In all underground workings approaching property lines, a barrier pillar shall be left at least fifty feet on each side of the property line; but said barrier pillars may be removed upon mutual agreement of the operators in writing.
C.R.S. § 34-24-109
Barrier pillar at property line
Digitized from: Public.Law — Colorado Revised Statutes. Reproduced from public-domain Colorado statutes; confirm against the official source for the current text. Not legal advice.