These are some of the most dangerous environments you can enter. Never access an abandoned mine of any sort without the proper training, people, equipment, and procedures in place. Mines were not designed to last for centuries, yet many were built centuries ago leaving perilous conditions behind. Unstable rock, old rotted timber supports and ladders, unexpected drops (winzes), sudden roof collapses, invisible (flammable) gases, rattlesnakes and being buried alive are very real possibilities among many others.
Deadly flammable gasses and black damp are of special concern in coal mines, in addition to the already formidable list of dangers listed above. Barometric changes above ground can cause the airflow underground to change, moving bad air into the area you are, or were; making escape impossible.
STAY OUT AND STAY ALIVE.
Limestone Mine | New York
Alpha Cement | Pennsylvania
Alpha Cement No.2 | Pennsylvania
Limestone Mine No.2 | Self Portrait for Scale
Concrete Plant | Detroit
Concrete Plant | California
Limestone Mine No.3 | New York
Limestone Mine No. 4 | New York
Limestone Mine No. 5 | New York
Limestone Mine No. 6 | New York