DELOITTE & TOUCHE LLP _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 3900 US Bancorp Tower Telephone: (503) 222-1341 111 SW Fifth Avenue Facsimile: (503) 224-2172 Portland, OR 97204-3698 EXHIBIT 23A INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of Northwest Natural Gas Company on Form S-8 of our report dated February 22, 1995, appearing in the Annual Report on Form 10-K of Northwest Natural Gas Company for the year ended December 31, 1994. DELOITTE & TOUCHE LLP - ------------------------------ DELOITTE & TOUCHE LLP October 20, 1995