Okla. Stat. tit. 45, § 45-436: Open mine shafts - Covering - Approval - Penalties

Any person, firm or corporation, who knowingly maintains, uses

or abandons an open vertical mine shaft wherein lead, zinc or other

metals have been sought or produced, without covering suitably, or

surrounding such installations with protective fencing, or plugging

and filling, the particular method used to be approved by the Chief

Mine Inspector's Department, shall be deemed negligent as a matter

of law and shall be guilty of a misdemeanor, and upon conviction

thereof shall be fined not more than Five Hundred Dollars ($500.00)

or imprisoned for not more than one (1) year, or both such fine and

imprisonment.