The mayors of cities, boroughs and incorporated towns, the boards of township commissioners or supervisors of townships of the second class, and the county commissioners of any county in which the mining of bituminous coal is conducted and such engineers and other agents as they may employ or appoint, shall, at all reasonable times, be given access to any portion of any bituminous coal mines or mining operations which it may be necessary to inspect for the purpose of determining whether the provisions of this act are being complied with, and all reasonable facilities shall be extended by the owner or operator of such mine or mining operation for ingress, egress or inspection. The mine inspector for the district in which the mine or mining operation is located shall be required to accompany the mayors of cities, boroughs and incorporated towns, the boards of township commissioners or supervisors of townships of the second class, the county commissioners of any county in which the mining of bituminous coal is conducted, and such engineers and other agents as they may employ for purposes of inspection to determine whether the provisions of this act are being complied with.