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Upcoming Events:

7/15/2008 – Investor Conference Call / Webcast
9:00 AM MT / 11:00 AM ET
Topic: Update: IPP Divestiture and Aquila Acquisition
Presentation details:

• Click here to view or download a copy of the presentation.

Conference call details:

• A replay of the conference call will be available through 7/22/2008 by dialing (800) 475-6701 (USA) or (320) 365-3844 (international). The access code is 953838.

Click Here to view the 2007 10-K
Click Here to view the 2006 10-K

Jason Ketchum, Director of Investor Relations
Phone: (605) 721-2765
jason.ketchum@blackhillscorp.com