Otter Tail Corporation Declares Quarterly Dividend

Otter Tail Corporation Declares Quarterly Dividend

FARGO, N.D., May 3, 2013 (GLOBE NEWSWIRE) -- Otter Tail Corporation
(Nasdaq:OTTR) announced today that the Board of Directors declared a quarterly
common dividend of $0.2975 cents per share, payable on June 10, 2013 to
shareholders of record on May 15, 2013. This represents the 298^th consecutive
quarter that dividends have been paid on common stock.

The corporation will issue a news release announcing first quarter 2013
financial results after the market close on May 6, 2013.

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: Investor Relations
         (800) 664-1259

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