Rule 36.21.641A - CASING DEPTH(1) All wells shall be completely cased to the bottom of the usable drill hole and sealed in accordance with ARM 36.21.654.
Mont. Admin. r. 36.21.641A
NEW, 1986 MAR p. 1699, Eff. 10/17/86; AMD, 1997 MAR p. 65, Eff. 1/17/97.