(a) General rule.--For the purpose of conducting a survey as may be required by council, the city engineer or other registered professional engineer employed by the city may: (1) enter and survey a mine or colliery within the limits of the city, in whole or in part, at all reasonable times, either by day or night, without impeding or obstructing the workings of the mine or colliery; and (2) take with them other persons necessary for the purpose of making a survey. (b) Duty to provide entry, survey and exit.--The owner, operator or superintendent of the mine or colliery shall furnish the means necessary for the entry, survey and exit.
Pennsylvania Legal Code