Document:

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                                                                    EXHIBIT 10.4

                                 AMENDMENT NO. 1

                                       to

                 4-YEAR LETTER OF CREDIT REIMBURSEMENT AGREEMENT

                  THIS AMENDMENT NO. 1 TO 4-YEAR LETTER OF CREDIT REIMBURSEMENT
AGREEMENT (the "Amendment") is made as of March 18, 2004, by and among NISOURCE
FINANCE CORP. (the "Borrower"), NISOURCE INC. (the "Guarantor") and BARCLAYS
BANK PLC, as lender (in such capacity, the "Lender"), as administrative agent
(in such capacity, the "Administrative Agent") and as issuer of letters of
credit (in such capacity, the "LC Bank") under that certain 4-Year Letter of
Credit Reimbursement Agreement dated as of February 13, 2004, by and among the
Borrower, the Guarantor, the Lender, the LC Bank and the Administrative Agent
(as amended, supplemented or otherwise modified as of the date hereof, the "LC
Reimbursement Agreement"). Defined terms used herein and not otherwise defined
herein shall have the meaning given to them in the LC Reimbursement Agreement.

                                   WITNESSETH

                  WHEREAS, the Borrower, the Guarantor, the Lender, the LC Bank
and the Administrative Agent are parties to the LC Reimbursement Agreement; and

                  WHEREAS, the Borrower and the Guarantor have requested that
the Lender, the LC Bank and the Administrative Agent amend the LC Reimbursement
Agreement on the terms and conditions set forth herein;

                  WHEREAS, the Borrower, the Guarantor, the Administrative
Agent, the LC Bank and the Lender have agreed to amend the LC Reimbursement
Agreement on the terms and conditions set forth herein;

                  NOW, THEREFORE, in consideration of the premises set forth
above, the terms and conditions contained herein, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto have agreed to the following amendments to the LC Reimbursement
Agreement:

1.       Amendments to the LC Reimbursement Agreement. Effective as of the date
         hereof and subject to the satisfaction of the condition precedent set
         forth in Section 2 below, the LC Reimbursement Agreement is hereby
         amended as follows:

         1.1.     Section 1.1 of the LC Reimbursement is amended to insert
                  alphabetically therein the following defined terms:

                           "FEDERAL BANKRUPTCY CODE" means Title 11 of the
                  United States Code (11 U.S.C. Section 101 et seq.) as now or
                  hereafter in effect, or any successor statute.

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                           "364-DAY CREDIT AGREEMENT" means that certain 364-Day
                  Revolving Credit Agreement, dated as of March 18, 2004, by and
                  among the Borrower, the Guarantor, the lead arrangers,
                  co-documentation agents and other lenders from time to time
                  parties thereto, Credit Suisse First Boston, as syndication
                  agent, and Barclays, as administrative agent thereunder, as
                  the same may be amended, restated, supplemented, refinanced,
                  replaced or otherwise modified from time to time.

                           "3-YEAR CREDIT AGREEMENT" means that certain 3-Year
                  Revolving Credit Agreement, dated as of March 18, 2004, by and
                  among the Borrower, the Guarantor, the lead arrangers,
                  co-documentation agents and other lenders from time to time
                  parties thereto, Credit Suisse First Boston, as syndication
                  agent, and Barclays, as administrative agent thereunder, as
                  the same may be amended, restated, supplemented, refinanced,
                  replaced or otherwise modified from time to time.

         1.2.     The definition of "Bank Credit Agreement" now appearing in
                  Section 1.1 of the LC Reimbursement Agreement is deleted in
                  its entirety.

         1.3.     Clause (f) of the definition of "Change of Control" now
                  appearing in Section 1.1 of the LC Reimbursement Agreement is
                  amended to delete the reference therein to "Section 6.01(b)"
                  and substitute "Section 6.01(b)(iii)" therefor.

         1.4.     The definition of "Consolidated Debt" now appearing in Section
                  1.1 of the LC Reimbursement Agreement is amended to delete the
                  reference therein to "indebtedness" and substitute
                  "Indebtedness" therefor.

         1.5.     The definition of "Utility Subsidiary" now appearing in
                  Section 1.1 of the LC Reimbursement Agreement is amended to
                  insert the phrase ", and any Wholly-Owned Subsidiary thereof"
                  immediately before the end thereof.

         1.6.     Clause (ii) of Section 2.05(b) of the LC Reimbursement
                  Agreement is amended to delete the reference therein to "the
                  each Lender" and substitute "each Lender" therefor.

         1.7.     Clause (ii) of Section 3.01(c) of the LC Reimbursement
                  Agreement is deleted in its entirety and the following is
                  substituted therefor:

                  (ii) stating, in the case of the Borrower, that the Borrower
                  is authorized to transact business under the laws of the
                  jurisdiction of its place of incorporation, and, in the case
                  of the Guarantor, that the Guarantor is duly incorporated and
                  in good standing under the laws of the jurisdiction of its
                  place of incorporation.

         1.8.     Section 4.01(a) of the LC Reimbursement Agreement is deleted
                  in its entirety and the following is substituted therefor:

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                           (a) Each of the Borrower and the Guarantor is a
                  corporation duly organized, validly existing and, in the case
                  of the Borrower, authorized to transact business under the
                  laws of the State of its incorporation, and, in the case of
                  the Guarantor, in good standing under the laws of the State of
                  its incorporation.

         1.9.     Section 4.01(g) of the LC Reimbursement Agreement is deleted
                  in its entirety and the following is substituted therefor:

                           (g) There is no pending or threatened action,
                  proceeding or investigation affecting such Credit Party before
                  any court, governmental agency or other Governmental Authority
                  or arbitrator that (taking into account the exhaustion of
                  appeals) would have a Material Adverse Effect, or that (i)
                  purports to affect the legality, validity or enforceability of
                  this Agreement, or (ii) seeks to prohibit the ownership or
                  operation, by any Credit Party or any of their respective
                  Material Subsidiaries, of all or a material portion of their
                  respective businesses or assets.

         1.10.    Section 4.01 of the LC Reimbursement Agreement is amended to
                  insert the following new subsection (r) at the end thereof:

                           (r) The information, exhibits and reports furnished
                  by the Borrower or any of its Subsidiaries to the
                  Administrative Agent or to any Lender in connection with the
                  negotiation of, or compliance with, the Credit Documents,
                  taken as a whole, do not contain any material misstatement of
                  fact and do not omit to state a material fact or any fact
                  necessary to make the statements contained therein not
                  misleading in light of the circumstances made.

         1.11.    The proviso appearing in Section 5.01(e) of the LC
                  Reimbursement Agreement is amended to delete the last
                  reference therein to "such Person" and substitute "any Credit
                  Party" therefor.

         1.12.    Section 5.01(g) of the LC Reimbursement Agreement is deleted
                  in its entirety and the following is substituted therefor:

                           (g) KEEPING OF BOOKS. Keep, and cause each of its
                  Subsidiaries to (i) keep, proper books of record and account,
                  in which full and correct entries shall be made of all
                  material financial transactions and the assets and business of
                  each of the Credit Parties and each of their respective
                  Subsidiaries, and (ii) maintain a system of accounting
                  established and administered in accordance with generally
                  accepted accounting principles consistently applied.

         1.13.    Section 5.01(h)(i)-(ii) of the LC Reimbursement Agreement is
                  deleted in its entirety and the following is substituted
                  therefor:

                           (i) as soon as available and in any event within 60
                  days after the end of each of the first three quarters of each
                  fiscal year of the Guarantor (or, if earlier, concurrently
                  with the filing thereof with the Securities and Exchange
                  Commission

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                  or any national securities exchange in accordance with
                  applicable law or regulation), balance sheets of the Guarantor
                  and its Consolidated Subsidiaries in comparative form as of
                  the end of such quarter and statements of income and retained
                  earnings of the Guarantor and its Consolidated Subsidiaries
                  for the period commencing at the end of the previous fiscal
                  year of the Guarantor and ending with the end of such quarter,
                  each prepared in accordance with generally accepted accounting
                  principles consistently applied, subject to normal year-end
                  audit adjustments, certified by the chief financial officer of
                  the Guarantor.

                           (ii) as soon as available and in any event within 90
                  days after the end of each fiscal year of the Guarantor (or,
                  if earlier, concurrently with the filing thereof with the
                  Securities and Exchange Commission or any national securities
                  exchange in accordance with applicable law or regulation), a
                  copy of the audit report for such year for the Guarantor and
                  its Consolidated Subsidiaries containing financial statements
                  for such year prepared in accordance with generally accepted
                  accounting principles consistently applied as reported on by
                  independent certified public accountants of recognized
                  national standing acceptable to the Required Lenders, which
                  audit was conducted by such accounting firm in accordance with
                  generally accepted auditing standards;

         1.14.    Section 5.01(h)(v) of the LC Reimbursement Agreement is
                  amended to (a) delete the reference therein to "the Public
                  Utilities Holding Company Act of 1935" and substitute "the
                  Public Utility Holding Company Act of 1935" therefor and (b)
                  delete in its entirety the phrase "or any national securities
                  exchange" appearing at the end thereof.

         1.15.    Section 5.01(h)(vi) of the LC Reimbursement Agreement is
                  deleted in its entirety and the following is substituted
                  therefor:

                           (vi) [Intentionally omitted.]

         1.16.    Clause (ii) of Section 6.01(b) of the LC Reimbursement
                  Agreement is deleted in its entirety and the following is
                  substituted therefor:

                           (ii) any Subsidiary of the Guarantor may merge into
                  the Guarantor or the Borrower or transfer assets to the
                  Borrower; and

         1.17.    Clause (iii)(D) of Section 6.01(b) of the LC Reimbursement
                  Agreement is amended to insert the phrase "and shall be a
                  Wholly-Owned Subsidiary of the Guarantor" immediately before
                  the end thereof.

         1.18.    Clause (i) of the proviso appearing in Section 6.01(e) of the
                  LC Reimbursement Agreement is deleted in its entirety and the
                  following is substituted therefor:

                  (i) imposed under an agreement described on Schedule 6.01(e),

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         1.19.    Section 8.01(e) of the LC Reimbursement Agreement is amended
                  to delete the reference immediately before the end thereof to
                  "the Bank Credit Agreement" and substitute "either the 364-Day
                  Credit Agreement or the 3-Year Credit Agreement" therefor.

         1.20.    Section 8.01(g) of the LC Reimbursement Agreement is amended
                  to delete the reference therein to "theft" and substitute
                  "their" therefor.

         1.21.    Clause (ii) of Section 8.01(i) of the LC Reimbursement
                  Agreement is amended to delete the reference therein to
                  "clauses (iii) through (vi)" and substitute "clauses (c)
                  through (f)" therefor.

         1.22.    The third sentence of Section 9.01(c) of the LC Reimbursement
                  Agreement is amended to insert the parenthetical "(or, if
                  applicable, all of the Lenders)" immediately after the
                  reference therein to "Required Lenders".

         1.23.    The last sentence of Section 9.01(h) of the LC Reimbursement
                  Agreement is amended to delete the reference therein to "is
                  has not relied" and substitute "it has not relied" therefor.

         1.24.    Section 11.02(b) of the LC Reimbursement Agreement is deleted
                  in its entirety and the following is substituted therefor:

                           (b) Neither this Agreement nor any provision hereof
                  may be waived, amended or modified except pursuant to an
                  agreement or agreements in writing entered into by the
                  Borrower, the Guarantor and the Required Lenders or by the
                  Borrower, the Guarantor and the Administrative Agent with the
                  consent of the Required Lenders; provided that no such
                  agreement shall (i) increase the Commitment of any Lender
                  without the written consent of such Lender, (ii) reduce the
                  principal amount of any Unreimbursed LC Disbursements or
                  reduce the rate of interest thereon, or reduce any fees or
                  other amounts payable hereunder, without the written consent
                  of each Lender affected thereby, (iii) extend the expiry date
                  of any Letter of Credit to a date after the Termination Date,
                  postpone the scheduled date of payment of any fees or other
                  amounts payable hereunder, or reduce the amount of, waive or
                  excuse any such payment, or postpone the scheduled date of
                  expiration of any Commitment, without the written consent of
                  each Lender affected thereby, (iv) change Section 2.09(b) or
                  (c) in a manner that would alter the pro rata sharing of
                  payments required thereby, without the written consent of each
                  Lender, (v) release the Guarantor from its obligations under
                  the Guaranty without the written consent of each Lender, or
                  (vi) change any of the provisions of this Section or the
                  definition of "Required Lenders" or any other provision hereof
                  specifying the number or percentage of Lenders required to
                  waive, amend or modify any rights hereunder or make any
                  determination or grant any consent hereunder, without the
                  written consent of each Lender; provided, further, that no
                  such agreement shall amend, modify or otherwise affect the
                  rights or duties of the Administrative Agent or the LC Bank
                  hereunder without the prior written consent of the
                  Administrative Agent or the LC Bank, as the case may be.

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         1.25.    The last sentence of Section 11.04(b) of the LC Reimbursement
                  Agreement is deleted in its entirety and the following is
                  substituted therefor:

                  Upon acceptance and recording pursuant to paragraph (d) of
                  this Section, from and after the effective date specified in
                  each Assignment and Acceptance, the assignee thereunder shall
                  be a party hereto and, to the extent of the interest assigned
                  by such Assignment and Acceptance, have the rights and
                  obligations of a Lender under this Agreement, and the
                  assigning Lender thereunder shall, to the extent of the
                  interest assigned by such Assignment and Acceptance, be
                  released from its obligations under this Agreement (and, in
                  the case of an Assignment and Acceptance covering all of the
                  assigning Lender's rights and obligations under this
                  Agreement, such Lender shall cease to be a party hereto but
                  shall continue to be entitled to the benefits of Sections
                  2.07, 2.08 and 11.03). Any assignment or transfer by a Lender
                  of rights or obligations under this Agreement that does not
                  comply with this paragraph shall be treated for purposes of
                  this Agreement as a sale by such Lender of a participation in
                  such rights and obligations in accordance with paragraph (e)
                  of this Section.

         1.26.    Article XI of the LC Reimbursement Agreement is amended to
                  insert the following new Section 11.13 at the end thereof:

                           SECTION 11.13. USA PATRIOT ACT. Each Lender hereby
                  notifies the Credit Parties that pursuant to the requirements
                  of the USA PATRIOT Act (Title III of Pub. L. 107-56 (signed
                  into law October 26, 2001)) (the "Act"), it is required to
                  obtain, verify and record information that identifies the
                  Credit Parties, which information includes the name and
                  address of the Credit Parties and other information that will
                  allow such Lender to identify the Credit Parties in accordance
                  with the Act.

         1.27.    Schedule 6.01(e) to the LC Reimbursement Agreement is deleted
                  in its entirety and a new Schedule 6.01(e) in the form of
                  Attachment A hereto is substituted therefor.

2.       Condition of Effectiveness. The effectiveness of this Amendment is
         subject to the condition precedent that the Administrative Agent shall
         have received duly executed originals of this Amendment from each of
         the Borrower, the Guarantor, the Lender, the LC Bank and the
         Administrative Agent.

3.       Representations and Warranties of the Borrower and the Guarantor. Each
         of the Borrower and the Guarantor hereby represents and warrants as
         follows:

         (a)      Each of the Borrower and the Guarantor hereby represents and
                  warrants that this Amendment and the LC Reimbursement
                  Agreement as previously executed and as modified hereby
                  constitute legal, valid and binding obligations of the
                  Borrower and the Guarantor and are enforceable against the
                  Borrower and the Guarantor in accordance with their terms
                  (except as enforceability may be limited by

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                  bankruptcy, insolvency or similar laws affecting the
                  enforcement of creditors' rights generally).

         (b)      Upon the effectiveness of this Amendment and after giving
                  effect hereto, each of the Borrower and the Guarantor hereby
                  (i) reaffirms all covenants, representations and warranties
                  made in the LC Reimbursement Agreement as modified hereby, and
                  agrees that all such covenants, representations and warranties
                  shall be deemed to have been remade as of the effective date
                  of this Amendment except that any such covenant,
                  representation, or warranty that was made as of a specific
                  date shall be considered reaffirmed only as of such date and
                  (ii) certifies to the Administrative Agent, the LC Bank and
                  the Lender that no Default has occurred and is continuing.

4.       Reference to the Effect on the LC Reimbursement Agreement.

         4.1.     Upon the effectiveness of Section 1 hereof, on and after the
                  date hereof, each reference in the LC Reimbursement Agreement
                  (including any reference therein to "this LC Reimbursement
                  Agreement," "hereunder," "hereof," "herein" or words of like
                  import referring thereto) or in any other Credit Document
                  shall mean and be a reference to the LC Reimbursement
                  Agreement as modified hereby.

         4.2.     Except as specifically modified above, the LC Reimbursement
                  Agreement and all other documents, instruments and agreements
                  executed and/or delivered in connection therewith, shall
                  remain in full force and effect, and are hereby ratified and
                  confirmed.

         4.3.     The execution, delivery and effectiveness of this Amendment
                  shall not operate as a waiver of any right, power or remedy of
                  the Administrative Agent, the LC Bank or the Lender, nor
                  constitute a waiver of any provision of the LC Reimbursement
                  Agreement or any other documents, instruments and agreements
                  executed and/or delivered in connection therewith.

5.       GOVERNING LAW. THIS AMENDMENT SHALL BE CONSTRUED IN ACCORDANCE WITH AND
         GOVERNED BY THE INTERNAL LAWS OF THE STATE OF NEW YORK.

6.       Headings. Section headings in this Amendment are included herein for
         convenience of reference only and shall not constitute a part of this
         Amendment for any other purpose.

7.       Counterparts. This Amendment may be executed by one or more of the
         parties to this Amendment on any number of separate counterparts and
         all of said counterparts taken together shall be deemed to constitute
         one and the same instrument.

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                  IN WITNESS WHEREOF, this Amendment has been duly executed as
of the day and year first above written.

                                        NISOURCE FINANCE CORP., as Borrower

                                        By: /s/ David J. Vajda
                                            ------------------------------------
                                            Name: David J. Vajda
                                            Title: Voce President and Treasurer

                                        NISOURCE INC., as Guarantor

                                        By: /s/ David J. Vajda
                                            ------------------------------------
                                            Name: David J. Vajda
                                            Title: Voce President and Treasurer

                                        BARCLAYS BANK PLC, as a Lender, as LC
                                        Bank and as Administrative Agent

                                        By: /s/ Gary B. Wenslow
                                            ------------------------------------
                                            Name: Gary B. Wenslow
                                            Title: Associate Director

                      Signature Page to Amendment No. 1 to
                 4-Year Letter of Credit Reimbursement Agreement

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                                                                    ATTACHMENT A

                                SCHEDULE 6.01(e)
                               EXISTING AGREEMENTS

1.       Lease Agreement, dated December 14, 1999, between Whiting Leasing LLC
         and Whiting Clean Energy, Inc. ($261,000,000).

2.       3-Year Revolving Credit Agreement, dated as of March 18, 2004, among
         the Borrower, the Guarantor, the lenders parties thereto and Barclays
         Bank PLC, as administrative agent.

3.       364-Day Revolving Credit Agreement, dated as of March 18, 2004, among
         the Borrower, the Guarantor, the lenders parties thereto and Barclays
         Bank PLC, as administrative agent.

4.       Various cumulative preferred stocks of NIPSCO.<PAGE>

EXHIBIT 10.40

                               AMENDMENT NO. 2 TO
                       FUMED METAL OXIDE SUPPLY AGREEMENT
                   (Extension of Time for Non-Renewal Notice)

         This agreement is made and executed as of December 17, 2003 by and
between Cabot Corporation, a Delaware corporation ("Cabot"), and Cabot
Microelectronics Corporation, a Delaware corporation ("CMC"), and supplements
and amends the Fumed Metal Oxide Supply Agreement executed on January 20, 2000,
as amended December 11, 2001 by Amendment No. 1 (as amended hereby, the
"Agreement") between Cabot and CMC. Capitalized terms used herein without
definition and defined in the Agreement shall have the same meanings as defined
in the Agreement. Except as explicitly amended hereby, nothing herein shall
amend or modify the Agreement.

                                    RECITALS

         WHEREAS, CMC and Cabot are in negotiations to enter into a Fumed Silica
Supply Agreement (the "Fumed Silica Agreement") as to the supply by Cabot to CMC
of Fumed Silica; and

         WHEREAS, CMC and Cabot wish to amend the Agreement to extend the period
for non-renewal;

         NOW THEREFORE, the Parties do hereby agree as follows:

1.       Section 1 of the Agreement is hereby amended to read in its entirety as
         follows:

                  "This Agreement shall commence on the date of the initial
                  public offering by CMC of shares of CMC common stock, and
                  shall continue until June 30, 2005 (the "Initial Term").
                  Unless either party shall give a notice of non renewal prior
                  to February 1, 2004, this Agreement shall continue after the
                  Initial Term until terminated by either party by a written
                  notice of termination, which shall terminate this Agreement
                  effective on the first June 30 or December 31 more than 18
                  months after the date such notice is delivered. The Initial
                  Term, together with any continuations, are referred to herein
                  as the "Term". Each year of the Term beginning on the
                  effective date or an anniversary thereof is referred to herein
                  as a "Term Year", including the stub period, if any, between
                  the last anniversary of the effective date and the end of the
                  Term."

2.       Except as amended hereby the Agreement is ratified and confirmed in all
         respects.

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         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as a sealed instrument and delivered by their respective duly
authorized representatives as of the date first set forth above.

CABOT CORPORATION

By_________________________
       Duly Authorized
Name:  Eduardo Cordeiro
Title: Vice President

CABOT MICROELECTRONICS CORPORATION

By_________________________
         Duly Authorized
Name:    Daniel J. Pike
Title:   Vice President

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