Water-filled quarries, which claim the most lives through drownings, have slippery slopes and unstable rock ledges. The water, which looks inviting, may conceal old machinery and sharp objects left behind after a mining operation closes. Even expert swimmers have encountered trouble in the dangerously cold and deceptively deep waters — and they can’t rely on lifeguards to rescue them.

Old surface mines, such as sand and gravel pits, are popular with ATV enthusiasts. However, they often contain hills of loose materials in stockpiles or refuse heaps that can easily collapse and cause deadly rollovers.

For more information about “Stay Out-Stay Alive,” go to www.msha.gov/SOSA/SOSAhome.asp.