Wyoming Coal Mining
Автор: Wyoming Geological Survey
Загружено: 2014-09-10
Просмотров: 66982
Описание: Since 1974, surfacing mining has occurred in the Powder River Basin when the first trains full of coal left en route to states across the nation. This short video, produced in 2014 by the WSGS, showcases operations at the Arch Coal's Black Thunder Mine.
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