Sign at the Westmoreland Coal Company mine site in Sarpy Basin, 06/1973.
Size: 1717px × 1164px
Photo credit: © PF-(usna) / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: .., agency, archives, boyd, boydnorton, documerica, environmental, environmentalprotectionagency, historic, history, nara:arcid=549129, national, norton, protection, usa, usnationalarchives