EXHIBIT 3.1

                      RESTATED ARTICLES OF INCORPORATION OF

                        PACIFIC GAS TRANSMISSION COMPANY


JACK F. JENKINS-STARK and LESLIE H. EVERETT certify that:

     1. They are the Chairman of the Board and the Secretary,  respectively,  of
Pacific Gas Transmission Company, a California corporation.

     2. The Articles of Incorporation of the corporation, as amended to the date
of the filing of this certificate,  including the amendment set forth herein but
not  separately  filed (and with the  omissions  required  by Section 910 of the
Corporations Code), are amended and restated as follows:

     First:  That  the  name  of this  corporation  is  PG&E  Gas  Transmission,
Northwest Corporation.

     Second:  The purpose of the  corporation  is to engage in any lawful act or
activity for which a corporation may be organized under the General  Corporation
Law of California other than the banking  business,  the trust company business,
or the practice of a profession  permitted to be  incorporated by the California
Corporations Code.

     Third:  The  corporation  elects to be governed by all of the provisions of
the  General  Corporation  Law (as  added to the  California  Corporations  Code
effective January 1, 1977, and as subsequently amended) not otherwise applicable
to this corporation under Chapter 23 of said General Corporation Law.

     Fourth:  The  corporation  is  authorized  to issue two  classes  of shares
designated  respectively  "Common Stock" and "Preferred Stock." The total number
of shares of Common Stock is 1,000,  and the total number of shares of Preferred
Stock which the  corporation is authorized to issue is 5,000,000.  The Preferred
Stock  may be  issued  from  time to time in one or more  series.  The  Board of
Directors is  authorized  to fix the number of shares of any series of Preferred
Stock  and to  determine  the  designation  of any  such  series.  The  Board of
Directors is also  authorized,  except as to matters fixed as to Preferred Stock
in  this  Article  Fourth,  to  determine  or  alter  the  rights,  preferences,
privileges,  and  restrictions  granted to or imposed  upon any wholly  unissued
series of Preferred Stock and, within the limits and restrictions  stated in any
resolution or resolutions of the Board of Directors originally fixing the number
of shares  constituting  any series,  to increase or decrease (but not below the
number of shares of such  series then  outstanding)  the number of shares of any
such  series  subsequent  to the  issue of  shares  of that  series.  


Except as therwise  provided by law,  the holders of Common Stock shall have and
possess  the  exclusive  right  to  notice  of  shareholders'  meetings  and the
exclusive voting rights and powers, and the holders of Preferred Stock shall not
be entitled to notice of any  shareholders'  meetings or to vote on the election
of directors or on any other matter.

     Fifth: The shares of stock may be offered for sale for money or in exchange
for property,  from time to time upon such terms and  conditions as the board of
directors may prescribe.

     Sixth:  The  liability  of the  directors of the  corporation  for monetary
damages shall be eliminated to the fullest extent  permissible  under California
law.

     Seventh: The corporation is authorized to provide indemnification of agents
(as defined in Section 317 of the California  Corporations Code) through Bylaws,
resolutions,  agreements  with agents,  vote of  shareholders  or  disinterested
directors, or otherwise, in excess of the indemnification otherwise permitted by
Section 317 of the California  Corporations Code, subject only to the applicable
limits set forth in Section 204 of the California Corporations Code.

     3.  The  foregoing  amendment  and  the  restatement  of  the  Articles  of
Incorporation  of the  corporation  have  been  duly  approved  by the  Board of
Directors.

     4. The foregoing amendment and restatement of the Articles of Incorporation
has been duly  approved by the required vote of the  shareholders  in accordance
with Section 902 of the California  Corporations  Code. The corporation has only
one class of shares  outstanding.  The total number of outstanding shares of the
corporation  entitled to vote on the  amendment  is 1,000.  The number of shares
voting in favor of the amendment exceeded the vote required. The percentage vote
required was more than 50%.

     5.  The  undersigned  have  read  and  understand  Section  110(c)  of  the
California  Corporations Code, and further understand and acknowledge that these
Restated  Articles of  Incorporation  will be  effective as of 12:01 a.m. PST on
January 1, 1998.

     We further  declare under penalty of perjury under the laws of the State of
California  that the matters set forth in this  certificate are true and correct
of our own knowledge.

DATED:  December 31, 1997.


                                                     
                                                     /s/ JACK JENKINS-STARK
                                                     -----------------------
                                                     Jack Jenkins-Stark
                                                     Chairman of the Board


                                                     /s/ LESLIE H. EVERETT
                                                     -----------------------
                                                     Leslie H. Everett
                                                     Secretary