X0202 4 2005-08-15 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 2005-08-15 4 S 0 0.7732 28.39 D 1271.8009 D Common Stock 2005-08-23 4 S 0 1200 28.50 D 0 D These shares are held in the Dividend Reinvestment Plan. See below for other holdings: 1. See above transaction for the 1,271.8009 shares that are held in the Dividend Reinvestment Plan. 2. Direct holding of 3,100 shares which is a grant of restricted stock. 3. Indirect holding of 30.4426 shares held by his children in custodian accounts. 4. Indirect holding of 2,921.2800 shares held by IRA. 5. 1,373.7666 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 2005-08-24