<PAGE>
                                                                     EXHIBIT 4.2

================================================================================


                       ENTERPRISE PRODUCTS OPERATING L.P.

                                   AS ISSUER,

                        ENTERPRISE PRODUCTS PARTNERS L.P.

                                  AS GUARANTOR,

                                       and

                                 WACHOVIA BANK,
                              NATIONAL ASSOCIATION,

                                   AS TRUSTEE


                                   ----------


                          FIRST SUPPLEMENTAL INDENTURE

                          Dated as of January 22, 2003

                                       to

                      Indenture dated as of March 15, 2000


                                   ----------


                                  $350,000,000

                              Series A and Series B

                          6.375% Senior Notes due 2013


================================================================================


<PAGE>


                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                     PAGE
                                                                                                     ----
<S>             <C>                                                                                  <C>
                                                ARTICLE I
                                                THE NOTES

SECTION 1.1     Form...................................................................................2
SECTION 1.2     Title, Amount and Payment of Principal and Interest....................................2
SECTION 1.3     Registrar and Paying Agent.............................................................3
SECTION 1.4     Transfer and Exchange..................................................................3
SECTION 1.5     Legends................................................................................4
SECTION 1.6     Registration Rights Agreement..........................................................6
SECTION 1.7     Guarantee of the Notes.................................................................6
SECTION 1.8     Defeasance and Discharge...............................................................7

                                                ARTICLE II
                                                REDEMPTION

SECTION 2.1     Optional Redemption....................................................................7

                                               ARTICLE III
                                         MISCELLANEOUS PROVISIONS

SECTION 3.1     Table of Contents, Headings, etc.......................................................7
SECTION 3.2     Counterpart Originals..................................................................7
SECTION 3.3     Governing Law..........................................................................7


EXHIBIT A       Form of Note.........................................................................A-1
EXHIBIT B       Form of Certificate to be Delivered Upon Exchange of Registration
                of Transfer Notes....................................................................B-1
EXHIBIT C       Form of Certificate to be Delivered in Connection with
                Transfers Pursuant to Regulation S...................................................C-1
</Table>


                                        i
<PAGE>


         FIRST SUPPLEMENTAL INDENTURE dated as of January 22, 2003, among
Enterprise Products Operating L.P., a Delaware limited partnership (the
"Issuer"), Enterprise Products Partners L.P., a Delaware limited partnership
(the "Guarantor"), and Wachovia Bank, National Association, a national banking
association and successor to First Union National Bank, as trustee (the
"Trustee"). Each capitalized term used but not defined in this First
Supplemental Indenture shall have the meaning assigned to such term in the
Original Indenture (as defined below).

                                    RECITALS:

         WHEREAS, the Issuer and the Guarantor have executed and delivered to
the Trustee an Indenture, dated as of March 15, 2000 (the "Original Indenture"
and as supplemented by this First Supplemental Indenture, the "Indenture"),
providing for the issuance by the Issuer from time to time of its unsecured
debentures, notes, bonds or other evidences of indebtedness to be issued in one
or more series unlimited as to principal amount (the "Debt Securities"), and the
guaranties by Guarantor of the Debt Securities (the "Guaranties");

         WHEREAS, the Issuer has duly authorized and desires to cause to be
issued pursuant to the Original Indenture and this First Supplemental Indenture
two series of Debt Securities designated the "6.375% Series A Senior Notes due
2013" (the "Series A Notes") and the "6.375% Series B Senior Notes due 2013"
(the "Series B Notes" and, together with the Series A Notes, the "Notes"), all
of such Notes to be guaranteed by the Guarantor as provided in Article XIV of
the Original Indenture;

         WHEREAS, the Issuer desires to cause the issuance of the Notes pursuant
to Sections 2.01 and 2.03 of the Original Indenture, which sections permit the
execution of indentures supplemental thereto to establish the form and terms of
Debt Securities of any series;

         WHEREAS, pursuant to Section 9.01 of the Original Indenture, the Issuer
and the Guarantor have requested that the Trustee join in the execution of this
First Supplemental Indenture to establish the form and terms of the Notes;

         WHEREAS, all things necessary have been done to make the Notes, when
executed by the Issuer and authenticated and delivered hereunder and under the
Original Indenture and duly issued by the Issuer, and the Guaranties, when the
Notes are duly issued by the Issuer, the valid obligations of the Issuer and the
Guarantor, respectively, and to make this First Supplemental Indenture a valid
agreement of the Issuer and the Guarantor enforceable in accordance with its
terms.

         NOW, THEREFORE, the Issuer, the Guarantor and the Trustee hereby agree
that the following provisions shall supplement the Original Indenture:


<PAGE>

                                    ARTICLE I
                                    THE NOTES

         SECTION 1.1 Form.

         The Notes and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit A to this First Supplemental Indenture,
which is hereby incorporated into this First Supplemental Indenture. The terms
and provisions contained in the Notes shall constitute, and are hereby expressly
made, a part of this First Supplemental Indenture and to the extent applicable,
the Issuer, the Guarantor and the Trustee, by their execution and delivery of
this First Supplemental Indenture, expressly agree to such terms and provisions
and to be bound thereby.

         The Series A Notes and the Series B Notes shall be treated as a single
series of Debt Securities for purposes of determining whether Holders of the
requisite principal amount of Notes have given any notice, consent or waiver or
taken any other action permitted under the Indenture.

         The Notes shall be issued only as Registered Securities. The Notes
shall be issued upon original issuance in whole in the form of one or more
Global Securities (the "Book-Entry Notes"). Each Book-Entry Note shall represent
such of the Outstanding Notes as shall be specified therein and shall provide
that it shall represent the aggregate amount of Outstanding Notes from time to
time endorsed thereon and that the aggregate amount of Outstanding Notes
represented thereby may from time to time be reduced or increased, as
appropriate, to reflect exchanges and redemptions. Any endorsement of a
Book-Entry Note to reflect the amount, or any increase or decrease in the
amount, of Outstanding Notes represented thereby shall be made by the Trustee in
accordance with written instructions or such other written form of instructions
as is customary for the Depositary, from the Depositary or its nominee on behalf
of any Person having a beneficial interest in the Book-Entry Note.

         The Issuer initially appoints The Depository Trust Company to act as
Depositary with respect to the Book-Entry Notes.

         SECTION 1.2 Title, Amount and Payment of Principal and Interest.

         The Series A Notes shall be entitled the "6.375% Series A Senior Notes
due 2013," and the Series B Notes shall be entitled the "6.375% Series B Senior
Notes due 2013." The Trustee shall authenticate and deliver (i) Series A Notes
for original issue on the Issue Date (the "Original Series A Notes") in the
aggregate principal amount of $350,000,000, (ii) additional Series A Notes for
original issue from time to time after the Issue Date in such principal amounts
as may be specified in the Company Order described in this sentence and (iii)
Series B Notes for original issue from time to time thereafter for issue only in
exchange for a like principal amount of Series A Notes, in each case upon a
Company Order for the authentication and delivery thereof and satisfaction of
the other provisions of Section 2.05 of the Indenture. Such order shall specify
the amount of the Notes to be authenticated, the date on which the original
issue of Notes is to be authenticated, whether the Notes are Series A Notes or
Series B Notes, and the name or names of the initial Holder or Holders. The
aggregate principal amount of Notes that may be outstanding at any time may not
exceed $350,000,000 plus such additional principal amounts as may be issued and
authenticated pursuant to clause (ii) of this paragraph (except as provided in
Section 2.09 of the Indenture).

         The principal amount of each Note shall be payable on February 1, 2013.
Each Series A Note shall bear interest from the date of original issuance, or
the most recent date to which


                                       2
<PAGE>

interest has been paid, at the fixed rate of 6.375% per annum. Each Series B
Note shall bear interest at the same rate from the most recent date to which
interest shall have been paid on the Series A Note for which such Series B Note
was exchanged or, if no interest shall have been paid on such Series A Note,
then from the date of original issuance of such Series A Note. The dates on
which interest on the Notes shall be payable shall be February 1 and August 1 of
each year, commencing August 1, 2003 in the case of the Original Series A Notes
(the "Interest Payment Dates"). The regular record date for interest payable on
the Notes on any Interest Payment Date shall be the January 15 or July 15 (the
"Regular Record Date"), as the case may be, next preceding such Interest Payment
Date.

         Payments of principal of, premium, if any, and interest due on the
Notes representing Book-Entry Notes on any Interest Payment Date or at maturity
will be made available to the Trustee by 11:00 a.m., New York City time, on such
date, unless such date falls on a day which is not a Business Day, in which case
such payments will be made available to the Trustee by 11:00 a.m., New York City
time, on the next Business Day. As soon as possible thereafter, the Trustee will
make such payments to the Depositary.

         SECTION 1.3 Registrar and Paying Agent.

         The Issuer initially appoints the Trustee as Registrar and paying agent
with respect to the Notes. The office where Notes may be presented for
registration of transfer or exchange and the Place of Payment for the Notes
shall initially be the corporate trust office of the Trustee in the Borough of
Manhattan, The City of New York.

         SECTION 1.4 Transfer and Exchange.

              (i) Transfer and Exchange of Notes in Definitive Form. In addition
to the requirements set forth in Section 2.07 of the Original Indenture, Notes
in definitive form that are Registrable Securities under the Registration Rights
Agreement referred to in Section 1.6 hereof (the "Transfer Restricted
Securities") presented or surrendered for registration of transfer or exchange
pursuant to Section 2.07 of the Original Indenture shall be accompanied by the
following additional information and documents, as applicable, upon which the
Registrar may conclusively rely:

                  (a) if such Transfer Restricted Securities are being delivered
         to the Registrar by a Holder for registration in the name of such
         Holder, without transfer, a certification from such Holder to that
         effect (in substantially the form of Exhibit B hereto); or

                  (b) if such Transfer Restricted Securities are being
         transferred (1) to a "qualified institutional buyer" (as defined in
         Rule 144A under the Securities Act) in accordance with Rule 144A under
         the Securities Act or (2) pursuant to an exemption from registration in
         accordance with Rule 144 under the Securities Act (and based upon an
         opinion of counsel if the Issuer or the Trustee so requests) or (3)
         pursuant to an effective registration statement under the Securities
         Act, a certification to that effect from such Holder (in substantially
         the form of Exhibit B hereto); or


                                       3
<PAGE>

                  (c) if such Transfer Restricted Securities are being
         transferred pursuant to an exemption from registration in accordance
         with Rule 904 of Regulation S under the Securities Act, certifications
         to that effect from such Holder (in substantially the form of Exhibits
         B and C hereto) and an opinion of counsel to that effect if the Issuer
         or the Trustee so requests; or

                  (d) if such Transfer Restricted Securities are being
         transferred in reliance on and in compliance with another exemption
         from the registration requirements of the Securities Act, a
         certification to that effect from such Holder (in substantially the
         form of Exhibit B hereto) and an opinion of counsel to that effect if
         the Issuer or the Trustee so requests.

              (ii) Transfer and Exchange of Global Notes. The transfer and
exchange of Notes or beneficial interests therein shall be effected through the
Depositary, in accordance with Section 2.15 of the Original Indenture and
Article I of this First Supplemental Indenture (including the restrictions on
transfer set forth therein and herein) and the rules and procedures of the
Depositary therefor, which shall include restrictions on transfer comparable to
those set forth therein and herein to the extent required by the Securities Act
of 1933, as amended.

         SECTION 1.5 Legends.

              (i) Except as permitted by the following paragraphs (ii) and (iii)
immediately below, each certificate evidencing the Book-Entry Notes and Notes in
definitive form (and all Notes issued in exchange therefor or substitution
thereof) shall bear a legend in substantially the following form:

         THE ISSUANCE AND SALE OF THIS SECURITY (AND ANY GUARANTEE HEREOF) HAVE
         NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
         "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS AND NEITHER THIS
         SECURITY (NOR ANY GUARANTEE HEREOF) NOR ANY INTEREST OR PARTICIPATION
         HEREIN (OR THEREIN) MAY BE OFFERED, SOLD, ASSIGNED, TRANSFERRED,
         PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH
         REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT SUBJECT
         TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OR ANY
         APPLICABLE STATE SECURITIES LAWS.

         THE HOLDER HEREOF, BY ITS ACCEPTANCE OF THIS SECURITY, AGREES FOR THE
         BENEFIT OF THE ISSUER THAT THIS SECURITY MAY NOT BE OFFERED, SOLD,
         PLEDGED OR OTHERWISE TRANSFERRED PRIOR TO THE EXPIRATION OF THE HOLDING
         PERIOD APPLICABLE THERETO UNDER RULE 144(K) UNDER THE SECURITIES ACT
         WHICH IS APPLICABLE TO THIS SECURITY (THE "RESALE RESTRICTION
         TERMINATION DATE") OTHER THAN (1) TO THE ISSUER OR ITS SUBSIDIARIES,
         (2) SO LONG AS THIS SECURITY IS ELIGIBLE FOR RESALE PURSUANT TO RULE
         144A UNDER THE SECURITIES ACT


                                       4
<PAGE>

         ("RULE 144A"), TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A
         "QUALIFIED INSTITUTIONAL BUYER" WITHIN THE MEANING OF RULE 144A
         PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED
         INSTITUTIONAL BUYER, IN EACH CASE TO WHOM NOTICE IS GIVEN THAT THE
         RESALE, PLEDGE OR OTHER TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A
         (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE CERTIFICATE
         OF TRANSFER, IF APPLICABLE), (3) TO A NON-"U.S. PERSON" IN AN "OFFSHORE
         TRANSACTION" (AS SUCH TERMS ARE DEFINED IN REGULATION S UNDER THE
         SECURITIES ACT) IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES
         ACT (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE
         CERTIFICATE OF TRANSFER, IF APPLICABLE), (4) PURSUANT TO ANY OTHER
         AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
         SECURITIES ACT, INCLUDING THE EXEMPTION PROVIDED BY RULE 144 UNDER THE
         SECURITIES ACT, IF AVAILABLE, IN EACH CASE IN A MINIMUM PRINCIPAL
         AMOUNT OF $1,000, OR (5) PURSUANT TO AN EFFECTIVE REGISTRATION
         STATEMENT UNDER THE SECURITIES ACT, SUBJECT TO EACH OF THE FOREGOING
         CASES TO ANY REQUIREMENT OF LAW THAT THE DISPOSITION OF ITS PROPERTY OR
         THE PROPERTY OF SUCH INVESTOR ACCOUNT OR ACCOUNTS BE AT ALL TIMES
         WITHIN ITS OR THEIR CONTROL, AND SUBJECT TO THE RIGHT OF THE ISSUER OR
         THE TRUSTEE FOR THE SECURITIES PRIOR TO ANY SUCH SALE, PLEDGE OR OTHER
         TRANSFER TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL,
         CERTIFICATIONS AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM.
         THIS LEGEND WILL BE REMOVED UPON REQUEST OF THE HOLDER ON OR AFTER THE
         RESALE RESTRICTION TERMINATION DATE.

         In addition, if any of the Notes are issued in reliance on Regulation S
promulgated under the Securities Act, then such Notes shall also bear a legend
substantially in the following form:

         THIS NOTE IS A GLOBAL SECURITY ISSUED IN RELIANCE ON REGULATION S
         PROMULGATED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE
         "SECURITIES ACT"). PRIOR TO THE EXPIRATION OF THE DISTRIBUTION
         COMPLIANCE PERIOD WHICH SHALL EXTEND FOR A PERIOD OF FORTY (40) DAYS
         AFTER THE DATE ON WHICH THE NOTES EVIDENCED HEREBY ARE FIRST OFFERED TO
         PERSONS OTHER THAN DISTRIBUTORS IN RELIANCE ON REGULATION S OR THE DATE
         OF CLOSING OF THE OFFERING, WHICHEVER IS LATER, BENEFICIAL INTERESTS
         HEREIN MAY NOT BE HELD BY ANY PERSON OTHER THAN (1) A NON-U.S. PERSON
         OR (2) A U.S. PERSON WHO PURCHASED SUCH INTEREST IN A TRANSACTION
         EXEMPT FROM REGISTRATION UNDER THE SECURITIES ACT PURSUANT TO RULE 144A
         PROMULGATED THEREUNDER. BENEFICIAL INTERESTS HEREIN ARE NOT
         EXCHANGEABLE FOR


                                       5
<PAGE>

         PHYSICAL NOTES OTHER THAN IN ACCORDANCE WITH THE TERMS OF THE
         INDENTURE. THE TERMS IN THIS LEGEND ARE USED AS USED IN REGULATION S
         UNDER THE SECURITIES ACT.

              (ii) Upon any sale or transfer of a Transfer Restricted Security
(including any Transfer Restricted Security represented by a Book-Entry Note)
pursuant to Rule 144 under the Securities Act or an effective registration
statement under the Securities Act, which shall be certified to the Trustee and
Registrar upon which each may conclusively rely:

                  (a) in the case of any Transfer Restricted Security in
         definitive form, the Registrar shall permit the Holder thereof to
         exchange such Transfer Restricted Security for a Note in definitive
         form that does not bear the legend(s) set forth in (i) above and
         rescind any restriction on the transfer of such Transfer Restricted
         Security; and

                  (b) in the case of any Transfer Restricted Security
         represented by a Book-Entry Note, such Transfer Restricted Security
         shall not be required to bear the legend(s) set forth in (i) above if
         all other interests in such Global Note have been or are concurrently
         being sold or transferred pursuant to Rule 144 under the Securities Act
         or pursuant to an effective registration statement under the Securities
         Act, but such Transfer Restricted Security shall continue to be subject
         to the provisions of Section 2.15 of the Original Indenture and Section
         1.4(ii) of this First Supplemental Indenture.

              (iii) Notwithstanding the foregoing, upon consummation of the
Exchange Offer (as defined in the Registration Rights Agreement), the Issuer
shall issue and, upon receipt of a Company Order in accordance with Section 2.05
of the Original Indenture, the Trustee shall authenticate Series B Notes in
exchange for Series A Notes accepted for exchange in the Exchange Offer, which
Series B Notes shall not bear the legend(s) set forth in (i) above, and the
Registrar shall rescind any restriction on the transfer of such Series B Notes,
in each case unless the Holder of such Series A Notes is either (A) a
broker-dealer tendering Series A Notes acquired directly from the Issuer, (B) a
Person participating in the Exchange Offer for purposes of distributing the
Series B Notes or (C) a Person who is an "affiliate" (as defined in Rule 144
under the Securities Act) of the Issuer. The Issuer shall identify to the
Trustee such Holders of the Notes in a written certification signed by an
Officer of the General Partner and, absent certification from the Issuer to such
effect, the Trustee shall assume that there are no such Holders.

         SECTION 1.6 Registration Rights Agreement.

         Holders of the Notes shall have the benefit of the Company's
registration obligations with respect to the Notes under the Registration Rights
Agreement dated January 22, 2003 by and among the Issuer, the Guarantor and the
Initial Purchasers named therein.

         SECTION 1.7 Guarantee of the Notes.

         In accordance with Article XIV of the Original Indenture, the Notes
will be fully, unconditionally and absolutely guaranteed on an unsecured,
unsubordinated basis by the Guarantor.


                                       6
<PAGE>

         SECTION 1.8 Defeasance and Discharge.

         The Notes shall be subject to both legal defeasance and covenant
defeasance as contemplated by Article XI of the Original Indenture.

                                   ARTICLE II
                                   REDEMPTION

         SECTION 2.1 Optional Redemption.

         The Issuer shall have no obligation to redeem, purchase or repay the
Notes pursuant to any mandatory redemption, sinking fund or analogous provisions
or at the option of a Holder thereof. The Issuer, at its option, may redeem the
Notes in accordance with the provisions of paragraph 5 of the Notes and Article
III of the Original Indenture.

                                   ARTICLE III
                            MISCELLANEOUS PROVISIONS

         SECTION 3.1 Table of Contents, Headings, etc.

         The table of contents and headings of the Articles and Sections of this
First Supplemental Indenture have been inserted for convenience of reference
only, are not to be considered a part hereof and shall in no way modify or
restrict any of the terms or provisions hereof.

         SECTION 3.2 Counterpart Originals.

         The parties may sign any number of copies of this First Supplemental
Indenture. Each signed copy shall be an original, but all of them together
represent the same agreement.

         SECTION 3.3 Governing Law.

         THIS FIRST SUPPLEMENTAL INDENTURE AND THE NOTES SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.


                                       7
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this First
Supplemental Indenture to be duly executed as of the day and year first above
written.


                                    ENTERPRISE PRODUCTS OPERATING L.P.
                                             as Issuer


                                    By:  Enterprise Products GP, LLC
                                            its General Partner


                                    By:     /s/ Richard H. Bachmann
                                         Name:  Richard H. Bachmann
                                         Title: Executive Vice President



                                    ENTERPRISE PRODUCTS PARTNERS L.P.,
                                             as Guarantor


                                    By:  Enterprise Products GP, LLC
                                            its General Partner

                                    By:     /s/ Richard H. Bachmann
                                         Name:  Richard H. Bachmann
                                         Title: Executive Vice President



                                    WACHOVIA BANK,
                                    NATIONAL ASSOCIATION,
                                          as Trustee



                                    By:     /s/ R. Douglas Milner
                                         Name:  R. Douglas Milner
                                         Title: Vice President


                                       8
<PAGE>
                                                                       EXHIBIT A

                                  FORM OF NOTE

                               [FACE OF SECURITY]



[UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY ("DTC") (55 WATER STREET, ROOM 234, NEW YORK, NEW YORK
10041) TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR
PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR
SUCH OTHER NAME AS MAY BE REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND
ANY PAYMENT IS MADE TO CEDE & CO. OR SUCH OTHER ENTITY AS MAY BE REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]*

[TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT
NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S
NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO
TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE INDENTURE
REFERRED TO HEREIN.]*



                                                                Principal Amount
No. _____
                                              $___________, [which amount may be
                                          increased or decreased by the Schedule
               of Increases and Decreases in Global Security attached hereto. ]*


                       ENTERPRISE PRODUCTS OPERATING L.P.

                     6.375% SERIES __ SENIOR NOTES DUE 2013

                                                               CUSIP ___________

         ENTERPRISE PRODUCTS OPERATING L.P., a Delaware limited partnership (the
"Company," which term includes any successor under the Indenture hereinafter
referred to), for value received, hereby promises to pay to [Cede & Co.]* or its
registered assigns, the principal sum of __________________ ($ ) U.S. dollars,
[or such greater or lesser principal sum as is shown on the attached Schedule of
Increases and Decreases in Global Security]*, on February 1, 2013


----------

* To be included in a Book-Entry Note.


                                      A-1
<PAGE>

in such coin and currency of the United States of America as at the time of
payment shall be legal tender for the payment of public and private debts, and
to pay interest at an annual rate of 6.375% payable on February 1 and August 1
of each year, to the person in whose name the Security is registered at the
close of business on the record date for such interest, which shall be the
preceding January 15 and July 15 (each, a "Regular Record Date"), respectively,
payable commencing on August 1, 2003, with interest accruing from January 22,
2003, or the most recent date to which interest shall have been paid.

         Reference is made to the further provisions of this Security set forth
on the reverse hereof. Such further provisions shall for all purposes have the
same effect as though fully set forth at this place.

         The statements in the legends set forth above are an integral part of
the terms of this Security and by acceptance hereof the Holder of this Security
agrees to be subject to, and bound by, the terms and provisions set forth in
each such legend.

         This Security is issued in respect of a series of Debt Securities of an
initial aggregate of $350,000,000 in principal amount designated as the 6.375%
Series __ Senior Notes due 2013 of the Company and is governed by the Indenture
dated as of March 15, 2000, duly executed and delivered by the Company, as
issuer, and Enterprise Products Partners L.P., as guarantor (the "Guarantor") to
Wachovia Bank, National Association, as successor to First Union National Bank,
as trustee (the "Trustee"), as supplemented by the First Supplemental Indenture
dated as of January 22, 2003, duly executed by the Company, the Guarantor and
the Trustee (the "First Supplemental Indenture", and together with the
Indenture, the "Indenture"). The terms of the Indenture are incorporated herein
by reference. This Security shall in all respects be entitled to the same
benefits as definitive Securities under the Indenture.

         If and to the extent any provision of the Indenture limits, qualifies
or conflicts with any other provision of the Indenture that is required to be
included in the Indenture or is deemed applicable to the Indenture by virtue of
the provisions of the Trust Indenture Act of 1939, as amended (the "TIA"), such
required provision shall control.

         The Company hereby irrevocably undertakes to the Holder hereof to
exchange this Security in accordance with the terms of the Indenture without
charge.

         This Security shall not be valid or become obligatory for any purpose
until the Trustee's Certificate of Authentication hereon shall have been
manually signed by the Trustee under the Indenture.



                                      A-2
<PAGE>

         IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed by its sole General Partner.

Dated: January 22, 2003

                              ENTERPRISE PRODUCTS OPERATING L.P.

                              By:  Enterprise Products GP, LLC,
                                      its General Partner


                              By:
                                   ---------------------------------------------
                                   Name:
                                   Title:



TRUSTEE'S CERTIFICATE OF AUTHENTICATION:

         This is one of the Debt Securities of the series designated herein
referred to in the within-mentioned Indenture.

                                WACHOVIA BANK, NATIONAL ASSOCIATION,
                                as Trustee


                                By:
                                    --------------------------------------------
                                   Authorized Signatory


                                      A-3
<PAGE>

                              [REVERSE OF SECURITY]
                       ENTERPRISE PRODUCTS OPERATING L.P.

                     6.375% SERIES __ SENIOR NOTES DUE 2013

         This Security is one of a duly authorized issue of unsecured
debentures, notes or other evidences of indebtedness of the Company (the "Debt
Securities") of the series hereinafter specified, all issued or to be issued
under and pursuant to the Indenture, to which Indenture reference is hereby made
for a description of the rights, limitations of rights, obligations, duties and
immunities thereunder of the Trustee, the Company, the Guarantor and the Holders
of the Debt Securities. The Debt Securities may be issued in one or more series,
which different series may be issued in various aggregate principal amounts, may
mature at different times, may bear interest (if any) at different rates, may be
subject to different sinking, purchase or analogous funds (if any) and may
otherwise vary as provided in the Indenture. This Security is one of a series
designated as the 6.375% Series __ Senior Notes due 2013 of the Company, in
initial aggregate principal amount of $350,000,000 (the "Securities").

1.       Interest.

         The Company promises to pay interest on the principal amount of this
Security at the rate of 6.375% per annum.

         The Company will pay interest semi-annually on February 1 and August 1
of each year (each an "Interest Payment Date"), commencing August 1, 2003.
Interest on the Securities will accrue from the most recent date to which
interest has been paid or, if no interest has been paid on the Securities, from
January 22, 2003. Interest will be computed on the basis of a 360-day year
consisting of twelve 30-day months. The Company shall pay interest (including
post-petition interest in any proceeding under any applicable bankruptcy laws)
on overdue installments of interest (without regard to any applicable grace
period) and on overdue principal and premium, if any, from time to time on
demand at the same rate per annum, in each case to the extent lawful.

2.       Method of Payment.

         The Company shall pay interest on the Securities (except Defaulted
Interest) to the persons who are the registered Holders at the close of business
on the Regular Record Date immediately preceding the Interest Payment Date. Any
such interest not so punctually paid or duly provided for ("Defaulted Interest")
may be paid to the persons who are registered Holders at the close of business
on a special record date for the payment of such Defaulted Interest, or in any
other lawful manner not inconsistent with the requirements of any securities
exchange on which such Securities may then be listed if such manner of payment
shall be deemed practicable by the Trustee, as more fully provided in the
Indenture. The Company shall pay principal, premium, if any, and interest in
such coin or currency of the United States of America as at the time of payment
shall be legal tender for payment of public and private debts. Payments in
respect of a Global Security (including principal, premium, if any, and
interest) will be made by wire transfer of immediately available funds to the
accounts specified by the Depositary. Payments in respect of Securities in
definitive form (including principal, premium, if any, and


                                      A-4
<PAGE>

interest) will be made at the office or agency of the Company maintained for
such purpose within the Borough of Manhattan, The City of New York, which
initially will be at the corporate trust office of the Trustee located at 1 Penn
Plaza, Suite 1414, New York, New York 10119, or, at the option of the Company,
payment of interest may be made by check mailed to the Holders on the relevant
record date at their addresses set forth in the Debt Security Register of
Holders. The Holder must surrender this Security to a paying agent to collect
payment of principal.

3.       Paying Agent and Registrar.

         Initially, Wachovia Bank, National Association will act as paying agent
and Registrar. The Company may change any paying agent or Registrar at any time
upon notice to the Trustee and the Holders. The Company or any of its
Subsidiaries may, subject to certain exceptions, act as paying agent or
Registrar.

4.       Indenture.

         This Security is one of a duly authorized issue of Debt Securities of
the Company issued and to be issued in one or more series under the Indenture.

         Capitalized terms herein are used as defined in the Indenture unless
otherwise defined herein. The terms of the Securities include those stated in
the Indenture as originally executed those made part of the Indenture by
reference to the TIA, as in effect on the date of the Indenture, and those terms
stated in the First Supplemental Indenture. The Securities are subject to all
such terms, and Holders of Securities are referred to the Indenture as
originally executed, the First Supplemental Indenture and the TIA for a
statement of them. The Securities of this series are general unsecured
obligations of the Company limited to an initial aggregate principal amount of
$350,000,000; provided, however, that the authorized aggregate principal amount
of such series may be increased from time to time as provided in the First
Supplemental Indenture.

5.       Redemption.

         The Securities are redeemable, at the option of the Company, at any
time in whole, or from time to time in part, at a redemption price (the
"Make-Whole Price") equal to the greater of: (i) 100% of the principal amount of
the Securities to be redeemed; or (ii) the sum of the present values of the
remaining scheduled payments of principal and interest (at the rate in effect on
the date of calculation of the redemption price) on the Securities (exclusive of
interest accrued to the Redemption Date) discounted to the Redemption Date on a
semi-annual basis (assuming a 360-day year consisting of twelve 30-day months)
at the applicable Treasury Yield plus 30 basis points; plus, in either case,
accrued interest to the Redemption Date.

         Securities called for redemption become due on the Redemption Date.
Notices of redemption will be mailed at least 30 but not more than 60 days
before the Redemption Date to each Holder of the Securities to be redeemed at
its registered address. The notice of redemption for the Securities will state,
among other things, the amount of Securities to be redeemed, the Redemption
Date, the Make-Whole Price and the place(s) that payment will be made upon
presentation and surrender of Securities to be redeemed. Unless the Company
defaults in payment of the Make-Whole Price, interest will cease to accrue on
any Securities that have been called for redemption at the Redemption Date. If
less than all the Securities are redeemed at any


                                      A-5
<PAGE>

time, the Trustee will select the Securities to be redeemed on a pro rata basis
or by any other method the Trustee deems fair and appropriate.

         For purposes of determining the Make-Whole Price, the following
definitions are applicable:

         "Treasury Yield" means, with respect to any Redemption Date applicable
to the Securities, the rate per annum equal to the semi-annual equivalent yield
to maturity (computed as of the third Business Day immediately preceding such
Redemption Date) of the Comparable Treasury Issue, assuming a price for the
Comparable Treasury Issue (expressed as a percentage of its principal amount)
equal to the applicable Comparable Treasury Price for the Redemption Date.

         "Comparable Treasury Issue" means the United States Treasury security
selected by the Independent Investment Banker as having a maturity comparable to
the remaining term of the Securities that would be utilized, at the time of
selection and in accordance with customary financial practice, in pricing new
issues of corporate debt securities of comparable maturity to the remaining
terms of the Securities.

         "Independent Investment Banker" means Wachovia Securities, Inc. (and
its successors), or, if such firm is unwilling or unable to select the
applicable Comparable Treasury Issue, an independent investment banking
institution of national standing appointed by the Trustee and reasonably
acceptable to the Company.

         "Comparable Treasury Price" means, with respect to any Redemption Date,
(a) the bid price for the Comparable Treasury Issue (expressed as a percentage
of its principal amount) at 4:00 p.m. on the third Business Day preceding the
Redemption Date, as set forth on "Telerate Page 500" (or such other page as may
replace Telerate Page 500), or (b) if such page (or any successor page) is not
displayed or does not contain such bid prices at such time, the average of the
Reference Treasury Dealer Quotations obtained by the Trustee for the Redemption
Date.

         "Reference Treasury Dealer" means (a) Wachovia Securities, Inc. (and
its successors) and (b) one other primary U.S. government securities dealer in
New York City selected by the Independent Investment Banker (each, a "Primary
Treasury Dealer"); provided, however, that if either of the foregoing shall
cease to be a Primary Treasury Dealer, the Issuer will substitute therefor
another Primary Treasury Dealer.

         "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date for the Securities, an
average, as determined by the Trustee, of the bid and asked prices for the
Comparable Treasury Issue for the Securities (expressed in each case as a
percentage of its principal amount) quoted in writing to the Trustee by such
Reference Treasury Dealer at 5:00 p.m., New York City time, on the third
Business Day preceding such Redemption Date.

         Except as set forth above, the Securities will not be redeemable prior
to their Stated Maturity and will not be entitled to the benefit of any sinking
fund.


                                      A-6
<PAGE>

         The Securities may be redeemed in part in multiplies of $1,000 only.
Any such redemption will also comply with Article III of the Indenture.

6.       Denominations; Transfer; Exchange.

         The Securities are to be issued in registered form, without coupons, in
denominations of $1,000 and integral multiples of $1,000 in excess thereof. A
Holder may register the transfer of, or exchange, Securities in accordance with
the Indenture. The Registrar may require a Holder, among other things, to
furnish appropriate endorsements and transfer documents and to pay any taxes and
fees required by law or permitted by the Indenture.

7.       Person Deemed Owners.

         The registered Holder of a Security may be treated as the owner of it
for all purposes.

8.       Amendment; Supplement; Waiver.

         Subject to certain exceptions, the Indenture may be amended or
supplemented, and any existing Event of Default or compliance with any provision
may be waived, with the consent of the Holders of a majority in principal amount
of the Outstanding Debt Securities of each series affected. Without consent of
any Holder of a Security, the parties thereto may amend or supplement the
Indenture to, among other things, cure any ambiguity or omission, to correct any
defect or inconsistency, or to make any other change that does not adversely
affect the rights of any Holder of a Security. Any such consent or waiver by the
Holder of this Security (unless revoked as provided in the Indenture) shall be
conclusive and binding upon such Holder and upon all future Holders and owners
of this Security and any Securities which may be issued in exchange or
substitution herefor, irrespective of whether or not any notation thereof is
made upon this Security or such other Securities.

9.       Defaults and Remedies.

         If an Event of Default with respect to the Securities occurs and is
continuing, then in every such case the Trustee or the Holders of not less than
25% in principal amount of the Securities then Outstanding may declare the
principal amount of all the Securities to be due and payable immediately in the
manner and with the effect provided in the Indenture. Notwithstanding the
preceding sentence, however, if at any time after such a declaration of
acceleration has been made and before judgment or decree for payment of the
money due has been obtained by the Trustee as provided in the Indenture, the
Holders of a majority in principal amount of the Outstanding Securities, by
written notice to the Trustee, may rescind and annul such declaration and its
consequences if all Events of Default under the Indenture with respect to the
Securities, other than the nonpayment of the principal or interest which has
become due solely by such declaration acceleration, shall have been cured or
shall have been waived. No such rescission shall affect any subsequent default
or shall impair any right consequent thereon. Holders of Securities may not
enforce the Indenture or the Securities except as provided in the Indenture. The
Trustee may require indemnity satisfactory to it before it enforces the
Indenture or the Securities. Subject to certain limitations, Holders of a
majority in aggregate principal amount of the Securities then outstanding may
direct the Trustee in its exercise of any trust or power.


                                      A-7
<PAGE>

10.      Registration Rights

         The Holder of this Security is entitled to the benefits of the
Registration Rights Agreement (the "Registration Rights Agreement") dated as of
January 22, 2003, by and among the Company, the Guarantor and the Initial
Purchasers named therein. In certain events, the Company shall be required to
pay to each affected Holder additional interest on the Securities, on the terms
and subject to the conditions of the Registration Rights Agreement.

11.      Trustee Dealings with Company.

         The Trustee under the Indenture, in its individual or any other
capacity, may make loans to, accept deposits from, and perform services for the
Company or its Affiliates or any subsidiary of the Company's Affiliates, and may
otherwise deal with the Company or its Affiliates as if it were not the Trustee.

12.      Authentication.

         This Security shall not be valid until the Trustee signs the
certificate of authentication on the other side of this Security.

13.      Abbreviations and Defined Terms.

         Customary abbreviations may be used in the name of a Holder of a
Security or an assignee, such as: TEN COM (tenant in common), TEN ENT (tenants
by the entireties), JT TEN (joint tenants with right of survivorship and not as
tenants in common), CUST (Custodian), and U/G/M/A (Uniform Gifts to Minors Act).

14.      CUSIP Numbers.

         Pursuant to a recommendation promulgated by the Committee on Uniform
Note Identification Procedures, the Company has caused CUSIP numbers to be
printed on the Securities as a convenience to the Holders of the Securities. No
representation is made as to the accuracy of such number as printed on the
Securities and reliance may be placed only on the other identification numbers
printed hereon.

15.      Absolute Obligation.

         No reference herein to the Indenture and no provision of this Security
or the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of, premium, if any, and
interest on this Security in the manner, at the respective times, at the rate
and in the coin or currency herein prescribed.

16.      No Recourse.

         The General Partner and its directors, officers, employees and members,
as such, shall have no liability for any obligations of the Guarantor or the
Issuer under the Securities, the Indenture or the Guarantee or for any claim
based on, in respect of, or by reason of, such


                                      A-8
<PAGE>

obligations or their creation. Each Holder by accepting the Securities waives
and releases all such liability. The waiver and release are part of the
consideration for issuance of the Securities.

17.      Governing Law.

         This Security shall be construed in accordance with and governed by the
laws of the State of New York.

18.      Guarantee.

         The Securities are fully and unconditionally guaranteed on an
unsecured, unsubordinated basis by the Guarantor as set forth in Article XIV of
the Indenture, as noted in the Notation of Guarantee to this Security.


                                      A-9
<PAGE>

                              NOTATION OF GUARANTEE

         The Guarantor (which term includes any successor person under the
Indenture), has fully, unconditionally and absolutely guaranteed, to the extent
set forth in the Indenture and subject to the provisions in the Indenture, the
due and punctual payment of the principal of, and premium, if any, and interest
on the Securities and all other amounts due and payable under the Indenture and
the Securities by the Company.

         The obligations of the Guarantor to the Holders of Securities and to
the Trustee pursuant to the Guarantee and the Indenture are expressly set forth
in Article XIV of the Indenture and reference is hereby made to the Indenture
for the precise terms of the Guarantee.

                                           ENTERPRISE PRODUCTS PARTNERS, L.P.

                                           By:  Enterprise Products GP, LLC,
                                                     its General Partner


                                           By:
                                                --------------------------------
                                                Name:
                                                Title:



                                      A-10
<PAGE>

                                  ABBREVIATIONS

         The following abbreviations, when used in the inscription on the face
of this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM  - as tenants in common          UNIF GIFT MIN ACT -
                                                             -------------------
                                                                    (Cust.)
TEN ENT  - as tenants by entireties      Custodian for:
                                                       -------------------------
                                                                 (Minor)
                                         under Uniform Gifts to
JT TEN   - as joint tenants with         Minors Act of
           right of survivorship and                   -------------------------
           not as tenants in common                            (State)


              Additional abbreviations may also be used though not in the above
list.

                                   ----------

                                   ASSIGNMENT

         FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
       IDENTIFYING NUMBER OF ASSIGNEE


--------------------------------------



--------------------------------------------------------------------------------
   Please print or type name and address including postal zip code of assignee

--------------------------------------------------------------------------------


--------------------------------------------------------------------------------
the within Security and all rights thereunder, hereby irrevocably constituting
and appointing


--------------------------------------------------------------------------------
to transfer said Security on the books of the Company, with full power of
substitution in the premises.


Dated
      -------------------------------           --------------------------------
                                                               Registered Holder


                                      A-11
<PAGE>

                       SCHEDULE OF INCREASES OR DECREASES
                               IN GLOBAL SECURITY*

         The following increases or decreases in this Global Security have been
made:

<Table>
<Caption>
                                  AMOUNT OF                 AMOUNT OF            PRINCIPAL AMOUNT
                                 DECREASE IN               INCREASE IN            OF THIS GLOBAL           SIGNATURE OF
                                  PRINCIPAL             PRINCIPAL AMOUNT        SECURITY FOLLOWING      AUTHORIZED OFFICER
                                AMOUNT OF THIS               OF THIS               SUCH DECREASE           OF TRUSTEE OR
   DATE OF EXCHANGE            GLOBAL SECURITY           GLOBAL SECURITY           (OR INCREASE)            DEPOSITARY
   ----------------            ---------------          ----------------        ------------------      ------------------
<S>                            <C>                      <C>                     <C>                     <C>






</Table>


----------

* To be included in a Book-Entry Note.


                                      A-12
<PAGE>

                                                                       EXHIBIT B

                FORM OF CERTIFICATE TO BE DELIVERED UPON EXCHANGE
                      OR REGISTRATION OF TRANSFER OF NOTES

Re:      6.375% Senior Notes due 2013 of Enterprise Products Operating L.P.

         This Certificate relates to $_____ principal amount of Notes held in**
______ book-entry or **______ definitive form by _____________________ (the
"Transferor").

         The Transferor has requested the Trustee by written order to exchange
or register the transfer of a Note or Notes.

         In connection with such request and in respect of each such Note, the
Transferor does hereby certify that the Transferor is familiar with the
Indenture relating to the above-captioned Notes and that the transfer of this
Note does not require registration under the Securities Act (as defined below)
because:**

         [ ]      Such Note is being acquired for the Transferor's own account
without transfer.

         [ ]      Such Note is being transferred (i) to a "qualified
institutional buyer" (as defined in Rule 144A under the Securities Act of 1933,
as amended (the "Securities Act")), in accordance with Rule 144A under the
Securities Act or (ii) pursuant to an exemption from registration in accordance
with Rule 904 of Regulation S under the Securities Act (and in the case of
clause (ii), based upon an opinion of counsel if the Company or the Trustee so
requests, together with a certification in substantially the form of Exhibit C
to the Indenture).

         [ ]      Such Note is being transferred (i) pursuant to an exemption
from registration in accordance with Rule 144 under the Securities Act (and
based upon an opinion of counsel if the Company or the Trustee so requests) or
(ii) pursuant to an effective registration statement under the Securities Act.

         [ ]      Such Note is being transferred in reliance on and in
compliance with another exemption from the registration requirements of the
Securities Act (and based upon an opinion of counsel if the Company or the
Trustee so requests).

                                    [INSERT NAME OF TRANSFEROR]


                                    By:
                                        ---------------------------------------
                                    Name:
                                    Title:
                                    Address:

Date:
     -------------------


** Fill in blank or check appropriate box, as applicable.


                                      B-1
<PAGE>

                                                                       EXHIBIT C

                FORM OF CERTIFICATE TO BE DELIVERED IN CONNECTION
                     WITH TRANSFERS PURSUANT TO REGULATION S



                                                             _____________, ____

Wachovia Bank, National Association, as Registrar
[Address]
Attention: Corporate Trust Department

Ladies and Gentlemen:

         In connection with our proposed sale of certain 6.375% Senior Notes due
2013 (the "Notes") of Enterprise Products Operating L.P. (the "Company"), we
represent that:

         (i)      the offer of the Notes was not made to a person in the United
                  States;

         (ii)     at the time the buy order was originated, the transferee was
                  outside the United States or we and any person acting on our
                  behalf reasonably believed that the transferee was outside the
                  United States;

         (iii)    no directed selling efforts have been made by us in the United
                  States in contravention of the requirements of Rule 903(a) or
                  Rule 904(a) of Regulation S under the U.S. Securities Act of
                  1933, as applicable; and

         (iv)     the transaction is not part of a plan or scheme to evade the
                  registration requirements of the U.S. Securities Act of 1933.

         You and the Company are entitled to rely upon this letter and you are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby. Terms used in this certificate have the
meanings set forth in Regulation S under the U.S. Securities Act of 1933.

                                         Very truly yours,



                                         --------------------------------------
                                         [Name]

                                         By:
                                             ----------------------------------
                                             Name:
                                             Title:
                                             Address:


                                      C-1