Records of the Environmental Protection Agency. 1944 - 2006. DOCUMERICA: The Environmental Protection Agency's Program to Photographically Document Subjects of Environmental Concern. 1972 - 1977. MINER LEE CALDWELL, ON A SELF-PROPELLED ROOF BOLTING MACHINE IN A MINE OF THE TENNESSEE CONSOLIDATED COA

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Records of the Environmental Protection Agency. 1944 - 2006. DOCUMERICA: The Environmental Protection Agency's Program to Photographically Document Subjects of Environmental Concern. 1972 - 1977. MINER LEE CALDWELL, ON A SELF-PROPELLED ROOF BOLTING MACHINE IN A MINE OF THE TENNESSEE CONSOLIDATED COAL COMPANY NEAR JASPER AND CHATTANOOGA. THE MACHINE HAS A DRILL THAT BORES HOLES IN THE CEILING OF THE SHAFT AND AUTOMATICALLY SCREWS FOUR TO FIVE FOOT BOLTS WHICH ACT AS BRACES TO KEEP THE ROOF FROM FALLING. IN THE UPPER FOREGROUND IS A BOLT THAT HAS JUST BEEN DRILLED IN. THIS METHOD CUTS DOWN ON THE NUMBER OF WOOD POSTS NEEDED AS BRACING. THIS IS THE MOST DANGEROUS JOB IN THE MINES

https://catalog.archives.gov/id/556514

National Archives at College Park

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SNAC Resource ID: 6472447

National Archives at College Park

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Corn, Jack, 1929-

http://n2t.net/ark:/99166/w6bh8rm9 (person)

Jack (John Felton) Corn, educator, author, photojournalist, air force photographer, was born in Nashville, Tennessee on January 14, 1929. Corn is retired from Western Kentucky University Journalism program as Professional Photojournalist-in-Residence (1990-1995). He is recognized by Board of Regents as Photojournalism Professional-in-Residence of Journalism, Emeritus effective October 26, 2004. He was Director of Photography of the Chicago Tribune from 1984 to 1991, and during which time the Tri...