16 TAC § 12.332. Casing and Sealing of Drilled Holes: Temporary, DIVISION 2. PERMANENT PROGRAM PERFORMANCE STANDARDS--SURFACE MINING ACTIVITIES

Each exploration hole, other drill hole or borehole, well, and other exposed underground opening which has been identified in the approved permit application for use to return coal processing waste or water to underground workings, or to be used to monitor ground-water conditions, shall be temporarily sealed before use and protected during use by barricades, fences, or other protective devices approved by the Commission. These devices shall be periodically inspected and maintained in good operating condition by the person who conducts the surface mining activities.