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u.s. longwall census continued 24 www.coalage.com February 2012 Mine Company (parent) ALABAMA (6) Blue Creek No. 4 Walter Energy Blue Creek No. 7 Walter Energy Seam Blue Creek/ Mary Lee Blue Creek/ Mary Lee Blue Creek/ Mary Lee North River No. 1 Walter Energy Oak Grove Cliffs Resources Shoal Creek Drummond Co. Inc. COLORADO (5) Bowie Mines No. 2 (idle) Bowie Resources Deserado Blue Mountain Energy Elk Creek Oxbow Mining Twentymile Peabody Energy West Elk Arch Coal ILLINOIS (4) Mach Mining Foresight Energy New Era AmCoal New Future AmCoal Sugar Camp Foresight Energy MONTANA (1) Bull Mountain Mine Signal Peak Energy Pratt Blue Creek Mary Lee/ Seam height (inches) (inches) Cutting Panel width (ft) height Panel length (ft) 45 53 53 65 60- 72 84- Blue Creek 132 B B D Wadge E Herrin No. 6 Herrin No. 6 Herrin No. 6 Herrin No. 6 144- 240 84- 168 108- 180 108 84- 216 85 69 80 70 72 84- 132 108- 132 132 132 108 96- 156 72 65- 70 65- 70 72 74- 84 65- 70 65- 70 850 850 850 2,600 - 4,900 8,800 12,600 8,500- 1,040 12,000 944 8,000 1,000 11,000 Over- burden (ft) No. of gate entries Depth of cut (inches) Shearer 1,600 1,600 1,600 400- 600 1,000 1,150 845 800 805 7,000 11,000 6,800 12,000- 1,000 15,000 10,250- 1,080 16,000 1,100- 1,700 400- 900 500- 2,000 1,400- 1,650 600- 1,200 3 3 3 30 39.4 42 4 4 4 3 3 3 36 36 36 36 42 42 Joy 7LS-1D DDR 1,650 Joy 7LS-1D DDR 1,650 Joy 7LS-1D DDR 1,650 Joy 7LS1A DDR 1,625 Joy 7LS1 DDR 1,250 Joy 7LS5 DDR 2,091 3 3 36 32 Cat EL2000 DDR 1,690 Joy 4LS5 DDR 1,249 Joy 7LS3A DDR 1,692 Joy 7LS5 DDR 2,360 Haulage system Ultratrac 2000 Ultratrac 2000 Ultratrac 2000 Ultratrac 2000 Ultratrac 2000 Ultratrac 2000 Roof support yield (tons) Joy 1,300 Cat 1,243 Joy 1300 Cat 813 Joy 875 Joy 955 Dynatrac Ultratrac 2000 Jumbotrac 2000 Jumbotrac 2000 Cat EL3000 Jumbotrac DDR 2,805 1,400 19,000 1,150 12,000 1,150 6,000 72 — — 500 650 350 600 3 3 3 3 42 34 32 42 Joy 7LS2A DDR 2,000 Joy 7LS1A DDR 1,625 Joy 7LS1A DDR 1,625 Joy 7LS2A DDR 2,000 Joy 7LS5 Mammoth 120 120 1,250 21,500 450 3 42 DDR 2,400 Ultratrac 2000 AEMI 2010 AEMI 1500 Ultratrac 2000 Jumbotrac 2000 Cat 813 Joy 910 Cat 813 Cat 1,327 Cat 1,271 Cat 1,200 AEMI 1,000 Cat 817 Cat 1,200 Joy 1,170 Face conveyor type (strand, motors) JWR 42 TIB 3x700 JWR 42 TIB 3x1,000 JWR 42 TIB 3x1,000 Longwall Associates 42 TIB 3x1,000 Longwall Associates 42 TIB 3x800 Caterpillar 48 TIB 3x1,000 Caterpillar 34 TIB 2x600 Joy Mining Machinery 38 TIB 2x900 Caterpillar 42 TIB 3x800 Caterpillar 42 TIB 3x1,250 Caterpillar 48 TIB 3x1,650 Caterpillar 48 TIB 3x1,900 AEMI 48 TIB 3x1,000 AEMI 42 TIB 3x1,000 Caterpillar 48 TIB 3x1,900 Caterpillar 48 TIB 3x1,650 Face conveyor width (mm)/ speed (fpm) 1,000/ 305 1,000/ 305 1,000/ 305 890/ 350 1,000/ 300 1,342/ 290 1,000/ 280 860/ 450 988/ 260 1,188/ 365 1,342/ 365 1,142/ 371 1,000/ 370 890/ 370 1,142/ 371 1,242/ 365 Stageloader type width, speed JWR 1,300 mm, 420 fpm JWR 1,300 mm, 420 fpm JWR 1,300 mm, 420 fpm Longwall Associates 1,294 mm, 490 fpm Joy Mining Machinery 1,294 mm, 490 fpm Caterpillar 1,424 mm, 385 fpm Caterpillar 1,000 mm, 350 fpm Joy Mining Machinery 1,220 mm, 410 fpm Caterpillar 1,388 mm, 423 fpm Caterpillar 1,588 mm, 520 fpm Caterpillar 1,380 mm, 464 fpm Caterpillar 1,388 mm, VFD MEC 1,300 mm, 475 fpm MEC 1,024 mm, 475 fpm Caterpillar 1,388 mm, VFD Caterpillar 1,388 mm, 464 fpm Cat Cat MEC MEC Cat Cat Joy Cat Cat Cat JWR JWR JWR Longwall Associates Longwall Associates Cat Crusher Electrical controls Tri- Tech Tri- Tech Tri- Tech Service Machine Line Power Service Machine Service Machine Service Machine Service Machine Service Machine Service Machine Intermountain Electrical MCI MCI Intermountain Electrical Service Machine 4,160 2,300 2,300 2,300 4,160 4,160 4,160 4,160 4,160 2,300 4,160 4,160 Voltage to face 4,160 4,160 4,160 4,160