Pennsylvania Statutes Title 52 P.S. Mines and Mining § 70-305. Mine worked out maps extended; certified copies

When any coal mine or colliery is worked out preparatory to being abandoned, or when any lift thereof is about to be abandoned, the operator or superintendent of such coal mine or colliery shall have the maps or plans thereof extended to include all excavations, as far as practicable, and such portions thereof as have been worked to the boundary lines of adjoining properties; or any part or parts of the workings of which it is intended to be allowed to fill with water, must be surveyed in duplicate and such surveys must practically agree, and certified copies be filed with the inspector of the district in which the mines are situated.