§ 33.181. Definitions.

 The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:

   Blaster, shooter or shot firer—Any person who has a valid blaster’s license issued by the Commonwealth.

   Cavern—All underground workings and excavations, shafts, tunnels, slopes, drifts, and other openings which are being sunk or driven, together with all roads, appliances, machinery and material connected with them.

   Class A magazine—The principal magazine used for the storage of the main supply of explosives and constructed in accordance with the specifications contained in Chapter 5, Subchapter D (relating to explosives).

   Class B magazine—A magazine located in remote and unused sections of a cavern in the outlet airway and constructed in accordance with the specifications of Chapter 5, Subchapter D.

   Contractor—Any firm, corporation or individual contracting for the construction of any cavern or any part of any cavern.

   Drift—Any inclined way or opening in which haulage is effected by means of diesel haulage equipment or locomotives or conveyor haulage and which is used for the same purposes as a shaft or slope.

   Foreman—The person who is designated by the contractor, operator or superintendent to have immediate general supervision of all underground working and operations in a cavern.

   Owner or operator—The person, firm, or body corporate who is in legal possession of a cavern.

   Shaft—An opening through the strata which is or may be used for the purpose of ventilation, drainage or for hoisting men or materials in connection with cavern operations.

   Slope—Any inclined way or opening used for the same purposes as a shaft.

   Superintendent—The person who shall have, on behalf of the owner or operator, general supervision of one or more caverns.

   Timbers—All wood, steel or concrete material used in strengthening and supporting any part of a cavern.

   Working—All the excavated parts of a cavern, those abandoned and those actually under construction.