That's like building your house near areas of historic mining activity, it's fair to assume that they won't randomly vanish down a big hole.
Best to make sure the work is structurally sound at some point.
@Ramsaye started
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That's like building your house near areas of historic mining activity, it's fair to assume that they won't randomly vanish down a big hole.
Best to make sure the work is structurally sound at some point.