------------------------------ OMB APPROVAL ------------------------------ OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response.........0.5 ------------------------------ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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 |_| Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). (Print or Type Responses) ________________________________________________________________________________ 1. Name and Address of Reporting Person* Ugoretz Beth A. -------------------------------------------------------------------------------- (Last) (First) (Middle) 220 N.W. 2nd Avenue -------------------------------------------------------------------------------- (Street) Portland OR 97209 -------------------------------------------------------------------------------- (City) (State) (Zip) ________________________________________________________________________________ 2. Issuer Name and Ticker or Trading Symbol NORTHWEST NATURAL GAS COMPANY NWN ________________________________________________________________________________ 3. I.R.S. Identification Number of Reporting Person, if an entity (voluntary) ________________________________________________________________________________ 4. Statement for Month/Day/Year 4/15/03 ________________________________________________________________________________ 5. If Amendment, Date of Original (Month/Day/Year) ________________________________________________________________________________ 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) |_| Director |_| 10% Owner |X| Officer (give title below) |_| Other (specify below) Senior Vice President and General Counsel ________________________________________________________________________________ 7. Individual or Joint/Group Filing (Check Applicable line) |X| Form Filed by One Reporting Person |_| Form Filed by More than One Reporting Person ________________________________________________________________________________ ================================================================================ Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned ================================================================================

FORM 4 (continued) Table II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) ================================================================================

Explanation of Responses: Beth A. Ugoretz 4/15/03 --------------------------------------------- ----------------------- **Signature of Reporting Person Date By: /s/ C.J. Rue --------------------------------------------- *C.J. Rue, Attorney-in-Fact ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. Page 2

UGORETZ BETH A 4