment

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Commodity Production

Roughly 50% of the proposed production planned for the thermal market is assumed to be washed, while the remainder of the thermal coal product is assumed to be shipped raw to customers.
CommodityUnits20242023202220212020201920182017
Coal (metallurgical & thermal) tons  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe157,92745,59226,699

Operational metrics

Metrics20232022
Stripping ratio  ....  Subscribe  ....  Subscribe
Coal tonnes mined  ....  Subscribe  ....  Subscribe

Production Costs

Commodity production costs have not been reported.

Aerial view:

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