X0202 4 2007-06-29 0 0000075129 OTTER TAIL CORP OTTR 0001191500 SPIES GARY J 215 S CASCADE ST FERGUS FALLS MN 56537-2801 1 0 0 0 Restricted Stock Units 2007-06-29 4 A 0 564.0865 31.91 A Common Stock 564.0865 11330.1311 D These are Restricted Stock Units and have no conversion or exercise price at this time. There is no specific "Exercisable Date" on these Restricted Stock Units. There is no specific "Expiration Date" on these Restricted Stock Units. Restricted Stock Units of Common Stock acquired under the 1999 Stock Incentive Plan at fair market value as part of the Compensation Program for Outside Directors. See below for other holdings: 1. Direct holding of 1,040 shares of Common Stock, 1,000 of this total are held jointly with his wife in "street name" through Piper Jaffray. 2. Direct holding of 4,075.6855 shares of Common Stock held in the Dividend Reinvestment Plan. 3. Direct holding of 4,500 shares of Common Stock which is a grant of Restricted Stock. 4. Direct holding of 1,700 shares of Common Stock which no longer carries the restriction. 5. 2,000 stock options with expiration date of 4/8/2011. /s/ Gary J Spies by Debra J Lill -POA 2007-07-03