It shall be unlawful for any owner, lessee, contractor, prospector, utility company, or individual within the corporate limits of the city, to have a mine shaft, prospect hole, or other excavation endangering life and/or safety that are not securely covered, fenced, or protected by other appropriate safeguards when not in operation; and securely guarded when in operation. Unauthorized entry of mines and removal of warning signs is prohibited. Any violating responsible party or parties shall be guilty of a misdemeanor. Each day such violation is allowed to continue shall constitute a separate offense. (Ord. 76-77-05, 2-9-1977)