Document:

<PAGE>
                                                                   EXHIBIT 10.46

        AMENDMENT NO. 1 TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT
                            DATED AS OF MAY 8, 2003

         This AMENDMENT NO. 1 TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT
(this "Agreement") is among PEABODY ENERGY CORPORATION, a Delaware corporation
(the "Borrower"), the Lenders (as defined below) and FLEET NATIONAL BANK, as
administrative agent (in such capacity, the "Administrative Agent").

                             PRELIMINARY STATEMENTS:

     1. The Borrower, the Lenders and the Administrative Agent have entered into
that certain Second Amended and Restated Credit Agreement, dated as of March 21,
2003, by and among the Borrower, the several lenders from time to time parties
thereto (the "Lenders"), Wachovia Bank, National Association and Lehman
Commercial Paper Inc., as syndication agents, Fleet Securities, Inc., Wachovia
Securities, Inc. and Lehman Brothers Inc., as arrangers, Morgan Stanley Senior
Funding, Inc. and U.S. Bank National Association, as documentation agents, and
the Administrative Agent (the "Credit Agreement"; capitalized terms used and not
otherwise defined herein have the meanings assigned to such terms in the Credit
Agreement).

     2. The Borrower has requested that the Lenders amend the definition of
"Change in Control" set forth in the Credit Agreement.

     3. Subject to the terms and conditions set forth below, and in
consideration of certain agreements of the Borrower and other Credit Parties set
forth herein, the Required Lenders are willing to agree to the amendment
described below.

         NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

         SECTION 1. Amendment to Credit Agreement. The definition of "Change in
Control" in Section 1.1 of the Credit Agreement is hereby amended by deleting
the definition in its entirety and replacing it with the following:

         "Change in Control": (i) any "person" or "group" (as such terms are
         used in Sections 13(d) and 14(d) of the Securities Exchange Act of
         1934, as amended (the "Exchange Act")), excluding LBMBP II and its
         Affiliates shall at any time (x) become, or obtain rights (whether by
         means or warrants, options or otherwise) to become, the "beneficial
         owner" (as defined in Rules 13(d)-3 and 13(d)-5 under the Exchange
         Act), directly or indirectly, of more than 20% of the outstanding
         common stock of the Borrower (provided that such percentage is also
         greater than the percentage of the outstanding common stock of the
         Borrower owned by LBMBP II and its Affiliates at such time) or (y) have
         the power to vote or direct the voting of securities having a majority
         of the ordinary voting power for the election of directors or managers
         of the Borrower (determined on a fully diluted basis) or (ii) a "Change
         of Control" (as defined in the Senior Notes Indenture as in effect on
         the Effective Date).

         SECTION 2. Conditions to Effectiveness. The effectiveness of this
Agreement is conditioned upon satisfaction of the following conditions
precedent:

<PAGE>

                  a. the Administrative Agent shall have received signed written
authorization from the Required Lenders to execute this Agreement and shall have
received counterparts of this Agreement signed by the Borrower and counterparts
of the Consent of Credit Parties attached hereto (the "Consent") signed by the
Credit Parties;

                  b. each of the representations and warranties in Section 3
below shall be true and correct in all material respects;

                  c. the Administrative Agent shall have received payment in
immediately available funds of all expenses incurred by the Administrative Agent
and the Syndication Agents (including, without limitation, legal fees) for which
invoices have been presented; and

                  d. the Administrative Agent shall have received such other
documents, instruments and opinions as it shall have reasonably requested.

         SECTION 3. Representations and Warranties. The Borrower represents and
warrants to the Administrative Agent and the Lenders as follows:

                  a. Authority. Each of the Credit Parties has the requisite
corporate power and authority to execute and deliver this Agreement and the
Consent, as applicable, and to perform its obligations hereunder and under the
Credit Documents (as modified hereby). The execution, delivery and performance
by the Borrower and each other Credit Party of this Agreement, the Consent (as
applicable), the Credit Documents (as modified hereby) and the transactions
contemplated hereby and thereby have been duly approved by all necessary
corporate action of such Person and no other corporate proceedings on the part
of such Person are necessary to consummate such transactions.

                  b. Enforceability. This Agreement has been duly executed and
delivered by the Borrower. The Consent has been duly executed and delivered by
each Credit Party. This Agreement, the Consent and each Credit Document (as
modified hereby) is the legal, valid and binding obligation of each Credit Party
hereto and thereto, enforceable against such Credit Party in accordance with its
terms, subject to the effects of bankruptcy, insolvency, fraudulent conveyance,
reorganization, moratorium and other similar laws relating to or affecting
creditors' rights generally, general equitable principles (whether considered in
a proceeding in equity or at law) and an implied covenant of good faith and fair
dealing, and is in full force and effect

                  c. Representations and Warranties. The representations and
warranties contained in each Credit Document (other than any such
representations and warranties that, by their terms, are specifically made as of
a date other than the date hereof) are true and correct in all material respects
on and as of the date hereof as though made on and as of the date hereof.

                  d. No Default. Both immediately before and after giving effect
to the amendment set forth in Section 1 hereof, no event has occurred and is
continuing that constitutes a Default or Event of Default.

         SECTION 4. Reference to and Effect on Credit Agreement.

                  a. Upon and after the effectiveness of this Agreement, each
reference in the Credit Agreement to "this Agreement", "hereunder", "hereof" or
words of like import referring to the Credit Agreement, and each reference in
the other Credit Documents to "the Credit Agreement", "thereunder", "thereof" or
words of like import referring to the Credit Agreement, shall mean and be a
reference to the Credit Agreement as modified hereby.

                                       2
<PAGE>

                  b. Except as specifically modified above, the Credit Agreement
and the other Credit Documents are and shall continue to be in full force and
effect and are hereby in all respects ratified and confirmed. Without limiting
the generality of the foregoing, the Security Documents and all of the
Collateral described therein do and shall continue to secure the payment of all
Obligations under and as defined therein, in each case as modified hereby.

                  c. The execution, delivery and effectiveness of this Agreement
shall not, except as expressly provided herein, operate as a waiver of any
right, power or remedy of the Administrative Agent or any Lender under any of
the Credit Documents, nor, except as expressly provided herein, constitute a
waiver or amendment of any provision of any of the Credit Documents.

         SECTION 5. Counterparts. This Agreement may be executed in any number
of counterparts and by different parties hereto in separate counterparts, each
of which when so executed and delivered shall be deemed to be an original and
all of which taken together shall constitute one and the same agreement.
Delivery of an executed counterpart of a signature page to this Agreement by
facsimile shall be effective as delivery of a manually executed counterpart of
this Agreement or such Consent.

         SECTION 6. Severability. Any provision of this Agreement that is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

         SECTION 7. Governing Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of New York.

                            [Signature Pages Follow]

                                       3
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective officers thereunto duly authorized, as of the date
first written above.

                                       PEABODY ENERGY CORPORATION,
                                       a Delaware corporation

                                       By: /s/ Steven F. Schaab
                                           -------------------------------------
                                           Name: Steven F. Schaab
                                           Title: V.P. and Treasurer

                                       FLEET NATIONAL BANK,
                                       as Administrative Agent, on behalf of the
                                       Required Lenders

                                       By: /s/ Christopher C. Holmgren
                                           -------------------------------------
                                           Name: Christopher C. Holmgren
                                           Title:  Managing Director

<PAGE>
                                                                  EXECUTION COPY

                            CONSENT OF CREDIT PARTIES
                             DATED AS OF MAY 8, 2003

                  The undersigned, as Guarantors and as Grantors under the
"Guarantee and Collateral Agreement", as Grantors under the "Trademark Security
Agreement" and each "Patent Security Agreement" and as Mortgagors under each
"Mortgage" (as such terms are defined in and under the Credit Agreement referred
to in the foregoing Amendment No. 1), as applicable, each hereby consents and
agrees to the foregoing Amendment No. 1 and hereby confirms and agrees that (i)
each of the Guarantee and Collateral Agreement, Trademark Security Agreement,
each Patent Security Agreement and each Mortgage is, and shall continue to be,
in full force and effect and is hereby ratified and confirmed in all respects
except that, upon the effectiveness of, and on and after the date of, said
Amendment No. 1, each reference in the Guarantee and Collateral Agreement, the
Trademark Security Agreement, each Patent Security Agreement and each Mortgage
to the "Credit Agreement", "thereunder", "thereof" and words of like import
referring to the Credit Agreement, shall mean and be a reference to the Credit
Agreement as modified by said Amendment No. 1, (ii) the Guarantee and Collateral
Agreement and all of the Collateral described therein does, and shall continue
to, secure the payment of all of the Obligations as defined in the Guarantee and
Collateral Agreement, (iii) the Trademark Security Agreement and all of the
Collateral described therein does, and shall continue to, secure the payment of
all of the Obligations as defined in the Guarantee and Collateral Agreement,
(iv) each Patent Security Agreement and all of the Collateral described therein
does, and shall continue to, secure the payment of all of the Obligations as
defined in the Guarantee and Collateral Agreement and (v) each Mortgage and all
of the Collateral described therein does, and shall continue to, secure the
payment of all of the Obligations as defined in the Guarantee and Collateral
Agreement.

                            [Signature page follows]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Consent of
Credit Parties to be executed by their respective officers thereunto duly
authorized, as of the date first written above.

                                       PEABODY ENERGY CORPORATION
                                       AFFINITY MINING COMPANY
                                       ARID OPERATIONS INC.
                                       BEAVER DAM COAL COMPANY
                                       BIG RIDGE, INC.
                                       BIG SKY COAL COMPANY
                                       BLACK WALNUT COAL COMPANY
                                       BLUEGRASS COAL COMPANY
                                       CABALLO COAL COMPANY
                                       CHARLES COAL COMPANY
                                       CLEATON COAL COMPANY
                                       COAL PROPERTIES CORP.
                                       COOK MOUNTAIN COAL COMPANY
                                       COTTONWOOD LAND COMPANY
                                       CYPRUS CREEK LAND COMPANY
                                       EACC CAMPS, INC.
                                       EASTERN ASSOCIATED COAL CORP.
                                       EASTERN ROYALTY CORP.
                                       GALLO FINANCE COMPANY
                                       GOLD FIELDS CHILE, S.A.
                                       GOLD FIELDS MINING CORPORATION
                                       GOLD FIELDS OPERATING CO. - ORTIZ
                                       GRAND EAGLE MINING, INC.
                                       HAYDEN GULCH TERMINAL, INC.
                                       HIGHLAND MINING COMPANY
                                       HILLSIDE MINING COMPANY
                                       INDEPENDENCE MATERIAL HANDLING COMPANY
                                       INTERIOR HOLDINGS CORP.
                                       JAMES RIVER COAL TERMINAL COMPANY
                                       JARRELL'S BRANCH COAL COMPANY
                                       JUNIPER COAL COMPANY
                                       KAYENTA MOBILE HOME PARK, INC.
                                       LOGAN FORK COAL COMPANY
                                       MARTINKA COAL COMPANY
                                       MIDCO SUPPLY AND EQUIPMENT CORPORATION
                                       MOUNTAIN VIEW COAL COMPANY
                                       NORTH PAGE COAL CORP.
                                       OHIO COUNTY COAL COMPANY
                                       PEABODY AMERICA, INC.
                                       PEABODY COAL COMPANY
                                       PEABODY COALSALES COMPANY
                                       PEABODY COALTRADE, INC.
                                       PEABODY DEVELOPMENT COMPANY

<PAGE>

                                       PEABODY ENERGY GENERATION HOLDING
                                       PEABODY ENERGY INVESTMENTS, INC.
                                       PEABODY ENERGY SOLUTIONS, INC.
                                       PEABODY HOLDING COMPANY, INC.
                                       PEABODY SOUTHWESTERN COAL COMPANY
                                       PEABODY TERMINALS, INC.
                                       PEABODY VENEZUELA COAL CORP.
                                       PEABODY WESTERN COAL COMPANY
                                       PINE RIDGE COAL COMPANY
                                       POND RIVER LAND COMPANY
                                       POWDER RIVER COAL COMPANY
                                       RIO ESCONDIDO COAL CORP.
                                       RIVERS EDGE MINING, INC.
                                       RIVERVIEW TERMINAL COMPANY
                                       SENECA COAL COMPANY
                                       SENTRY MINING COMPANY
                                       SNOWBERRY LAND COMPANY
                                       STERLING SMOKELESS COAL COMPANY
                                       YANKEETOWN DOCK CORPORATION

                                       By: /s/ Steven F. Schaab
                                           -------------------------------------
                                            Name: Steven F. Schaab
                                            Title: V.P.

                                       BLACK BEAUTY COAL COMPANY
                                            By: Thoroughbred, L.L.C.,
                                                a Delaware limited liability
                                                company, its Partner

                                            By: /s/ Steven F. Schaab
                                                --------------------------------
                                                Name: Steven F. Schaab
                                                Title: V.P.

                                       COLONY BAY COAL COMPANY
                                            By: Charles Coal Company,
                                                a Delaware corporation, its
                                                General Partner

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P.

<PAGE>

                                       CYPRUS CREEK LAND RESOURCES, LLC
                                            By: Peabody Development Company,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       MUSTANG ENERGY COMPANY, L.L.C.
                                            By: Peabody Energy Corporation,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       PATRIOT COAL COMPANY, L.P.
                                            By: Bluegrass Coal Company,
                                                a Delaware corporation, its
                                                Partner

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                            By: Sentry Mining Company,
                                                a Delaware corporation, its
                                                Partner

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       PEABODY ARCHVEYOR, L.L.C.
                                            By: Gold Fields Mining Corporation,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

<PAGE>

                                       PEABODY DEVELOPMENT LAND HOLDINGS, LLC
                                            By: Peabody Development Company,
                                                a Delaware corporation, its
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                            By: Peabody Holding Company, Inc.,
                                                a New York corporation, its
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       PEABODY NATURAL GAS, LLC
                                            By: Peabody Holding Company, Inc.,
                                                a New York corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       PEABODY NATURAL RESOURCES COMPANY
                                            By: Gold Fields Mining Corporation,
                                                a Delaware corporation, its
                                                Partner

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                            By: Peabody America, Inc.,
                                                a Delaware corporation, its
                                                Partner

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       PEABODY RECREATIONAL LANDS, L.L.C.
                                            By: Peabody Development Company,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

<PAGE>

                                       PEABODY-WATERSIDE DEVELOPMENT, L.L.C.
                                            By: Peabody Development Company,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       POND CREEK LAND RESOURCES, LLC
                                            By: Peabody Coal Company,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       PORCUPINE PRODUCTION, LLC
                                            By: Peabody Development Company,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       PORCUPINE TRANSPORTATION, LLC
                                            By: Peabody Development Company,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       PRAIRIE STATE GENERATING COMPANY, LLC
                                            By: Peabody Energy Corporation,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       STAR LAKE ENERGY COMPANY, L.L.C.
                                            By: Peabody Energy Corporation,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

<PAGE>

                                       THOROUGHBRED, L.L.C.
                                            By: Peabody Holding Company, Inc.,
                                                a New York corporation, its
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                            By: Peabody Development Company,
                                                a Delaware corporation, its
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       THOROUGHBRED GENERATING COMPANY, LLC
                                            By: Peabody Energy Corporation,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer

                                       THOROUGHBRED MINING COMPANY, L.L.C.
                                            By: Peabody Energy Corporation,
                                                a Delaware corporation, its Sole
                                                Member

                                            By: /s/ Steven F. Schaab
                                               ---------------------------------
                                               Name: Steven F. Schaab
                                               Title: V.P. and Treasurer<PAGE>

                                                                    EXHIBIT 10.1

                               THIRD AMENDMENT TO
                                  CONTRACT FOR
                                SERVICES BETWEEN
                 W.W. SLAUGHTER & DUKE ENERGY FIELD SERVICES, LP

         This Third Amendment to Contract for Services Between W.W. Slaughter
and Duke Energy Field Services Assets, LLC (this "Amendment"), dated as of April
16, 2003, is entered into by and between Duke Energy Field Services, LP, a
Delaware limited partnership (formerly known as Duke Energy Field Services
Assets, LLC) ("DEFS"), and William W. Slaughter ("Contractor").

         WHEREAS, Contractor and DEFS entered into that Contract for Services
dated as of April 1, 2000, as amended by that First Amendment to Contract for
Services dated as of June 29, 2000 and as further amended by that Second
Amendment to Contract for Services dated as of June 28, 2002 (collectively
referred to herein as the "Consulting Agreement") (capitalized terms used but
not defined herein shall have the meaning given thereto in the Consulting
Agreement); and

         WHEREAS, Contractor and DEFS desire to hereby amend the Consulting
Agreement.

         NOW, THEREFORE, for and in consideration of the mutual benefits to be
derived from this Amendment, and intending to be legally bound hereby, the
parties hereto hereby agree as follows:

         1. Amendment to Consulting Agreement. The Consulting Agreement is
hereby amended as follows:

         (a)      Section 5(b) of the Consulting Agreement is amended and
                  restated in its entirety to read as follows:

                  5.       Compensation

                           b. Coincident with the granting of stock options by
                  Duke Energy Corporation for the second quarter of 2002,
                  Contractor shall be granted a long term incentive award for
                  2002 in the form of the financial equivalent of Duke Energy
                  Corporation ("Duke Energy") stock options valued at
                  $387,500.00 (the "2002 Award"). On February 25, 2003,
                  Contractor shall be granted a long term incentive award for
                  2003 in the form of the financial equivalent of Duke Energy
                  stock-based incentives valued at $406,875.00 (the "2003
                  Award"). The 2002 Award shall consist of phantom stock options
                  and the 2003 Award shall be split equally between phantom
                  stock options and phantom performance shares. The granted
                  phantom stock options (the "Option Awards") shall be evidenced
                  by a Phantom Stock Option Agreement, substantially in the form
                  of attached Exhibit A, and the granted phantom performance
                  shares (the "Performance Award") shall be evidenced by a
                  Phantom Performance Award Agreement, substantially in the form
                  of attached Exhibit B. The Option Awards shall vest on
                  December 31, 2003 and shall be exercisable for thirty-six
                  months thereafter. The Performance Award

                                       1
<PAGE>

                  shall vest and be payable provided Duke Energy meets certain
                  performance criteria as set forth in the Phantom Performance
                  Award Agreement. If it is determined that such performance
                  criteria are met, the Performance Award shall be payable in
                  four yearly installments commencing February 25, 2005 through
                  February 25, 2008. The Option Awards shall only track the
                  performance of Duke Energy common stock and shall not entitle
                  Contractor to any of the voting rights of a shareholder of
                  Duke Energy.

         2. Ratification. Except as amended hereby, the Consulting Agreement
shall remain in full force and effect as previously executed by the parties, and
the parties hereby ratify the Consulting Agreement as amended hereby.

         3. Waiver of Breach. The waiver by any party to a breach of any
provision in this Amendment cannot operate or be construed as a waiver of any
subsequent breach by a party.

         4. Severability. The invalidity or unenforceability of any particular
provision of this Amendment shall not affect the other provisions hereof, and
this Amendment shall be construed in all respects as if the invalid or
unenforceable provision were omitted.

         5. Entire Agreement. Except as otherwise provided herein, this
Amendment and the Consulting Agreement contain the entire understanding of the
parties as to the agreement with Contractor, superseding all prior
understandings and agreements, and no modifications or amendments of the terms
and conditions set forth or referred to herein shall be effective unless in
writing and signed by the parties or their respective duly authorized agents.

         6. Governing Law. This Amendment shall be interpreted, construed and
governed according to the laws of the State of Colorado, without reference to
conflicts of law principles thereof.

         7. Dispute Resolution. In the event any dispute arises concerning the
provisions of this Amendment, the parties agree that such dispute shall be
resolved in accordance with the Consulting Dispute Resolution procedures of the
American Arbitration Association and that any arbitration pursuant to such
procedures shall be held in Denver, Colorado.

         8. Consent to Jurisdiction. Employee hereby consents to the
nonexclusive jurisdiction of any state court within Denver, Colorado or any
federal court located within the same city for any proceeding instituted
hereunder or arising out of or in connection with this Amendment.

         9. Successors and Assigns. This Amendment shall be binding upon and
inure to the benefit of the parties hereto and their permitted successors,
assigns, legal representatives and heirs, but neither this Amendment nor any
rights hereunder shall be assignable by Contractor.

                                       2
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Amendment as
of the day and year first above written.

                                  DUKE ENERGY FIELD SERVICES, LP

                                  By:      /s/ Jim W. Mogg
                                     ------------------------------------------
                                           Jim W. Mogg
                                           Chairman of the Board, President
                                           and Chief Executive Officer

                                  CONTRACTOR

                                  By:      /s/ William W. Slaughter
                                     ------------------------------------------
                                           William W. Slaughter

                                       3

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