Document:

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                                                                 EXHIBIT 10.28.2

                                                   [SHELL WESTERN E&P Inc. LOGO]

                          SHELL WESTERN E&P INC.
                          A Subsidiary of Shell Oil Company

                                                          P.O. Box 4684
                                                          Houston.TX 77210

                          January 26, 1988

Alaska Pipeline Company
ATTN: Mr. R. F. Barnes, President
P. 0. Box 190288
Anchorage, AK 99519-0288

Gentlemen:

SUBJECT: BELUGA GAS FIELD

Please refer to the Gas Purchase Contract dated December 20, 1982, between Shell
Oil Company, predecessor in interest of Shell Western E&P Inc. ("Seller") and
Alaska Pipeline Company ("Buyer"), covering the sale and purchase of certain
natural gas produced from the Beluga Gas Field, Cook Inlet Area, Alaska
("Beluga Contract").

Buyer has entered into a Gas Sales Contract dated December 22, 1987, with
Phillips 66 Natural Gas Company ("Phillips"), covering the sale of gas by Buyer
to Phillips for Phillips' liquefied natural gas facility located at Nikishka,
Kenai Peninsula Borough, Alaska ("Phillips Contract").

In consideration of the mutual promises made herein, Seller and Buyer agree as
follows:

      1.    At Buyer's sole election, exercisable by notice from Buyer to
            Seller, as hereinafter provided, Seller agrees to sell and deliver
            to Buyer and Buyer agrees to purchase and receive from Seller a
            volume of gas equal to the volume of gas sold under the Phillips
            Contract during the term thereof, but not including any volume of
            gas sold thereunder after May 31, 1989. The volume of gas to be sold
            hereunder is referred as the "Supplemental Volume."

      2.    All words and terms defined in the Beluga Contract shall, if used
            herein, have the same meaning as so defined.

      3.    Deliveries hereunder shall begin on a date selected by Buyer not
            less than six months after notice from Buyer to Seller confirming
            Buyer's election to purchase the Supplemental Volume and specifying
            such date and shall continue until the earlier of (a) the date of
            termination of the Beluga Contract and (b) the date on which all of
            the Supplemental Volume has been delivered. The Supplemental Volume
            shall be delivered at rates elected by Buyer upon notice by Buyer to
            Seller of not less than 4,000 MCF per day and not more than 10,000
            MCF per day; provided, that, on any day, the sum of the volume
            delivered hereunder and the volume delivered under the Beluga
            Contract shall not exceed the applicable swing rate.

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                                                                               2

      4.    The price per MCF to be paid by Buyer to Seller for gas delivered
            hereunder shall be the average price, weighted as to volume, paid
            per MCF under the Phillips Contract for deliveries thereunder prior
            to June 1, 1989, multiplied by a fraction, the numerator of which is
            the Posted Price on the November 1 preceding the date of first
            deliveries of the Supplemental Volume and the denominator of which
            is the Posted Price on November 1, 1987.

      5.    Deliveries hereunder shall be made upon the same terms and
            conditions set out in the Beluga Contract; provided, if any conflict
            exists, as to the Supplemental Volume, between the terms of the
            Beluga Contract and the terms hereof, the terms hereof shall
            prevail.

      6.    Buyer shall promptly undertake to obtain an initial determination by
            the Alaska Public Utilities Commission that the costs incurred by
            Buyer hereunder constitute reasonable and recoverable costs of
            Buyer's public utility business. In the event that within ninety
            (90) days from the date of this agreement such determination is
            refused, then Buyer or Seller may by written notice terminate this
            agreement.

Please indicate your agreement to the foregoing by executing all copies of this
letter and by returning one copy to the undersigned.

                                                Yours very truly,

                                                SHELL WESTERN E&P INC.

                                                By /s/ L. L. Smith
                                                   ------------------------
                                                   Attorney-in-Fact

AGREED:

ALASKA PIPELINE COMPANY

By /s/ R.F. Barnes
   -----------------------<PAGE>

                                                                   EXHIBIT 10.29
                                    RECEIVED
                                   Executive

                                                        [SHELL OIL COMPANY LOGO]

                                  MAR 06 1990

                                                            One Shell Plaza
                                                            P O Box 2463
                                                            Houston. Texas 77252

February 27, 1990

Certified Mail
Return Receipt Requested

Mr. Richard F. Barnes
President
Alaska Pipeline Company
3000 Spenard Road
P. O. Box 190288
Anchorage, Alaska 99519-0288

Dear Mr. Barnes:

SUBJECT: PARTIAL ASSIGNMENT OF GAS PURCHASE CONTRACT
         GAS PURCHASE CONTRACT BETWEEN
         SHELL WESTERN E&P INC. AND
         ALASKA PIPELINE COMPANY
         DATED DECEMBER 20, 1982

This letter is written pursuant to a services agreement between Shell Western
E&P Inc. (SWEPI) and Shell Oil Company.

Please find enclosed one (1) copy of a Partial Assignment of the subject Gas
Purchase Contract from SWEPI to Arco Alaska, Inc. (ARCO). This document should
suffice as evidence of ARCO's assumption of an undivided one-third (1/3)
interest in and to all obligations and interests under the subject contract, as
amended.

This letter and enclosed copy of the assignment is being sent to fulfill the
notice requirements of Article XVI, paragraph 16.1 of the contract. Please
accept this notice as binding upon Alaska Pipeline Co. as of March 1, 1990
(although the assignment is dated October 1, 1989). ARCO is hereby notified by
copy of this letter of the effective date.

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                                                                               2

If you have any questions or problems regarding this transaction, please feel
free to contact me at (713) 241-6412 or Don Canavier at (713) 241-6230.

Yours very truly,

/s/ R. Planty

R. Planty
Regional Manager
Natural Gas Marketing - West

DLC/bdt

Enclosure

cc: Arco Alaska, Inc.
    Attn: Mr. Bruce Depriester
          Manager Marketing
    P.O. Box 100360
    Anchorage, Alaska 99510-0360

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                   PARTIAL ASSIGNMENT OF GAS PURCHASE CONTRACT

    This  partial assignment is made effective this 1st day of October, 1989,
by and between Shell Western E&P Inc., a Delaware corporation (hereinafter
referred to as "Assignor"), and ARCO Alaska, Inc., a Delaware corporation
(hereinafter referred to as "Assignee");

                                    Recitals

      WHEREAS, Shell Oil Company entered into a Gas Purchase Contract dated
December 20, 1982 to sell gas to Alaska Pipeline Company from the Beluga River
Gas Field area, Cook Inlet, Alaska (the "Enstar Contract"); and

      WHEREAS, Assignor has succeeded to the interest of Shell Oil Company, as
Seller under the Enstar contract; and

      WHEREAS, Enstar Corporation has succeeded to the interest of Alaska
Pipeline Company as Buyer under the Enstar Contract; and

      WHEREAS, Shell Oil Company entered into a Gas Purchase Agreement ("the
1984 Agreement"), with Atlantic Richfield Company dated July 1, 1984; and

      WHEREAS, Assignee has succeeded to the interest of its parent Atlantic
Richfield Company under the 1984 Agreement; and

      WHEREAS, under the 1984 Agreement, Assignor purchased from Assignee
portions of the gas sold by Assignor under the Enstar Contract; and

      WHEREAS, Assignor and Assignee mutually desire to terminate the 1984
Agreement, and in place of the 1984 Agreement enter into a partial assignment of
Assignor's rights, obligations and interests under the Enstar Contract as
amended, to Assignee;

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      NOW,  THEREFORE, in consideration of Ten Dollars ($10.00) and other good
and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, Assignor hereby assigns to Assignee an undivided one-third (1/3)
interest in and to Assignor's rights, obligations and interests under the Enstar
Contract as amended, a copy of which Contract and all amendments thereto are
attached hereto and made a part hereof, and Assignee hereby assumes an undivided
one-third (1/3) interest in and to Assignor's rights, obligations and interests
under the Enstar Contract as amended. Assignor and Assignee further agree that
the 1984 Agreement shall be cancelled as of the effective date of this
Assignment; provided, however, that if this Assignment or any part thereof is
void or becomes invalid, the 1984 Agreement, as amended, will be reinstated
according to its terms as of the date of execution of this Assignment.

      For the purpose of Article 17 of the Enstar Contract, Assignee's address
shall be:

            ARCO Alaska, Inc.
            P.O. Box 100360
            Anchorage, Alaska 99510-0360
            Attn: Manager Marketing

SHELL WESTERN E&P INC.                       ARCO ALASKA, INC.

By /s/ L. L. Smith                           By /s/ H.P. Foster, Jr.
   --------------------------                   --------------------------

                                                 H. P. Foster, Jr.
Its Attorney-in-Fact                         Its Senior Vice President
    --------------------------                   --------------------------

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STATE OF Texas)
               ss.
Harris County)

      The foregoing instrument was acknowledged before me this 22 day of
September, 1989, by L.L. Smith of SHELL WESTERN E&P INC., a Delaware
corporation, on behalf of the corporation.

                                                  /s/ Carolyn Clements
                                                  ------------------------------
                                                  Notary Public in and for Texas
                                                  My Commission Expires:12-21-92

STATE OF ALASKA)
                     ss.
Third Judicial Dist.)

     The foregoing instrument was acknowledged before me this 8th day of
February, 1990, by H.P. Foster, Jr. of ARCO ALASKA, INC., a Delaware
corporation, on behalf of the corporation.

                                                 /s/ Marilyn H. Roth
                                                 -------------------------------
                                                 NOTARY PUBLIC IN AND FOR ALASKA
                                                 MY COMMISSION EXPIRES: 8/24/93

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