OTTER TAIL CORP
FORM 10-K (Annual Report)
Filed 02/26/10 for the Period Ending 12/31/09
Address 215 S CASCADE ST PO BOX 496 FERGUS FALLS, MN 56538-0496 Telephone 8664108780 CIK 0001466593 Symbol OTTR SIC Code 4911 - Electric Services Industry Electric Utilities Sector Utilities Fiscal Year 12/31
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SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One)