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Buchanan No. 11 Mine Ventilation Shaft

Contractor: Frontier-Kemper Constructors, Inc.
Owner: CONSOL Energy
Location: Whitewood, Virginia
Project Description: Construction of a mine ventilation shaft. The shaft will be 22 ft. in diameter by approximately 2,100 ft. deep and will have two water rings and a shotcrete lined four-way station.

Deer Creek Vent Facilities

Contractor: Frontier-Kemper Constructors, Inc.
Owner: Mountain Coal Company / Arch Coal, Inc.
Location: Near Paonia, Colorado
Project Description: Work includes construction of two shafts. The main shaft is a 24 ft. finished by approximately 350 VF deep shaft. The collar for this shaft will be constructed thru 80 ft of difficult overburden conditions using a secant pile wall for initial support followed by installation of a final reinforced concrete lining. The rock section of the shaft will be constructed by raise boring a 20 ft diameter pilot hole and then slashing the shaft to 26 ft diameter and installing a 24 ft diameter reinforced concrete final lining. A shaft station will be constructed with shotcrete support. The second shaft is an emergency escape shaft and will be raise bored to a diameter of 8 ft and then concrete lined to a final diameter of 6 ft. The overburden for this shaft will be supported by installing a secant pile wall to the top of rock.

River View Shaft & Slope

Contractor: Frontier-Kemper Constructors, Inc.
Owner: Alliance Coal / River View Coal, LLC
Location: Uniontown, Kentucky
Project Description: This project involves construction of an approximately 15 ft. wide by 16 ft. high by 1,500 ft. long slope with a divider deck. The slope will access two coal seams: the No. 11 seam is the upper seam and the No. 9 seam is the lower seam. A turnout and some initial development will be constructed from the slope at the No. 11 seam. Slope construction then continues to the No. 9 seam where a turn-out, sump and initial level development will be constructed. The contract also includes construction of a 30 ft diameter service shaft with a depth of approximately 450 VF plus a 35 VF deep sump. The shaft will be excavated conventionally and lined with a concrete lining. A vertical divider wall will partition the shaft into return and intake airways.

Shoemaker Slope

Contractor: Frontier-Kemper Constructors, Inc.
Owner: CONSOL Energy
Location: Near Wheeling, West Virginia
Project Description: Work consists of the construction of the new conveyor slope for Consol Energy’s Shoemaker Mine near Wheeling, West Virginia. The slope will be a 16 ft. wide by 10 ft. high single heading slope at 16 degrees with a length of approximately 1,250 ft. The work also includes construction of a large bottom station to accommodate a belt transfer unit and about 230 ft of mine entry development work which extends from the station into the existing mine.

Doe Run Raise Shafts

Contractor: Frontier-Kemper Constructors, Inc.
Owner: The Doe Run Company
Location: Near Viburnum, Missouri
Project Description: Work includes raise boring four ventilation shafts. The shafts will be located near Viburnum and Bixby, Missouri at several of the Doe Run Mines in the area – the Brushy Creek Mine, Casteel Mine, and No. 29 Mine. The four shafts will be constructed consecutively. All shafts are 6 ft. diameter raises ranging from about 600 ft. to approximately 1,000 ft. in depth. Steel casing will be installed through the overburden which varies between 50 ft. and 150 ft. in depth.

Rosebud Mining Vent Shaft

Contractor: Frontier-Kemper Constructors, Inc.
Owner: Rosebud Mining Company
Location: Kittanning, Pennsylvania
Project Description: Construction of the Slate Lick Vent Shaft at Rosebud Mining Company's Clementine Mine located in Kittanning, Pennsylvania. The project includes the construction of a 10 ft. diameter (8 ft. finished) by 430 ft. deep raise bored ventilation shaft.