MDU Resources Group, Inc. 1200 W. Century Ave. P.O. Box 5650 Bismarck, ND 58506-5650
Telephone: (701) 530-1000 (800) 437-8000
E-mail: For general information: webmaster@mduresources.com For investor relations information: investor@mduresources.com For media inquiries: media@mduresources.com