For surface mining activities within the proposed permit area to be conducted within 500 feet to a point of either an active or abandoned underground mine, the application shall describe the measures to be used to comply with § § 77.561—77.565 (relating to use of explosives).

Source

The provisions of this § 77.463 adopted March 16, 1990, effective March 17, 1990, 20 Pa.B. 1643.