Ownership Submission
FORM 5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Form 3 Holdings Reported
Form 4 Transactions Reported
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

ANNUAL 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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1. Name and Address of Reporting Person *
DODSON MARK S
 2. Issuer Name and Ticker or Trading Symbol
NORTHWEST NATURAL GAS CO [NWN] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)

220 NW SECOND AVENUE		 3. Statement for Issuer's Fiscal Year Ended (Month/Day/Year)
12/31/2009
(Street)


PORTLAND, OR 97209		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Reporting
(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 at end of Issuer's Fiscal Year
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Amount (A) or (D) Price
Common Stock 11/06/2009   G 351 D $ 0 11,894 I By Trust (1)
Common Stock 11/23/2009   G 590 D $ 0 11,304 I By Trust (1)
Common Stock 11/23/2009   G 355 D $ 0 10,949 I By Trust (1)
Common Stock 11/23/2009   G 240 D $ 0 10,709 I By Trust (1)
Common Stock             20,740.925 I See Footnote (2)
Common Stock             13,000 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 at End of Issuer's Fiscal Year
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
(A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option to Buy $ 34.29             (3) 12/31/2011 Common Stock
23,000
  23,000
D
 
Employee Stock Option to Buy $ 44.48             (4) 12/31/2011 Common Stock
23,000
  23,000
D
 
Employee Stock Option to Buy $ 43.29             (5) 12/31/2011 Common Stock
25,000
  25,000
D
 

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
DODSON MARK S
220 NW SECOND AVENUE
PORTLAND, OR 97209		   X      

Signatures

MardiLyn Saathoff, Attorney-in-Fact 02/16/2010
**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) These shares are held in a trust for the benefit of the reporting person's spouse. The filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
(2) Shares have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives.
(3) Option was granted for 23,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). Pursuant to the Plan, the option fully vested upon Mr. Dodson's retirement on December 31, 2008. The option expires on December 31, 2011.
(4) Option was granted for 23,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). Pursuant to the Plan, the option fully vested upon Mr. Dodson's retirement on December 31, 2008. The option expires on December 31, 2011.
(5) Option was granted for 25,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). Pursuant to the Plan, the option fully vested upon Mr. Dodson's retirement on December 31, 2008. The option expires on December 31, 2011.

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