Shirley Ball So. Rte. Box 206 Nashua, MT 59248 Phone 406-785-3722 Email Richard Opper, Director Dept. of Environmental Quality 1520 East Sixth Avenue P.O. Box 200901 Helena, MT 59620-0901 Phone 406-444-6815 Fax 406-444-4386 Email Montana joined the Coalition in September 1991.