X0202 4 2005-04-08 0 0000075129 OTTER TAIL CORP OTTR 0001191483 ERICKSON JOHN D 215 S CASCADE ST FERGUS FALLS MN 56537-2801 0 1 0 0 President & CEO Common Stock 2005-04-08 4 F 0 7516 25.10 D 26600 D Grants of Restricted Stock. On 4/8/2005, 7,516 shares were withheld by the Corporation to pay taxes due upon vesting of restricted stock, exempt pursuant to Rule 16b-3(e). 26,600 shares remain restricted. See below for other holdings: 1. Direct holding of 101.9948 shares held in the Dividend Reinvestment Plan. 2. Direct holding of 7,510.8159 shares held in the Employee Stock Purchase Plan. 3. Direct holding of 30,527 shares which no longer carries the restriction. 4. Indirect holding of 4,981.5303 shares held by ESOP. 5. 16,000 stock options with expiration date of 2/22/2009. 6. 25,000 stock options with expiration date of 4/9/2010. 7. 75,000 stock options with expiration date of 4/8/2011. /s/ John D Erickson by Debra J Lill -POA 2005-04-12