X0202 4 2005-09-30 0 0000075129 OTTER TAIL CORP OTTR 0001191499 NELSON KENNETH L 215 S CASCADE ST FERGUS FALLS MN 56537-2801 1 0 0 0 Common Stock 2005-09-30 4 A 0 412 30.88 A 14966 D Shares of Common Stock acquired under the 1999 Stock Incentive Plan at fair market value as part of the Compensation Program for Outside Directors. 14,554 shares of this total are held in "street name" through Merrill Lynch. See below for other holdings: 1. Direct holding of 1,065.6031 shares of Common Stock held in the Dividend Reinvestment Plan. 2. Direct holding of 3,100 shares of Common Stock which is a grant of Restricted Stock. 3. 2,000 stock options with expiration date of 4/9/2010. 4. 2,000 stock options with expiration date of 4/8/2011. /s/ Kenneth L Nelson by Debra J Lill -POA 2005-10-03