X0202 4 2005-04-11 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 2005-04-11 4 A 0 1300 24.93 A 3100 D Shares of Common Stock acquired under the Corporation's Stock Incentive Plan, which is a grant of Restricted Stock. The 1,300 shares granted 4/11/05 have a grant price of $24.93 and vest at 25% yearly beginning 4/8/06. See below for other holdings: 1. Direct holding of 1,540.3644 shares held in the Dividend Reinvestment Plan. 2. Direct holding of 875 shares which no longer carries the restriction. 3. Indirect holding of 30.1299 shares held by his children in custodian accounts. 4. Indirect holding of 2,891.2960 shares held by an IRA. 5. 1,359.8877 stock units with no specific expiration date. 6. 2,000 stock options with expiration date of 4/8/2011. /s/ Arvid R Liebe by Debra J Lill -POA 2005-04-13