Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
MACFARLANE CHARLES S
  2. Issuer Name and Ticker or Trading Symbol
OTTER TAIL CORP [OTTR]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President, Otter Tail Power Co
(Last)
(First)
(Middle)
215 S CASCADE ST
3. Date of Earliest Transaction (Month/Day/Year)
08/29/2007
(Street)

FERGUS FALLS, MN 56537-2801
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/29/2007   M   3,000 A $ 31.34 3,730 D  
Common Stock 08/29/2007   S   3,000 D $ 36.5 730 (1) D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Options (right to buy) $ 31.34 08/29/2007   M     3,000   (2) 04/08/2012 Common Stock 3,000 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MACFARLANE CHARLES S
215 S CASCADE ST
FERGUS FALLS, MN 56537-2801
      President, Otter Tail Power Co  

Signatures

 /s/ Charles S MacFarlane by Debra J Lill -POA   08/30/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) See below for other holdings: 1. Direct holding of 8,531.8771 shares of Common Stock held in the Dividend Reinvestment Plan. 2. Direct holding of 2,250 shares of Common Stock which is a grant of Restricted Stock. 3. Direct holding of 3,431 shares of Common Stock which no longer carries the restriction. 4. Direct holding of 5,065.8798 shares of Common Stock held in the Employee Stock Purchase Plan. 5. Indirect holding of 774.9786 shares of Common Stock held by ESOP. 6. Indirect holding of 162.4212 shares of Common Stock held by his children in custodian accounts. 7. 10,000 stock options with expiration date of 12/10/2011. 8. 8,000 stock options with expiration date of 4/14/2013. 9. 3,000 stock options with expiration date of 4/12/2014. 10. 3,000 stock options with expiration date of 4/11/2015. 11. 4,300 restricted stock units which vest 4/10/2010. 12. 3,450 restricted stock units which vest 4/8/2011.
(2) There is no specific "Exercisable Date" on these Stock Options.

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