NorthWestern Energy Boosts and Extends Corporate Revolving Credit Facility

SIOUX FALLS, S.D., June 30 /PRNewswire-FirstCall/ -- NorthWestern Corporation
d/b/a NorthWestern Energy (NYSE: NWE) today announced that it has amended and
restated its corporate revolving credit facility to increase the amount to
$250 million from the current $200 million and to extend the maturity date to
June 30, 2012 from the existing November 1, 2009.

"This amendment provides NorthWestern with the liquidity necessary to support
its growth plan," said Brian Bird, Chief Financial Officer and Treasurer.
"The fact that we obtained a three-year extension and increased the
availability of the existing facility in this difficult banking environment
demonstrates the company's strong financial profile."

The banks in the facility include Banc of America Securities LLC (Lead
Arranger), JPMorgan Chase Bank, N.A. (Syndication Agent), Union Bank N.A.
(Co-Documentation Agent) and U.S. Bank National Association (Co-Documentation
Agent), Deutsche Bank, UBS Loan Finance, Bank of Nova Scotia, KeyBank Nat'l
Assoc., and Credit Suisse.

About NorthWestern Energy
NorthWestern Energy provides electricity and natural gas in the Upper Midwest
and Northwest, serving approximately 656,000 customers in Montana, South
Dakota and Nebraska. More information on NorthWestern Energy is available on
the Company's Web site at www.northwesternenergy.com.

SOURCE NorthWestern Corporation

media, Claudia Rapkoch, +1-866-622-8081, claudia.rapkoch@northwestern.com; or
investors, Dan Rausch, +1-605-978-2902, daniel.rausch@northwestern.com, both
of NorthWestern Corporation