In mining law. A lateral entrance or passage lnto a mine; tbe opening by which a mine is entered, or by which water and ores are carried away; a horizontal excavation in and along' a lode. Electro-Magnetic M. & D. Co. v. Van Auken, 9 Colo. 204, 11 Pac. 80 ; Gray v. Truby, 6 Colo. 278