U.S. Mining. [UP- 2.] A shaft made by working upwards.
1877. Raymond, Statist. Mines & Mining, 158. A drift … has been run through the … ground, and an upraise commenced.
1882. U.S. Rep. Prec. Met., 98. At the end of this [tunnel] they are pushing an upraise, finding the rock a little softer as they go up.
