Terry D. Hildestad, president and chief executive officer of MDU Resources Group, Inc. (NYSE:MDU), will present at the 2008 IPAA Oil & Gas Investment Symposium on Monday, April 7 at 3:20 p.m. EDT.

MDU Resources Group, Inc., a member of the S&P MidCap 400 index, provides value-added natural resource products and related services that are essential to energy and transportation infrastructure. The company operates in three core lines of business; energy, construction materials and utility resources. MDU Resources includes natural gas and oil production, natural gas pipelines and energy services, construction materials and contracting, construction services, and electric and natural gas utilities. For more information about MDU Resources, see the company's Web site at www.mdu.com or contact the Investor Relations Department at investor@mduresources.com.


Contact:
   Phyllis A. Rittenbach
   Director, Investor Relations
   (701) 530-1057