AMENDMENT NO. 1 TO CREDIT AGREEMENT

               AMENDMENT NO. 1 TO CREDIT AGREEMENT,  dated as of January 8, 2003
(this "Amendment"),  among NORTHWESTERN CORPORATION, a Delaware corporation (the
"Borrower"),  the several banks and other  financial  institutions  from time to
time party hereto and CREDIT SUISSE FIRST BOSTON,  as  Administrative  Agent (in
such capacity the "Administrative Agent").

               A. Reference is made to that certain Credit  Agreement,  dated as
of December 17, 2002, among the Borrower,  the several banks and other financial
institutions   from  time  to  time  party  thereto   (each,   a  "Lender"  and,
collectively, the "Lenders"), Credit Suisse First Boston, and the Administrative
Agent (as the same has been or may be further amended, supplemented or otherwise
modified  from time to time,  the  "Credit  Agreement"),  pursuant  to which the
Lenders have  extended and agreed to extend  credit to the Borrower on the terms
and subject to the conditions set forth therein.

               B. The  Borrower  has  requested  that the  Credit  Agreement  be
amended in accordance with the terms set forth herein.

               C. Accordingly,  in consideration of the mutual agreements herein
contained and other good and valuable consideration, the sufficiency and receipt
of which are hereby acknowledged, the parties hereto hereby agree as follows:

                                A G R E E M E N T

               SECTION 1.  Definitions.  Unless otherwise  specifically  defined
herein,  capitalized  terms used  herein  shall have their  respective  meanings
assigned to such terms in the Credit Agreement.

               SECTION  2.  Amendment.  Subject  to the  effectiveness  of  this
Amendment in accordance  with Section 4 hereof,  the Credit  Agreement is hereby
amended as follows:

               (a)  Section  1.1 of the Credit  Agreement  is hereby  amended by
        inserting the following definitions to appear in alphabetical order:

               `"Amendment No. 1 to Credit Agreement" shall mean Amendment No. 1
        to Credit Agreement, dated as of January 8, 2003 among the Borrower, the
        several banks and other financial  institutions  from time to time party
        thereto and Credit Suisse First Boston, as administrative agent.'

               `"Commitment  Fee" shall  have the  meaning  ascribed  thereto in
        Section 2.4(a).'

               (b)  Section  2.1 of the Credit  Agreement  is hereby  amended by
        replacing  the text "in a principal  amount not to exceed such  Lender's
        Commitment" with the following text:





               "in a principal amount equal to such Lender's Commitment".

               (c)  Section  2.3 of the Credit  Agreement  is hereby  amended by
        replacing clause (2) with the following text:

               "(2)  the  aggregate  amount  to  be  borrowed  (which  shall  be
        $390,000,000),".

               (d) Section 2.4 of the Credit  Agreement is hereby deleted in its
        entirety and replaced with the following in place thereof:

               "(a)   Commitment   Fee.  The  Borrower  agrees  to  pay  to  the
        Administrative  Agent for the  account of each Lender a  commitment  fee
        (each a "Commitment Fee"), which shall accrue at seven and three-quarter
        percent  (7.75%) per annum on the daily amount of the Commitment of such
        Lender then outstanding during the period from and including January 17,
        2003 to but  excluding the earlier of the Cash  Collateral  Release Date
        and the date on which such  Commitments  terminate.  Accrued  Commitment
        Fees shall be payable on the Cash  Collateral  Release  Date or upon the
        termination of the Commitments. All Commitment Fees shall be computed on
        the basis of a 360-day  year and shall be payable for the actual  number
        of days elapsed (including the first day but excluding the last day).

               (b) Administrative  Agent Fees. The Borrower agrees to pay to the
        Administrative  Agent,  for the  account  of CSFB or the  Administrative
        Agent,  concurrent  with  signing  of this  Agreement  (or as  otherwise
        specified  therein),  such fees as agreed to between  the  Borrower  and
        CSFB.

               (c) Fees Generally.  All fees payable  hereunder shall be paid on
        the dates due, in immediately  available  funds,  to the  Administrative
        Agent for the benefit of the parties entitled  thereto.  Fees paid shall
        not be refundable under any circumstances."

               (e) Section  2.6(d) of the Credit  Agreement is hereby deleted in
        its entirety and replaced with the following in place thereof:

               "(d) Mandatory Prepayment or Termination.  If the Cash Collateral
        Release Date has not occurred on or prior to February 10, 2003, then the
        Loans shall  become due and payable in full on February 11, 2003 and the
        Borrower  shall  prepay  the Loans on such date (or if no Loans are then
        outstanding,  the Commitments (and the Lenders' obligations hereunder to
        extend any credit) shall  terminate in full) and the Borrower  shall pay
        on such date to the Administrative  Agent for the account of each Lender
        a  non-refundable  termination  fee  equal to one  percent  (1%) of such
        Lenders' Loans (or Commitment, as applicable)."

        SECTION 3.  Representations and Warranties.  The Borrower represents and
warrants  as of the date  hereof  to each of the  Administrative  Agent  and the
Lenders that after giving effect to this Amendment:





               (a) The  representations  and  warranties set forth in the Credit
Agreement  are true and correct in all  material  respects  except to the extent
such representations and warranties expressly related to an earlier date;

               (b) The Borrower is in compliance  in all material  respects with
all other terms and provisions  contained in the Credit Agreement required to be
observed or performed;

               (c)  No  Default  or  Event  of  Default  has   occurred  and  is
continuing;

               (d) The  Borrower  has  the  corporate  power  and  authority  to
execute,  deliver and perform this Amendment and has taken all corporate actions
necessary  to  authorize  the  execution,   delivery  and  performance  of  this
Amendment;

               (e) This Amendment has been duly executed and delivered on behalf
of  the  Borrower  by a  duly  authorized  officer  or  attorney-in-fact  of the
Borrower;

               (f) The  execution,  delivery and  performance  of this Amendment
will not violate any Requirement of Law or any material  contractual  obligation
binding on the Borrower or any of its Subsidiaries; and

               (g) No consent or  authorization  of,  filing with,  notice to or
other act by or in respect of, any Governmental Authority or any other Person is
required  in  connection  with the  execution,  delivery or  performance  by the
Borrower of this Amendment.

The Borrower acknowledges and agrees that the representations and warranties set
forth above shall survive the execution and delivery  hereof and shall be deemed
made in the  Credit  Agreement  for  purposes  of  Section  7.1(b) of the Credit
Agreement.

               SECTION 4.  Effectiveness.  This Amendment shall become effective
on the date the Administrative Agent receives (i) counterparts of this Amendment
that, when taken together,  bear the signatures of the Borrower and of CSFB, and
(ii) payment of all of its reasonable  out-of-pocket costs and expenses incurred
in connection with this Amendment  (including,  without  limitation,  reasonable
fees and expenses of its counsel) for which  invoices have been submitted to the
Borrower.  The  Administrative  Agent shall promptly notify the Borrower and the
Lenders of the effective  date hereof,  and such notice shall be conclusive  and
binding on all parties hereto.

               SECTION  5  Miscellaneous.  (a)  Except  as  expressly  set forth
herein,  this Amendment shall not, by implication or otherwise,  limit,  impair,
constitute  a waiver of, or  otherwise  affect the  rights and  remedies  of the
Lenders or the  Administrative  Agent,  under the Credit  Agreement or any other
Loan Document,  and shall not alter,  modify,  amend or in any way affect any of
the terms,  conditions,  obligations,  covenants or agreements  contained in the
Credit  Agreement  or any other Loan  Document,  all of which are  ratified  and
affirmed in all  respects and shall  continue in full force and effect.  Nothing
herein  shall be deemed to entitle  the  Borrower  to a consent to, or a waiver,
amendment,  modification  or other  change  of,  any of the  terms,  conditions,
obligations,  covenants  or  agreements  contained  in the Credit  Agreement  in
similar or different circumstances.  This Amendment shall apply and be effective
only  with  respect  to the  provisions  of the  Credit  Agreement  specifically
referred to herein.  Upon this Amendment




becoming  effective as provided  herein,  the term "Loan Document" as defined in
the Credit Agreement shall include, without limitation, this Amendment.

               (b) As used  in the  Credit  Agreement,  the  terms  "Agreement,"
        "herein,"  "hereinafter,"  "hereunder,"  "hereto,"  and words of similar
        import shall mean, from and after the date hereof,  the Credit Agreement
        as amended by this Amendment.

               (c) Section headings used herein are for convenience of reference
        only and are not to affect  the  construction  of,  or to be taken  into
        consideration in interpreting, this Amendment.

               (d) THIS  AMENDMENT  SHALL BE  CONSTRUED IN  ACCORDANCE  WITH AND
        GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.  The parties  hereto each
        hereby  consents  to the  non-exclusive  jurisdiction  of the  state and
        federal courts of the State of New York and irrevocably waives all right
        to trial by jury in any action,  proceeding or counterclaim  arising out
        of or relating to this Amendment.

               (e) This Amendment may be executed in any number of counterparts,
        each of  which  shall  be an  original  but  all of  which,  when  taken
        together,  shall constitute but one instrument.  Delivery of an executed
        counterpart  of this  Amendment  by fax  will  be  deemed  as  effective
        delivery of an originally executed counterpart.

                            [Signature pages follow]





               IN WITNESS WHEREOF, the parties hereto have caused this Amendment
to be duly executed and delivered by their proper and duly  authorized  officers
as of the day and year first written.

                                        BORROWER:

                                        NORTHWESTERN CORPORATION


                                        By:  /s/ Eric R. Jacobsen
                                            ------------------------------------
                                            Name:     Eric R. Jacobsen
                                            Title:    Senior Vice President,
                                                      General Counsel & Chief
                                                      Legal Officer


                                       ADMINISTRATIVE AGENT:

                                       CREDIT SUISSE FIRST BOSTON


                                       By:  /s/ James P. Moran
                                            ------------------------------------
                                            Name:     James P. Moran
                                            Title:    Director


                                       By:  /s/ S. William Fox
                                            ------------------------------------
                                            Name:     S. William Fox
                                            Title:    Vice President


                                       LENDER


                                       CREDIT SUISSE FIRST BOSTON,
                                       CAYMAN ISLANDS BRANCH


                                       By:  /s/ James P. Moran
                                            ------------------------------------
                                            Name:     James P. Moran
                                            Title:    Director


                                       By:  /s/ S. William Fox
                                            ------------------------------------
                                            Name:     S. William Fox
                                            Title:    Vice President


             Signature Page to Amendment No. 1 to Credit Agreement