X0202 4 2007-04-09 0 0000075129 OTTER TAIL CORP OTTR 0001191500 SPIES GARY J 215 S CASCADE ST FERGUS FALLS MN 56537-2801 1 0 0 0 Common Stock 2007-04-09 4 A 0 1900 35.045 A 4500 D Shares of Common Stock acquired under the Corporation's Stock Incentive Plan, which is a grant of Restricted Stock. The 1,900 shares granted 4/9/07 have a grant price of $35.045 and vest at 25% yearly commencing 4/8/08. See below for other holdings: 1. Direct holding of 1,040 shares of Common Stock with 1,000 shares of this total held in "street name" with Piper Jaffray. 2. Direct holding of 3,982.0297 shares of Common Stock held in the Dividend Reinvestment Plan. 3. Direct holding of 1,700 shares of Common Stock which no longer carries the restriction. 4. 10,766.0446 common stock units with no specific expiration date. 5. 2,000 stock options with expiration date of 4/8/2011. /s/ Gary J Spies by Debra J Lill -POA 2007-04-11