it still deserves protection and for the same reasons and in the same way caves are…
cave protection act
http://www.law.cornell.edu/uscode/16/usc_sup_01_16_10_63.html
For all the talk AMR people spend trying to explain why a mine is not a cave, they never tell you that many mines open into natural caves, and ought to be preserved, but the bureacrats still want them closed.
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