The program is aimed at individuals who spend time enjoying outdoor activities, but also at children who may be tempted to play on the property of both active and abandoned operations.

According to the agency, there have been more than 200 deaths in recreational accidents at or near underground and surface mines since 1999, 30 of which occurred last year in the 17–51 age range.

The common visualisation of a mine property-related accident, falling down a mine shaft, is just one example of the injuries and deaths reported to the Mine Safety and Health Administration each year. Weak-roofed tunnels, gasses and unused explosives are other hazards.

The campaign, in its ninth year, will extend from March 19 to April 20. Also included is public outreach to schools and other events.

“There are about 500,000 abandoned mines and another 14,000 active operations throughout the United States,” said MSHA assistant secretary Richard Stickler.

“Many of them contain hidden hazards and, for those not trained to work in mines, the outcome can be deadly.

“That’s why we urge hikers, bikers, rock hounds and swimmers to Stay Out and Stay Alive.”