DMI Industries Announces Expansion Projects for North Dakota and Oklahoma Facilities

Tue Jun 3, 2008 4:19pm EDT

* Reuters is not responsible for the content in this press release.

FARGO, N.D.--(Business Wire)--
DMI Industries, an Otter Tail company, announced today that it
will expand its facilities in West Fargo, North Dakota, and near
Tulsa, Oklahoma. The expansions will increase capacity by 40% at the
West Fargo plant and by 100% at the Oklahoma plant. Once completed,
DMI will be the largest wind tower manufacturer in North America.

   Stefan Nilsson, DMI president, said in a statement at the American
Wind Energy Association's WINDPOWER 2008 conference and exhibition,
"This announcement is well timed. Customer demand for our facilities
for 2009 and 2010 production is so strong that we need to expand to
continue to meet market demands."

   "With multiple locations, DMI is exceptionally well positioned in
the high-growth wind energy industry and we enjoy a reputation for
outstanding quality and reliability within the industry," added
Nilsson. "Our visits with customers at the conference reaffirmed their
confidence in our products."

   For the Oklahoma facility, this approval means an earlier than
anticipated activation of phase two of its strategic development plan
since acquiring the property less than one year ago. This news closely
follows the recent release of the facility's first tower shipment,
which took place in mid-May.

   In addition to increasing capacity, the expansion at West Fargo
will streamline the production process through improvements in layout
and productivity. It is the first phase of a strategic development
plan for this facility, responding to ever-growing customer demand.

   "Both facilities will begin their projects immediately," said
Nilsson. "They will be ready to accommodate 2009 and 2010 production
demands. Increasing their capacities also requires an investment of
approximately $30 million and the employment of an additional 350 or
more skilled workers. That's more good news for the communities of
these two facilities."

   "This investment shows Otter Tail Corporation's commitment to DMI
and the opportunity to participate in the growing renewable energy
industries," said Chuck Hoge, manufacturing platform vice president at
Otter Tail Corporation. "We are proud of DMI and its employees for
what they have accomplished and look forward to continued growth and
successes. In addition, as work begins on both these expansions, we
appreciate the ongoing support of the states and communities where the
plants are located."

   About DMI Industries:

   DMI is a heavy steel wind tower manufacturer with plants located
in North Dakota, Oklahoma and Ontario, Canada. The company also has
capabilities to produce equipment for a wide variety of industries,
including agricultural processing; ethanol production; oil and gas
extraction and processing; and water and waste water processing. For
more information, visit www.windtowers.com or www.dmiindustries.com.

   About Otter Tail Corporation:

   Otter Tail Corporation has interests in diversified operations
that include an electric utility, plastics, manufacturing, health
services, food ingredient processing, transportation and construction.
Otter Tail Corporation stock trades on the NASDAQ Global Select Market
under the symbol OTTR. The latest investor and corporate information
is available at www.ottertail.com. Corporate offices are located in
Fergus Falls, Minnesota, and Fargo, North Dakota.

   Forward-looking Statements:

   Except for historical information, all other information provided
in this presentation consists of "forward-looking statements" within
the meaning of the Private Securities Litigation Reform Act of 1995.
These "forward-looking statements" are subject to risks and
uncertainties which could cause actual results to differ materially
from those projected, anticipated, or implied. The most significant of
these risks and uncertainties are discussed or identified in Otter
Tail Corporation's public filings made with the Securities and
Exchange Commission. Otter Tail Corporation undertakes no obligation
to publicly update or revise any forward-looking statements.

   PHOTOS AVAILABLE UPON REQUEST

DMI Industries
Stefan Nilsson, 701-866-5506
President
stefan.nilsson@dmiindustries.com
or
DMI Industries
Belinda Forknell, 701-282-6959 x222
Public Relations
belinda.forknell@dmiindustries.com
or
Otter Tail Corporation
Amy Richardson, 701-451-3580
Communications Director
arichardson@ottertail.com

Copyright Business Wire 2008