Permafrost Tunnel Research Facility - PTRF
FOX, Alaska -- Permafrost - ice wedges - ice lenses - other permafrost features - bones from the Pleistocene Epoch: bison, mammoth… Excavated from 1963–1969 for the study of permafrost, geology, ice science, and mining and construction techniques specific to permafrost environments, the PTRF is one of the U.S. Army Corps of Engineers and the nation's unique, natural research facilities. The U.S. Army Cold Regions Research and Engineering Laboratory operates, maintains and delivers research at this field site for the nation and the world as part of its mission for the U.S. Army Engineer Research and Development Center. The PTRF in Fox, Alaska - available for scientific research projects studying a frozen environment over 40,000 years old – Contact us > (Photo courtesy of Matt Nolan, Ph.D., University of Alaska Fairbanks)

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Photo by: Matt Nolan |  VIRIN: 100115-A-A1403-001.JPG