How to find underground cavities below properry

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I purchased land in an area that was near a former mine. From geological maps, I see the official location of the mine is several blocks away from my property, however, locals told me there were rumors the miners made illegal tunnels. Is there any way I can "scan" the ground to identify if there is any mine shaft under the property that could lead to a sinkhole?

Best Answer

There is equipment such as "Ground Penetrating Radar" that can reveal underground artifacts without excavation but the range of such equipment is fairly limited.

Another option is to have some "core drill" samples taken on the property, usually in a grid-pattern, to identify any voids or other unexpected materials that may lie beneath the area. These can pretty much go as deep as your budget allows.

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