(1) Permanent impoundments meeting the requirements of ARM 17.24.642 may be retained in mined and reclaimed areas, provided all highwalls are eliminated by grading to appropriate contours and the provisions for postmining land use and protection of the hydrologic balance are met.   No impoundments may be constructed on top of areas in which excess materials are deposited pursuant to the provisions of ARM 17.24.520.

History: 82-4-204, MCA; IMP, 82-4-232, MCA; NEW, 1980 MAR p. 725, Eff. 4/1/80; AMD, 1989 MAR p. 30, Eff. 1/13/89; TRANS, from DSL, 1996 MAR p. 3042.