EXHIBIT 1



                          Northwest Natural Gas Company

                                  $108,000,000

                           Medium-Term Notes, Series B


                             Distribution Agreement
                             ----------------------

                                             o, 2001


Merrill Lynch, Pierce, Fenner & Smith
  Incorporated
World Financial Center
North Tower
New York, New York  10281

UBS Warburg LLC
677 Washington Blvd.
Stamford, Connecticut 06901

Banc One Capital Markets, Inc.
1 Bank One Plaza
Chicago, Illinois  60670

U.S. Bancorp Piper Jaffray Inc.
111 SW Fifth Avenue, Suite 1900
Portland, Oregon 97204

Dear Sirs:

          Northwest Natural Gas Company, an Oregon corporation (the "Company"),
proposes to issue and sell from time-to-time not to exceed $108,000,000 of its
First Mortgage Bonds, designated Secured Medium-Term Notes, Series B (the
"Secured Notes"), and its Unsecured Medium-Term Notes, Series B (the "Unsecured
Notes", and, together with the Secured Notes, the "Securities"). The Secured
Notes will be issued under the Company's Mortgage and Deed of Trust, dated as of
July 1, 1946, to Bankers Trust Company (the "Mortgage Trustee" or the "Trustee")
and R.G. Page (Stanley Burg, successor), as trustees, as supplemented (such
Mortgage and Deed of Trust as supplemented being hereinafter referred to as the
"Mortgage" or the "Indenture"). The Unsecured Notes will be issued under an
indenture, dated as of June 1, 1991 (the "Note Indenture" or the "Indenture"),
between the Company and Bankers Trust Company, as trustee (the "Indenture
Trustee" or the "Trustee"). The Securities shall have the maturities, interest
rates, if any, redemption provisions and other terms set forth in the Prospectus
referred to below, as it may be amended or supplemented from time-to-time. The





Securities will be issued, and the terms thereof established, from time-to-time,
by the Company in accordance with the respective Indentures.

          The Company represents, warrants, covenants and agrees with each of
you and with each other person which shall become a party to this agreement
(individually, an "Agent", and collectively, the "Agents") and each Agent,
severally and not jointly, covenants and agrees with the Company as follows:

          1.   Representations and Warranties of the Company. The Company
               ---------------------------------------------
represents and warrants to each Agent that:

          (a)  The Company is a corporation duly organized and validly existing
     in good standing under the laws of the State of Oregon, and is qualified to
     do business and is in good standing as a foreign corporation in the State
     of Washington, with power (corporate and other) to own its properties and
     conduct its business as described in the Prospectus referred to below.

          (b)  An initial registration statement on Form S-3 (Registration No.
     333-64777) (the "Initial Registration Statement"), in respect of
     $100,000,000 aggregate principal amount of the Company's First Mortgage
     Bonds designated Secured Medium-Term Notes Series B, and Unsecured
     Medium-Term Notes Series B (of which $8,000,000 remain unsold on the date
     hereof) has been filed with the Securities and Exchange Commission (the
     "Commission") under the Securities Act of 1933, as amended (the "Act"), in
     the form heretofore delivered (excluding the exhibits thereto but including
     the documents incorporated by reference in the prospectus included therein)
     to such Agent, and such Initial Registration Statement in such form has
     been declared effective by the Commission and no stop order suspending its
     effectiveness has been issued and no proceeding for that purpose has been
     initiated or threatened by the Commission. A subsequent registration
     statement on Form S-3 (Registration No. 333-o) (the "Subsequent
     Registration Statement"), in respect of an additional $100,000,000
     aggregate principal amount of the Securities has been filed with the
     Commission under the Act, in the form heretofore delivered or to be
     delivered (excluding the exhibits thereto but including the documents
     incorporated by reference in the prospectus included therein) to such
     Agent, and such Subsequent Registration Statement in such form has been
     declared effective by the Commission and no stop order suspending its
     effectiveness has been issued and no proceeding for that purpose has been
     initiated or threatened by the Commission (any preliminary prospectus
     included in the Subsequent Registration Statement being hereinafter called
     a "Preliminary Prospectus"). The Initial Registration Statement and the
     Subsequent Registration Statement, including all exhibits thereto but
     excluding Forms T-1 and T-2, as amended at the time each became effective,
     are hereinafter called the "Registration Statement"; the combined
     prospectus included as a part of the Subsequent Registration Statement
     (including, if applicable, any prospectus supplement) relating to the
     Securities, in the form in which it most recently has been filed with the
     Commission on or prior to the date of this Agreement, is hereinafter called
     the "Prospectus"; any reference herein to any Preliminary Prospectus or the
     Prospectus shall be deemed to refer to and include the documents filed by
     the Company under the Securities Exchange Act of 1934, as amended (the
     "Exchange Act"), and incorporated therein by reference as of the date of


                                       2



     such Preliminary Prospectus or Prospectus; any reference to any amendment
     or supplement to any Preliminary Prospectus or Prospectus, including any
     supplement to the Prospectus that sets forth only the terms of a particular
     issue of the Securities (a "Pricing Supplement"), shall be deemed to refer
     to and include the documents filed by the Company under the Exchange Act
     and incorporated therein by reference as of the date of such amendment or
     Pricing Supplement; and any reference to the Prospectus as amended or
     supplemented shall be deemed to refer to and include the Prospectus as then
     amended or supplemented (including the applicable Pricing Supplement) in
     relation to a particular issue of Securities, in the form filed with the
     Commission pursuant to Rule 424(b) under the Act, including any documents
     filed by the Company under the Exchange Act and incorporated therein by
     reference as of the date of such amendment or supplement.

          (c)  The documents incorporated by reference in the Prospectus, when
     filed with the Commission or, if later, when they became effective,
     conformed in all material respects with the requirements of the Act or the
     Exchange Act, as applicable, and the applicable rules and regulations of
     the Commission thereunder; none of such documents when so filed or when
     such documents became effective, as the case may be, included an untrue
     statement of a material fact or omitted to state a material fact required
     to be stated therein or necessary to make the statements therein, in the
     light of the circumstances under which they were made, not misleading; any
     future documents so filed or incorporated by reference in the Prospectus,
     or any amendment or supplement thereto, when filed with the Commission or,
     if later, when effective, will conform in all material respects with the
     applicable requirements of the Act or the Exchange Act, as applicable, and
     the rules and regulations of the Commission thereunder, and when such
     documents are filed or become effective, as the case may be, they will not
     contain an untrue statement of a material fact or omit to state a material
     fact required to be stated therein or necessary to make the statements
     therein, in the light of the circumstances under which they were made, not
     misleading; provided, however, that the Company makes no representations or
                 --------  -------
     warranties as to information contained in or omitted from the Prospectus as
     amended or supplemented in reliance upon and in conformity with information
     furnished in writing to the Company by any Agent specifically for use
     therein;

          (d)  The Initial Registration Statement and the Subsequent
     Registration Statement when each became effective conformed, and the
     Prospectus conforms, and any amendment or supplement thereto will conform,
     in all material respects, with the provisions of the Act and the Trust
     Indenture Act of 1939, as amended (the "Trust Indenture Act"), and the
     rules and regulations of the Commission thereunder; and the Initial
     Registration Statement and the Subsequent Registration Statement when each
     became effective did not, the Prospectus does not (and on each of the dates
     referred to in clause (i) of Section 6 will not) and any amendment or
     supplement to the Prospectus, as of its date and on each of the dates
     referred to in clause (i) of Section 6, will not, contain an untrue
     statement of a material fact or omit to state a material fact required to
     be stated therein or necessary to make the statements therein not
     misleading; provided, however, that the Company makes no representations or
                 --------  -------
     warranties as to information contained in or omitted from any such document
     in reliance upon and in conformity with information furnished in writing to
     the Company by any Agent specifically for use therein;


                                       3



          (e)  Except as set forth in or contemplated by the Prospectus, since
     the date as of which information is given in the Prospectus (i) there has
     not been any material adverse change in the condition of the Company and
     its subsidiaries taken as a whole, financial or otherwise, (ii) there has
     not been any transaction entered into by the Company or any of its
     subsidiaries which is material to the Company and its subsidiaries taken as
     a whole, other than transactions in the ordinary course of business, and
     (iii) neither the Company nor any of its subsidiaries has incurred any
     contingent obligation which is material to the Company and its subsidiaries
     taken as a whole;

          (f)  The Securities have been duly authorized, and, when issued
     pursuant to their respective Indentures and delivered pursuant to this
     Agreement and any Terms Agreement (as defined in Section 3 hereof), will
     have been duly executed, authenticated, issued and delivered, will
     constitute valid and legally binding obligations of the Company,
     enforceable in accordance with their terms, except as their enforceability
     may be limited by laws and principles of equity relating to or affecting
     generally the enforcement of creditors' rights, including without
     limitation, bankruptcy and insolvency laws, and will be entitled to the
     benefits provided by their respective Indentures (which will be
     substantially in the form filed as exhibits to the Subsequent Registration
     Statement); the Indentures have been duly authorized and qualified under
     the Trust Indenture Act, constitute valid and legally binding instruments,
     enforceable in accordance with their terms, except as their enforceability
     may be limited by laws and principles of equity relating to or affecting
     generally the enforcement of creditors' rights, including without
     limitation, bankruptcy and insolvency laws; and the Indentures conform, and
     the Securities of each issue, when issued, will conform, in all material
     respects, to the descriptions thereof in the Prospectus as amended or
     supplemented with respect to such issue;

          (g)  The issue and sale of the Securities, the compliance by the
     Company with all of the provisions of the Securities, the Indentures, this
     Agreement and any Terms Agreement, and the consummation by the Company of
     the transactions herein and therein contemplated will not result in a
     breach or violation of any of the terms or provisions of, or constitute a
     default under, any indenture, mortgage, deed of trust, loan agreement or
     other agreement or instrument to which the Company is a party or by which
     the Company is bound or to which any of the property of the Company is
     subject, nor will such action result in any violation of the provisions of
     any statute or the Restated Articles of Incorporation, as amended, or the
     Bylaws, as amended, of the Company or any order, rule or regulation of any
     court or any regulatory authority or other governmental agency or body
     having jurisdiction over the Company or any of its properties; and no
     consent, approval, authorization, order, registration or qualification of
     or with any court or governmental agency or body is required for the
     solicitation of offers to purchase Securities and the issue and sale of the
     Securities or the consummation by the Company of the other transactions
     contemplated by the Indentures, this Agreement or any Terms Agreement,
     except such as have been obtained at or prior to the Commencement Date (as
     defined in Section 4 hereof), will have been obtained under the Act, the
     Trust Indenture Act and the public utility laws of the States of Oregon and
     Washington and such as may be required under state securities or Blue Sky
     laws in connection with the solicitation by such Agent of offers to
     purchase Securities from the Company and with purchases of Securities by


                                       4



     such Agent as principal, as the case may be, in each case in the manner
     contemplated hereby; and

          (h)  Other than as set forth or contemplated in the Prospectus, there
     are no legal or governmental proceedings pending to which the Company is a
     party or to which any property of the Company is subject, which, if
     determined adversely to the Company, would individually or in the aggregate
     have a material adverse effect on the consolidated financial position,
     stockholders' equity or consolidated results of operations of the Company,
     and, to the best of the Company's knowledge, no such proceedings are
     threatened.

          2.   Obligations of the Agents and the Company.
               -----------------------------------------

          (a)  Subject to the terms and conditions hereof and to the reservation
     by the Company of the right to sell Securities directly on its own behalf,
     the Company hereby (i) appoints each of Merrill Lynch, Pierce, Fenner
     & Smith Incorporated, UBS Warburg LLC, Banc One Capital Markets, Inc.
     and U.S. Bancorp Piper Jaffray Inc. as an agent of the Company for the
     purpose of soliciting and receiving offers to purchase Securities from
     the Company and (ii) reserves the right, from time to time, to appoint
     additional agents for the purpose of soliciting and receiving offers to
     purchase Securities from the Company; provided that each such additional
     agent shall be required to become a party to this Agreement and
     undertake the obligations of an Agent hereunder pursuant to an Additional
     Agent Appointment Agreement ("Additional Agent Appointment Agreement")
     substantially in the form of Exhibit 1 hereto.

          (b)  On the basis of the representations and warranties herein, and
     subject to the terms and conditions hereof, each of the Agents, as agent of
     the Company, severally and not jointly, agrees to use its reasonable best
     efforts to solicit and receive offers to purchase particular issues of the
     Securities from the Company upon the terms and conditions set forth in the
     Prospectus as amended or supplemented with respect thereto. Each Agent will
     promptly advise the Company by telephone or other appropriate means of all
     reasonable offers to purchase Securities, other than those rejected by such
     Agent. The Company shall not, without the consent of each Agent, which
     consent shall not unreasonably be withheld, solicit or accept offers to
     purchase, or sell, any debt securities with a maturity, at the time of
     original issuance, of from nine months to 30 years, except (i) pursuant to
     this Agreement, (ii) pursuant to a private placement not constituting a
     public offering under the Act, or (iii) in connection with a firm
     commitment underwriting pursuant to an underwriting agreement that does not
     provide for a continuous offering. However, the Company, subject to Section
     5(f) hereof, reserves the right to sell, and may solicit and accept offers
     to purchase, Securities directly on its own behalf, and, in the case of any
     such sale not resulting from a solicitation made by an Agent, no commission
     will be payable with respect to such sale.

          (c)  Procedural details relating to the issue and delivery of
     Securities, the solicitation of offers to purchase Securities and the
     payment therefor, unless an Agent and the Company shall otherwise agree,
     shall be as set forth in the Administrative Procedure attached hereto as
     Annex I (the "Administrative Procedure"). The provisions of the


                                       5



     Administrative Procedure shall apply to all transactions contemplated
     hereunder other than those made pursuant to a Terms Agreement. Each Agent
     and the Company shall perform the respective duties and obligations
     specifically provided to be performed by each of them in the Administrative
     Procedure. The Company will furnish to the Trustees a copy of the
     Administrative Procedure as from time to time in effect.

          (d)  The Company reserves the right, in its sole discretion, to
     instruct the Agents to suspend, at any time, for any period of time or
     permanently, the solicitation of offers to purchase the Securities. As soon
     as practicable, but in any event not later than one business day after
     receipt of notice from the Company, the Agents will suspend solicitation of
     offers to purchase Securities from the Company until such time as the
     Company has advised the Agents that such solicitation may be resumed.

          (e)  The Company agrees to pay each Agent a commission, at the time of
     settlement (each a "Settlement Date") of any sale of a Security by the
     Company as a result of a solicitation made by such Agent, in an amount
     equal to the following applicable percentage of the principal amount of
     such Security sold:

                                                        Commission
                                             (percentage of aggregate principal
         Range of Maturities                    amount of Securities sold)
         -------------------                  ---------------------------------
From 9 months to less than 1 year                         .125%
From 1 year to less than 18 months                        .150%
From 18 months to less than 2 years                       .200%
From 2 years to less than 3 years                         .250%
From 3 years to less than 4 years                         .350%
From 4 years to less than 5 years                         .450%
From 5 years to less than 6 years                         .500%
From 6 years to less than 7 years                         .550%
From 7 years to less than 10 years                        .600%
From 10 years to less than 15 years                       .625%
From 15 years to less than 20 years                       .675%
From 20 years to 30 years                                 .750%

          3.   Sales to Agents as Principal. Each sale of Securities to an
               ----------------------------
Agent, as principal, shall be made in accordance with the terms of this
Agreement and (unless the Company and such Agent shall otherwise agree) a
separate agreement (each a "Terms Agreement"), which will provide for the sale
of such Securities to, and the purchase thereof by, such Agent, as principal. A
Terms Agreement may be either (i) a written agreement substantially in the form
of Annex II hereto, or (ii) an oral agreement between any Agent and the Company
confirmed in writing by such Agent. A Terms Agreement may also specify certain
provisions relating to the reoffering of such Securities by such Agent. Each
Terms Agreement shall specify the principal amount of Securities to be purchased
by an Agent pursuant thereto, the price to be paid to the Company for such
Securities, any provisions relating to the rights of, and defaults by, any


                                       6



underwriters acting together with such Agent in the reoffering of the
Securities, the time and date of delivery of and payment for such Securities
(each, a "Time of Delivery") and place of delivery of such Securities, and any
requirements for opinions of counsel, accountants' letters and officers'
certificates pursuant to Section 5 hereof. Each purchase of Securities, unless
otherwise agreed shall be at a discount equivalent to the commission payable to
an Agent, acting as agent, with respect to a sale of Securities of identical
maturity, as set forth in Section 2(e) hereof). The Agent may engage the
services of any other broker or dealer in connection with the resale of the
Securities purchased as principal and may allow any portion of the discount
received in connection with such purchase from the Company to be paid to such
brokers and dealers. The commitment of an Agent to purchase Securities as
principal, whether pursuant to a Terms Agreement or otherwise, shall be deemed
to have been made on the basis of the representations and warranties of the
Company herein contained and, to the extent not otherwise agreed upon in a Terms
Agreement or otherwise, shall be subject to the terms and conditions herein set
forth.

          4.   Commencement. At 11:00 a.m., New York City time, on the date of
               ------------
this Agreement or at such later date and time as may be agreed upon between the
Agents and the Company not later than the day prior to the earlier of the day on
which the solicitation of offers to purchase Securities is to begin or on which
any Terms Agreement shall be executed (such time and date being referred to
herein as the "Commencement Date"), the Agents shall be furnished at the offices
of Thelen Reid & Priest LLP, 40 West 57th Street, New York, New York:

          (a)  An opinion of Simpson Thacher & Bartlett, counsel to the Agents,
     dated the Commencement Date, with respect to such matters as such Agents
     may reasonably request, which opinion may rely, as to all matters governed
     by Oregon law, upon the opinion of Mark S. Dodson, Esq., General Counsel
     for the Company, referred to in Section 4(b) hereof and, as to all matters
     governed by Washington law, upon the opinion of Stoel Rives LLP referred to
     in Section 4(d) hereof;

          (b)  An opinion of Mark S. Dodson, Esq., dated the Commencement Date,
     in form and substance reasonably satisfactory to such Agents, to the effect
     set forth in Annex III, which opinion may rely, as to all matters governed
     by New York law, upon the opinion of Thelen Reid & Priest LLP referred to
     in Section 4(c) hereof and, as to certain matters governed by Washington
     law, upon the opinion of Stoel Rives LLP referred to in Section 4(d)
     hereof;

          (c)  An opinion of Thelen Reid & Priest LLP, dated the Commencement
     Date, in form and substance reasonably satisfactory to such Agents, to the
     effect set forth in Annex IV, which opinion may rely, as to all matters
     governed by Oregon law, upon the opinion of Mark S. Dodson, Esq., referred
     to in Section 4(b) hereof and, as to all matters governed by Washington
     law, upon the opinion of Stoel Rives LLP referred to in Section 4(d)
     hereof;

          (d)  An opinion of Stoel Rives LLP, dated the Commencement Date, in
     form and substance reasonably satisfactory to such Agents, to the effect
     set forth in Annex V.


                                       7



          (e)  A letter from PricewaterhouseCoopers LLP, the Company's
     independent accountants, dated the Commencement Date, in form and substance
     reasonably satisfactory to such Agents and subject to compliance with the
     requirements of Statements on Auditing Standards issued by the American
     Institute of Certified Public Accountants ("SAS"), to the effect set forth
     in Annex VI hereto; and

          (f)  A certificate of the President or any Vice President of the
     Company, dated the Commencement Date, in form reasonably satisfactory to
     such Agents, (i) as to the accuracy of the representations and warranties
     of the Company herein at and as of the Commencement Date, (ii) as to the
     performance by the Company in all material respects of all of its
     obligations hereunder to be performed at or prior to the Commencement Date,
     (iii) as to the matters set forth in Section 1(e) hereof, (iv) as to the
     absence of any stop order of the Commission suspending the effectiveness of
     the Registration Statement or any pending or contemplated proceedings for
     such purpose, (v) as to the full force and effect of the authorizing orders
     of the Oregon Public Utility Commission and the Washington Utilities and
     Transportation Commission referred to in Section 7(a) hereof, and (vi) as
     to such other matters as such Agents may reasonably request.

          5.   Covenants of the Company. The Company covenants and agrees with
               ------------------------
each Agent:

          (a) (i) To make no amendment or supplement to the Registration
     Statement or the Prospectus (other than a Pricing Supplement) (A) prior to
     the Commencement Date, which any Agent shall reasonably disapprove by
     notice to the Company promptly after receipt of the proposed form thereof
     or (B) after the date of any agreement by such Agent, pursuant to a Terms
     Agreement or otherwise, to purchase Securities as principal and prior to
     the related Time of Delivery which such Agent shall reasonably disapprove
     by notice to the Company promptly after receipt of the proposed form
     thereof; (ii) to prepare, with respect to each particular issue of
     Securities to be sold through or to such Agent pursuant to this Agreement,
     a Terms Agreement or otherwise, a Pricing Supplement with respect to such
     Securities in a form reasonably satisfactory to such Agent and to file such
     Pricing Supplement in accordance with Rule 424(b) under the Act; (iii) to
     make no amendment or supplement to the Registration Statement or
     Prospectus, other than a Pricing Supplement, without affording such Agent a
     reasonable opportunity for review thereof and comment thereon; (iv) to
     timely file all reports and any definitive proxy or information statements
     required to be filed by the Company with the Commission pursuant to Section
     13(a), 13(c), 14 or 15(d) of the Exchange Act for so long as the delivery
     of a prospectus is required in connection with the offering or sale of the
     Securities, and during such same period to advise such Agent, promptly
     after the Company receives notice thereof, of the time when any amendment
     to the Registration Statement has been filed or has become effective or any
     supplement to the Prospectus or any amended Prospectus (other than any
     Pricing Supplement that relates to Securities not purchased through or by
     such Agent) has been filed with the Commission, of the issuance by the
     Commission of any stop order or of any order preventing or suspending the
     use of any prospectus relating to the Securities, of the suspension of the
     qualification of the Securities for offering or sale in any jurisdiction,
     of the initiation or threatening of any proceeding for any such purpose, or
     of any request by the Commission for the amendment or supplement of the


                                       8



     Registration Statement or Prospectus or for additional information; (v) to
     promptly make every reasonable effort to comply with all requests of the
     Commission for additional information; and (vi) in the event of the
     issuance of any such stop order or of any such order preventing or
     suspending the use of any such prospectus or suspending any such
     qualification, to use its best efforts to obtain its withdrawal;

          (b)  From time-to-time, to take such action as such Agent reasonably
     may request to qualify the Securities for offering and sale under the
     securities laws of such jurisdictions as may be approved by the Company and
     to comply with such laws so as to permit the continuance of sales and
     dealings therein for as long as may be necessary to complete the
     distribution or sale of the Securities; provided, however, that in
                                             --------  -------
     connection therewith the Company shall not be required to qualify as a
     foreign corporation or to file a general consent to service of process in
     any jurisdiction, or to comply with any other requirement reasonably deemed
     by the Company to be unduly burdensome; provided, further, that the
                                             --------  -------
     provisions of this subsection (b) shall not apply so long as the Securities
     are "covered securities" within the meaning of Section 18 of the Act and
     any rules and regulations thereunder;

          (c)  To furnish such Agent with copies of the Registration Statement,
     each amendment thereto, the Prospectus and each amendment or supplement
     thereto, other than any Pricing Supplement (except as provided in the
     Administrative Procedure), in the form in which it is filed with the
     Commission pursuant to Rule 424(b) under the Act, and with copies of the
     documents incorporated by reference therein (other than exhibits
     incorporated by reference in the Registration Statement), each in such
     quantities as such Agent may reasonably request from time-to-time; and, if
     the delivery of a prospectus is required at any time in connection with the
     offering or sale of the Securities to or through an Agent pursuant to this
     Agreement and if, at such time, any event shall have occurred as a result
     of which the Prospectus as then amended or supplemented would include an
     untrue statement of a material fact or omit to state any material fact
     necessary in order to make the statements therein, in the light of the
     circumstances under which they were made, not misleading, or, if for any
     other reason it shall be necessary during such period to amend or
     supplement the Prospectus or to file under the Exchange Act any document
     incorporated by reference in the Prospectus in order to comply with the
     Act, the Exchange Act or the Trust Indenture Act, to notify such Agent and
     request such Agent, in its capacity as agent of the Company, to suspend
     solicitation of offers to purchase Securities from the Company (and, if so
     notified, such Agent shall cease such solicitations as soon as practicable,
     but in any event not later than one business day later); and if the Company
     shall decide to amend or supplement the Registration Statement or the
     Prospectus, to so advise such Agent promptly by telephone (confirmed in
     writing) and to prepare and cause to be filed promptly with the Commission
     an amendment or supplement to the Registration Statement or the Prospectus
     or to file any document incorporated by reference in the Prospectus that
     will correct such statement or omission or effect such compliance; provided
                                                                        --------
     that, (i) should such event relate solely to activities of any Agent
     ----
     (except any termination of any Agent's services hereunder), such Agent
     shall assume the expense of preparing and furnishing any such amendment or
     supplement; (ii) if, during such period, such Agent shall continue to own


                                       9



     Securities purchased from the Company as principal or such Agent otherwise
     shall be required to deliver a prospectus in respect of transactions in the
     Securities, the Company shall promptly prepare and file with the Commission
     such an amendment or supplement; and (iii) if such Agent shall be required
     to deliver a prospectus in connection with sales of any Securities
     purchased by it as principal at any time nine months or more after the date
     of such purchase and (A) there shall be, as a result of such purchase, no
     Securities remaining to be sold under the Registration Statement or (B) the
     Company, pursuant to Section 2(d) hereof, shall have instructed the Agents,
     during such nine month period, to suspend permanently the solicitation of
     offers to purchase the Securities, such Agent shall assume the expense of
     preparing and furnishing any such amendment or supplement in connection
     with the sales of any Securities purchased by such Agent as principal. (For
     the purposes of this Section 5(c), the Company shall be entitled to assume
     that a Prospectus shall no longer be required to be delivered under the Act
     from and after the date six months from the date of the purchase by an
     Agent as principal of the particular issuance of Securities to which it
     relates, unless it shall have received notice from such Agent to the
     contrary);

          (d)  To make generally available to its security holders as soon as
     practicable, but in any event not later than eighteen months after (i) the
     effective date of the Registration Statement, (ii) the effective date of
     each post-effective amendment to the Registration Statement, and (iii) the
     date of each filing by the Company with the Commission of an Annual Report
     on Form 10-K that is incorporated by reference in the Registration
     Statement, an earning statement of the Company and its subsidiaries (which
     need not be audited) in accordance with Section 11(a) of the Act and the
     rules and regulations of the Commission thereunder (including, at the
     option of the Company, Rule 158);

          (e)  For the period ending five years from the date any Securities are
     sold by the Company pursuant to an offer solicited by such Agent under this
     Agreement, to furnish to such Agent copies of all reports or other
     communications (financial or other) furnished to stockholders, and deliver
     to such Agent (i) as soon as they are available, copies of any reports and
     financial statements furnished to or filed with the Commission pursuant to
     Section 13(a), 13(c), 14 or 15(d) of the Exchange Act, (ii) copies of all
     registration statements filed under the Act (other than those in respect of
     shareholder or employee plans), and (iii) such additional information
     concerning the business and financial condition of the Company as such
     Agent may from time to time reasonably request (such financial statements
     to be on a consolidated basis to the extent the accounts of the Company and
     its subsidiaries are consolidated in reports furnished to its stockholders
     generally or to the Commission);

          (f)  That, from the date of any Terms Agreement or other agreement
     with such Agent to purchase Securities as principal and to and including
     the earlier of (i) the termination of the trading restrictions for the
     Securities purchased thereunder, as notified to the Company by such Agent
     and (ii) the related Time of Delivery, the Company, without the prior
     written consent of such Agent, will not offer, sell, contract to sell or
     otherwise dispose of any debt securities of the Company in a public


                                       10



     offering which both have a maturity of from nine months to 30 years and are
     substantially similar to the Securities;

          (g)  That each acceptance by the Company of an offer to purchase
     Securities procured by such Agent, as agent, and each agreement by the
     Company, pursuant to a Terms Agreement or otherwise, to sell Securities to
     such Agent, as principal, shall be deemed to be an affirmation to such
     Agent that the representations and warranties of the Company contained in
     or made pursuant to this Agreement are true and correct as of the date of
     such acceptance or agreement, as the case may be, as though made as of such
     date, and an undertaking that such representations and warranties will be
     true and correct as of the Settlement Date for the Securities relating to
     such acceptance or as of the Time of Delivery relating to such sale, as the
     case may be, as though made as of such date (except that such
     representations and warranties shall be deemed to relate to the
     Registration Statement and the Prospectus as amended and supplemented
     relating to such Securities);

          (h)  That, reasonably in advance of (i) each date as of which an Agent
     reasonably requests an opinion or opinions of Simpson Thacher & Bartlett,
     counsel to the Agents, or other counsel to the Agents reasonably
     satisfactory to the Company, or (ii) each time that the Company sells
     Securities to such Agent as principal pursuant to a Terms Agreement or
     other agreement and such Agent requests an opinion or opinions by Simpson
     Thacher & Bartlett, counsel to the Agents, or other counsel to the Agents
     reasonably satisfactory to the Company, the Company shall furnish to such
     counsel such papers and information as they may reasonably request to
     enable them to furnish to such Agent a letter in form reasonably
     satisfactory to such Agent, to the effect that such Agent may rely on the
     opinion of such counsel referred to in Section 4(a) hereof, to the same
     extent as though it was dated the date of such letter (except that the
     statements in such opinion shall be deemed to relate to the Registration
     Statement and the Prospectus as amended and supplemented to the date of
     such letter), or in lieu of such a letter, an opinion of the same tenor as
     the opinion of such counsel referred to in Section 4(a) hereof, but
     modified to relate to the Registration Statement and the Prospectus as
     amended and supplemented to such date;

          (i)  That each time that (x) the Registration Statement or the
     Prospectus shall be amended or supplemented (other than by a Pricing
     Supplement or by an amendment or supplement providing solely for a change
     in the interest rates of the Securities or similar changes and, unless the
     Agents shall otherwise specify, other than by an amendment or supplement
     which relates exclusively to an offering of debt securities other than the
     Securities), (y) a document incorporated by reference in the Prospectus as
     amended or supplemented (other than a Current Report on Form 8-K, unless
     the Agents shall otherwise specify) shall be filed under the Act or
     Exchange Act (unless waived by the Agents), and (z) the Company sells
     Securities to such Agent, as principal, pursuant to a Terms Agreement or
     other agreement and such Terms Agreement or other agreement specifies the
     delivery of an opinion, letter or certificate under this Section 5(i) as a
     condition to the purchase of Securities pursuant to such Terms Agreement or
     other agreement, the Company shall furnish or cause to be furnished to such
     Agent:


                                       11



          (i)  a letter from Mark S. Dodson, Esq., General Counsel for the
               Company, or his successor, dated the date of such amendment,
               supplement, incorporation or Time of Delivery relating to such
               sale, as the case may be, in form reasonably satisfactory to such
               Agent, to the effect that such Agent may rely on the opinion of
               such counsel referred to in Section 4(b) hereof to the same
               extent as though it were dated the date of such letter (except
               that the statements in such opinion shall be deemed to relate to
               the Registration Statement and the Prospectus as amended and
               supplemented to the date of such letter, excluding, in the case
               of the statements in the paragraph next following paragraph 14 of
               such opinion, all documents filed by the Company under the
               Exchange Act and incorporated by reference into the Registration
               Statement and Prospectus during or prior to the fiscal year which
               is the subject of the Company's most recent Annual Report on Form
               10-K) or, in lieu of such a letter, an opinion of the same tenor
               as the opinion of such counsel referred to in Section 4(b)
               hereof, but modified to relate to the Registration Statement and
               the Prospectus as so amended and supplemented to such date;

          (ii) a letter of Thelen Reid & Priest LLP, New York, New York, counsel
               for the Company, or other counsel for the Company reasonably
               satisfactory to such Agent, dated the date of such amendment,
               supplement, incorporation or Time of Delivery relating to such
               sale, as the case may be, in form reasonably satisfactory to such
               Agent, to the effect that such Agent may rely on the opinion of
               such counsel referred to in Section 4(c) hereof to the same
               extent as though it were dated the date of such letter (except
               that the statements in such opinion shall be deemed to relate to
               the Registration Statement and the Prospectus as amended and
               supplemented to the date of such letter, excluding, in the case
               of the statements in the paragraph next following paragraph 10 of
               such opinion, all documents filed by the Company under the
               Exchange Act and incorporated by reference into the Registration
               Statement and the Prospectus during or prior to the fiscal year
               which is the subject of the Company's most recent Annual Report
               on Form 10-K) or, in lieu of such letter, an opinion of the same
               tenor as the opinion of such counsel referred to in Section 4(c)
               hereof, but modified to relate to the Registration Statement and
               the Prospectus as so amended and supplemented to such date;

          (iii) a letter of Stoel Rives LLP, Portland, Oregon, special
               Washington counsel for the Company, or other special Washington
               counsel for the Company reasonably satisfactory to such Agent,
               dated the date of such amendment, supplement, incorporation or
               Time of Delivery relating to such sale, as the case may be, in
               form reasonably satisfactory to such Agent, to the effect that
               such Agent may rely on the opinion of such counsel referred to in
               Section 4(d) hereof to the same extent as though it were dated
               the date of such letter or, in lieu of such letter, an opinion of
               the same tenor as the opinion of such counsel referred to in
               Section 4(d) hereof; and


                                       12



          (iv) a certificate executed by the President or any Vice President of
               the Company, dated the date of such supplement, amendment,
               incorporation or Time of Delivery relating to such sale, as the
               case may be, in such form as shall be reasonably satisfactory to
               such Agent, to the effect that the statements contained in the
               certificate referred to in Section 4(f) hereof are true and
               correct at such date as though made as of such date (except that
               such statements shall be deemed to relate to the Registration
               Statement and the Prospectus as amended and supplemented to such
               date) or, in lieu of such certificate, a certificate of the same
               tenor as the certificate referred to in Section 4(f) hereof, but
               modified to relate to the Registration Statement and the
               Prospectus as amended and supplemented to such date; and

          (j)  That each time that (x) the Registration Statement or the
     Prospectus shall be amended or supplemented to include additional financial
     information (unless waived by the Agents), and (y) the Company sells
     Securities to such Agent as principal pursuant to a Terms Agreement or
     other agreement and such Terms Agreement or other agreement specifies the
     delivery of a letter under this Section 5(j) as a condition to the purchase
     of Securities pursuant to such Terms Agreement or other agreement, and
     subject to compliance with the requirements of SAS issued by the American
     Institute of Certified Public Accountants, the Company shall furnish or
     cause to be furnished to such Agent a letter of PricewaterhouseCoopers LLP
     or other independent accountants for the Company reasonably satisfactory to
     the Agent, dated the date of such amendment, supplement, incorporation or
     Time of Delivery relating to such sale, as the case may be, in form
     reasonably satisfactory to such Agent, to the effect that such Agent may
     rely upon the letter of such accountants referred to in Section 4(e) hereof
     to the same extent as though it were dated the date of such subsequent
     letter (except the statements in such former letter shall be deemed to
     relate to the financial statements included or incorporated in the
     Registration Statement and Prospectus as amended and supplemented to the
     date of such latter letter), or, in lieu of such latter letter, a letter of
     the same tenor as the letter referred to in Section 4(e) hereof, but
     modified to relate to the Registration Statement and the Prospectus as
     amended or supplemented to the date of such letter, with such changes as
     may be necessary to reflect changes in the financial statements and other
     information derived from the accounting records of the Company, to the
     extent such financial statements and other information are available as of
     a date not more than five business days prior to the date of such letter;

          (k)  To offer to any person who has agreed to purchase Securities as
     the result of an offer to purchase solicited by such Agent, as agent, the
     right to refuse to purchase and pay for such Securities if, at the
     Settlement Date for such Securities, any condition set forth in Section 6
     hereof shall not have been satisfied (it being understood that the judgment
     of such person with respect to the impracticability or inadvisability of
     such purchase of Securities shall be substituted, for purposes of this
     Section 5(k), for the judgment of such Agent with respect thereto); and

          (l)  To pay or cause to be paid the following: (i) the fees and
     expenses of the Company's counsel and accountants in connection with the
     registration of the Securities under the Act and all other expenses in


                                       13



     connection with the preparation, printing and filing of the Registration
     Statement, any Preliminary Prospectus, the Prospectus and any Pricing
     Supplements and all other amendments and supplements thereto and the
     mailing and delivering of copies thereof to such Agent; (ii) the fees and
     expenses of counsel for the Agents in connection with the establishment of
     the program contemplated hereby, any opinions to be rendered by such
     counsel hereunder and the transactions contemplated hereunder; (iii) the
     cost of preparing this Agreement, any Terms Agreement and any other
     documents approved by the Company in connection with the offering,
     purchase, sale and delivery of the Securities; (iv) the fees, not to exceed
     $5,000, and expenses of counsel for the Agents in connection with the
     qualification of the Securities for offering and sale under state
     securities laws as provided in Section 5(b) hereof and the preparation of
     any blue sky and legal investment memoranda; (v) any fees charged by
     securities rating services for rating the Securities; (vi) any filing fees
     incident to any required review by the New York Stock Exchange of the terms
     of the sale of the Securities; (vii) the cost of preparing the Securities;
     (viii) the fees and expenses of the Trustees and any agent of any Trustee
     and any transfer or paying agent of the Company and the fees and
     disbursements of counsel for any Trustee or any such agent in connection
     with any Indenture and the Securities; (ix) any advertising expenses
     connected with the solicitation of offers to purchase and the sale of
     Securities so long as such advertising expenses have been approved by the
     Company; and (x) all other costs and expenses incident to the performance
     of the Company's obligations hereunder which are not otherwise specifically
     provided for in this Section; provided, however, that, except as provided
     in Sections 8 and 9 hereof, such Agent shall pay all other expenses it
     incurs, including any expenses that may be incurred by it or for its
     account pursuant to the proviso of Section 5(c) hereof.

          (m)  To advise each Agent, promptly after the Company receives notice
     thereof, of the downgrading, or the issuance of a notice of any intended or
     potential downgrading, of the ratings of the Securities by either Moody's
     Investors Service or Standard & Poor's Corporation.

          6.   Conditions to Agents' Obligations. The obligation of an Agent, as
               ---------------------------------
agent of the Company, at any time (each a "Solicitation Time"), to solicit
offers to purchase the Securities and the obligation of an Agent to purchase
Securities as principal, pursuant to a Terms Agreement or otherwise, shall be
subject, in such Agent's discretion, to the conditions that: (i) all of the
representations and warranties of the Company herein (and, in the case of an
obligation of an Agent under a Terms Agreement or other agreement with an Agent
to purchase Securities as principal, in or incorporated in such agreement by
reference) were true and correct (A) on the Commencement Date; (B) each time
that the Registration Statement or the Prospectus shall be amended or
supplemented, (C) each time a document incorporated by reference in the
Prospectus as amended or supplemented shall be filed by the Company under the
Act or Exchange Act, (D) at the date of each acceptance by the Company of an
offer to purchase Securities procured by such Agent, as agent, and each
agreement by the Company, pursuant to a Terms Agreement or otherwise, to sell
Securities to an Agent, as principal, (E) at each Settlement Date, and (F) at
each Time of Delivery of Securities so to be purchased by such Agent, as
principal, as the case may be, (ii) prior to such Solicitation Time or such Time
of Delivery, as the case may be, the Company shall have performed all of its
obligations hereunder theretofore to be performed, (iii) all requests for


                                       14



additional information on the part of the Commission shall have been complied
with to the reasonable satisfaction of such Agent, (iv) there shall be in full
force and effect orders of the Oregon Public Utility Commission and the
Washington Utilities and Transportation Commission which are acceptable to the
Agents and which permit the issuance and sale of the Securities substantially in
accordance with the terms and conditions of this Agreement, (v) no stop order
suspending the effectiveness of the Registration Statement shall have been
issued and no proceedings for that purpose shall be pending before, or to the
knowledge of the Company contemplated by, the Commission, and (vi) there shall
not have occurred: (A) a suspension or material limitation of trading in
securities generally on the New York Stock Exchange or in any securities of the
Company on the New York Stock Exchange or any relevant exchange; (B) a general
moratorium on commercial banking activities in New York declared by either
Federal or New York State authorities; (C) an engagement by the United States in
hostilities or any escalation of hostilities, the effect of which, in the
judgment of such Agent, makes it impracticable or inadvisable to proceed with
the solicitation of offers to purchase Securities or the purchase of Securities
from the Company as principal on the terms and in the manner contemplated by
this Agreement and, if applicable, any Terms Agreement or other agreement; or
(D) any downgrading, or any notice shall have been given of any intended or
potential downgrading, of the Securities by either Moody's Investors Service or
Standard & Poor's Corporation. In addition to the foregoing, the obligation of
an Agent to purchase Securities as principal, pursuant to a Terms Agreement or
other agreement, shall be subject, in such Agent's discretion, to the further
condition that there shall not have been, since the date of such Terms Agreement
or other agreement or since the respective dates as of which information is
given in the Registration Statement, any material adverse change in the
condition, financial or otherwise, or in the earnings, business affairs or
business prospects of the Company and its subsidiaries considered as one
enterprise, whether or not arising in the ordinary course of business.

          7.   Conditions to Company's Obligations.
               -----------------------------------

          (a)  The obligation of the Company to sell and deliver any Security
     pursuant hereto, to a Terms Agreement or otherwise shall be subject to the
     condition that, after the acceptance by the Company of an offer to purchase
     such Security procured by an Agent, as agent, or the agreement by the
     Company, pursuant to a Terms Agreement or otherwise, to sell such Security
     to an Agent, as principal, and prior to the Time of Delivery or the
     Settlement Date, as the case may be, with respect to such purchase or sale,
     neither the Oregon Public Utility Commission nor the Washington Utilities
     and Transportation Commission shall have issued an order revoking its then
     existing order permitting the issuance and sale of the Securities through
     each Agent, as agent, on the terms set forth herein or to each Agent, as
     principal, pursuant to a Terms Agreement or other agreement.

          (b)  If the condition specified in Section 7(a) hereof shall not have
     been fulfilled, the obligation of the Company to sell Securities hereunder
     or under a Terms Agreement or other agreement may be terminated by the
     Company; and neither the Company nor any Agent shall have any liability to
     the other, except for (i) the obligation of the Company to pay certain
     expenses to the extent provided for in Section 5(l) hereof, (ii) the
     obligation of the Company to pay commissions and hold the Agents harmless
     as provided in Section 9 hereof (and, for purposes of said Section 9, such


                                       15



     a failure of such condition to be fulfilled shall be considered a default
     by the Company on its obligation to deliver such Securities), and (iii) any
     liability under Section 8 hereof.

          8.   Indemnification.
               ---------------

          (a)  The Company will indemnify and hold harmless each Agent against
     any losses, claims, damages or liabilities, joint or several, to which such
     Agent may become subject, under the Act or otherwise, insofar as such
     losses, claims, damages or liabilities or actions in respect thereof arise
     out of or are based upon an untrue statement or alleged untrue statement of
     a material fact contained in the Registration Statement, any Preliminary
     Prospectus, the Prospectus or the Prospectus as amended or supplemented, or
     arise out of or are based upon the omission or alleged omission to state
     therein a material fact required to be stated therein or necessary to make
     the statements therein not misleading, and will reimburse such Agent for
     any legal or other expenses reasonably incurred by it, as incurred, in
     connection with investigating or defending any such loss, claim, damage,
     liability or action; provided, however, that the Company shall not be
                          --------  -------
     liable in any such case to the extent that any such loss, claim, damage or
     liability or action in respect thereof arises out of or is based upon an
     untrue statement or alleged untrue statement or omission or alleged
     omission made in the Registration Statement, any Preliminary Prospectus,
     the Prospectus or the Prospectus as amended or supplemented in reliance
     upon and in conformity with written information furnished to the Company by
     such Agent specifically for use therein; and provided, further, that the
     indemnity agreement contained in this Section 8(a) shall not inure to the
     benefit of any Agent on account of any losses, claims, damages or
     liabilities or actions in respect thereof arising solely from the sale of
     Securities by or through such Agent pursuant to a Terms Agreement or
     otherwise to any person if a copy of the Prospectus as then amended and
     supplemented with respect to such Securities shall not have been sent or
     given to such person with or prior to written confirmation of the sale
     involved (assuming that the Company shall have previously furnished such
     documents to such Agent in a timely fashion), and if the Prospectus (as so
     amended or supplemented) would have cured the defect giving rise to such
     losses, claims, damages or liabilities.

          (b)  Each Agent will indemnify and hold harmless the Company against
     any losses, claims, damages or liabilities to which the Company may become
     subject, under the Act or otherwise, insofar as such losses, claims,
     damages or liabilities or actions in respect thereof arise out of or are
     based upon an untrue statement or alleged untrue statement of a material
     fact contained in the Registration Statement, any Preliminary Prospectus,
     the Prospectus or the Prospectus as amended or supplemented, or arise out
     of or are based upon the omission or alleged omission to state therein a
     material fact required to be stated therein or necessary to make the
     statements therein not misleading, in each case to the extent, but only to
     the extent, that such untrue statement or alleged untrue statement or
     omission or alleged omission was made in the Registration Statement, any
     Preliminary Prospectus, the Prospectus or the Prospectus as amended or
     supplemented in reliance upon and in conformity with written information
     furnished to the Company by such Agent specifically for use therein, and
     will reimburse the Company for any legal or other expenses incurred by the
     Company, as incurred, in connection with investigating or defending any
     such loss, claim, damage or liability or action. Each Agent hereby


                                       16



     furnishes to the Company in writing expressly for use in the Registration
     Statement, any Preliminary Prospectus, the Prospectus and the Prospectus as
     amended or supplemented [(i) the first sentence in the last paragraph on
     the cover page of the Prospectus relating to the offerings of Medium-Term
     Notes by the Agents, as principal, and (ii)] under "Plan of Distribution,"
     the second and third paragraphs, the third and last sentences of the
     seventh paragraph, the eighth, ninth, tenth and eleventh paragraphs and the
     statements relating to the Agents in the twelveth paragraph.

          (c)  Promptly after receipt by an indemnified party under Section 8(a)
     or Section 8(b) of notice of the commencement of any action, such
     indemnified party shall, if a claim in respect thereof is to be made
     against the indemnifying party under such Section, notify the indemnifying
     party in writing of the commencement thereof; but the omission so to notify
     the indemnifying party shall not relieve it from any liability which it may
     have to any indemnified party otherwise than under such Section. In case
     any such action shall be brought against any indemnified party and it shall
     notify the indemnifying party of the commencement thereof, the indemnifying
     party shall be entitled to participate therein and, to the extent that it
     shall wish, jointly with any other indemnifying party similarly notified,
     to assume the defense thereof, with counsel satisfactory to such
     indemnified party (who shall not, except with the consent of the
     indemnified party, be counsel to the indemnifying party); provided,
                                                               --------
     however, in no event shall such indemnifying parties be obligated to retain
     -------
     more than one counsel (and necessary local counsel), in addition to counsel
     for such indemnifying parties, to represent the indemnified parties, and
     after notice from the indemnifying party to such indemnified party of its
     election so to assume the defense thereof, the indemnifying party shall not
     be liable to such indemnified party under such Section for any legal
     expenses of other counsel or any other expenses, in each case subsequently
     incurred by such indemnified party, in connection with the defense thereof
     other than reasonable costs of investigation. Each indemnified party may
     also participate at its own expense in the defense of any such action. No
     indemnifying party shall, without the prior written consent of the
     indemnified party, effect any settlement of any pending or threatened
     proceeding in respect of which any indemnified party is or could have been
     a party and indemnity could have been sought hereunder by such indemnified
     party, unless such settlement includes (i) an unconditional release of such
     indemnified party from all liability on claims that are the subject matter
     of such proceeding and (ii) no statement as to or an admission of fault,
     culpability or failure to act by or on behalf of an indemnified party.

          (d)  If the indemnification provided for in Section 8(a) or Section
     8(b) hereof is unavailable to or insufficient to hold harmless an
     indemnified party in respect of any losses, claims, damages or liabilities
     (or actions in respect thereof) referred to therein, then each indemnifying
     party shall contribute to the amount paid or payable by such indemnified
     party as a result of such losses, claims, damages or liabilities (or
     actions in respect thereof) in such proportion as is appropriate to reflect
     any relevant equitable considerations including the relative fault of the
     Company on the one hand and each Agent on the other in connection with the
     statements or omissions which resulted in such losses, claims, damages or
     liabilities (or actions in respect thereof), and relative benefit of the
     Company on the one hand and each Agent on the other. Relative fault shall


                                       17



     be determined by reference to, among other things, whether the untrue or
     alleged untrue statement of a material fact or the omission or alleged
     omission to state a material fact required to be stated therein or
     necessary in order to make the statements therein not misleading relates to
     information supplied by the Company on the one hand or by any Agent on the
     other and the parties' relative intent, knowledge, access to information
     and opportunity to correct or prevent such statement or omission. The
     relative benefits received by the Company on the one hand and each Agent on
     the other shall be deemed to be in the same proportion as the total net
     proceeds from the sale of Securities (before deducting expenses) received
     by the Company bear to the total commissions or discounts received by such
     Agent in respect thereof. The Company and each Agent agree that it would
     not be just and equitable if contribution pursuant to this Section 8(d)
     were determined (i) with respect only to any losses, claims, damages or
     liabilities referred to in Section 8(a) hereof, by per capita allocation
     (even if all Agents were treated as one entity for such purpose) or (ii) by
     any method of allocation which does not take account of the equitable
     considerations referred to above in this Section 8(d). The amount paid or
     payable by an indemnified party as a result of the losses, claims, damages
     or liabilities (or actions in respect thereof) referred to above in this
     Section 8(d) shall be deemed to include any legal or other expenses
     reasonably incurred by such indemnified party in connection with
     investigating or defending any such action or claim. No person guilty of
     fraudulent misrepresentation (within the meaning of Section 11(f) of the
     Act) shall be entitled to contribution from any person who was not guilty
     of such fraudulent misrepresentation. The obligations of each of the Agents
     under this Section 8(d) to contribute are several and are not joint.

          (e)  The obligations of the Company under this Section 8 shall be in
     addition to any liability which the Company may otherwise have and shall
     extend, upon the same terms and conditions, to each person, if any, who
     controls any Agent within the meaning of the Act. The obligations of each
     Agent under this Section 8 shall be in addition to any liability which such
     Agent may otherwise have and shall extend, upon the same terms and
     conditions, to each director of the Company, to each officer of the Company
     who has signed the Registration Statement and to each person, if any, who
     controls the Company within the meaning of the Act.

          9.   Nonperformance. Each Agent, in soliciting offers to purchase
               --------------
Securities from the Company and in performing the other obligations of such
Agent hereunder (other than in respect of any purchase by an Agent as principal
pursuant to a Terms Agreement or otherwise), is acting solely as agent for the
Company and not as principal. Each Agent will make reasonable efforts to assist
the Company in obtaining performance by each purchaser whose offer to purchase
Securities from the Company was solicited by such Agent and has been accepted by
the Company, but such Agent shall not have any liability to the Company in the
event such purchase is not consummated for any reason. If the Company shall
default on its obligation to deliver Securities to a purchaser whose offer it
has accepted, the Company shall (i) hold each Agent harmless against any loss,
claim or damage arising from or as a result of such default by the Company and
(ii) notwithstanding such default, pay to the Agent that solicited such offer
any commission to which it would be entitled in connection with such sale.


                                       18



          10.  Survival of Agreement. The respective indemnities, agreements,
               ---------------------
representations, warranties and other statements by any Agent and the Company
set forth in or made pursuant to this Agreement shall remain in full force and
effect regardless of any investigation (or any statement as to the results
thereof) made by or on behalf of any Agent or any controlling person of any
Agent or the Company, or any officer or director or any controlling person of
the Company, and shall survive each delivery of and payment for any of the
Securities.

          11.  Suspension or Termination. The provisions of this Agreement
               -------------------------
relating to the solicitation of offers to purchase Securities from the Company
may be suspended or terminated at any time by the Company as to any Agent or by
any Agent as to such Agent upon the giving of written notice of such suspension
or termination to such Agent or the Company, as the case may be. In the event of
such suspension or termination with respect to any Agent, this Agreement shall
remain in full force and effect with respect to (i) any Agent as to which such
suspension or termination has not occurred, (ii) the rights and obligations of
any party which have previously accrued or which relate to Securities which are
already issued, agreed to be issued or the subject of a pending offer at the
time of such suspension or termination, (iii) Sections 2(e), 5(d), 5(e), 5(l),
8, 9 and 10 hereof, and (iv) the obligations of the Company to amend or
supplement the Prospectus, so long as any Agent continues to hold Securities as
principal.

          12.  Notices. Except as otherwise specifically provided herein or in
               -------
the Administrative Procedure, all statements, requests, notices and advices
hereunder shall be in writing or by telephone, if promptly confirmed in writing,
and if to Merrill Lynch, Pierce, Fenner & Smith Incorporated, shall be
sufficient in all respects when delivered or sent by facsimile transmission
or registered mail to World Financial Center, North Tower, New York, New York
10281, Attn: MTN Product Management, Facsimile Transmission No. 212-449-2234,
Telephone No. 212-449-7476, if to UBS Warburg LLC, shall be sufficient in all
respects when delivered or sent by facsimile transmission or registered mail
to 677 Washington Blvd., Stamford, Connecticut 06901, Facsimile Transmission
No. 203-719-7139, Attn: Kimberly Blue, Managing Director, Debt Capital
Markets, if to Banc One Capital Markets, Inc., shall be sufficient in all
respects when delivered or sent by facsimile transmission or registered mail
to Mail Code IL1-0363, 1 Bank One Plaza, Chicago, Illinois 60670, Facsimile
Transmission No. 312-732-3055, Attention: Robert C. Bussa, Sr. Vice President,
Energy and Utilities and if to U.S. Bancorp Piper Jaffray Inc., shall be
sufficient in all respects when delivered or sent by facsimile transmission
or registered mail to 111 SW Fifth Avenue, Suite 1900, Portland, Oregon 97204,
Facsimile Transmission No. 503-275-3490, Attention: Fixed Income Capital
Markets ; if to the Company, shall be sufficient in all respects when delivered
or sent by facsimile transmission or registered mail to One Pacific Square,
220 N.W. Second Avenue, Portland, Oregon 97209, Attention: Chief Financial
Officer, with a copy to the General Counsel, Facsimile Transmission No.
503-220-2584, Telephone No. 503-220-2406; and if to any additional Agent, as
set forth in the Additional Agent Appointment Agreement relating to such Agent.

          13.  Benefit of Agreement. This Agreement, any Additional Agent
               --------------------
Appointment Agreement and any Terms Agreement shall be binding upon, and inure
solely to the benefit of, each Agent a party hereto and thereto and the Company,
and to the extent provided in Section 8 and Section 10 hereof, the officers and
directors of the Company and any person who controls any Agent or the Company,
and their respective personal representatives, successors and assigns, and no


                                       19



other person shall acquire or have any right under or by virtue of this
Agreement, any Additional Agent Appointment Agreement or any Terms Agreement. No
purchaser of any of the Securities through or from any Agent hereunder shall be
deemed a successor or assign by reason of such purchase.

          14.  Timing. Time shall be of the essence in this Agreement, any
               ------
Additional Agent Appointment Agreement and any Terms Agreement. As used herein,
the term "business day" shall mean any day when banks in New York City are not
authorized or obligated by law or executive order to remain closed.

          15.  Governing Law. This Agreement, any Additional Agent Appointment
               -------------
Agreement and any Terms Agreement shall be governed by and construed in
accordance with the laws of the State of New York.

          16.  Descriptive Headings. The descriptive headings of the several
               --------------------
paragraphs of this Agreement are inserted for convenience only and do not
constitute a part of this Agreement.

          17.  Execution in Counterparts. This Agreement, any Additional Agent
               -------------------------
Appointment Agreement and any Terms Agreement may be executed by any one or more
of the parties hereto and thereto in any number of counterparts, each of which
shall be an original, but all of such respective counterparts shall together
constitute one and the same instrument.


                                       20



          If the foregoing is in accordance with your understanding, please sign
and return to us three counterparts hereof, whereupon this letter and the
acceptance by each of you hereof shall constitute a binding agreement between
the Company and each of you in accordance with its terms.

                                        Very truly yours,

                                        NORTHWEST NATURAL GAS COMPANY


                                        By:
                                           ------------------------------------
                                           Senior Vice President,
                                           Finance, and Chief Financial
                                           Officer

Accepted as of the date hereof:

MERRILL LYNCH, PIERCE, FENNER & SMITH
  INCORPORATED


By:
  ------------------------------------
  Title:


UBS WARBURG LLC


By:
  ------------------------------------
  Title:


By:
  ------------------------------------
  Title:


BANC ONE CAPITAL MARKETS, INC.


By:
  ------------------------------------
  Title:


U.S. BANCORP PIPER JAFFRAY INC.


By:
  ------------------------------------
  Title:


                                       21



                                                                         ANNEX I

                          Northwest Natural Gas Company

                            Administrative Procedure
                            ------------------------

          This Administrative Procedure relates to the Securities defined in the
Distribution Agreement, dated o, 2000 (the "Distribution Agreement"), amongst
Northwest Natural Gas Company (the "Company"), on the one hand, and Merrill
Lynch, Pierce, Fenner & Smith Incorporated, UBS Warburg LLC, Banc One Capital
Markets, Inc., U.S. Bancorp Piper Jaffray Inc. and each other person which
shall become a party thereto (each, an "Agent" and, together, the "Agents"),
on the other. Defined terms used herein and not defined herein shall have the
meanings given such terms in the Distribution Agreement or the Indentures. An
Agent, in relation to a purchase of a Security by a purchaser solicited by
such Agent, is referred to herein as the "Selling Agent" and, in relation to
a purchase of a Security by such Agent as principal other than pursuant to a
Terms Agreement, as the "Purchasing Agent". As used herein, the term
"business day" shall mean any day when banks in New York City are not
authorized or obligated by law or executive order to remain closed.

          The procedures to be followed with respect to the settlement of sales
of Securities directly by the Company to purchasers solicited by an Agent, as
agent, are set forth below. The terms and settlement details related to a
purchase of Securities by an Agent, as principal, from the Company will be set
forth in a Terms Agreement, pursuant to the Distribution Agreement, unless the
Company and such Agent otherwise shall agree.

          The Company will advise each Agent in writing of those persons with
whom such Agent is to communicate regarding offers to purchase Securities and
the related settlement details.

          Order No. 98-293 dated July 10, 1998, as amended by Order No. 00-333
dated June 23, 2000 and Order No. 00-547 dated September 15, 2000, of the Oregon
Public Utility Commission (the "OPUC") authorizes the issuance and sale of the
Securities, provided that the Company report at least two bid quotes for each
Security issued and that the Company's senior debt securities maintain
investment grade bond ratings from at least two nationally recognized
statistical rating organizations. The order dated June 25, 1998, as supplemented
by the First Supplemental Order dated May 30, 2000, and the order dated August
20, 2000 of the Washington Utilities and Transportation Commission (the "WUTC")
establishes compliance with applicable statutory provisions with respect to the
issuance and sale of the Securities. In addition, such order of the OPUC
authorizes, and such order of the WUTC establishes compliance with applicable
statutory provisions with respect to, the issuance and sale by the Company (i)
only of Securities bearing interest at fixed rates, established within the
maximum all-in spreads over Benchmark Treasury Yields for various maturities
(determined in accordance with said orders as of the time the commitment to
purchase any Securities is received by the Company and the Agent) and (ii) of
Securities to Agents, as principal, at 100% of the principal amount thereof less
a percentage not to exceed the commission applicable to an agency sale of
Securities of the same maturity.





          As stated in the Company's Prospectus dated o, 2000, if the terms of
any Security, as determined by the Company, provide that such Security will be
redeemable at the option of the company, such Security will be made redeemable
in whole or in part.

Procedure for Rate Changes:
- --------------------------

          When a decision has been reached to change the interest rate on or
other variable terms with respect to any Securities being offered for sale, the
Company will promptly advise the Agents and the Agents will forthwith suspend
solicitation of offers to purchase such Securities. The Agent will telephone the
Company with recommendations as to the changed interest rates or other variable
terms. At such time as the Company advises the Agents of the new interest rates
or other variable terms, the Agent may resume solicitation of offers to purchase
such Securities. Until such time only "indications of interest" may be recorded.

Acceptance or Rejection of Offers by Company:
- --------------------------------------------

          Each Agent will promptly advise the Company by telephone or other
appropriate means of all reasonable offers to purchase Securities, other than
those rejected by such Agent. Each Agent, in its discretion reasonably
exercised, may reject any offer received by it, in whole or in part. Each Agent
also may make offers to the Company to purchase Securities as a Purchasing
Agent. The Company, in its sole discretion, may accept any offer to purchase
Securities and may reject any such offer, in whole or in part.

          The Company will promptly notify the Selling Agent or Purchasing
Agent, as the case may be, of its acceptance or rejection of an offer to
purchase Securities. If the Company accepts an offer to purchase Securities, it
will confirm such acceptance in writing to the Selling Agent or Purchasing
Agent, as the case may be.

          As mentioned above, the order dated July 10, 1998, as amended, of the
OPUC requires that, for each issuance of Securities, the Company seek and report
to the OPUC at least one other bid quote in addition to the bid that is
accepted.

Settlement:
- ----------

          The receipt of immediately available funds by the Company in payment
for a Security and the authentication and delivery of such Security will, with
respect to such Security, constitute "Settlement."

          All offers solicited by a Selling Agent or made by a Purchasing Agent
and accepted by the Company will be settled on a date (the "Settlement Date")
which shall be the third business day after the date of acceptance of such
offer, unless the Company and the purchaser shall agree to settle (a) on any
other business day after the acceptance of such offer or (b) with respect to an
offer accepted by the Company prior to 10:00 a.m., New York City time, on the
date of such acceptance.


                                      I-2



Settlement Procedures:
- ---------------------

     A.   After the acceptance of an offer by the Company, the Selling Agent
or Purchasing Agent, as the case may be, will communicate the following details
of the terms of such offer (the "Sale Information") to the Company by telephone
(confirmed in writing) or by facsimile transmission or other acceptable written
means:

     (1)  Principal amount of Securities to be purchased;

     (2)  Issue Price ("Issue Price" shall mean (i) in the case of a sale in
          which an Agent shall act as a Selling Agent, the price to the
          purchaser or (ii) in the case of a sale to an Agent as Purchasing
          Agent, that Purchasing Agent's reoffering price);

     (3)  Selling Agent's commission or, if applicable, Purchasing Agent's
          discount (spread between the reoffering price and Purchasing Agent's
          purchase price);

     (4)  Net proceeds to the Company: (2) minus (3);

     (5)  Method of and specified funds for payment of purchase price:

     (6)  (a)  Fixed rate Securities:

               (i)  interest rate
               (ii) interest payment dates
               (iii) regular record dates;

          (b)  Floating rate Securities:

               (i)  interest rate basis
               (ii) initial interest rate
               (iii) spread or spread multiplier, if any
               (iv) interest rate reset dates
               (v)  interest rate reset period
               (vi) interest payment dates
               (vii) initial interest payment date
               (viii) interest payment period
               (ix) regular record dates
               (x)  index maturity
               (xi) calculation agent
               (xii) maximum and minimum interest rates, if any
               (xiii) calculation date
               (xiv) interest determination dates;

     (7)  (a)  Trade Date;

          (b)  Interest Commencement Date (Settlement Date unless otherwise
               noted; "Issue Date" on Secured Notes);


                                      I-3



          (c)  Time of delivery;

     (8)  Closing location;

     (9)  Maturity date;

     (10) If redeemable at the Company's option:

          (a)  whether redeemable (i) in whole or (ii) in whole or in part;

          (b)  initial redemption date;

          (c)  redemption limitation date;

          (d)  each redemption price and period;

     (11) Sinking fund or other retirement provisions;

     (12) If repayable at the holder's option:

          (a)  repayment date;

          (b)  repayment price;

          (c)  election period;

     (13) The name of the Selling Agent or Purchasing Agent, as the case may be;

     (14) Exact name, address and taxpayer identification number of party to be
          the registered owner;

     (15) Party to whom Securities are to be delivered;

     (16) Denominations of certificates to be delivered at settlement;

     (17) The name of the Company's bank and the account number for payment of
          the purchase price;

     (18) Whether the Securities to be purchased are Secured Notes or Unsecured
          Notes;

     (19) Any other significant terms of the Securities or their offer or sale.

     B.   After receiving such settlement information from the Agent, the
Company will advise the Trustee of the above settlement information. The Company
will prepare a Pricing Supplement to the Prospectus and deliver copies to the
Agent and will cause the Trustee to issue, authenticate and deliver Securities.

          If an identical Pricing Supplement has not been previously filed with
the Securities and Exchange Commission (the "SEC"), the Company will arrange to


                                      I-4



have transmitted promptly via EDGAR one copy of the Pricing Supplement (with the
appropriate paragraph under Rule 424(b) and the Registration No. inscribed in
the upper right corner) to the SEC, within the applicable time period provided
in Rule 424(b).

One copy of the Pricing Supplement (with a copy of the cover letter sent to the
SEC if a filing with the SEC is required) will be sent by facsimile to the
Agents as soon as practicable but in no event later than 12:00 noon on the
second day after the Trade Date at each of the following numbers:

               Merrill Lynch & Co. - Tritech Services
               44B Colonial Drive
               Piscataway, NJ 08854
               Attn: Final Prospectus Unit/Nachman Kimerling
               Facsimile No:  732-885-2774/2775/2776
               Telephone No:  732-865-2768

and

               Merrill Lynch, Pierce, Fenner & Smith
               Incorporated
               Merrill Lynch World Headquarters
               World Financial Center, North Tower
               10th Floor
               New York, NY 10281-1310
               Attn: MTN Product Management
               Facsimile No:  212-449-2234
               Telephone No:  212-449-7476

and

               UBS Warburg LLC
               677 Washington Blvd.
               Stamford, Connecticut 06901
               Attn:  Kimberly Blue
               Managing Director, Debt Capital Markets
               Facsimile No:  203-719-7139
               Telephone No:

and

               Banc One Capital Markets, Inc.
               Mail Code IL1-0363
               1 Bank One Plaza
               Chicago, Illinois  60670
               Attn:  Robert C. Bussa
               Facsimile No: 312-732-3055
               Telephone No:


                                      I-5



and

               U.S. Bancorp Piper Jaffray Inc.
               111 SW Fifth Avenue, Suite 1900
               Portland, Oregon 97204
               Attn:  Fixed Income Capital Markets
               Facsimile No:  503-275-3490
               Telephone No:  503-275-4131

          The Company shall supply the Agents as soon as practicable but in no
event later than the Settlement Date with an adequate supply of Prospectuses and
Pricing Supplements at the above addresses.

          In addition, the Company will make any required filings with the OPUC
and WUTC in respect of the Securities that are issued.

Suspension of Solicitation; Amendment or Settlement:
- ---------------------------------------------------

          Subject to its representations, warranties and covenants contained in
the Distribution Agreement, the Company may instruct the Agents to suspend
solicitation of purchases at any time. Upon receipt of such instructions, the
Agents will forthwith suspend solicitation of offers to purchase from the
Company until such time as the Company has advised them that solicitation of
offers to purchase may be resumed. If the Company decides to amend or supplement
the Prospectus (other than to change interest rates or other variable terms with
respect to the offering of the Securities), it will promptly advise the Agents
and will furnish the Agents and their counsel with copies of the proposed
amendment or supplement.

          In the event that at the time the solicitation of offers to purchase
from the Company is suspended (other than to change interest rates or other
variable terms) there shall be any orders outstanding which have not been
settled, the Company will promptly advise the Agents and the Trustee whether
such orders may be settled and whether copies of the Prospectus as theretofore
amended and/or supplemented as in effect at the time of the suspension may be
delivered in connection with the settlement of such orders. The Company will
have the sole responsibility for such decision and for any arrangements which
may be made in the event that the Company determines that such orders may not be
settled or that copies of such Prospectus may not be so delivered.

Delivery of Confirmation and Prospectus to Purchaser by Selling Agent:
- ---------------------------------------------------------------------

          The Selling Agent will deliver to the purchaser of a Security a
written confirmation of the sale and delivery and Payment instructions. In
addition, the Selling Agent will deliver to such purchaser or its agent the
Prospectus as amended or supplemented (including the Pricing Supplement)
relating to such Security prior to delivery to such purchaser or its agent of,
or together with, the earlier to be delivered of (a) the confirmation of sale or
(b) the Security.


                                      I-6



Instruction from Company to Trustee for Preparation of Securities:
- -----------------------------------------------------------------

          After receiving the Sale Information from the Selling Agent or
Purchasing Agent, as the case may be, the Company will communicate such Sale
Information to the Mortgage Trustee or the Indenture Trustee, as the case may
be, by telephone (confirmed in writing, by facsimile transmission or by other
acceptable written means).

          The Company will instruct such Trustee by telephone (confirmed in
writing, by facsimile transmission or by other acceptable written means) to
authenticate and deliver the Securities no later than 2:15 p.m., New York City
time, on the Settlement Date. Such instruction will be given by the Company
prior to 3:00 p.m., New York City time, on the business day prior to the
Settlement Date, unless the Settlement Date is the date of acceptance by the
Company of the offer to purchase Securities, in which case such instruction will
be given by the Company to the Trustee by 10:00 a.m., New York City time, on the
Settlement Date.

Procedures for Book-Entry Securities:
- ------------------------------------

          In connection with Securities issued in book-entry form and maintained
in the book-entry system of The Depository Trust Company ("DTC"), (i) the
Company and the Trustee shall act in accordance with the letters of
representation (relating to the Secured Notes and the Unsecured Notes,
respectively) from the Company and the Trustee to DTC, as the same may be
amended, supplemented or otherwise modified from time to time, and (ii) the
Trustee shall act in accordance with one or more Medium-Term Note Certificate
Agreements, relating to the Securities, between the Trustee and DTC, as the same
may be amended, supplemented or otherwise modified from time to time, and in
accordance with its obligations as a participant in DTC.

          The beneficial owner of a Security issued in book-entry form (or one
or more indirect participants in DTC designated by such owner) will designate
one or more participants in DTC (with respect to such Security issued in
book-entry form, the "Participants") to act as agent for such beneficial owner
in connection with the book-entry system maintained by DTC, and DTC will record
in book-entry form, in accordance with instructions provided by such
Participants, a credit balance with respect to such Security issued in
book-entry form in the account of such Participants. The ownership interest of
such beneficial owner in such Security issued in book-entry form will be
recorded through the records of such Participants or through the separate
records of such Participants and one or more indirect participants in DTC.

          Transfers of a Book-Entry Security will be accomplished by book
entries made by DTC and, in turn, by Participants (and in certain cases, one or
more indirect participants in DTC) acting on behalf of beneficial transferors
and transferees of such Book-Entry Security.

          Beneficial interests in the Securities may be purchased, owned and
transferred only in denominations of $1,000 or any integral multiple of $1,000.

Preparation and Delivery of Securities by Trustee and Receipt of Payment
- ------------------------------------------------------------------------
Therefor:
- ---------

                             Certificated Securities
                             -----------------------

          The Company will instruct the Mortgage Trustee or the Indenture
Trustee, as the case may be, to:


                                      I-7



     (i)  Prepare each Security and appropriate receipts that will serve as the
          documentary control of the transaction.

     (ii) In the case of a sale of Securities to a purchaser solicited by a
          Selling Agent, by 2:15 p.m., New York City time, on the Settlement
          Date, deliver the Securities to such Selling Agent, at the address
          listed below, for the benefit of the purchaser of such Securities
          against delivery by such Selling Agent of a receipt therefor. (On the
          Settlement Date, such Selling Agent will deliver payment for such
          Securities in immediately available funds to the Company's account at
          a bank designated by the Company and included as a part of the Sale
          Information provided by the Selling Agent in an amount equal to the
          net proceeds to the Company; provided that the Selling Agent reserves
          the right to withhold payment for which it shall not have received
          funds from the purchaser.)

     (iii) In the case of a sale of Securities to a Purchasing Agent, by 2:15
          p.m., New York City time, on the Settlement Date, deliver the
          Securities to such Purchasing Agent, at the address listed below,
          against delivery of payment therefor. (On the Settlement Date, such
          Purchasing Agent will deliver payment for such Securities in
          immediately available funds to the Company's account at a bank
          designated by the Company and included as a part of the Sale
          Information provided by the Purchasing Agent in an amount equal to the
          net proceeds to the Company.)

     (iv) Complete the 4-ply Security and deliver three copies thereof as
          follows:

          1.   Security with Agent's customer confirmation.

          2.   Copy 1 - for Trustee.

          3.   Copy 2 - for Agent.

          4.   Copy 3 - for Company.

     (v)  With respect to each sale, deliver the Securities and Copies 1 and 2
          thereof to the appropriate Agent at the following address:

          Merrill Lynch, Pierce, Fenner & Smith
                  Incorporated
          55 Water Street
          Concourse Level, N.S.C.C. Window
          New York, New York  10041
          Attn:  Al Mitchell
          Facsimile No:

          or

          UBS Warburg LLC
          677 Washington Blvd.


                                      I-8



          Stamford, Connecticut 06901
          Attn:  Kimberly Blue
          Managing Director, Debt Capital Markets
          Facsimile No:  203-719-7139

          or

          Banc One Capital Markets, Inc.
          Mail Code IL1-0363
          1 Bank One Plaza
          Chicago, Illinois  60670
          Attn:  Robert C. Bussa
          Facsimile No:  312-732-3055

          or

          U.S. Bancorp Piper Jaffray Inc.
          111 SW Fifth Avenue, Suite 1900
          Portland, Oregon 97204
          Attn:  Fixed Income Capital Markets
          Facsimile No:  503-275-3490


          as the case may be, or to any other Agent as directed by such Agent.
          (The Agent will acknowledge receipt of the Security, will keep Copy 2
          and will return Copy 1 to the Trustee. Delivery of the Security by the
          Trustee will be made only against such acknowledgment of receipt.
          Prior to the first settlement date, the Trustee or the Company shall
          have sent a letter to Merrill Lynch Clearance Operations, UBS Warburg
          LLC, Banc One Capital Markets, Inc., U.S. Bancorp Piper Jaffray Inc.
          or any other Agent, as the case may be, containing standard wire
          instructions for the net proceeds of each Security, addressed as
          follows:

          Merrill Lynch, Pierce, Fenner & Smith
            Incorporated
          World Financial Center
          North Tower
          New York, New York 10281
          Facsimile No:

          or

          UBS Warburg LLC
          677 Washington Blvd.
          Stamford, Connecticut 06901
          Attn:  Kimberly blue
          Managing Director, Debt Capital Markets
          Facsimile No:  203-719-7139


                                      I-9



          or

          Banc One Capital Markets, Inc.
          Mail Code IL1-0363
          1 Bank One Plaza
          Chicago, Illinois  60670
          Attn:  Robert C. Bussa
          Facsimile No:  312-732-3055

          or

          U.S. Bancorp Piper Jaffray Inc.
          111 SW Fifth Avenue, Suite 1900
          Portland, Oregon 97204
          Attn:  Fixed Income Capital Markets
          Facsimile No:  503-275-3490

          as the case may be, or as directed by such other Agent.)

     (vi) Send Copy 3 to the Company.

                              Book-Entry Securities
                              ---------------------

     A.   The Company will assign a CUSIP number to the Book-Entry Security
representing such Security and then advise the Trustee by electronic
transmission of the Sale Information received from the Agent, such CUSIP number
and the name of such Agent.

     B.   The Trustee will communicate to DTC and the Agent through DTC's
Participant Terminal System, a pending deposit message specifying the following
settlement information:

     (1)  The following Sale Information with respect to each Security:

          (a)  Taxpayer identification number of the purchaser.

          (b)  Principal amount of the Security.

          (c)  Fixed Rate Securities:

               (i)  interest rate;
               (ii) interest payment dates; and
               (iii) regular record dates.

          (d)  Floating Rate Securities:

               (i)  interest rate basis;
               (ii) initial interest rate;
               (iii) spread or spread multiplier, if any;
               (iv) interest rate reset dates;


                                      I-10



               (v)  interest rate reset period;
               (vi) interest payment dates;
               (vii) interest payment period;
               (viii) regular record dates;
               (ix) index maturity;
               (x)  calculation agent;
               (xi) maximum and minimum interest rates, if any;
               (xii) calculation date; and
               (xiii) interest determination dates.

          (e)  Issue price.

          (f)  Trade date.

          (g)  Interest Commencement Date, which shall be the Settlement Date
               unless otherwise noted ("Issue Date" on Secured Notes).

          (h)  Maturity date.

          (i)  Net proceeds to the Company.

          (j)  Agent's commission.

          (k)  Redemption provisions, if any.

          (l)  Repayment provisions, if any.

     (2)  Identification numbers of the participant accounts maintained by DTC
          on behalf of the Trustee and the Agent.

     (3)  Identification as a Fixed Rate Book-Entry Security or Floating Rate
          Book-Entry Security.

     (4)  Initial Interest Payment Date for such Security, number of days by
          which such date succeeds the related record date for DTC purposes (or,
          in the case of Floating Rate Securities which reset daily or weekly,
          the date five calendar days preceding the Interest Payment Date) and,
          if then calculable, the amount of interest payable on such Interest
          Payment Date (which amount shall have been confirmed by the Trustee).

     (5)  CUSIP number of the Book-Entry Security representing such Security.

     (6)  Whether such Book-Entry Security represents any other Securities
          issued or to be issued in book-entry form.

     C.   The Company will complete and deliver to the Trustee a Book-Entry
Security representing such Security in a form that has been approved by the
Company, the Agents and the Trustee.


                                      I-11



     D.   The Trustee will authenticate the Book-Entry Security representing
such Security.

     E.   DTC will credit such Security to the participant account of the
Trustee maintained by DTC.

     F.   The Trustee will enter a Same-Day Funds Settlement System ("SDFS")
deliver order through DTC's Participant Terminal System instructing DTC (i) to
debit such Security to the Trustee's participant account and credit such
Security to the participant account, maintained by DTC, of the Agent which
presented to the Company the offer to purchase such Security which was accepted
by the Company (the "Presenting Agent") and (ii) to debit the settlement account
of the Presenting Agent and credit the settlement account of the Trustee
maintained by DTC, in an amount equal to the price of such Security less such
Agent's commission.

     G.   The Presenting Agent will enter an SDFS deliver order through DTC's
Participant Terminal System instructing DTC (i) to debit such Security to the
Presenting Agent's participant account and credit such Security to the
participant account of the Participants maintained by DTC and (ii) to debit the
settlement accounts of such Participants and credit the settlement account of
the Presenting Agent maintained by DTC, in an amount equal to the initial public
offering price of such Security.

     H.   Transfer of funds in accordance with SDFS deliver orders described in
Settlement Procedures F and G will be settled in accordance with SDFS operating
procedures in effect on the Settlement Date.

     I.   The Trustee will credit to an account of the Company maintained at the
Trustee funds available for immediate use in the amount transferred to the
Trustee in accordance with Settlement Procedure F.

     J.   The Trustee will send a copy of the Book-Entry Security by first class
mail to the Company together with a statement setting forth the principal amount
of Securities Outstanding as of the related Settlement Date after giving effect
to such transaction and all other offers to purchase Securities of which the
Company has advised the Trustee but which have not yet been settled.

     K.   The Agent will confirm the purchase of such Security to the purchaser
either by transmitting to the Participant with respect to such Security a
confirmation order through DTC's Participant Terminal System or by mailing a
written confirmation to such purchaser.

     L.   Settlement Procedures Timetable:

     (1)  For orders of Securities accepted by the Company, Settlement
          Procedures A through K shall be completed as soon as possible but not
          later than the respective times (New York City time) set forth below:

                      Settlement
                      Procedure                   Time
                      ---------                   ----

                           A                      11:00 a.m. on the trade date


                                      I-12



                           B                      2:00 p.m. on the trade date
                           C                      3:00 p.m. on the Business Day
                                                  before Settlement Date
                           D                      9:00 a.m. on Settlement Date
                           E                      10:00 a.m. on Settlement Date
                           F-G                    No later than 2:00 p.m. on
                                                  Settlement Date
                           H                      4:45 p.m. on Settlement Date
                           I-K                    5:00 p.m. on Settlement Date

     (2)  If a sale is to be settled more than one Business Day after trade
          date, Settlement Procedures A and B may, if necessary, be completed at
          any time prior to the specified times on the first Business Day after
          such trade date. In connection with a sale which is to be settled more
          than one Business Day after the trade date, if the initial interest
          rate for a Floating Rate Security is not known at the time that the
          Sale Information is given by the Presenting Agent to the Company,
          Settlement Procedures A and B shall be completed as soon as such rates
          have been determined, but no later than 11:00 a.m. and 2:00 p.m., New
          York City time, respectively, on the second Business Day before the
          Settlement Date. Settlement Procedure H is subject to extension in
          accordance with any extension of Fedwire closing deadlines and in the
          other events specified in the SDFS operating procedures in effect on
          the Settlement Date.

     (3)  If settlement of a Security issued in book-entry form is rescheduled
          or canceled, the Trustee will deliver to DTC, through DTC's
          Participant Terminal System, a cancellation message to such effect by
          no later than 2:00 p.m., New York City time, on the Business Day
          immediately preceding the scheduled Settlement Date.

Failure of Purchaser to Pay Selling Agent:
- -----------------------------------------

                             Certificated Securities
                             -----------------------

          If a purchaser shall fail to make payment to the Selling Agent for any
Security, the net proceeds to the Company which, theretofore, shall have been
paid by the Selling Agent to the Company, the Selling Agent will promptly notify
the Mortgage Trustee or the Indenture Trustee, as the case may be, and the
Company of such failure by telephone, promptly confirmed in writing or by
facsimile transmission or by other acceptable written means. The Selling Agent
promptly will return such Security to such Trustee. Promptly upon receipt of
such Security by such Trustee, the Company will return to the Selling Agent an
amount equal to the amount previously paid to the Company in respect of such
Security. Such Trustee will cancel any Security in respect of which such a
failure shall occur, make appropriate entries in its records and, unless
otherwise instructed by the Company, destroy such Security.

                              Book-Entry Securities
                              ---------------------

          If the Trustee fails to enter an SDFS deliver order with respect to a
Book-Entry Security issued in book-entry form pursuant to paragraph F above, the
Trustee may deliver to DTC, through DTC's Participant Terminal System, as soon


                                      I-13



as practicable a withdrawal message instructing DTC to debit such Security to
the participant account of the Trustee maintained at DTC. DTC will process the
withdrawal message, provided that such participant account contains a principal
amount of the Book-Entry Security representing such Security that is at least
equal to the principal amount to be debited. If withdrawal messages are
processed with respect to all the Securities represented by a Book-Entry
Security, the Trustee will mark such Book-Entry Security "canceled", make
appropriate entries in its records and send such canceled Book-Entry Security to
the Company. The CUSIP number assigned to such Book-Entry Security shall, in
accordance with CUSIP Service Bureau procedures, be canceled and not immediately
reassigned. If withdrawal messages are processed with respect to a portion of
the Securities represented by a Book-Entry Security, the Trustee will exchange
such Book-Entry Security for two Book-Entry Securities, one of which shall
represent the Book-Entry Securities for which withdrawal messages are processed
and shall be canceled immediately after issuance, and the other of which shall
represent the other Securities previously represented by the surrendered
Book-Entry Security and shall bear the CUSIP number of the surrendered
Book-Entry Security.

          If the purchase price for any Book-Entry Security is not timely paid
to the Participants with respect to such Security by the beneficial purchaser
thereof (or a person, including an indirect participant in DTC acting on behalf
of such purchaser), such Participants and, in turn, the related Agent may enter
SDFS deliver orders through DTC's Participant Terminal System reversing the
orders entered pursuant to paragraphs F and G above, respectively. Thereafter,
the Trustee will deliver the withdrawal message and take the related actions
described in the preceding paragraph. If such failure shall have occurred for
any reason other than default by the applicable Agent to perform its obligations
hereunder or under the Distribution Agreement, the Company will reimburse such
Agent on an equitable basis for its loss of the use of funds during the period
when the funds were credited to the account of the Company.

          Notwithstanding the foregoing, upon any failure to settle with respect
to a Book-Entry Security, DTC may take any actions in accordance with its SDFS
operating procedures then in effect. In the event of a failure to settle with
respect to a Security that was to have been represented by a Book-Entry Security
also representing other Securities, the Trustee will provide, in accordance with
paragraphs C and D above, for the authentication and issuance of a Book-Entry
Security representing such remaining Securities and will make appropriate
entries in its records.


                                      I-14



                                                                        ANNEX II

                          Northwest Natural Gas Company

                                Medium-Term Notes

                                 Terms Agreement
                                 ---------------

[Merrill Lynch, Pierce, Fenner & Smith
  Incorporated
World Financial Center
North Tower
New York, New York  10281]

[UBS Warburg LLC
677 Washington Blvd.
Stamford, Connecticut 06901]

[Banc One Capital Markets, Inc.
1 Bank One Plaza
Chicago, Illinois  60670]

[U.S. Bancorp Piper Jaffray Inc.
111 SW Fifth Avenue, Suite 1900
Portland, Oregon 97204]

[Name of additional Agents, if any]

Dear Sirs:

          Subject to the terms and conditions set forth herein and, to the
extent provided below, in the Distribution Agreement, dated o, 2001 (the
"Distribution Agreement"), amongst Northwest Natural Gas Company (the
"Company"), on the one hand, and Merrill Lynch, Pierce, Fenner & Smith
Incorporated, UBS Warburg LLC, Banc One Capital Markets, Inc., U.S. Bancorp
Piper Jaffray Inc. and each other person which shall become a party to the
Distribution Agreement (each an "Agent" and, together, the "Agents"), on the
other, the Company proposes to issue and sell to [Merrill Lynch, Pierce,
Fenner & Smith Incorporated] [UBS Warburg LLC] [Banc One Capital Markets,
Inc.] [U.S. Bancorp Piper Jaffray Inc.] [Name of other Agent] the Securities
(as defined in the Distribution Agreement) specified in the Schedule hereto
(the "Purchased Securities"), at the time, place and purchase price and upon
the terms and conditions set forth in such Schedule. Each of the provisions
of the Distribution Agreement not specifically related to the solicitation by
the Agents, as agents of the Company, of offers to purchase Securities is
incorporated herein by reference, and shall be deemed to be part of this
Terms Agreement to the same extent as if such provisions had been set
forth herein.





          Each of the representations and warranties set forth in the
Distribution Agreement shall be deemed to have been made by the Company at and
as of the date of this Terms Agreement, except that each such representation and
warranty which makes reference to the Prospectus shall be deemed to be a
representation and warranty as of the date of the Distribution Agreement in
relation to the Prospectus (as therein defined), and also a representation and
warranty as of the date of this Terms Agreement in relation to the Prospectus as
amended and supplemented with respect to the Purchased Securities.

          A supplement to the Prospectus relating to the Purchased Securities,
in the form heretofore delivered to and approved by you, is now proposed to be
filed with the Commission in accordance with Rule 424(b) under the Act.

          Subject to the terms and conditions set forth herein and to those of
the Distribution Agreement incorporated herein by reference, the Company agrees
to issue and sell to [Merrill Lynch, Pierce, Fenner & Smith Incorporated] [UBS
Warburg LLC] [Banc One Capital Markets, Inc.] [U.S. Bancorp Piper Jaffray
Inc.] [Name of other Agent] and [Merrill Lynch, Pierce, Fenner & Smith
Incorporated] [UBS Warburg LLC] [Banc One Capital Markets, Inc.] [U.S.
Bancorp Piper Jaffray Inc.] [Name of other Agent] agrees to purchase from
the Company the Purchased Securities, at the time and place, in the principal
amount and at the purchase price set forth in the Schedule hereto.

          If the foregoing is in accordance with your understanding, please sign
and return to us three counterparts hereof, whereupon this letter, including
those provisions of the Distribution Agreement incorporated herein by reference,
shall constitute a binding agreement between you and the Company.

                                        NORTHWEST NATURAL GAS COMPANY


                                        By:
                                           ------------------------------------
                                           Title:

Accepted as of the date hereof:

[MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED


By:
   ------------------------------------
   Title:                                  ]


[UBS WARBURG LLC]


By:
   ------------------------------------
   Title:                                  ]


By:
   ------------------------------------
   Title:                                  ]


                                      II-2



[BANC ONE CAPITAL MARKETS, INC.


By:
   ------------------------------------
   Title:                                  ]


[U.S. BANCORP PIPER JAFFRAY INC.]


By:
   ------------------------------------
   Title:                                  ]

 [Name of other Agent, if any]


                                      II-3



                                                            Schedule to Annex II

Title of Purchased Securities:
- -----------------------------

Aggregate Principal Amount:  $
- --------------------------

Price to Public:
- ---------------

Purchase Price by [Merrill Lynch, Pierce, Fenner & Smith Incorporated]
- --------------
[UBS Warburg LLC] [Banc One Capital Markets, Inc.] [U.S. Bancorp
Piper Jaffray Inc.] [Name of other Agent]:

     %  of the principal amount of the Purchased Securities  [, plus accrued
interest from to        ] [and accrued amortization of discount from
to       ]

Method of and Specified Funds for Payment of Purchase Price:
- -----------------------------------------------------------

          [By certified or official bank check or checks, payable to the order
of the Company, in [[New York Clearing House] [immediately available] funds]

          [By wire transfer to a bank account specified by the Company in [next
day] [immediately available] funds]

Indenture:   [Mortgage] [Note Indenture]
- ---------

Interest Commencement Date which shall be the Settlement Date unless otherwise
noted ("Issue Date" on Secured Notes):

Time of Delivery:
- ----------------

Closing Location:
- ----------------

Stated Maturity Date:
- --------------------

Interest Rate or Rates (or Method of Determining Interest):
- ----------------------------------------------------------

Interest Payment Dates: [months and dates]
- ----------------------

Initial Interest Payment Date:
- -----------------------------

Regular Record Dates:
- --------------------

Redeemable at Company's Option:  Yes        No
- ------------------------------       ---       ---
        In Whole:  Yes    No
                      ---   ---
        In Part:   Yes    No
                      ---   ---

Initial Redemption Date:
- -----------------------

Redemption Limitation Date:
- --------------------------


                                      II-4



Initial Redemption Price:
- ------------------------

Reduction Percentage:
- --------------------

Sinking Fund or Other Retirement Provisions, if any:
- ---------------------------------------------------

Repayable at Option of Holder:  Yes      No
- -----------------------------       ---     ---

Repayment Date:
- --------------

Repayment Price:
- ---------------

Election Period:
- ---------------

Documents to be Delivered as a Condition to the Closing:

     [(1) The opinion of counsel to the Agents referred to in Section 5(h)]

     [(2) The opinion of counsel to the Company referred to in Section 5(i)(i)]

     [(3) The opinion of counsel to the Company referred to in Section 5(i)(ii)]

     [(4) The opinion of counsel to the Company referred to in Section
          5(i)(iii)]

     [(5) The accountants letter referred to in Section 5(j)]

     [(6) The officers certificate referred to in Section 5(i)(iv)]

Other Provisions (including Syndicate Provisions,
- -------------------------------------------------
if applicable):
- --------------


                                      II-5



                                                                       ANNEX III

                         [Letterhead of Mark S. Dodson]




                                        o, 2001


Merrill Lynch, Pierce, Fenner & Smith
   Incorporated
World Financial Center
North Tower
New York, New York  10281

UBS Warburg LLC
677 Washington Blvd.
Stamford, Connecticut 06901

Banc One Capital Markets, Inc.
1 Bank One Plaza
Chicago, Illinois  60670

U.S. Bancorp Piper Jaffray Inc.
111 SW Fifth Avenue, Suite 1900
Portland, Oregon 97204

Dear Sirs:

          With reference to the issuance and sale from time-to-time by Northwest
Natural Gas Company (the "Company"), pursuant to the Distribution Agreement,
dated o, 2001 (the "Agreement"), between the Company and each of you, of not to
exceed $108,000,000 in aggregate principal amount of (i) the Company's First
Mortgage Bonds, designated Secured Medium-Term Notes, Series B (the "Secured
Notes") to be issued under the Company's Mortgage and Deed of Trust, dated as of
July 1, 1946, to Bankers Trust Company (the "Corporate Trustee") and R.G. Page
(Stanley Burg, successor), as trustees, as supplemented by twenty supplemental
indentures (such Mortgage and Deed of Trust, as so supplemented, being
hereinafter called the "Mortgage"), and (ii) the Company's Unsecured Medium-Term
Notes, Series B (the "Unsecured Notes"), to be issued under the Company's
Indenture, dated as of June 1, 1991 (the "Indenture"), to Bankers Trust Company,
as trustee (the "Indenture Trustee") (the Secured Notes and the Unsecured Notes
being hereinafter collectively referred to as the "Notes"), and the appointment
of each of you as agents of the Company pursuant to the Agreement for the





purposes of soliciting and receiving offers to purchase Notes, as agents, and
purchasing Notes, as principals, from the Company, please be advised that, as
General Counsel of the Company, I have participated in the preparation of or
reviewed (a) the Restated Articles of Incorporation, as amended, and Bylaws, as
amended, of the Company; (b) the Mortgage; (c) the Indenture; (d) the Agreement;
(e) the registration statement (File No. 333-64777) (the "Initial Registration
Statement"), filed by the Company with the Securities and Exchange Commission
(the "SEC") for the registration under the Securities Act of 1933, as amended
(the "1933 Act"), of $100,000,000 of the Notes, of which $8,000,000 remain
unsold, and for the qualification under the Trust Indenture Act of 1939, as
amended (the "Trust Indenture Act"), of the Mortgage and the Indenture, which
Initial Registration Statement became effective on October 16, 1998; (f) the
registration statement (File No. 333-o) (the "Subsequent Registration
Statement"), filed by the Company with the SEC for the registration under the
1933 Act of an additional $100,000,000 of the Notes, and for the qualification
under the Trust Indenture Act of the Mortgage and the Indenture, which
Subsequent Registration Statement became effective on o, 2001; (g) the combined
prospectus relating to the Notes constituting a part of the Subsequent
Registration Statement in the form in which the Subsequent Registration
Statement became effective, or if such combined prospectus has been amended or
supplemented subsequent to such effectiveness, as so amended and supplemented,
including the documents incorporated therein by reference pursuant to Item 12 of
Form S-3 (the "Prospectus"); (h) the proceedings before the Oregon Public
Utility Commission (the "OPUC") and the Washington Utilities and Transportation
Commission (the "WUTC") relating to the issuance and sale of the Notes; and (i)
the records of various corporate and other proceedings relating to the
authorization, issuance and sale of the Notes. I have also examined such other
documents and satisfied myself as to such other matters as I have deemed
necessary in order to render this opinion. I have not examined the Notes, except
specimens thereof.

          In preparation of this opinion, I have examined originals or
photostatic certified copies of such certificates, agreements, documents and
other papers, and have made such inquiries and investigations of law, as I
deemed appropriate and necessary for the opinion hereinafter set forth. In my
examination, I have assumed the authenticity of all documents submitted to me as
certified or photostatic copies and the authenticity of the originals of such
latter documents. As to certain matters of fact material to the opinion
expressed herein, I have relied upon certificates of various corporate officers
of the Company and public officials. I assume the accuracy of the material and
factual matters contained therein.

          I am of the opinion that:

          1. The Company is a validly organized and existing corporation in good
standing under the laws of the State of Oregon, is authorized to transact
business in the State of Washington, and has power (corporate and other) to own
its properties and conduct its business as described in the Prospectus.

          2. The Company holds valid and subsisting franchises, licenses,
permits and consents, free from burdensome restrictions and adequate for the
conduct of its business, as and to the extent set forth in the Prospectus.


                                     III-2



          3. The Agreement has been duly and validly authorized, executed and
delivered by the Company.

          4. The Mortgage and the Indenture have been duly and validly
authorized by all necessary corporate action, have been duly and validly
executed and delivered, and are valid and binding instruments enforceable in
accordance with their terms, subject, as to enforcement, to laws and principles
of equity relating to or affecting generally the enforcement of creditors
rights, including, without limitation, bankruptcy and insolvency.

          5. The Mortgage constitutes a first security interest on all of the
personal properties and fixtures owned by the Company that are described in the
Mortgage and are intended to be subject to the lien thereof, subject only to
Excepted Encumbrances (as defined in the Mortgage); and the description in the
Mortgage of such properties and fixtures is adequate to constitute the Mortgage
a security interest thereon.

          6. The Company has good and sufficient title to all of the real
properties owned by the Company that are described in the Mortgage and intended
to be subject to the lien thereof, subject only to Excepted Encumbrances (as
defined in the Mortgage) and to minor defects and irregularities of the nature
customarily found in properties of like size and character; the description in
the Mortgage of such properties is adequate to constitute the Mortgage a lien
thereon; and the Mortgage is a valid first mortgage lien on such properties,
subject to the exceptions noted above in this paragraph (6).

          7. The form of the Secured Notes has been duly authorized and has been
established in conformity with the provisions of the Mortgage; the form of the
Unsecured Notes bearing interest at a fixed rate, has been duly authorized and
has been established in conformity with the provisions of the Indenture; and the
form of the Unsecured Notes, bearing interest at a variable rate or not bearing
interest, when set forth in a Company Order or Orders (as defined in the
Indenture) or established by procedures acceptable to the Indenture Trustee
specified in a Company Order or Orders, will have been duly authorized and will
have been established in conformity with the provisions of the Indenture.

          8. The Secured Notes have been duly authorized by the resolutions
adopted by the Company's Board of Directors on May 27, 1993, September 26, 1996,
April 24, 1997, February 26, 1998 and April 27, 2000 (the "Board Resolutions"),
and when the terms of the Secured Notes shall have been determined as
contemplated by and in accordance with the Mortgage, the Board Resolutions and
written orders or instructions evidencing determinations by officers of the
Company, such terms will have been duly authorized by the Company and will have
been established in conformity with the terms of the Mortgage.

          9. The Unsecured Notes have been duly authorized by the Board
Resolutions, and when the terms of the Unsecured Notes shall have been
determined as contemplated by and in accordance with the Indenture, the Board
Resolutions and, to the extent required by the Indenture and the Board
Resolutions, by Officers' Certificates (as defined in the Indenture), Company
Orders and procedures acceptable to the Indenture Trustee specified in such
Company Orders, such terms will have been duly authorized by the Company and
will have been established in conformity with the terms of the Indenture.


                                     III-3



          10. The Notes, when (a) executed by the Company, (b) completed,
authenticated and delivered by the Corporate Trustee or the Indenture Trustee,
as the case may be, (c) issued and delivered by the Company and (d) paid for,
all as contemplated by and in accordance with the Mortgage, in the case of
Secured Notes, the Indenture, in the case of Unsecured Notes, the Board
Resolutions, and (to the extent required by the Mortgage or the Indenture and
the Board Resolutions) Officers' Certificates, Company Orders, procedures
acceptable to the Indenture Trustee specified in such Company Orders, written
orders or instructions evidencing determinations by the officers of the Company,
the Agreement, the Administrative Procedure (as defined in the Agreement), and
Terms Agreements (as defined in the Agreement), if any, will be duly issued
under the Mortgage or the Indenture, as the case may be, and will constitute
valid and legally binding obligations of the Company, entitled to the benefits
provided by the Mortgage or the Indenture, as the case may be, and enforceable
in accordance with their terms, subject, as to enforcement, to laws and
principles of equity relating to or affecting generally the enforcement of
creditors' rights, including, without limitation, bankruptcy and insolvency,
and, in the case of the Secured Notes, entitled to the benefit of the security
afforded by the Mortgage.

          11. The issuance and sale of the Notes, the compliance by the Company
with all of the provisions of the Notes, the Mortgage, the Indenture and the
Agreement and the consummation of the transactions contemplated by the Agreement
will not result in a breach or violation of any of the terms and provisions of,
or constitute a default under, any statute, any indenture, mortgage, deed of
trust or other agreement or instrument known to me to which the Company is a
party or by which it is bound or to which any of the property of the Company is
subject, the Company's Restated Articles of Incorporation, as amended, or
Bylaws, as amended, or any order, rule or regulation known to me of any court or
governmental agency or body having jurisdiction over the Company or any of its
properties.

          12. The OPUC has issued orders authorizing, and the WUTC has issued
orders establishing compliance with applicable statutory provisions with respect
to, the issuance and sale by the Company of the Notes; and no further approval,
authorization, consent or other order of any public board or body (other than in
connection or in compliance with the provisions of the securities or blue sky
laws of any jurisdiction) is legally required for the issuance and sale of the
Notes on the terms and conditions set forth in the Agreement.

          13. The statements of Oregon and Federal law (other than the 1933 Act,
the Securities Exchange Act of 1934 and the Trust Indenture Act), and legal
conclusions based thereon, contained in, or in the documents incorporated by
reference in, the Prospectus have been reviewed by me and are correct (except to
the extent that any statement contained in a document incorporated or deemed to
be incorporated by reference in the Prospectus may be deemed to be modified or
superseded in the Prospectus or in any other subsequently filed document which
also is or is deemed to be incorporated by reference in the Prospectus).

          14. Except as described in the Prospectus, there are no pending
material legal or governmental proceedings and, to my knowledge, no material
threatened legal or governmental proceedings, to which the Company is a party or
of which any of the property of the Company is subject, other than ordinary
routine litigation incidental to the kind of business conducted by the Company.


                                     III-4



          In the course of the preparation by the Company of the Initial and the
Subsequent Registration Statements and the Prospectus, I had conferences with
certain officers and employees of the Company, but I have made no independent
verification of the accuracy or completeness of the representations and
statements made to me by such person or the information included by the Company
in either of such Registration Statements and the Prospectus, and take no
responsibility therefor, except as set forth in paragraph 12 hereof. However, my
examination of such Registration Statements and the Prospectus and my
discussions in the above-mentioned conferences did not disclose to me any
information which gives me reason to believe that, when each of the Initial and
Subsequent Registration Statements became effective, it contained an untrue
statement of a material fact or omitted to state a material fact required to be
stated therein or necessary to make the statements therein not misleading, or
that, as of the date of this opinion, the Prospectus includes an untrue
statement of a material fact or omits to state a material fact necessary in
order to make the statements therein, in the light of the circumstances under
which they were made, not misleading; provided, that I do not express any belief
as to the financial statements or other financial or statistical data contained
in such Registration Statements or the Prospectus, or as to the Forms T-1 or
T-2, or as to any information contained therein furnished to the Company in
writing by any of you expressly for use therein.

          This opinion is limited to the facts and law at the date hereof. In
rendering the opinions set forth in paragraphs 10, 11 and 12 above, I have
necessarily assumed that, at the time of any issuance, sale and delivery of a
Note (i) the Board of Directors of the Company (or any committee thereof acting
pursuant to authority properly delegated to such committee by the Board of
Directors) has not taken any action to rescind or otherwise reduce its prior
authorization of the issuance of the Notes and an officer of the Company, as
stated in the resolutions of the Board of Directors (or any such committee)
relating to the Notes, has executed and delivered such Notes, (ii) the orders of
the OPUC and the WUTC with respect to the Notes remain in full force and effect
and have not been modified or amended by the OPUC or the WUTC, respectively, and
the Company complies with the terms of such orders, and (iii) the orders of the
SEC with respect to the Initial Registration Statement, the Subsequent
Registration Statement, the Mortgage and the Indenture remain in full force and
effect and have not been modified or amended by the SEC.

          I am a member of the bar of the State of Oregon and do not hold myself
out as an expert on the laws of the State of Washington, the State of New York
or Federal securities laws. Accordingly, in rendering this opinion, I have
relied, with your consent, as to certain matters of Washington law, upon the
opinion of even date herewith addressed to you by Stoel Rives LLP, special
Washington counsel to the Company, and, as to all matters governed by the laws
of the State of New York, the 1933 Act, the Securities Exchange Act of 1934 and
the Trust Indenture Act, upon the opinion of even date herewith addressed to you
by Thelen Reid & Priest LLP, New York, New York, counsel for the Company. In
rendering this opinion, I have made such reviews of the laws of the State of
Washington as I believe to be necessary to satisfy myself as to questions of
Washington law which are not addressed by the opinion of Stoel Rives LLP.

          You, the Trustees and, as to matters governed by the laws of the State
of Oregon, Thelen Reid & Priest LLP and your counsel may rely upon this opinion
in connection with the issuance and sale of the Notes. Neither you nor any of
them may rely upon this opinion for any other purpose, and no other person may


                                     III-5



rely upon this opinion for any purpose without, in each case, my prior written
consent.


                                        Very truly yours,


                                        Mark S. Dodson, Esq.


                                     III-6



                                                                        ANNEX IV

                    [Letterhead of Thelen Reid & Priest LLP]


                                             o, 2001


Merrill Lynch, Pierce, Fenner & Smith
   Incorporated
World Financial Center
North Tower
New York, New York 10281

UBS Warburg LLC
677 Washington Blvd.
Stamford, Connecticut 06901

Banc One Capital Markets, Inc.
1 Bank One Plaza
Chicago, Illinois  60670

U.S. Bancorp Piper Jaffray Inc.
111 SW Fifth Avenue, Suite 1900
Portland, Oregon 97204

Dear Sirs:

          With reference to the issuance and sale from time-to-time by Northwest
Natural Gas Company (the "Company"), pursuant to the Distribution Agreement,
dated o, 2001 (the "Agreement"), between the Company and each of you, of not to
exceed $108,000,000 in aggregate principal amount of (i) the Company's First
Mortgage Bonds, designated Secured Medium-Term Notes, Series B (the "Secured
Notes"), to be issued under the Company's Mortgage and Deed of Trust, dated as
of July 1, 1946, to Bankers Trust Company (the "Corporate Trustee") and R.G.
Page (Stanley Burg, successor), as trustees, as supplemented by twenty
supplemental indentures (such Mortgage and Deed of Trust, as so supplemented,
being hereinafter called the "Mortgage"), and (ii) the Company's Unsecured
Medium-Term Notes, Series B (the "Unsecured Notes"), to be issued under the
Company's Indenture, dated as of June 1, 1991 (the "Indenture"), to Bankers
Trust Company, as trustee (the "Indenture Trustee") (the Secured Notes and the
Unsecured Notes being hereinafter collectively referred to as the "Notes"), and
the appointment of each of you as agents of the Company pursuant to the
Agreement for the purposes of soliciting and receiving offers to purchase Notes,
as agents, and purchasing Notes, as principals, from the Company, please be
advised that, as counsel to the Company, we have participated in the preparation
of or reviewed (a) the Restated Articles of Incorporation, as amended, and
Bylaws, as amended, of the Company; (b) the Mortgage; (c) the Indenture; (d) the





Agreement; (e) the registration statement (File No. 333-64777) (the "Initial
Registration Statement"), filed by the Company with the Securities and Exchange
Commission (the "SEC") for the registration under the Securities Act of 1933, as
amended (the "1933 Act"), of $100,000,000 of the Notes, of which $8,000,000
remain unsold, and for the qualification under the Trust Indenture Act of 1939,
as amended (the "Trust Indenture Act"), of the Mortgage and the Indenture, which
Initial Registration Statement became effective on October 16, 1998; (f) the
registration statement (File No. 333-o) (the "Subsequent Registration
Statement"), filed by the Company with the SEC for the registration under the
1933 Act of an additional $100,000,000 of the Notes, and for the qualification
under the Trust Indenture Act of the Mortgage and the Indenture, which
Subsequent Registration Statement became effective on o, 2001; (g) the combined
prospectus relating to the Notes constituting a part of the Subsequent
Registration Statement in the form in which it became effective, or if such
combined prospectus has been amended or supplemented subsequent to such
effectiveness, as so amended or supplemented, including the documents
incorporated therein by reference pursuant to Item 12 of Form S-3 (the
"Prospectus"); (h) the records of the proceedings before the Oregon Public
Utility Commission (the "OPUC") and the Washington Utilities and Transportation
Commission (the "WUTC") relating to the issuance and sale of the Notes; and (i)
the records of various corporate and other proceedings relating to the
authorization, issuance and sale of the Notes. We have also examined such other
documents and satisfied ourselves as to such other matters as we have deemed
necessary in order to render this opinion. We have not examined the Notes,
except specimens thereof.

          In the preparation of this opinion, we have examined originals or
photostatic or certified copies of such certificates, agreements, documents and
other papers, and have made such inquiries and investigations of law, as we
deemed appropriate and necessary for the opinion hereinafter set forth. In our
examination, we have assumed the authenticity of all documents submitted to us
as originals, the conformity to original documents of all documents submitted to
us as certified or photostatic copies and the authenticity of the originals of
such latter documents. As to certain matters of fact material to the opinion
expressed herein, we have relied upon certificates of various corporate officers
of the Company and public officials. We assume the accuracy of the material and
factual matters contained therein.

          We are of the opinion that:

          1. The Company is a validly organized and existing corporation in good
standing under the laws of the State Of Oregon, and is authorized to transact
business in the State of Washington.

          2. The Agreement has been duly and validly authorized, executed and
delivered by the Company.

          3. The Mortgage and the Indenture have been duly and validly
authorized by all necessary corporate action, have been duly and validly
executed and delivered, have been duly qualified under the Trust Indenture Act,
and are valid and binding instruments enforceable in accordance with their
terms, subject, as to enforcement, to laws and principles of equity relating to
or affecting generally the enforcement of creditors' rights, including, without
limitation, bankruptcy and insolvency.


                                      IV-2



          4. The form of the Secured Notes has been duly authorized and has been
established in conformity with the provisions of the Mortgage and conforms to
the description thereof contained in the Prospectus; the form of the Unsecured
Notes, bearing interest at a fixed rate, has been duly authorized and has been
established in conformity with the provisions of the Indenture and conforms to
the description thereof contained in the Prospectus; and the form of the
Unsecured Notes, bearing interest at a variable rate or not bearing interest,
when set forth in a Company Order or Orders (as defined in the Indenture) or
established by procedures acceptable to the Indenture Trustee specified in a
Company Order or Orders, will have been duly authorized and will have been
established in conformity with the provisions of the Indenture.

          5. The Secured Notes have been duly authorized by the resolutions
adopted by the Company's Board of Directors on May 27, 1993, September 26, 1996,
April 24, 1997, February 26, 1998 and April 27, 2000 (the "Board Resolutions"),
and when the terms of the Secured Notes shall have been determined as
contemplated by and in accordance with the Mortgage, the Board Resolutions and
written orders or instructions evidencing determinations by Officers of the
Company, such terms will have been duly authorized by the Company and will have
been established in conformity with the terms of the Mortgage.

          6. The Unsecured Notes have been duly authorized by the Board
Resolutions, and when the terms of the Unsecured Notes shall have been
determined as contemplated by and in accordance with the Indenture, the Board
Resolutions and, to the extent required by the Indenture and the Board
Resolutions, by Officers' Certificates (each, as defined in the Indenture),
Company Orders and procedures acceptable to the Indenture Trustee specified in
such Company Orders, such terms will have been duly authorized by the Company
and will have been established in conformity with the terms of the Indenture.

          7. The Notes, when (a) executed by the Company, (b) completed,
authenticated and delivered by the Corporate Trustee or the Indenture Trustee,
as the case may be, (c) issued and delivered by the Company and (d) paid for,
all as contemplated by and in accordance with the Mortgage, in the case of the
Secured Notes, the Indenture, in the case of Unsecured Notes, the Board
Resolutions, and (to the extent required by the Mortgage or the Indenture and
the Board Resolutions) Officers' Certificates, Company Orders, procedures
acceptable to the Indenture Trustee specified in such Company Orders, written
orders or instructions evidencing determinations by the officers of the Company,
the Agreement, the Administrative Procedure (as defined in the Agreement) and
Terms Agreements (as defined in the Agreement), if any, will be duly issued
under the Mortgage or the Indenture, as the case may be, and will constitute
valid and legally binding obligations of the Company, entitled to the benefits
provided by the Mortgage or the Indenture, as the case may be, and enforceable
in accordance with their terms, subject, as to enforcement, to laws and
principles of equity relating to or affecting generally the enforcement of
creditors' rights, including, without limitation, bankruptcy and insolvency,
and, in the case of the Secured Notes, entitled to the benefit of the security
afforded by the Mortgage.

          8. The issuance and sale of the Notes, the compliance by the Company
with all of the provisions of the Notes, the Mortgage, the Indenture and the
Agreement and the consummation of the transactions contemplated by the Agreement
will not result in a breach or violation of any of the terms and provisions of,


                                      IV-3



or constitute a default under, the Mortgage and the Indenture or the Company's
Restated Articles of Incorporation, as amended, or Bylaws, as amended.

          9. The OPUC has issued orders authorizing, and the WUTC has issued
orders establishing compliance with applicable statutory provisions with respect
to, the issuance and sale by the Company of the Notes; and no further approval,
authorization, consent or other order of any public board or body (other than in
connection or in compliance with the provisions of the securities or blue sky
laws of any jurisdiction) is legally required for the issuance and sale of the
Notes through each of you, as agent, on the terms and conditions set forth in
the Agreement.

          10. Both the Initial and Subsequent Registration Statements have
become effective under the 1933 Act, and, to the best of our knowledge, no stop
order suspending the effectiveness thereof has been issued and no proceedings
for that purpose are pending before or have been proposed by the SEC; the
Mortgage and the Indenture have been duly qualified under the Trust Indenture
Act; each of the Initial and Subsequent Registration Statements at the time it
became effective complied, and the Prospectus (excluding the documents
incorporated therein by reference) as of the date of this opinion complies, as
to form, in all material respects with the requirements of the 1933 Act, the
Trust Indenture Act (except with respect to the Forms T-1 and Form T-2, upon
which we do not pass) and the rules and regulations of the SEC thereunder; and
the documents incorporated by reference in the Prospectus pursuant to Item 12 of
Form S-3 (other than the financial statements and other financial or statistical
data contained therein, upon which we express no opinion), as of their
respective dates of filing, complied as to form in all material respects with
the requirements of the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), and the rules and regulations of the SEC thereunder.

          In the course of the preparation by the Company of the Initial and the
Subsequent Registration Statements and the Prospectus, we had conferences with
certain officers and employees of the Company, with the General Counsel for the
Company and with you and your counsel, but we made no independent verification
of the accuracy or completeness of the representations and statements made to us
by such persons or the information included by the Company in either of such
Registration Statements and the Prospectus and take no responsibility therefor,
except insofar as set forth in paragraph 4 hereof. In passing upon the forms of
such Registration Statements and the Prospectus we have, therefore, assumed the
accuracy and completeness of such representations, statements and information,
except as aforesaid. However, our examination of such Registration Statements
and the Prospectus and our discussions in the above-mentioned conferences did
not disclose to us any information which gives us reason to believe that, when
each of the Initial and the Subsequent Registration Statements became effective,
it contained an untrue statement of a material fact or omitted to state a
material fact required to be stated therein or necessary to make the statements
therein not misleading, or that, as of the date of this opinion, the Prospectus
includes an untrue statement of a material fact or omits to state a material
fact necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading; provided, that we do
not express any belief as to the financial statements or other financial or
statistical data contained in such Registration Statements or the Prospectus, or
as to the Forms T-1 or T-2, or as to any information contained therein furnished
to the Company in writing by any of you expressly for use therein.


                                      IV-4



          This opinion is limited to the facts and law at the date hereof. In
rendering the opinions set forth in paragraphs 7 and 9 above, we have
necessarily assumed that, at the time of any issuance, sale and delivery of a
Note (i) the Board of Directors of the Company (or any committee thereof acting
pursuant to authority properly delegated to such committee by the Board of
Directors) has not taken any action to rescind or otherwise reduce its prior
authorization of the issuance of the Notes and an officer of the Company, as
stated in the resolutions of the Board of Directors (or any such committee)
relating to the Notes, has executed and delivered such Notes, (ii) the orders of
the OPUC and the WUTC with respect to the Notes remain in full force and effect
and have not been modified or amended by the OPUC or the WUTC, respectively, and
the Company complies with the terms of such orders and (iii) the orders of the
SEC with respect to the Initial Registration Statement, the Subsequent
Registration Statement, the Mortgage and the Indenture remain in full force and
effect and have not been modified or amended by the SEC.

          We are members of the bar of the State of New York and do not hold
ourselves out as experts on the laws of the State of Oregon or the State of
Washington. Accordingly, in rendering this opinion, we have relied, with your
consent, as to all matters governed by the laws of the State of Oregon, upon the
opinion of even date herewith addressed to you by Mark S. Dodson, Esq., General
Counsel of the Company, and, as to all matters governed by the laws of the State
of Washington, upon the opinion of Stoel Rives LLP, special Washington counsel
to the Company. We understand that you are relying upon the opinions of Mark S.
Dodson, Esq., and Stoel Rives LLP as to all matters governed by the laws of the
State of Oregon and Washington, as the case may be, including titles to property
and franchises and the lien of the Mortgage, upon which we do not pass.

          You, the Trustees, and as to matters governed by the laws of the State
of New York and the 1933 Act, the Exchange Act and the Trust Indenture Act, Mark
S. Dodson, Esq., may rely upon this opinion in connection with the issuance and
sale of the Notes. Neither you nor any of them may rely upon this opinion for
any other purpose, and no other person may rely upon this opinion for any
purpose without, in each case, our prior written consent.

                                        Very truly yours,


                                        THELEN REID & PRIEST LLP


                                      IV-5



                                                                         ANNEX V

                         [Letterhead of Stoel Rives LLP]


                                             o, 2001


Merrill Lynch, Pierce, Fenner
   & Smith Incorporated
World Financial Center
North Tower
New York, New York  10281

UBS Warburg LLC
677 Washington Blvd.
Stamford, Connecticut 06901

Banc One Capital Markets, Inc.
1 Bank One Plaza
Chicago, Illinois  60670

U.S. Bancorp Piper Jaffray Inc.
111 SW Fifth Avenue, Suite 1900
Portland, Oregon 97204

Dear Sirs:

          With reference to the issuance and sale from time-to-time by Northwest
Natural Gas Company (the "Company"), pursuant to the Distribution Agreement,
dated o, 2001 (the "Agreement"), between the Company and each of you, of not to
exceed $108,000,000 in aggregate principal amount of (i) the Company's First
Mortgage Bonds, designated Secured Medium-Term Notes, Series B (the "Secured
Notes") to be issued under the Company's Mortgage and Deed of Trust, dated as of
July 1, 1946, to Bankers Trust Company (the "Corporate Trustee") and R.G. Page
(Stanley Burg, successor), as trustees, as supplemented by twenty supplemental
indentures (such Mortgage and Deed of Trust, as so supplemented, being
hereinafter called the "Mortgage"), and (ii) the Company's Unsecured Medium-Term
Notes, Series B (the "Unsecured Notes"), to be issued under the Company's
Indenture, dated as of June 1, 1991 (the "Indenture"), to Bankers Trust Company,
as trustee (the "Indenture Trustee") (the Secured Notes and the Unsecured Notes
being hereinafter collectively referred to as the "Notes"), and the appointment
of each of you as agents of the Company pursuant to the Agreement for the
purposes of soliciting and receiving offers to purchase Notes, as agents, and
purchasing Notes, as principals, from the Company, please be advised that, as
special Washington counsel to the Company, we have reviewed (a) the Mortgage;
(b) the Indenture; (c) the Agreement; and (d) the proceedings before the





Washington Utilities and Transportation Commission (the "WUTC") relating to the
issuance and sale of the Notes. We have also examined such other documents and
satisfied ourselves as to such other matters as we have deemed necessary in
order to render this opinion. We have not examined the Notes, except for forms
thereof.

          In preparation of this opinion, we have examined originals or
photostatic copies of such certificates, agreements, documents and other papers,
and have made such inquiries and investigations of law, as we deemed appropriate
and necessary for the opinion hereinafter set forth. In our examination, we have
assumed the authenticity of all documents submitted to us as certified or
photostatic copies and the authenticity of the originals of such latter
documents. We have also assumed that the Mortgage, the Indenture and the
Agreement have been duly authorized, executed and delivered by, and are legally
binding on, each of the parties thereto.

As to certain matters of fact material to the opinion expressed herein, we have
relied upon certificates of various corporate officers of the Company and public
officials. We assume the accuracy of the material and factual matters contained
therein.

          Based upon the foregoing and subject to the following qualifications,
we are of the opinion that:

          1. The Company is authorized to transact business in the State of
Washington.

          2. The Mortgage constitutes a first security interest on all of the
personal properties and fixtures owned by the Company in the State of Washington
that are described in the Mortgage and are intended to be subject to the lien
thereof, subject only to Excepted Encumbrances (as defined in the Mortgage); and
the description in the Mortgage of such properties and fixtures is adequate to
constitute the Mortgage a security interest thereon.

          3. The Company has good and sufficient title to all of the real
properties owned by the Company in the State of Washington that are described in
the Mortgage and intended to be subject to the lien thereof, subject only to
Excepted Encumbrances (as defined in the Mortgage) and to minor defects and
irregularities of the nature customarily found in properties of like size and
character; the description in the Mortgage of such properties is adequate to
constitute the Mortgage a lien thereon; and the Mortgage is a valid first
mortgage lien on such properties, subject to the exceptions noted above in this
paragraph (3).

          4. The issuance and sale of the Notes, the compliance by the Company
with all of the provisions of the Notes, the Mortgage, the Indenture and the
Agreement and the consummation of the transactions contemplated by the Agreement
will not violate any law, rule or regulation of the State of Washington or any
political subdivision thereof known to us to be applicable to the Company.

          5. The WUTC has issued orders dated June 25, 1998 in Docket UG-980812,
as supplemented by the First Supplemental Order dated May 30, 2000, and dated
August 30, 2000 in docket UG-001261 establishing compliance with applicable
statutory provisions with respect to the issuance and sale by the Company of the
Notes; and under the laws of the State of Washington, no further approval,
authorization, consent or other order of any public board or body is legally


                                      V-2



required for the issuance and sale of the Notes through each of you, as agent,
on the terms and conditions set forth in the Agreement.

          This opinion is limited to the facts and law at the date hereof. In
rendering the opinions set forth in paragraphs 4 and 5 above, we have
necessarily assumed that, at the time of any issuance, sale and delivery of a
Note (i) the Board of Directors of the Company (or any committee thereof acting
pursuant to authority properly delegated to such committee by the Board of
Directors) has not taken any action to rescind or otherwise reduce its prior
authorization of the issuance of the Notes and an officer of the Company, as
stated in the resolutions of the Board of Directors (or any such committee)
relating to the Notes, has executed and delivered such Notes and (ii) the orders
of the WUTC with respect to the Notes remain in full force and effect and have
not been modified or amended by the WUTC and the Company complies with the terms
of such orders.

          We are members of the bar of the State of Washington and do not
express any opinion herein concerning any laws other than the laws of the State
of Washington.

          In giving the foregoing opinions, we express no opinion as to the
securities or blue sky laws of any jurisdiction.

          You, the Trustees, Mark S. Dodson, Esq., General Counsel of the
Company, Thelen Reid & Priest LLP, counsel to the Company, and your counsel, as
to matters governed by the laws of the State of Washington, may rely upon this
opinion in connection with the issuance and sale of the Notes. Neither you nor
any of them may rely upon this opinion for any other purpose, and no other
person may rely upon this opinion for any purpose without, in each case, our
prior written consent.

                                        Very truly yours,


                                        Stoel Rives LLP


                                      V-3



                                                                        ANNEX VI

             [Contents of Letter of Independent Public Accountants]

          The letter of each independent public accountant will state in effect
that, for the periods during which such firm was the independent public
accountant for the Company:

          1. They are independent public accountants with respect to the Company
within the meaning of the Act and the applicable published Rules and
Regulations;

          2. In their opinion, the financial statements examined by them and
incorporated by reference in the Registration Statement comply as to form in all
material respects with the applicable accounting requirements of the Exchange
Act and the published rules and regulations thereunder;

          3. On the basis of limited procedures, not constituting an examination
made in accordance with generally accepted auditing standards, including a
reading of the latest available interim financial statements of the Company, if
any, a reading of the minute books of the Company since December 31, 19__,
inquiries of officials of the Company responsible for financial and accounting
matters and such other inquiries and procedures as may be specified in such
letter, nothing came to their attention that caused them to believe that:

               (a)(1) the latest interim consolidated financial statements
     included or incorporated by reference in the Registration Statement do not
     comply as to form in all material respects with the applicable accounting
     requirements of the Exchange Act and the published rules and regulations
     thereunder as they apply to Form 10-Q or (2) said interim consolidated
     financial statements are not in conformity with generally accepted
     accounting principles applied on a basis substantially consistent with that
     of the audited consolidated financial statements incorporated by reference
     in the Registration Statement;

               (b) at the date of the latest available interim balance sheet of
     the Company and at a subsequent specified date not more than five days
     prior to the Time of Delivery, there has been any change in the capital
     stock (except for (i) shares of the Company's Common Stock issued under the
     Company's Dividend Reinvestment Plan, 1985 Stock Option Plan or Employee
     Stock Purchase Plan, (ii) shares of Common Stock issued upon the conversion
     of shares of the Company's Convertible Debentures, (iii) shares of Common
     Stock repurchased pursuant to the Company's Repurchase Program, and (iv)
     shares of Preferred Stock purchased or redeemed pursuant to or in
     anticipation of sinking and purchase funds with respect to the Company's
     Preferred Stock) or any increase in the long-term debt of the Company, or
     any decrease in net assets, in each case as compared with amounts shown in
     the balance sheet as of the date of the latest financial statements
     incorporated by reference in the Registration Statement, except in each
     case for changes, increases or decreases which the Registration Statement
     discloses have occurred or may occur, which were occasioned by the
     declaration of dividends or which are described in such letter; or

               (c) for the latest period for which financial information is
     available subsequent to the latest financial statements included or
     incorporated by reference in the Prospectus, there were any decreases in





     operating revenues, net income and earnings available for common stock, as
     compared to the corresponding period in the prior year, except in each case
     for decreases which the Registration Statement discloses have occurred or
     may occur, which were occasioned by the declaration of dividends or which
     are described in such letter; and

          4. They have performed certain other specified procedures with respect
to certain amounts and percentages set forth in the Registration Statement or in
the documents incorporated by reference therein, as have been requested by your
counsel and approved by the Company, and have found them to be in agreement with
the records of the Company and the computations to be arithmetically correct.


                                      VI-2



                                                                       EXHIBIT 1

                          NORTHWEST NATURAL GAS COMPANY

                                  $108,000,000

                           MEDIUM-TERM NOTES, SERIES B


                                                                          ,
                                                                  --------  ----

Merrill Lynch, Pierce, Fenner & Smith
  Incorporated
World Financial Center
North Tower
New York, New York  10281

UBS Warburg LLC
677 Washington Blvd.
Stamford, Connecticut 06901

Banc One Capital Markets, Inc.
1 Bank One Plaza
Chicago, Illinois  60670

U.S. Bancorp Piper Jaffray Inc.
111 SW Fifth Avenue, Suite 1900
Portland, Oregon 97204

[Insert Names of Additional Existing Agents, if any]

[Insert Name of New Agent]

Dear Sirs:

     Reference is hereby made to the Distribution Agreement, dated o, 2001 (the
"Distribution Agreement"), a copy of which has previously been delivered to you,
between Northwest Natural Gas Company, an Oregon corporation (the "Company"),
and each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, UBS Warburg LLC,
Banc One Capital Markets, Inc., U.S. Bancorp Piper Jaffray Inc. and [Insert
Names of Additional Existing Agents, if any], with respect to the issue and sale
by the Company of its First Mortgage Bonds, designated Secured Medium-Term
Notes, Series B, and its Unsecured Medium-term Notes, Series B (collectively,
the "Securities"). Capitalized terms used herein without definition shall have
the meanings assigned to them in the Distribution Agreement.

     Subject to the terms and conditions set forth in the Distribution
Agreement, the Company hereby appoints [Insert Name of New Agent] as agent of
the Company for the purpose of soliciting and receiving offers to purchase the
Securities. In connection with such appointment, [Insert Name of New Agent] is





hereby entitled to the benefits and subject to the duties of an Agent under the
terms and conditions of the Distribution Agreement (including the Administrative
Procedures) and by its execution hereof is hereby made a party to the
Distribution Agreement. In connection with such appointment, [Insert Name of New
Agent] shall receive as of the date hereof: [To be agreed upon by the Company
and the New Agent]

     Any communication under the Distribution Agreement will be made in
accordance with Section 12 of the Distribution Agreement, and if to [Insert Name
of New Agent] shall be sufficient in all respects when delivered or sent by
facsimile transmission or registered mail to [Insert Address of New Agent],
attention: [Insert Name], facsimile transmission number [Insert New Agent
Number].

     This Agreement may be executed in any number of counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

     If the foregoing correctly sets forth our agreement, please indicate your
acceptance hereof in the space provided for that purpose below.

                                        Very truly yours,

                                        Northwest Natural Gas Company

                                        By:
                                           ------------------------------------
                                        Title:  Senior Vice President, Finance,
                                        and Chief Financial Officer


The foregoing Agreement is hereby
confirmed and accepted as of the
date hereof.


[INSERT NAME OF NEW AGENT]


By:
   ------------------------------------


Title:
      ---------------------------------


                                       2