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| View Original: | Fan,_Virginia_Coal_Mine_Ventillation.png (576x291) | |||
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| Keywords: Fan, Virginia Coal Mine Ventillation.png LARGE FAN EQUIPMENT USED TO BLOW FRESH AIR INTO VIRGINIA-POCAHONTAS COAL COMPANY MINE 2 NEAR RICHLANDS VIRGINIA IT TAKES A TREMENDOUS AMOUNT OF POWER TO FORCE THE AIR INTO ALL THE TUNNELS OF THE MINE IT IS WINDY IN THE MAIN SHAFTS AS THE AIR PASSES BY ON ITS WAY TO THE MANY TUNNELS 04/1974 Image created by the Environmental Protection Agency http //media nara gov/media/images/15/9/15-0830a gif Source PD-USGov Ventilation fans Mine ventilation Mining in Virginia | ||||
