FIRST AMENDMENT TO
                                CREDIT AGREEMENT

                                  BY AND AMONG

                       ENTERPRISE PRODUCTS OPERATING L.P.,

                               DEN NORSKE BANK ASA

                                       and

                 BANK OF TOKYO-MITSUBISHI, LTD., HOUSTON AGENCY,
                                as Co-Arrangers,

                            THE BANK OF NOVA SCOTIA,
                   as Co-Arranger and as Documentation Agent,

                            THE CHASE MANHATTAN BANK,
                          as Co-Arranger and as Agent,

                                       and

                           THE BANKS SIGNATORY HERETO


                          Effective as of July 28, 1999





                           TABLE OF CONTENTS


                             SECTION 1. DEFINITIONS


1.1  Terms Defined Above.......................................................1
1.2  Terms Defined in Credit Agreement.........................................1
1.3  Other Definitional Provisions............................................ 1

                SECTION 2. AMENDMENTS TO CREDIT AGREEMENT


2.1  Amendments and Supplements to Definitions.................................2
2.2  Amendments to Subsection 2.4..............................................5
2.3  Amendments to Section 4...................................................5
2.4  Amendments to Section 5...................................................7
2.5  Amendments to Section 6...................................................7
2.6  Amendments to Section 7...................................................8
2.7  Amendments to Section 11.................................................11

                          SECTION 3. CONDITIONS


3.1  Loan Documents...........................................................11
3.2  Company Proceedings of Loan Parties......................................12
3.3  Representations and Warranties...........................................12
3.4  No Default...............................................................12
3.5  No Change................................................................12
3.6  Other Instruments or Documents...........................................12
3.7  Events...................................................................12

                        SECTION 4. MISCELLANEOUS


4.1  Adoption, Ratification and Confirmation of Credit Agreement..............13
4.2  Successors and Assigns...................................................13
4.3  Counterparts.............................................................13
4.4  Number and Gender........................................................13
4.5  Entire Agreement.........................................................13
4.6  Invalidity...............................................................13
4.7  Titles of Articles, Sections and Subsections.............................13
4.8  Governing Law............................................................14


                               FIRST AMENDMENT TO
                                CREDIT AGREEMENT


     This FIRST AMENDMENT TO CREDIT AGREEMENT (this "First Amendment")  executed
effective as of the 28th day of July,  1999 (the  "Effective  Date"),  is by and
among ENTERPRISE PRODUCTS OPERATING L.P., a limited partnership formed under the
laws of the State of  Delaware  (the  "Company");  each of the  banks  that is a
signatory  hereto or which  becomes a  signatory  hereto and to the  hereinafter
described  Credit  Agreement  (individually,  together with its  successors  and
assigns, a "Bank" and, collectively, the "Banks"); THE CHASE MANHATTAN BANK, DEN
NORSKE  BANK ASA,  THE BANK OF NOVA SCOTIA and BANK OF  TOKYO-MITSUBISHI,  LTD.,
HOUSTON  AGENCY,  as  Co-Arrangers;  THE BANK OF NOVA SCOTIA,  as  Documentation
Agent;  and THE CHASE MANHATTAN BANK ("Chase"),  as Agent for the Banks (in such
capacity, together with its successors in such capacity, the "Agent").

                                R E C I T A L S:

     WHEREAS,  the Company, the Agent, the Documentation Agent and the Banks are
parties to that certain Credit  Agreement  dated as of July 27, 1998, as Amended
and Restated as of  September  30, 1998 (the  "Credit  Agreement"),  pursuant to
which the Banks  agreed to make loans to and  extensions  of credit on behalf of
the Company; and

     WHEREAS,  the Company and the Banks desire to amend the Credit Agreement in
the particulars hereinafter provided;

     NOW,  THEREFORE,  in consideration of the premises and the mutual covenants
herein contained, the parties hereto agree as follows:


                             SECTION 1. DEFINITIONS

     1.1 Terms Defined Above. As used in this First Amendment, each of the terms
"Bank",  "Banks",  "Company",  "Credit  Agreement",  "Effective Date" and "First
Amendment" shall have the meaning assigned to such term hereinabove.

     1.2 Terms  Defined  in Credit  Agreement.  Each term  defined in the Credit
Agreement and used herein without  definition shall have the meaning assigned to
such term in the Credit Agreement, unless expressly provided to the contrary.

     1.3 Other Definitional Provisions.

     (a) The words "hereby",  "herein",  "hereinafter",  "hereof",  "hereto" and
"hereunder"  when  used  in this  First  Amendment  shall  refer  to this  First
Amendment as a whole and not to any particular Article,  Section,  subsection or
provision  of  this  First  Amendment.  (b)  Section,   subsection  and  Exhibit
references  herein are to such Sections,  subsections and Exhibits to this First
Amendment unless otherwise specified.


                    SECTION 2. AMENDMENTS TO CREDIT AGREEMENT

     The  Company,  the Agent and the Banks agree that the Credit  Agreement  is
hereby   amended,   effective  as  of  the  Effective  Date,  in  the  following
particulars.

     2.1 Amendments and Supplements to Definitions.

     (a) The following terms,  which are defined in subsection 1.1 of the Credit
Agreement, are hereby amended in their entirety to read as follows:

     "Agreement":  this Credit Agreement,  as amended by the First Amendment and
as the same may from time to time be further amended, supplemented or modified.


     "Applicable Margin": for each Revolving Credit Loan, the rate per annum set
forth below:

     (a) if the Applicable  Margin  Certificate  required pursuant to subsection
6.1(c)  for  any  fiscal   quarter   of  the   Company   shows  that  the  Total
Indebtedness/EBITDA  Ratio on the last day of such fiscal  quarter was less than
or equal to 1.5 to 1, then the Applicable Margin, during the period beginning on
(and  including)  the date on  which  such  Applicable  Margin  Certificate  was
delivered by the Company to the Banks and ending on (and  excluding) the date on
which the next Applicable Margin  Certificate is delivered by the Company to the
Banks pursuant to subsection 6.1(c), shall be (i) with respect to Alternate Base
Rate Loans, 0% and (ii) with respect to Eurodollar Loans, .75%; and

     (b) if the Applicable  Margin  Certificate  required pursuant to subsection
6.1(c)  for  any  fiscal   quarter   of  the   Company   shows  that  the  Total
Indebtedness/EBITDA  Ratio on the last day of such  fiscal  quarter  was greater
than 1.5 to 1 and less  than or equal to 2.0 to 1, then the  Applicable  Margin,
during the period beginning on (and including) the date on which such Applicable
Margin  Certificate was delivered by the Company to the Banks and ending on (and
excluding) the date on which the next Applicable Margin Certificate is delivered
by the Company to the Banks  pursuant to  subsection  6.1(c),  shall be (i) with
respect to Alternate  Base Rate Loans,  0% and (ii) with  respect to  Eurodollar
Loans, 1.00%;

     (c) if the Applicable  Margin  Certificate  required pursuant to subsection
6.1(c)  for  any  fiscal   quarter   of  the   Company   shows  that  the  Total
Indebtedness/EBITDA  Ratio on the last day of such  fiscal  quarter  was greater
than 2.0 to 1 and less  than or equal to 2.5 to 1, then the  Applicable  Margin,
during the period beginning on (and including) the date on which such Applicable
Margin  Certificate was delivered by the Company to the Banks and ending on (and
excluding) the date on which the next Applicable Margin Certificate is delivered
by the Company to the Banks  pursuant to  subsection  6.1(c),  shall be (i) with
respect to Alternate  Base Rate Loans,  .25% and (ii) with respect to Eurodollar
Loans, 1.25%;

     (d) if the Applicable  Margin  Certificate  required pursuant to subsection
6.1(c)  for  any  fiscal   quarter   of  the   Company   shows  that  the  Total
Indebtedness/EBITDA  Ratio on the last day of such  fiscal  quarter  was greater
than 2.5 to 1, then the Applicable  Margin,  during the period beginning on (and
including) the date on which such Applicable Margin Certificate was delivered by
the  Company  to the Banks and ending on (and  excluding)  the date on which the
next  Applicable  Margin  Certificate  is  delivered by the Company to the Banks
pursuant to subsection 6.1(c),  shall be (i) with respect to Alternate Base Rate
Loans, .50% and (ii) with respect to Eurodollar Loans, 1.50%;

     provided,  however,  if the Company  shall fail to deliver  the  Applicable
Margin Certificate by the end of the fiscal quarter in which it is required, the
Applicable Margin for the next fiscal quarter shall be as provided in clause (d)
above; provided further, however, that the Applicable Margin for the period from
the Closing Date until (and excluding) the date on which the Company delivers to
the Banks the  Applicable  Margin  Certificate  for the  fiscal  quarter  of the
Company ended  September 30,  1999,  shall be (i) with respect to Alternate Base
Rate Loans,  .50% and (ii) with  respect to Eurodollar  Loans,  1.50%;  provided
further, however, that when the Company or the Limited Partner receives a senior
unsecured debt rating of at least BBB- from Standard & Poor's Ratings  Services,
a division of McGraw-Hill,  Inc. ("Standard & Poor's"),  and a debt rating of at
least Baa3 from Moody's  Investors  Service,  Inc.  ("Moody's"),  the Applicable
Margin with respect to Eurodollar  Loans shall be reduced by .125%;  and, in the
event the senior  unsecured  debt  rating is greater  than BBB- from  Standard &
Poor's and Baa3 from Moody's,  the Applicable  Margin with respect to Eurodollar
Loans shall be reduced by .250%.  Each such reduction  shall be effective on the
next Business Day following the date the applicable rating is achieved and shall
be reversed on the next  Business Day  following any downgrade of any one of the
ratings below the levels aforementioned.


     "Change of Control": any of the following events:

     (1) Dan Duncan  (his wife,  descendants  and trusts for the  benefit of his
wife and/or descendants and the heirs,  legatees and distributees of his estate)
shall  cease  to own,  directly  or  indirectly,  (A) at  least  51% (on a fully
converted, fully diluted basis) of the economic interest in the Capital Stock of
EPCO or (B) an aggregate number of shares of Capital Stock of EPCO sufficient to
elect a majority of the board of directors of EPCO;

     (2) EPCO  shall  cease to own 100% of the issued  and  outstanding  Capital
Stock of EPC Partners II, Inc. ("EPC II");

     (3) EPC II (or another wholly owned  Subsidiary of EPCO) shall cease to own
at least 65% of the outstanding membership interests in the General Partner;

     (4) EPC II shall fail to own at least a majority of the outstanding  Common
Units;

     (5) 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  EPC II and Shell Oil Company and any of its  Affiliates  acquiring or
owning an interest in any of the  special  units of the Limited  Partner (or the
Common Units into which any of such special units are  converted)  issued by the
Limited  Partner in connection  with the Tejas  Acquisition,  shall  become,  or
obtain  rights  (whether by means of 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 Units;

     (6) the  General  Partner  shall  cease to be the  general  partner  of the
Limited Partner or the Company; or

     (7) the Limited  Partner shall cease to be the sole limited  partner of the
Company.


     "EBITDA":  shall mean, for any period, the sum (without duplication) of (i)
operating  income of the Company,  and its  consolidated  Subsidiaries  for such
period plus (ii) depreciation and amortization for such period to the extent not
already  included in the  calculation  of operating  income plus (iii)  interest
income  during  such  period  (excluding  interest  income in respect of the BEF
Participation  and the MBA  Participation),  plus  (iv)  cash  distributions  or
dividends  received  by the  Company  during  such  period  from  unconsolidated
entities  (including,   without  limitation,   unconsolidated   Permitted  Joint
Ventures),  plus (v) other cash  income  received  by the  Company  during  such
period,  plus (vi) interest and principal  payments received by the Company with
respect  to the  BEF  Participation  and  the  MBA  Participation,  minus  (vii)
operating  lease  expense for such period to the extent not already  deducted in
the calculation of operating income,  determined in each case, on a consolidated
basis in accordance with GAAP;  provided,  however,  EBITDA (x) will not include
any extraordinary, unusual or non-recurring gains or losses from asset sales and
(y) will be adjusted from time to time for cash flows from  acquisitions,  which
cash flows  shall be added on a pro forma basis to each of the prior four fiscal
quarters.


     "Net Cash  Proceeds":  in connection with the issuance of Debt permitted by
subsection  7.1(j),  the cash proceeds  received from the issuance of such Debt,
net of all applicable attorney's fees, investment banking fees, accountant fees,
underwriting  discounts,  commissions  and  other  customary  fees and  expenses
actually incurred in connection therewith.

     "Revolving Credit Commitment Termination Date": the earlier of (a) July 26,
2000, or (b) the date the Revolving Credit  Commitments are terminated  pursuant
to  the  provisions  of  this  Agreement,   including  without  limitation,  the
provisions of subsection 4.1(a).

     (b)  Subsection 1.1 of the Credit  Agreement is hereby further  amended and
supplemented  by adding  the  following  new  definitions  where  alphabetically
appropriate, which read in their entirety as follows:

     "First  Amendment":  the First  Amendment to Credit  Agreement  dated as of
July 28,  1999, by and among the Company, the Agent, the Documentation Agent and
the Banks.

     "Tejas Acquisition":  the acquisition by the Company directly or indirectly
of the natural gas processing assets and other midstream assets of Tejas Natural
Gas Liquids, LLC.

     2.2 Amendments to Subsection 2.4. Subsection 2.4(b) of the Credit Agreement
is hereby deleted in its entirety.

     2.3 Amendments to Section 4.

     (a)  Subsection  4.1 of the  Credit  Agreement  is  hereby  amended  in its
entirety to read as follows:

          "4.1  Prepayments.  (a)  Mandatory  Prepayments.  If on any  date  the
     Company shall receive Net Cash Proceeds from the issuance of Debt permitted
     by subsection 7.1(j),  then 100% of such Net Cash Proceeds shall be applied
     on such date  toward the  payment in full of all  Indebtedness,  including,
     without  limitation,  all  principal,  interest  and fees owing  under this
     Agreement,  the Revolving Credit Notes or any other Loan Document until all
     of same shall be paid in full.  Simultaneously  with such  payment in full,
     the Revolving Credit Commitments shall be terminated.

     (b) Optional  Prepayments.  The Company may on the last day of the relevant
Interest  Period if the Revolving  Credit Loans to be prepaid are in whole or in
part  Eurodollar  Loans,  or at any time and from time to time if the  Revolving
Credit Loans to be prepaid are Alternate  Base Rate Loans,  prepay the Revolving
Credit Loans, in whole or in part, without premium or penalty, upon at least (i)
three Working Days'  irrevocable  notice,  in the case of Eurodollar  Loans, and
(ii) one Business Day's  irrevocable  notice, in the case of Alternate Base Rate
Loans,  in each case to the Agent,  specifying the date and amount of prepayment
and whether the  prepayment  is of Working  Capital  Revolving  Credit  Loans or
Investment  Revolving  Credit Loans and whether of Eurodollar Loans or Alternate
Base Rate Loans or a combination  thereof,  and if of a combination thereof, the
amount of  prepayment  allocable to each.  Upon receipt of such notice the Agent
shall promptly  notify each Bank thereof.  If such notice is given,  the Company
shall make such prepayment and the payment amount specified in such notice shall
be due and payable on the date specified therein, together with accrued interest
to such date on the amount prepaid.


     (c) Each optional partial prepayment of the Revolving Credit Loans pursuant
to Subsection 4.1(b) shall be in an aggregate  principal amount of $1,000,000 or
a whole multiple of $1,000,000 in excess thereof."

     (b)  Subsection  4.2 of the  Credit  Agreement  is  hereby  amended  in its
entirety to read as follows:

          "4.2 Commitment  Fees. The Company agrees to pay to the Agent, for the
     account of each Bank,  commitment fees with respect to the Revolving Credit
     Commitment  of such Bank for the period from and  including  the  Effective
     Date  of  the  First  Amendment  to  and  including  the  Revolving  Credit
     Termination  Date,  calculated  at the  following  rates  per  annum on the
     average daily Available  Revolving Credit  Commitment of such Bank for each
     day  during the period  for which the  commitment  fee with  respect to the
     Revolving Credit Commitments is being paid:

          (i)  if  the  Applicable  Margin  Certificate   required  pursuant  to
     subsection  6.1(c) for any fiscal  quarter of the Company ending after June
     30, 1999 shows that the Total  Indebtedness/EBITDA Ratio on the last day of
     such fiscal quarter was less than or equal to 1.5 to 1, then the commitment
     fee for the Revolving  Credit  Commitment,  during the period  beginning on
     (and  including) the date on which such Applicable  Margin  Certificate was
     delivered  by the  Company to the Banks and ending on (and  excluding)  the
     date on which the next  Applicable  Margin  Certificate is delivered by the
     Company to the Banks pursuant to subsection 6.1(c), shall be .25%;

          (ii)  if  the  Applicable  Margin  Certificate  required  pursuant  to
     subsection  6.1(c) for any fiscal  quarter of the Company ending after June
     30, 1999 shows that the Total  Indebtedness/EBITDA Ratio on the last day of
     such fiscal quarter was greater than 1.5 to 1 and less than or equal to 2.0
     to 1, then the commitment fee for the Revolving Credit  Commitment,  during
     the period  beginning on (and  including) the date on which such Applicable
     Margin  Certificate was delivered by the Company to the Banks and ending on
     (and excluding) the date on which the next Applicable Margin Certificate is
     delivered by the Company to the Banks pursuant to subsection 6.1(c),  shall
     be .30%;

          (iii)  if the  Applicable  Margin  Certificate  required  pursuant  to
     subsection  6.1(c) for any fiscal  quarter of the Company ending after June
     30, 1999 shows that the Total  Indebtedness/EBITDA Ratio on the last day of
     such fiscal quarter was greater than 2.0 to 1 and less than or equal to 2.5
     to 1, then the commitment fee for the Revolving Credit  Commitment,  during
     the period  beginning on (and  including) the date on which such Applicable
     Margin  Certificate was delivered by the Company to the Banks and ending on
     (and excluding) the date on which the next Applicable Margin Certificate is
     delivered by the Company to the Banks pursuant to subsection 6.1(c),  shall
     be .375%;

          (iv)  if  the  Applicable  Margin  Certificate  required  pursuant  to
     subsection  6.1(c) for any fiscal quarter of the Company ending after [June
     30, 1999] shows that the Total Indebtedness/EBITDA Ratio on the last day of
     such fiscal  quarter was greater than 2.5 to 1, then the commitment fee for
     the  Revolving  Credit  Commitment,  during  the period  beginning  on (and
     including)  the  date on  which  such  Applicable  Margin  Certificate  was
     delivered  by the  Company to the Banks and ending on (and  excluding)  the
     date on which the next  Applicable  Margin  Certificate is delivered by the
     Company to the Banks pursuant to subsection 6.1(c), shall be .50%;

          provided,  that the commitment fee for the Revolving Credit Commitment
     for the period  from the  Closing  Date until (and  excluding)  the date on
     which the Company delivers to the Banks the Applicable  Margin  Certificate
     for the fiscal  quarter of the Company ended  September 30, 1999,  shall be
     .50%;  provided,  further,  if  the  Company  shall  fail  to  deliver  the
     Applicable Margin  Certificate by the end of the fiscal quarter in which it
     is required, the commitment fee for the Revolving Credit Commitment for the
     next fiscal quarter shall be as provided in clause (iv) above.


     The commitment fees with respect to the Revolving Credit  Commitments shall
be payable  quarterly in arrears on the last  Business Day of each March,  June,
September and  December,  commencing  September  30, 1999,  and on the Revolving
Credit Termination Date or such earlier date as the Revolving Credit Commitments
shall terminate as provided herein."

     (c)  Subsection  4.6  of  the  Credit   Agreement  is  hereby  amended  and
supplemented  by  the  addition  of a new  sentence  to  appear  at  the  end of
subsection 4.6(d) which shall read in its entirety as follows:

     "If all or any portion of interest due on any of the Revolving Credit Loans
shall not be paid when due (whether at the stated  maturity,  by acceleration or
otherwise)  or if all or any  portion  of any fee due in  connection  with  this
Agreement or any of the Revolving  Credit Loans shall not be paid when due, then
any such  overdue  amount  shall bear  interest  at a rate per annum which is 2%
above the Alternate Base Rate plus the  Applicable  Margin from the date of such
non-payment until paid in full (as well as after as before judgment)."

     2.4 Amendments to Section 5.  Subsection 5.22 is hereby amended by deleting
the date "March 31, 1999" therefrom and substituting therefor the date September
30, 1999".

     2.5  Amendments to Section 6.  Subsection  6.1(c) is hereby  amended in its
entirety to read as follows: "6.1(c) Applicable Margin Certificates.  (i) Within
45 days after the end of each fiscal  quarter of the Company,  a certificate  of
the  principal   financial   officer  of  the  Company  showing  in  detail  the
computations necessary to calculate the Applicable Margin (an "Applicable Margin
Certificate"),  and (ii) an Applicable Margin Certificate as soon as practicable
following the obtaining of, and each change in, a current senior  unsecured debt
rating referenced in the last proviso contained in the definition of "Applicable
Margin" set forth in subsection 1.1."

     2.6 Amendments to Section 7.

     (a) Subsection 7.1 of the Credit Agreement is hereby amended as follows:

     (i) Clause (g) of  subsection  7.1 is hereby  amended by deleting  the word
"and" found at the end thereof.

     (ii)  Clause  (h) of  subsection  7.1 is hereby  amended  by  deleting  the
period(.) found at the end thereof and substituting therefor ";".

     (iii)  Subsection 7.1 is hereby amended and  supplemented by adding thereto
two (2) new  clauses,  to be clauses  (i) and (j)  reading in their  entirety as
follows:

          "(i) Debt arising out of or pursuant to that certain Credit  Agreement
     dated July 28, 1999,  by and among the  Company,  the Agent and the several
     banks  party  thereto,  as the  same may from  time to time be  amended  or
     supplemented,  up to the aggregate  principal amount of $350,000,000 at any
     one time outstanding; and


          (j) Debt  arising out of or pursuant to the issuance by the Company of
     senior  unsecured notes up to and including the aggregate  principal amount
     of  $350,000,000,  the Net  Cash  Proceeds  of  which  shall be used by the
     Company to make the mandatory prepayment required by subsection 4.1(a).

     (b) Subsection 7.2 of the Credit Agreement is hereby amended as follows:

          (i) Clause (b) of  subsection  7.2 is hereby  amended by deleting  the
     word "and" found at the end thereof.

          (ii) Clause (c) of  subsection  7.2 is hereby  amended by deleting the
     period (.) found at the end thereof and substituting therefor "; and".

          (iii)  Subsection  7.2 is hereby  amended and  supplemented  by adding
     thereto a new clause (d), reading in its entirety as follows:

          "(d)  Liens  relating  to the  obligations  under the Lease  Agreement
     referenced  in subsection  7.1(g) and the sublease  between the Company and
     EPCO pertaining thereto."

     (c) Subsection 7.3 of the Credit Agreement is hereby amended as follows:

          (i) Clause (a) of  subsection  7.3 is hereby  amended by deleting  the
     word "and" found at the end thereof.

          (ii) Clause (b) of  subsection  7.3 is hereby  amended by deleting the
     period (.) found at the end thereof and substituting therefor "; and".

          (iii)  Subsection  7.3 is hereby  amended and  supplemented  by adding
     thereto a new clause (c), reading in its entirety as follows:

          "(c)  the  Company  and any  Subsidiary  may  enter  the  natural  gas
     processing business generally as well as through and in connection with the
     Tejas Acquisition."

     (d)  Subsection  7.5  of  the  Credit   Agreement  is  hereby  amended  and
supplemented by adding thereto at the end thereof a new clause (iii), reading in
its entirety as follows:

          "and (iii) as long as no Default or Event of Default has  occurred and
     is continuing or would result  therefrom,  the Company may make  Restricted
     Payments to the Limited  Partner and the General  Partner  (but only if the
     General  Partner  thereupon  contributes  such Common  Units to the Limited
     Partner) in the form of Common  Units for purposes in  connection  with the
     Limited  Partner's  employee  deferred  compensation  plan,  not to  exceed
     500,000 Common Units in the aggregate."

     (e) Subsection 7.6 of the Credit Agreement is hereby amended as follows:

          (i) Clause (h) of  subsection  7.6 is hereby  amended by deleting  the
     word "and" found at the end thereof.

          (ii) Clause (i) of  subsection  7.6 is hereby  amended by changing the
     reference thereof to "(m)."

          (iii)  Subsection  7.6 is hereby  amended and  supplemented  by adding
     thereto four (4) new clauses, to be (i), (j), (k) and (l), reading in their
     entirety as follows:

          "(i) capital  contributions  or other  Investments  to consummate  the
     Tejas Acquisition;


     (j) capital  contributions  or other  Investments  in  connection  with the
proposed acquisition of a 263 mile liquids pipeline from Sorrento,  Louisiana to
Mt.  Belvieu,  Texas,  an ethane  pipeline and an ethane storage well from Shell
Chemical Company or an affiliate thereof;

     (k) capital  contributions or other Investments to an entity to be owned by
the  Company  (or a  Subsidiary  of the  Company)  and  an  affiliate  of  Exxon
Corporation in connection  with a new propylene  concentrator  facility in Baton
Rouge, Louisiana;"

     (l)  capital   contributions   or  other   Investments  to  consummate  the
acquisition of the 50% general partner interest in Mont Belvieu Associates owned
by one or more Affiliates of Kinder Morgan Energy Partners L.P.; and"

          (iv) The last  sentence  of  Subsection  7.6 is hereby  amended in its
     entirety to read as follows:

          "Notwithstanding  the foregoing,  the aggregate  amount of the capital
     contributions  or  other  Investments  made  in  Permitted  Joint  Ventures
     pursuant to paragraphs  (e) and (g) above shall not exceed  $25,000,000  in
     any fiscal year  (excluding  Investments  during fiscal years 1998 and 1999
     with respect to the Wilprise Pipeline,  the Tristates  Pipeline,  the Baton
     Rouge Fractionator and the NGL Product Chiller)."

     (f) Subsection  7.11 is hereby amended and  supplemented  by adding thereto
the following language at the end thereof:

          "and further except for the natural gas processing business."

     (g)  Subsection  7.21(a) of the Credit  Agreement is hereby  amended in its
entirety to read as follows:

          "(a) Tangible Net Worth. Permit its Consolidated Tangible Net Worth as
     of the  last day of any  fiscal  quarter  of the  Company  to be less  than
     $250,000,000."

     (h)  Subsection  7.21(c) of the Credit  Agreement is hereby  amended in its
entirety to read as follows:


          "(c)  Ratio  of  Total  Indebtedness  to  EBITDA.   Permit  the  Total
     Indebtedness/EBITDA  Ratio to  exceed  3.0 to 1.0 as of the last day of any
     fiscal quarter of the Company.

     For purposes of clauses (b) and (c) of this subsection,  EBITDA shall mean,
at the date of determination occurring on September 30, 1999, the product of (A)
EBITDA for the  nine-month  period ending  September 30, 1999  multiplied by (B)
12/9."

     (i) Subsection 7.22 is hereby added to read in its entirety as follows:

          "No Hostile  Tender  Offers.  Make any hostile tender offer within the
     contemplation of Section 14d of the Securities and Exchange Act of 1934, as
     amended, or otherwise."

     2.7 Amendments to Section 11.

     (a) Clause  (ii) of the  proviso  contained  in the first full  sentence of
subsection  11.2 of the Credit  Agreement  is hereby  amended in its entirety to
read as follows:

          "(ii) change the  principal of or decrease the rate of interest on the
     Revolving Credit Loans or any fees hereunder,".

     (b)  Subsection  11.4(c)  of the  Credit  Agreement  is hereby  amended  by
deleting  therefrom  the proviso  contained at the end of the first  sentence in
said subsection 11.4(c).

     (c) Subsection 11.18 is hereby added to read in its entirety as follows:

          "Co-Arrangers,  etc. The  Co-arrangers,  co-agents  and  documentation
     agent,  in  their  capacities  as  such,  shall  not  have  any  duties  or
     responsibilities under or pursuant to this Agreement."


                              SECTION 3. CONDITIONS

     The  enforceability of this First Amendment against the Agent and the Banks
is subject to the satisfaction of the following conditions precedent:

     3.1 Loan  Documents.  The  Agent  shall  have  received  multiple  original
counterparts,  as requested by the Agent, of this First  Amendment  executed and
delivered  by  a  duly  authorized  officer  of  the  Company,  the  Agent,  the
Documentation  Agent,  and  each  Bank  and  otherwise  in  form  and  substance
satisfactory to the Agent.

     3.2 Company  Proceedings  of Loan  Parties.  The Agent shall have  received
multiple  copies,  as requested by the Agent,  of the  resolutions,  in form and
substance  reasonably  satisfactory  to the Agent, of the Board of Directors (or
equivalent  body)  of the  Company,  authorizing  the  execution,  delivery  and
performance  of this  First  Amendment,  each such  copy  being  attached  to an
original  certificate of the Secretary or an Assistant Secretary of the Company,
dated as of the Effective  Date,  certifying (i) that the  resolutions  attached
thereto are true,  correct and complete  copies of  resolutions  duly adopted by
written consent or at a meeting of the Board of Directors (or equivalent  body),
(ii) that such  resolutions  constitute all resolutions  adopted with respect to
the transactions  contemplated hereby, (iii) that such resolutions have not been
amended,  modified, revoked or rescinded as of the Effective Date, (iv) that the
Partnership  Agreement  and the  Management  Agreement  have not been amended or
otherwise  modified  since the effective  date of the Credit  Agreement,  except
pursuant to any amendments  attached  thereto,  and (v) as to the incumbency and
signature of the officers of the Company executing this First Amendment.

     3.3 Representations and Warranties.  Except as affected by the transactions
contemplated  in the  Credit  Agreement  and this First  Amendment,  each of the
representations  and  warranties  made by the Company in or pursuant to the Loan
Documents,  including  the Credit  Agreement,  shall be true and  correct in all
material respects as of the Effective Date, as if made on and as of such date.


     3.4 No Default.  No Default or Event of Default  shall have occurred and be
continuing as of the Effective Date.

     3.5 No Change. No event shall have occurred since March 31, 1999, which, in
the reasonable opinion of the Banks, could have a material adverse effect on the
condition  (financial or  otherwise),  business,  operations or prospects of the
Company.

     3.6 Other Instruments or Documents. The Agent or any Bank or counsel to the
Agent shall receive such other  instruments  or documents as they may reasonably
request.

     3.7  Events.  The  following  events  shall have  occurred  or shall  occur
contemporaneously with the execution of this First Amendment:

     (a) execution of appropriate documentation evidencing the Debt described in
subsection 7.1(i) of the Credit Agreement, as amended hereby;

     (b) execution of the First Amendment to the EPCO Credit Agreement;

     (c)  execution of a  contribution  agreement in  connection  with the Tejas
Acquisition; and

     (d) receipt by the applicable Banks of the amendment fee pertaining to this
First Amendment.

                            SECTION 4. MISCELLANEOUS

     4.1 Adoption,  Ratification and Confirmation of Credit  Agreement.  Each of
the Company,  the Agent and the Banks does hereby adopt,  ratify and confirm the
Credit Agreement, as amended hereby, and acknowledges and agrees that the Credit
Agreement, as amended hereby, is and remains in full force and effect.

     4.2 Successors and Assigns.  This First Amendment shall be binding upon and
inure to the benefit of the parties hereto and their  respective  successors and
assigns permitted pursuant to the Credit Agreement.

     4.3  Counterparts.  This First  Amendment may be executed by one or more of
the  parties  hereto in any  number of  separate  counterparts,  and all of such
counterparts  taken  together  shall be  deemed to  constitute  one and the same
instrument  and shall be enforceable as of the Effective Date upon the execution
of one or more counterparts hereof by the Company,  the Agent, the Documentation
Agent and the Banks.  In this regard,  each of the parties  hereto  acknowledges
that a  counterpart  of this First  Amendment  containing  a set of  counterpart
execution  pages  reflecting  the  execution  of  each  party  hereto  shall  be
sufficient  to reflect the execution of this First  Amendment by each  necessary
party hereto and shall constitute one instrument.

     4.4 Number and Gender. Whenever the context requires, reference herein made
to the single number shall be  understood  to include the plural;  and likewise,
the plural shall be understood to include the singular. Words denoting sex shall
be  construed  to  include  the  masculine,   feminine  and  neuter,  when  such
construction  is  appropriate;  and specific  enumeration  shall not exclude the
general but shall be construed as  cumulative.  Definitions  of terms defined in
the singular or plural shall be equally applicable to the plural or singular, as
the case may be, unless otherwise indicated.


     4.5 Entire Agreement. This First Amendment constitutes the entire agreement
among  the  parties  hereto  with  respect  to the  subject  hereof.  All  prior
understandings,  statements and agreements, whether written or oral, relating to
the subject hereof are superseded by this First Amendment.

     4.6  Invalidity.  In the  event  that  any one or  more  of the  provisions
contained in this First Amendment shall for any reason be held invalid,  illegal
or unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other provision of this First Amendment.

     4.7 Titles of Articles, Sections and Subsections. All titles or headings to
Articles,  Sections,  subsections or other  divisions of this First Amendment or
the exhibits  hereto,  if any, are only for the  convenience  of the parties and
shall not be  construed  to have any effect or meaning with respect to the other
content of such Articles,  Sections,  subsections,  other divisions or exhibits,
such other content being controlling as the agreement among the parties hereto.

     4.8 Governing  Law. This First  Amendment  shall be deemed to be a contract
made  under  and shall be  governed  by and  construed  in  accordance  with the
internal laws of the State of New York.

     This First Amendment,  the Credit Agreement,  as amended hereby, the Notes,
and the other Loan Documents  represent the final agreement  between the parties
and may not be contradicted by evidence of prior, contemporaneous, or subsequent
oral agreements of the parties.

     There are no unwritten or oral agreements between the parties.



                         [Signatures begin on next page]
  

     IN WITNESS WHEREOF,  the parties hereto have caused this First Amendment to
be duly executed and delivered by their proper and duly  authorized  officers as
of the Effective Date.

                               COMPANY:

                               ENTERPRISE PRODUCTS OPERATING L.P.

                               By:  Enterprise Products GP, LLC, General Partner

                               By:  /s/ Gary L. Miller
                                   ---------------------------------------------
                                    Gary L. Miller
                                    Executive Vice President and Chief
                                    Financial Officer


                               BANKS AND AGENTS:

                               THE CHASE MANHATTAN BANK,
                               Individually as a Bank and as Agent

                               By:  /s/ Peter Ling
                                    --------------------------------------------
                               Name:  Peter Ling
                               Title: Vice President


                               THE BANK OF NOVA SCOTIA,
                               Individually as a Bank and as Documentation Agent

                               By:  /s/ F.C.H. Ashby
                                    --------------------------------------------
                               Name:  F.C.H. Ashby
                               Title: Senior Manager Loan Operations


                               ABN AMRO BANK, NV

                               By:  /s/ Kevin P. Costello
                                    --------------------------------------------
                               Name:  Kevin P. Costello
                               Title: Vice President

                               By:  /s/ Gordon D. Chang
                                    --------------------------------------------
                               Name:  Gordon D. Chang
                               Title: Vice President


                               THE FIRST NATIONAL BANK OF CHICAGO

                               By:  /s/ Kenneth J. Fatur
                                    --------------------------------------------
                               Name:  Kenneth J. Fatur
                               Title: Vice President


                               BANK OF TOKYO-MITSUBISHI, LTD., HOUSTON AGENCY

                               By:  /s/ I. Otani
                                    --------------------------------------------
                               Name:  I. Otani
                               Title: Deputy General Manager

                               CIBC INC.

                               By:  /s/ Aleksandra Dymanus
                               Name:  Aleksandra Dymanus
                               Title: Authorized Signatory


                               CREDIT LYONNAIS NEW YORK BRANCH

                               By:  /s/ Jacques Busquet
                               Name:  Jacques Busquet
                               Title: Executive Vice President


                               DEN NORSKE BANK ASA

                               By:  /s/  Byron L. Cooley
                               Name:  Byron L. Cooley
                               Title: Senior Vice President

                               By:  /s/  J. Morten Kreutz
                               Name:  J. Morten Kreutz
                               Title: First Vice President




                               FIRST UNION NATIONAL BANK

                               By:  /s/ Robert R. Wetteroff
                               Name:  Robert R. Wetteroff
                               Title: Senior Vice President



                               GUARANTY FEDERAL BANK, F.S.B.

                               By:  /s/  Jim R. Hamilton
                               Name:  Jim R. Hamilton
                               Title: Vice President



                               ING (U.S.) CAPITAL CORPORATION

                               By:  /s/  Frank Ferrara
                               Name:  Frank Ferrara
                               Title: Senior Associate



                               GENERAL ELECTRIC CAPITAL CORPORATION

                               By:  /s/ William E. Magee
                               Name:  William E. Magee
                               Title: Duly Authorized Signatory



                               MEESPIERSON CAPITAL CORP.

                               By:  /s/ Darrell W. Holley
                               Name:  Darrell W. Holley
                               Title: Senior Vice President



                               SOCIETE GENERALE, SOUTHWEST AGENCY

                               By:  /s/  Bet Hunter
                               Name:  Bet Hunter
                               Title:


                               THE FUJI BANK, LIMITED
                               NEW YORK BRANCH

                               By:  /s/ Raymond Ventura
                               Name:  Raymond Ventura
                               Title: Vice President & Manager