Abandon Mines Are Unstable:
Mine shafts are vertical mine openings. They represent the number one cause of death and injury in abandoned mines. Because no light enters a mine shaft, the depth is difficult to assess. The shaft collar may be loose and unconsolidated. This material can break away, causing individuals to fall into the shaft. Darkness, loose debris, false floors, rotten timbers, and water can hide vertical openings.
Explosives become highly unstable with time and when exposed to the elements. Old dynamite often contains nitroglycerine, which can explode with the slightest disturbance. Perhaps the most dangerous explosives are blasting caps. Rodents can scatter blasting caps on the mine floor. If stepped on, they will explode. A blasting cap resembles a firecracker with wires
Highwalls are vertical cliffs. They are common features of open pit mines and quarries which can be unstable and prone to collapse. Do not stand near or under highwalls nor attempt to climb them
Unpredictable:
Mines are not caves. Caves are formed naturally over thousands or even millions of years. Mines are man-made by blasting, which fractures and weakens the surrounding rocks. Vibrations from walking or even speaking can cause an abandoned mine to cave in.
Abandoned mines are not ventilated. Consequently, pockets of deadly air and gases can be present. Even experienced cavers can die exploring mines, due to lack of oxygen.
Structures are dilapidated. Support timbers, headframes, ladders, pump jacks, tanks, and other related structures may seem safe and solid; but rotted wood will easily crumble under a person's weight. Don't be fooled by appearances. Do not climb on, around, or under structures.
Animals live in abandoned mines. Rattlesnakes, bats, bears, or mountain lions can den or escape the heat in the dark recesses of a mine. Underground mines can be critical habitat for such species. You should not disturb them.
Unsafe:
Bad Air is oxygen-deficient or toxic air that can build up in abandoned mines, causing dizziness or even unconsciousness. Bad air is odorless and tasteless. Carbon monoxide and carbon dioxide often collect in low areas or along the floor in horizontal workings.
The motion of walking can cause bad air to mix with good air.
Radioactivity is the result of the natural decay process of radioactive minerals (uranium, vanadium, etc.). The effects of radiation exposure are cumulative through a lifetime. Excessive exposure can be harmful or eventually fatal. Many abandoned uranium mines in southern Utah are potential sources of radiation.
Hazardous Waste such as bags or drums of chemicals used in mining, milling or drilling operations can pose a threat when touched or smelled by an uninformed person. Illegal dumping of industrial hazardous waste can also occur.
Water Hazards occur in flooded abandoned mines. Shallow water can conceal drop-offs (winzes), sharp objects, and other hazards. You can drown in a water-filled shaft.
We Need Your Help:
Abandoned mines are hazardous and should be left alone. For your own safety and the safety of others, do not try to enter abandoned mines. Vandalism of closures endangers innocent people and wastes tax dollars.
To learn more about the dangers of abandoned mines, call the BLM or the State of Utah for a copy of a public safety video entitled "STAY OUT and STAY ALIVE: Abandoned Mine Safety".