MDU Resources Group, Inc. (NYSE:MDU) will webcast its presentation to the financial community Thursday, Sept. 20, at the D. A. Davidson & Co. Engineering & Construction Conference. MDU Resources’ President and Chief Executive Officer Terry D. Hildestad and President and Chief Executive Officer of Knife River Corporation, William E. Schneider, will present a strategic and financial overview.

The webcast is scheduled to begin at 3:05 p.m. PDT and can be accessed at www.mdu.com. A replay will be available.

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, operating 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 mining, 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 of Investor Relations
    (701) 530-1057