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UP RR photo of the conveyors and load-out silos at Black Thunder Mine near Wright WY http://www.uprr.com/aboutup/photos/dieselfreightaction/coal/95-15.shtml Article re: Black Thunder http://www.mining-technology.com/projects/thunder/ The big drag line at Black Thunder http://www.mining-technology.com/projects/thunder/thunder4.html Just for sense of scale, you could drive 2 full size pick up trucks, side-by-side into the bucket on Ursa Major. Official Black Thunder website http://www.archcoal.com/aboutus/blackthunder.asp Bureau of Land Mgt site for the Powder River mines http://www.wy.blm.gov/minerals/coal/prb/prb.htm
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