X0202 4 2007-04-09 0 0000075129 OTTER TAIL CORP OTTR 0001191498 LIEBE ARVID R 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 3,125.469 shares of Common Stock held in the Dividend Reinvestment Plan. 2. Indirect holing of 3,094.5950 shares of Common Stock held by an IRA. 3. 1,468.0390 stock units with no specific expiration date. 4. 2,000 stock options with expiration date of 4/8/2011. /s/ Arvid R Liebe by Debra J Lill -POA 2007-04-11