MDU Resources Group, Inc.

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Our Vision and Mission Leading with Integrity The MDU Resources Foundation Corporate Governance

MDU Resources' Business Profile Construction Materials Construction Services Electric and Natural Gas Utilitiies Natural Gas and Oil Production Pipeline and Energy Services

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MDU Resources Group, Inc., (NYSE:MDU) is a multi-dimensional enterprise comprised of regulated and non-regulated businesses operating in domestic and international locations. A member of the S&P MidCap 400 index, the company provides value-added natural resource products and related services that are essential to energy and transportation infrastructure.

View the 2007 Annual Report and the 2008 Proxy Statement online!

Intermountain Gas Acquisition Webcast
Webcast: Wednesday, July 2, 2008 CDT

MDU Resources webcast the conference call regarding its Intermountain Gas Company acquisition announcement. Headquartered in Boise, Idaho, Intermountain Gas serves more than 300,000 customers in 74 communities in Idaho, including the Boise metropolitan area, Twin Falls, Sun Valley, Pocatello and Idaho Falls.

Cascade Natural Gas Corporation Shareholder Information