Otter Tail Corporation to Host Conference Call on First Quarter 2013 Financial Results

Otter Tail Corporation to Host Conference Call on First Quarter 2013 Financial
Results

FERGUS FALLS, Minn., April 29, 2013 (GLOBE NEWSWIRE) -- Otter Tail Corporation
will issue a news release announcing first quarter 2013 earnings results after
the market close on May 6, 2013, and host a live conference call and webcast
on May 7, 2013, at 10:00 a.m. CDT to discuss the company's financial and
operating performance.

The presentation will be posted on the company's website before the webcast.
To access the live webcast go to www.ottertail.com/presentations.cfm and
select "Webcast". Please allow extra time prior to the call to visit the site
and download any necessary software that may be needed to listen to the
Internet broadcast.An archived copy of the webcast will be available on our
website shortly following the call.

If you are interested in asking a question during the live broad cast, the
Dial-In Number is:877-312-8789.Please contact Loren Hanson at 218-739-8481
or lhanson@ottertail.com with any questions.

About Otter Tail Corporation: Otter Tail Corporation has interests in
diversified operations that include an electric utility, manufacturing and
infrastructure businesses. 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.

CONTACT: Loren Hanson
         218-739-8481
         lhanson@ottertail.com

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