Wyoming Statutes Title 30. Mines and Minerals § 30-2-406. Barrier pillars required; penalty for failure to leave

(a) The operator of every mine which has another coal or mineral property contiguous or immediately adjacent to it shall leave barrier pillars at least fifty (50) feet in width along the boundary line of the contiguous coal or mineral property. Owners of adjacent properties are not prohibited from extracting the coal or mineral along the boundary line if they enter into a written agreement providing the pillars may be pulled.

(b) Any person violating subsection (a) of this section is guilty of a misdemeanor punishable by a fine of not less than five hundred dollars ($500.00) nor more than one thousand dollars ($1,000.00), or by imprisonment of not more than six (6) months, or both.