Exhibit 4(d)


                                OFFICERS' CERTIFICATE

            SUPPLEMENTAL TO THE OFFICERS' CERTIFICATE DATED JUNE 18, 1993
                    (UNDER SECTIONS 201 AND 301 OF THE INDENTURE 
                  REFERRED HEREIN OF NORTHWEST NATURAL GAS COMPANY)

                    Pursuant to Sections 201 and 301 of the Indenture,
          dated as of June 1, 1991 (the "Indenture"), from Northwest
          Natural Gas Company (the "Company") to Bankers Trust Company, as
          trustee (the "Trustee"), and pursuant to the resolutions of the
          Company's Board of Directors, dated May 27, 1993 (the "Board
          Resolution"), we, Bruce R. DeBolt and C. J. Rue, the Senior Vice
          President and Secretary, respectively, of the Company do hereby
          certify that:

                    1.   The terms of the Company's Unsecured Medium-Term
          Notes, Series B (the "Notes") have been established pursuant to
          Sections 201 and 301 of the Indenture in the Officers'
          Certificate dated June 18, 1993, unless otherwise provided in
          subsequent Officers' Certificates;

                    2.   The Notes shall, in the case of Notes bearing
          interest at a fixed rate, be in substantially the form set forth
          in Exhibit 1 hereto; and

                    3.   Pursuant to the Board Resolution, the following
          additional terms are hereby added for the benefit of the Holders
          of the Notes:

                         If the Company shall make any deposit of money
               and/or Government Obligations with respect to the Notes, or
               any portion of the principal amount thereof, prior to the
               Maturity or redemption of such Notes or such portion of the
               principal amount thereof, for the satisfaction or discharge
               of the indebtedness of the Company in respect to such Notes
               or such portion thereof as contemplated by Section 701 of
               the Indenture, the Company shall deliver to the Trustee
               either:

                         (A) an instrument wherein the Company,
               notwithstanding such satisfaction and discharge, shall
               assume the obligation (which shall be absolute and
               unconditional) to irrevocably deposit with the Trustee such
               additional sums of money, if any, or additional Government
               Obligations (meeting requirements of Section 701 of the
               Indenture), if any, or any combination thereof, at such time
               or times, as shall be necessary, together with the money
               and/or Government Obligations theretofore so deposited, to
               pay when due the principal of and premium, if any, and
               interest due and to become due on such Notes or such
               portions thereof, all in accordance with and subject to the
               provisions of said Section 701; provided, however, that such
               instrument may state that the obligation of the Company to
               make additional deposits as aforesaid shall be subject to
               the delivery to the Company by the Trustee of a notice
               asserting the amount of such deficiency accompanied by an
               opinion of an independent public accountant of nationally
               recognized standing, selected by the Trustee, showing the
               calculation thereof; or

                         (B) an Opinion of Counsel to the effect that the
               Holders of such Notes, or such portions of the principal
               amount thereof, will not recognize income, gain or loss for
               United States federal income tax purposes as a result of
               such satisfaction and discharge and will be subject to
               United States federal income tax on the same amounts, at the
               same times and in the same manner as if such satisfaction
               and discharge had not been effected.


               IN WITNESS WHEREOF, we have hereunto signed our names this
          ___ day of ____, 1997.

                                                                            
                                             ____________________________
                                                 Senior Vice President

                                             ____________________________
                                                       Secretary
      

                                                      Exhibit 1 to
                                                      Officers' Certificate


          Unless   this  certificate   is   presented   by  an   authorized
          representative  of  The  Depository  Trust Company,  a  New  York
          corporation ("DTC"), to Issuer or its agent for registration of  
          transfer, exchange, or payment, and  any certificate issued  is 
          registered in the  name of Cede & Co.  or  in  such  other  name  
          as  requested  by  an  authorized representative  of DTC (and any 
          payment is  made to Cede & Co. or to  such   other  entity  as   
          is  requested  by   an  authorized representative of DTC), ANY 
          TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE  
          BY OR TO ANY PERSON IS  WRONGFUL inasmuch as  the  registered 
          owner  hereof, Cede  &  Co., has  an interest herein.

          Registered No.                        Registered Principal Amount
                                                $





                            NORTHWEST NATURAL GAS COMPANY
                         UNSECURED MEDIUM-TERM NOTE, SERIES B

               CUSIP:                             Redeemable:  Yes   No
                                                                  --   --

               Interest Commencement Date:        In Whole:  Yes   No
                                                                --   --

               Interest Rate:                     In Part:   Yes   No  
                                                                --   --

               Stated Maturity Date:              Initial Redemption Date:

               Other Provisions:                  Redemption Limitation Date:

                                                  Initial Redemption Price:

                                                  Reduction Percentage:

                    NORTHWEST  NATURAL  GAS  COMPANY,  a  corporation  duly
          organized  and existing  under the  laws of  the State  of Oregon
          (herein called  the "Company", which term  includes any successor
          corporation  under  the  Indenture  referred to  on  the  reverse
          hereof), for value  received, hereby  promises to pay  to CEDE  &
          Co., or registered assigns,  the principal amount specified above
          on  the Stated Maturity Date specified above, and to pay interest
          thereon from  the Interest  Commencement Date specified  above or
          from  the most recent Interest Payment Date to which interest has
          been  paid or duly provided for, semi-annually in arrears on June
          1 and December 1 in each year,  commencing (except as provided in
          the following sentence) with the Interest Payment Date next  suc-
          ceeding the  Interest Commencement  Date specified above,  at the
          Interest  Rate per  annum  specified above,  until the  principal
          hereof shall have  been paid or duly provided for.   The interest
          so  payable, and  punctually paid  or duly  provided for,  on any
          Interest  Payment Date, as  provided in such  Indenture, shall be
          paid to  the Person in whose  name this Security (or  one or more
          Predecessor Securities)  shall have been registered  at the close
          of  business  on the  Regular Record  Date  with respect  to such
          Interest Payment Date, which  shall be the May 15 or  November 15
          (whether  or not  a  Business Day),  as  the  case may  be,  next
          preceding such Interest Payment Date; provided, however, that, if
          the  Interest Commencement Date of this Security shall be after a
          Regular Record Date and before the corresponding Interest Payment
          Date, payment of  interest shall commence on the  second Interest
          Payment Date succeeding such Interest Commencement Date and shall
          be paid to the Person in whose name this Security  was registered
          on the Regular Record Date for such second Interest Payment Date;
          and  provided,  further,  that  interest payable  on  the  Stated
          Maturity Date specified above shall be paid to the Person to whom
          principal shall be  paid.   Any such interest  not so  punctually
          paid or duly provided for shall forthwith cease to  be payable to
          the  Holder on  such Regular  Record  Date and  shall be  paid as
          provided in said Indenture.

          

                                       -2-

                    Payment of the  principal of, and premium,  if any, and
          interest on, this Security shall be made at  the office or agency
          of  the Company  maintained for  such purpose  in the  Borough of
          Manhattan,  The City  of  New York,  New  York, in  such  coin or
          currency  of the  United States  of  America as  at  the time  of
          payment shall be legal  tender for payment of public  and private
          debts; provided,  however, that, at  the option  of the  Company,
          payment of interest may be made by check mailed to the address of
          the Person entitled thereto  as such address shall appear  in the
          Security   Register;  and  provided   further,  that  payment  of
          principal, and  premium,  if any,  and interest,  payable on  the
          Stated Maturity  Date specified above or upon  redemption, at the
          request of the  Holder, will be made at said  office or agency in
          immediately available funds upon presentation of this Security.

                    This  Security is  one  of a  duly authorized  issue of
          securities  of  the  Company  (herein  called the  "Securities"),
          issued and issuable  in one  or more series  under an  Indenture,
          dated  as of June 1, 1991 (such Indenture, as originally executed
          and  delivered  and  as   thereafter  supplemented  and  amended,
          together  with any constituent instruments establishing the terms
          of particular Securities,  being herein called the  "Indenture"),
          from the  Company to  Bankers Trust  Company, as  trustee (herein
          called the  "Trustee", which term includes  any successor trustee
          under the Indenture), to which Indenture reference is hereby made
          for  a statement of the respective rights, limitations of rights,
          duties and immunities  thereunder of the Company, the Trustee and
          the Holders  of the Securities  and of  the terms upon  which the
          Securities have  been, and will be,  authenticated and delivered.
          The acceptance of this Security shall be deemed to constitute the
          consent and  agreement by the Holder  hereof to all  of the terms
          and provisions of  the Indenture.   This Security  is one of  the
          series designated on the face hereof.

                    If any  Interest Payment  Date, any Redemption  Date or
          the  Stated Maturity Date shall not be a Business Day, payment of
          the amounts due on this Security on such date may be made on  the
          next  succeeding Business Day;  and no  interest shall  accrue on
          such  amounts for the period from and after such Interest Payment
          Date, Redemption Date or Stated Maturity Date, as the case may be.

                    If  so specified  above,  this Security  is subject  to
          redemption  at any time on  or after the  Initial Redemption Date
          specified above,  as a whole or, if so specified, in part, at the
          election  of the Company, at  the applicable redemption price (as
          described in the following sentence) plus accrued interest to the
          date  fixed for redemption.   Such redemption price  shall be the
          Initial  Redemption  Price specified  above for  the twelve-month
          period  commencing  on  the  Initial Redemption  Date  and  shall
          decline  for   the   twelve-month  period   commencing  on   each
          anniversary of the  Initial Redemption  Date by  a percentage  of
          principal  amount equal  to  the Reduction  Percentage  specified
          above until such redemption price is 100% of the principal amount
          of this Security to be redeemed.

                    Notwithstanding the  foregoing,  the Company  may  not,
          prior to the Redemption Limitation Date, if any, specified above,
          redeem  this Security as contemplated  above as a  part of, or in
          anticipation  of, any  refunding  operation by  the  application,
          directly or  indirectly, of  moneys borrowed having  an effective
          interest  cost  to the  Company  (calculated  in accordance  with
          generally accepted financial practice) of less than the effective
          interest  cost  to the  Company  (similarly  calculated) of  this
          Security.

                    Notice of redemption shall be given by mail to  Holders
          of Securities, not less than 30  days nor more than 90 days prior
          to  the date  fixed  for  redemption,  all  as  provided  in  the
          Indenture.  As provided in the Indenture, notice of redemption as
          aforesaid  may state  that such  redemption shall  be conditional
          upon the  receipt by the Trustee  of money sufficient to  pay the
          Redemption Price of, and  interest, if any, on, this  Security on
          or prior  to the  date fixed  for such redemption.   A  notice of
          redemption so conditioned shall be of no force or effect if  such
          money is not so received;  and, in such event, the  Company shall
          not be required to redeem this Security.

                    The Company shall not  be required to (a)  register the
          transfer of  or exchange Securities  of this  series and  Tranche
          during a period of 15 days immediately preceding the selection of

          

                                       -3-

          Securities of this series and Tranche to be called for redemption
          or (b)  issue, register the  transfer of  to  exchange any
          Security so selected for redemption, in whole or in part, except
          the unredeemed portion of any Security being redeemed in part.

                    In the  event of  redemption of  this Security  in part
          only, a new Security or Securities  of this series and Tranche of
          authorized  denominations,  of   like  tenor  and  in   aggregate
          principal amount equal  to the unredeemed portion hereof  will be
          issued in  the name of  the Holder hereof  upon the surrender  of
          this Security.

                    The Indenture contains provisions for defeasance at any
          time of  the entire indebtedness of this Security upon compliance
          with certain conditions set forth in the Indenture.

                    If an  Event of Default  with respect to  Securities of
          this series shall occur  and be continuing, the principal  of the
          Securities of this series may be declared due  and payable in the
          manner and with the effect provided in the Indenture.

                    The  Indenture  permits,  with  certain  exceptions  as
          therein  provided,   the  Trustee  to  enter  into  one  or  more
          supplemental indentures for the  purpose of adding any provisions
          to,  or  changing  in  any  manner  or  eliminating  any  of  the
          provisions of, the Indenture  with the consent of the  Holders of
          not less than  a majority  in aggregate principal  amount of  the
          Securities of  all series  then Outstanding under  the Indenture,
          considered as one  class; provided, however, that  if there shall
          be Securities  of  more than  one  series Outstanding  under  the
          Indenture and if a proposed supplemental indenture shall directly
          affect  the rights of the  Holders of Securities  of one or more,
          but less than all, of  such series, then the consent only  of the
          Holders  of  a  majority in  aggregate  principal  amount of  the
          Outstanding  Securities  of  all  series  so  directly  affected,
          considered  as  one  class,  shall  be  required;  and  provided,
          further, that if  the Securities  of any series  shall have  been
          issued  in more than one Tranche and if the proposed supplemental
          indenture shall  directly  affect the  rights of  the Holders  of
          Securities of one  or more, but less than all,  of such Tranches,
          then the consent only of  the Holders of a majority in  aggregate
          principal amount of the Outstanding Securities of all Tranches so
          directly affected,  considered as  one class, shall  be required.
          The Indenture also contains  provisions permitting the Holders of
          specified percentages  in principal  amount of the  Securities of
          any  series then  Outstanding, on  behalf of  the Holders  of all
          Securities of  such series,  to waive  compliance by  the Company
          with  certain  provisions  of  the  Indenture  and  certain  past
          defaults under the  Indenture and their  consequences.  Any  such
          consent  or  waiver  by the  Holder  of  this  Security shall  be
          conclusive  and binding  upon  such Holder  and  upon all  future
          Holders  of this  Security and  of any  Security issued  upon the
          registration of  transfer hereof or  in exchange  therefor or  in
          lieu hereof, whether or not notation of such consent or waiver is
          made upon this Security.

                    No reference  herein to the Indenture  and no provision
          of this Security or  of the Indenture  shall alter or impair  the
          obligation of  the Company, which is  absolute and unconditional,
          to  pay the principal of, and premium,  if any, and interest, on,
          this  Security at  the  times, place  and rate,  in  the coin  or
          currency, and in the manner, herein prescribed.

                    As  provided in  the Indenture  and subject  to certain
          limitations therein set  forth, the transfer of  this Security is
          registrable  in the  Security  Register, upon  surrender of  this
          Security  for registration  of  transfer at  the Corporate  Trust
          Office of  the Trustee or such  other office or agency  as may be
          designated  by the  Company for  such purpose  in the  Borough of
          Manhattan, The City of New  York, New York, duly endorsed  by, or
          accompanied  by   a  written  instrument  of   transfer  in  form
          satisfactory  to  the Company  and  the  Security Registrar  duly
          executed by, the Holder hereof or his attorney duly authorized in
          writing,  and, thereupon,  one  or more  new  Securities of  this
          series and Tranche of authorized denominations and  of like tenor
          and aggregate  principal amount will be issued  to the designated
          transferee or transferees.

                    The  Securities of  this  series are  issuable only  as
          Registered  Securities,  without  coupons,  in  denominations  of

           
          
                                       -4-          
                                       
          $1,000  and  any amount  in excess  thereof  that is  an integral
          multiple of $1,000.   As provided in the Indenture and subject to
          certain limitations therein set  forth, Securities of this series
          and  Tranche  are exchangeable  for  a  like aggregate  principal
          amount  of  Securities of  the same  series  and Tranche,  of any
          authorized  denominations, requested  by the  Holder surrendering
          the same,  and of  like tenor upon  surrender of the  Security or
          Securities to be exchanged  at the Corporate Trust Office  of the
          Trustee or such  other office or agency  as may be designated  by
          the Company for  such purpose  in the Borough  of Manhattan,  The
          City of New York, New York.

                    No  service   charge  shall   be  made  for   any  such
          registration of transfer or exchange, but the Company may require
          payment  of  a  sum   sufficient  to  cover  any  tax   or  other
          governmental charge payable in connection therewith.

                    Prior to due presentment of this Security for registra-
          tion of transfer,  the Company, the Trustee and any  agent of the
          Company or the  Trustee may treat the  Person in whose name  this
          Security  is registered  as  the absolute  owner  hereof for  all
          purposes,  whether or not  this Security be  overdue, and neither
          the Company,  the Trustee nor any such agent shall be affected by
          notice to the contrary.

                    The Indenture  and the Securities shall  be governed by
          and construed in  accordance with the  laws of the  State of  New
          York.

                    All terms  used in this  Security which are  defined in
          the Indenture shall  have the  meanings assigned to  them in  the
          Indenture.

                    As provided in the Indenture,  no recourse shall be had
          for  the payment  of the  principal of,  or premium,  if any,  or
          interest  on, any  Securities, or  any part  thereof, or  for any
          claim  based thereon or otherwise  in respect thereof,  or of the
          indebtedness  represented  thereby,   or  upon  any   obligation,
          covenant   or  agreement   under  the   Indenture,  against   any
          incorporator, stockholder,  officer or director,  as such,  past,
          present  or future,  of  the Company  or  of any  predecessor  or
          successor corporation (either directly  or through the Company or
          a predecessor or successor corporation), whether by virtue of any
          constitutional  provision,  statute or  rule  of law,  or  by the
          enforcement  of any assessment or penalty  or otherwise; it being
          expressly  agreed and understood  that the Indenture  and all the
          Securities are solely corporate obligations, and that no personal
          liability  whatsoever shall  attach to,  or be  incurred by,  any
          incorporator,  stockholder, officer  or director, as  such, past,
          present  or  future  of the  Company  or  of  any predecessor  or
          successor corporation (either directly  or through the Company or
          a   predecessor  or  successor   corporation),  because   of  the
          indebtedness thereby authorized or  under or by reason of  any of
          the  obligations,  covenants  or  agreements  contained  in   the
          Indenture or in any of  the Securities or to be  implied herefrom
          or  therefrom, and  that any  such personal  liability  is hereby
          expressly waived and  released as a condition of, and  as part of
          the  consideration for, the  execution of  the Indenture  and the
          issuance of the Securities.

                    Unless the  certificate  of authentication  hereon  has
          been executed by the  Trustee by manual signature,  this Security
          shall not be  entitled to any benefit  under the Indenture or  be
          valid or obligatory for any purpose.

          
                                       -5-

                    IN WITNESS WHEREOF, the Company has caused this instru-
          ment to  be duly executed under its corporate seal as of the date
          of authentication set forth below.

                                   NORTHWEST NATURAL GAS COMPANY


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

          [SEAL]

          Attest:
                                    
          --------------------------


                    This is one  of the Securities of the series designated
          in accordance  with,  and referred  to  in, the  within-mentioned
          Indenture.

          Date of Authentication:

                                   Bankers Trust Company
                                   as Trustee

                                   By: 
                                      ------------------------------
                                        Authorized Signatory


                        -------------------------

                    FOR  VALUE  RECEIVED,  the  undersigned  hereby  sells,
          assigns and transfers unto 
                                     ------------------------------
                                     [please insert social security
                                     or other identifying number of
                                     assignee]


          ---------------------------------------------------------------
          [name and address of transferee must be printed or typewritten]


          ---------------------------------------------------------------

          the  within Security of  NORTHWEST NATURAL  GAS COMPANY  and does
          hereby irrevocably constitute and appoint


          ---------------------------------------------------------------

          attorney, to transfer said  Security on the books of  the within-
          mentioned  Company,  with  full  power  or  substitution  in  the
          premises.

          Dated: 
                 ------------------------    ----------------------------