Helena Corporate Office

3020 Bozeman Ave. (Map | Driving Directions)
Helena, MT 59601
Phone: (406) 443-4150
Fax: (406) 443-4155

Mike Wignot, P.E., President
Bill Thompson, Vice President, Sciences Manager
Michael Oelrich, P.E., Engineering Manager
Robert Anderson, Principal Hydrogeologist
Marta Jourdonnais, Accounting Administrator
John Dayton, Information Systems Administrator

Billings Office

5825 Lazy Lane (Map | Driving Directions)
Billings, MT 59106
Phone: (406) 656-1172
Fax: (406) 656-8912

Al Hilty, P.G., Principal Hydrogeologist, Manager

Missoula Office

667 East Beckwith (Map | Driving Directions)
Missoula, MT 59801
Phone: (406) 721-8243
Fax: (406) 542-2619

Doug Parker, Executive Vice-President, Principal Soil Scientist/Hydrogeologist

Colstrip Office

P.O. Box 2136
Colstrip, MT 59323
Phone: (406) 748-5002

Lisa Criswell, Chemist