310 Ind. Admin. Code 12-5-120Download PDFCurrent through May 29, 2024Section 310 IAC 12-5-120 - Underground mining; backfilling and grading; covering coal and acid and toxic forming materials (Repealed)310 IAC 12-5-120Repealed by Department of Natural Resources; filed Nov 20, 1984, 2:45 pm: 8 IR 330, eff Jun 1, 1985