November 13, 2008

MDU Resources Declares Quarterly Dividend on Common Stock and Preferred Stock

The MDU Resources Group (NYSE: MDU) board of directors today declared quarterly dividends on the company's common stock and preferred stock.

The dividend for common stock is 15.5 cents per share, unchanged from the previous quarter. Dividends for preferred stock are:

-- $1.12-1/2 per share on 4.50 percent Series Preferred

-- $1.17-1/2 per share on 4.70 percent Series Preferred

-- $1.27-1/2 per share on 5.10 percent Series Preferred

The dividends are payable Jan. 1, 2009 to stockholders of record Dec. 11, 2008.

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 contracting, construction services, and electric and natural gas utilities. For more information about MDU Resources, see the company's Web site at