Document:

<PAGE>
                                                                    EXHIBIT 10.1

                     EIGHTH SUPPLEMENT TO PURCHASE AGREEMENT

         THIS EIGHTH SUPPLEMENT TO PURCHASE AGREEMENT dated as of March 5, 2002
(this "Supplement"), is made by:

         o        TransTexas Gas Corporation, a Delaware corporation (herein
                  called "Grantor"),

         o        Mirant Americas Energy Capital, LP, formerly named Southern
                  Producer Services, L.P. ("SPS"),

         o        TCW DR VI Investment Partnership, L.P. ("Fund VI"), acting
                  through its agent, TCW Asset Management Company,

         o        TCW Global Project Fund Ltd. ("GPF"), acting through its
                  agent, TCW London International, Limited (SPS, Fund VI, and
                  GPF are herein collectively called, "Grantee"), and

         o        TCW London International, Limited ("TCW London"), as Agent on
                  behalf of GPF, and TCW Asset Management Company ("Tamco"), as
                  Agent on behalf of Fund VI (TCW London and Tamco are in such
                  capacities herein collectively called "Funds Agent").

                                    RECITALS

         1. Grantor, SPS, TCW Portfolio No. 1555 DR V Sub-Custody Partnership,
L.P. ("Fund V"), Fund VI and Funds Agent have heretofore entered into that
certain Purchase Agreement dated as of March 14, 2000 (herein, as heretofore
amended or supplemented, called the "Original Purchase Agreement"), and, as
contemplated therein, Grantor has, by means of a Production Payment Conveyance
dated as of the same date (herein, as heretofore amended or supplemented, called
the "Original Conveyance"), conveyed to SPS, Fund V and Fund VI the "Production
Payment" as therein defined, burdening interests of Grantor in certain oil and
gas properties.

         2. Effective as of December 1, 2000, Fund V assigned all of its right,
title, and interest under the Original Conveyance to SPS pursuant to that
certain Conveyance of Interest in Production Payment dated as of February 7,
2001.

         3. Effective as of September 10, 2001, SPS assigned to GPF an undivided
interest in the Production Payment pursuant to that certain Partial Conveyance
of Production Payment and Seventh Supplement to Production Payment Conveyance
dated as of September 10, 2001.

         4. As contemplated in the Original Purchase Agreement, Grantor now
desires to supplement and amend the Original Conveyance in consideration of the
payment by SPS of an additional Purchase Price Payment, as more fully described
below.

<PAGE>

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants and agreements contained herein, Grantor, SPS, Fund VI, GPF, and Funds
Agent hereby agree as follows:

                     ARTICLE I - Definitions and References

         Section 1.1. Defined Terms and References. As used herein, the terms
"Original Conveyance", "Original Purchase Agreement", "Grantor", "SPS", "Fund
V", "Fund VI", "GPF", "Grantee", "Tamco", "TCW London", and "Funds Agent" have
the meanings given them above. Reference is also made to the Original Purchase
Agreement and to the Original Conveyance for the meaning of various terms
defined therein, all of which shall when used herein (unless otherwise expressly
defined herein) have the same meanings. For purposes of this Supplement, unless
the context otherwise requires, the following additional terms shall have the
following meanings:

         "Current Closing Date" has the meaning given such term in Section 2.4.

         "Current Conveyance Supplement" means the Eighth Supplement to
Production Payment Conveyance executed by Grantor and Grantee substantially in
the form of Exhibit A hereto.

         "Current Purchase Price Payment" means a Purchase Price Payment in the
amount of $14,000,000.

         "Current Supplement Documents" means this Supplement, the Current
Conveyance Supplement, and all other Production Payment Documents delivered
substantially contemporaneously herewith.

         "Production Payment Conveyance" means the Original Conveyance as
amended and supplemented by the Current Conveyance Supplement.

         "Purchase Agreement" means the Original Purchase Agreement as
supplemented and amended hereby.

         Section 1.2. Rules of Construction. All references in this Supplement
to articles, sections, subsections and other subdivisions refer to corresponding
articles, sections, subsections and other subdivisions of this Supplement unless
expressly provided otherwise. Titles appearing at the beginning of any of such
subdivisions are for convenience only and shall not constitute part of such
subdivisions and shall be disregarded in construing the language contained in
such subdivisions. The words "this Supplement, "this instrument", "herein",
"hereof", "hereby", "hereunder" and words of similar import refer to this
Supplement as a whole and not to any particular subdivision unless expressly so
limited. Unless the context otherwise requires: "including" (and its grammatical
variations) means "including without limitation"; "or" is not exclusive; words
in the singular form shall be construed to include the plural and vice versa;
words in any gender include all other genders; references herein to any
instrument or agreement refer to such instrument or agreement as it may be from
time to time supplemented or amended; and references herein to any Person
include such Person's successors and assigns. All references

                                       2
<PAGE>

in this Supplement to exhibits and schedules refer to the exhibits and schedules
to this Supplement unless expressly provided otherwise, and all such exhibits
and schedules are hereby incorporated herein by reference and made a part hereof
for all purposes.

                             ARTICLE II - Amendments

         Section 2.1. Agreement to Amend Conveyance. Upon the terms and
conditions of this Supplement and the Purchase Agreement, Grantor and Grantee
agree to amend and supplement the Original Conveyance by executing and
delivering the Current Conveyance Supplement.

         Section 2.2. Amendment to Purchase Agreement. The definition of Program
Period in Section 1.1 of the Original Purchase Agreement is hereby amended in
its entirety to read as follows:

                  " 'Program Period' means the period beginning on the Initial
         Closing Date through and including March 7, 2002."

         Section 2.3. Closing. On the Current Closing Date, Grantor shall
deliver the Current Conveyance Supplement to Grantee, and Grantor shall satisfy
all of the conditions set out in Sections 3.4 and 3.5 of the Purchase Agreement
(other than the conditions in Section 3.4(e) and (f) of the Purchase Agreement,
which are hereby waived without prejudice to the rights of SPS and Fund VI to
request and receive the same in connection with any subsequent supplement to the
Purchase Agreement). Within one Business Day after the Current Closing Date, SPS
shall pay all of the Current Purchase Price Payment to Grantor in accordance
with the terms and procedures of the Purchase Agreement.

         Section 2.4. Time and Place of Closing. The closing for the
consummation of the transactions contemplated herein shall take place on March
7, 2002 or on such other date as may be agreed to by Grantor and Grantee (herein
called the "Current Closing Date").

                   ARTICLE III - Representations and Covenants

         Section 3.1. Representations and Warranties of Grantor. To induce
Grantee to enter into the Current Supplement Documents and to pay the Current
Purchase Price Payment, Grantor hereby represents and warrants and covenants to
Grantee that:

         (a) All representations and warranties made by Grantor or any other
TransTexas Company in any Production Payment Document now or previously
delivered are true and correct as of the Current Closing Date (unless such
representations and warranties are expressly limited to an earlier date, in
which case such representations and warranties are true and correct as of such
earlier date), provided that the representations and warranties confirmed in the
Omnibus Certificates heretofore delivered are true and correct as such
Certificates are amended and updated through the date hereof. Without limitation
of the foregoing, no Senior Notes Event of Default exists.

                                       3
<PAGE>

         (b) Each TransTexas Company has performed all agreements, covenants,
and conditions which it is required by any Production Payment Document to
perform on or prior to the Current Closing Date.

         (c) The consummation on the Current Closing Date of the transactions
contemplated in the Current Supplement Documents: (i) is not prohibited by any
law or any regulation or order of any court or governmental agency or authority
applicable to Grantor or any other TransTexas Company, and (ii) does not subject
any of them to any penalty or other onerous condition under or pursuant to any
such law, regulation or order.

         Section 3.2. Covenants. To induce Grantee to enter into the Current
Supplement Documents and to pay the Current Purchase Price Payment, Grantor
hereby covenants with Grantee that Grantor will perform all of its covenants and
duties under the Production Payment Documents, all as fully as if they were set
out in full herein.

         Section 3.3. Representations and Warranties of Grantee. Each Person
included within Grantee hereby represents and warrants to Grantor that: (a) such
Person has incurred no obligation or liability, contingent or otherwise, for
broker's or finder's fees in respect of any of the matters provided for in this
Supplement for which fees Grantor might be liable; (b) the Purchase Agreement
constitutes the legal, valid and binding act and obligation of such Person,
enforceable against such Person in accordance with its terms except as such
enforcement may be limited by bankruptcy, insolvency, moratorium and other
similar laws applicable to creditors' rights generally or by general principles
of equity; (c) no bankruptcy or insolvency proceeding is presently pending (or,
to such Person's best knowledge, threatened) by or against such Person under any
applicable bankruptcy, insolvency or other similar law of any jurisdiction; (d)
such Person has not made a general assignment for the benefit of creditors; and
(e) such Person is acquiring the Production Payment for its own account and not
with any intention to transfer all or any part of the Production Payment to
others in violation of the Securities Act of 1933, as amended, or any other
applicable securities laws. Fund VI further represents and warrants that in
connection with the transactions contemplated herein and in the Purchase
Agreement (i) it is represented by Tamco, an investment manager that qualifies
as a "qualified professional asset manager" as defined in Department of Labor
Prohibited Transaction Exemption 84-14 (the "QPAM Exemption") and (ii) each of
the conditions of the QPAM Exemption are satisfied and will, throughout the term
of the Purchase Agreement (as hereby supplemented and amended), be satisfied.

                                       4
<PAGE>

                           ARTICLE IV - Miscellaneous

         Section 4.1. Ratification of Production Payment Documents. The Original
Purchase Agreement as hereby supplemented and amended is hereby ratified and
confirmed in all respects. The other Production Payments Documents, as they may
be supplemented, amended or affected by the Current Supplement Documents, are
hereby ratified and confirmed in all respects. Any reference to the Purchase
Agreement in any Production Payment Document shall be deemed to refer to this
Supplement also, and any reference in any Production Payment Document to any
other document or instrument amended, renewed, extended or otherwise affected by
any Current Supplement Document shall also refer to such Current Supplement
Document. The execution, delivery and effectiveness of this Supplement and the
other Current Supplement Documents shall not, except as expressly provided
herein or therein, operate as a waiver of any right, power or remedy of Grantee
or Funds Agent under the Purchase Agreement or any other Production Payment
Document nor constitute a waiver of any provision of the Purchase Agreement or
any other Production Payment Document.

         Section 4.2. Survival of Agreements. All representations, warranties,
covenants and agreements of Grantor herein shall survive the execution and
delivery of this Supplement and the other Current Supplement Documents and shall
further survive until terminated in accordance with the Purchase Agreement.

         Section 4.3. Production Payment Documents. This Supplement and the
other Current Supplement Documents are Production Payment Documents, and all
provisions in the Purchase Agreement pertaining to Production Payment Documents
(including the arbitration provisions of Section 6.9 of the Purchase Agreement)
apply hereto and thereto.

         THIS WRITTEN AGREEMENT AND THE OTHER PRODUCTION PAYMENT 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 ORAL AGREEMENTS BETWEEN THE PARTIES.

         Section 4.4. Governing Law. This Supplement shall be deemed a contract
and instrument made under the laws of the State of Texas and shall be construed
and enforced in accordance with and governed by the laws of the State of Texas
and the laws of the United States of America, without regard to principles of
conflicts of law.

         Section 4.5. Counterparts. This Supplement may be separately executed
in counterparts and by the different parties hereto in separate counterparts,
each of which when so executed shall be deemed to constitute one and the same
Supplement.

            [THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK]

                                       5
<PAGE>

         IN WITNESS WHEREOF, this Supplement is executed as of the date first
written above.

                                       TRANSTEXAS GAS CORPORATION

                                       By:
                                            ------------------------------------
                                            Ed Donahue
                                            Vice President

                                       MIRANT AMERICAS ENERGY CAPITAL, LP

                                       BY:  Mirant Americas Development, Inc.,
                                            its general partner

                                            By:
                                               ---------------------------------
                                               John A. Rigas
                                               Attorney-in-Fact

                                       TCW DR VI INVESTMENT PARTNERSHIP, L.P.

                                       By:  TCW ASSET MANAGEMENT COMPANY, as its
                                            Agent

                                            By:
                                               ---------------------------------
                                               Kurt A. Talbot
                                               Senior Vice President

                                       TCW GLOBAL PROJECT FUND LTD.

                                       By:
                                            ------------------------------------
                                            David J. Doyle
                                            Director

                                       TCW ASSET MANAGEMENT COMPANY, as Agent

                                       By:
                                            ------------------------------------
                                            Kurt A. Talbot
                                            Senior Vice President

                                       6
<PAGE>

                                 ACKNOWLEDGMENT

         To induce Grantee to enter into the above Supplement, the undersigned
Galveston Bay Pipeline Company and Galveston Bay Processing Company each hereby
ratify and confirm their various agreements made in connection with the
Production Payment Documents referred to above and acknowledge and agree that
such agreements remain in full force and effect after taking into account the
Current Supplement Documents referred to above.

EXECUTED as of the date of the above supplement.

GALVESTON BAY PIPELINE COMPANY

By:
    ------------------------------
    Ed Donahue
    Vice President

GALVESTON BAY PROCESSING COMPANY

By:
    -----------------------------
    Ed Donahue
    Vice President

                                       7
<PAGE>

                                                                       EXHIBIT A

                         EIGHTH SUPPLEMENT TO PRODUCTION
                               PAYMENT CONVEYANCE<PAGE>

                                                                    EXHIBIT 10.2

                         EIGHTH SUPPLEMENT TO PRODUCTION
                               PAYMENT CONVEYANCE

         THIS EIGHTH SUPPLEMENT TO PRODUCTION PAYMENT CONVEYANCE (this
"Supplement"), dated as March 5, 2002, is made by TransTexas Gas Corporation, a
Delaware corporation ("Grantor"), Mirant Americas Energy Capital, LP, formerly
named Southern Producer Services, L.P. ("SPS"), TCW DR VI Investment
Partnership, L.P. ("Fund VI"), and TCW Global Project Fund Ltd. ("GPF"). SPS,
Fund VI, and GPF are herein collectively called "Grantee".

                                    RECITALS:

A.       Effective as of March 1, 2000, Grantor executed in favor of TCW
         Portfolio No. 1555 DR V Sub-Custody Partnership, L.P. ("Fund V"), Fund
         VI, and SPS that certain Production Payment Conveyance dated as of
         March 14, 2000 (the "3/14/2000 Conveyance"). The 3/14/2000 Conveyance
         has previously been supplemented and amended by various supplements
         and, as so supplemented and amended, is herein called the "Original
         Conveyance". The 3/14/2000 Conveyance and such supplements have been
         recorded as set forth in Schedule 1 hereto (the "Recording Schedule");
         all capitalized terms used but not defined herein shall have the
         meanings assigned to them in the Original Conveyance.

B.       Effective as of December 1, 2000, Fund V assigned all of its right,
         title, and interest under the Original Conveyance to SPS pursuant to a
         Conveyance of Interest in Production Payment dated as of February 7,
         2001.

3.       Effective as of September 10, 2001, SPS conveyed an undivided interest
         in the Production Payment to GPF pursuant to a Partial Conveyance of
         Production Payment and Seventh Supplement to Production Payment
         Conveyance dated as of September 10, 2001. The Production Payment is
         now owned by Fund VI, SPS, and GPF in undivided interests.

D.       Grantee and Grantor desire to supplement and amend the Original
         Conveyance, as set forth herein, to account for the payment by SPS of
         additional funds to Grantor.

E.       As described in Section 8.7 of the Original Conveyance, Fund VI has
         appointed TCW Asset Management Company and GPF has appointed TCW London
         International, Limited to act as their respective agents in connection
         with supplements and amendments to the Original Conveyance.

                                       1
<PAGE>

                           SUPPLEMENTS AND AGREEMENTS:

         FOR A GOOD AND VALUABLE CONSIDERATION, the receipt and sufficiency of
which are hereby acknowledged, Grantor and Grantee do hereby agree, act and
covenant as follows:

         1. Effective as of 9:00 a.m. Houston, Texas time, on March 7, 2002 (the
"Effective Time"), the Original Conveyance is amended in order to add the amount
of Fourteen Million Dollars ($14,000,000) to the unliquidated balance of the
Primary Sum, as such unliquidated balance stood as of the Effective Time after
giving effect to all applications of PP Proceeds made before the Effective Time.
After giving effect to such amendment (and to such application of PP Proceeds),
the unliquidated balance of the Primary Sum as of the Effective Time is
$36,074,886. (Any PP Proceeds received after the Effective Time on March 7, 2002
shall be deemed to have been received on the next following Business Day.)

         2. All of the terms and provisions of the Original Conveyance, as the
same is amended and supplemented hereby, are ratified, adopted, affirmed and
renewed, and remain in full force and effect for the benefit of Grantee, the
Beneficiaries, Funds Agent, and their respective successors and assigns.

         3. The definition of "Percentage Share" in Section 1.1 of the Original
Conveyance is hereby amended in its entirety to read as follows:

                  " 'Percentage Share' means, with respect to each Person
         included in Grantee, the fractional undivided interest which it owns in
         the Production Payment at the time in question. From the initial grant
         of the Production Payment until June 7, 2000, the Percentage Share of
         each Person included in Grantee was as follows:

                  Fund V       42.859594%
                  Fund VI      21.429797%
                  SPS          35.710609%

         From and after June 7, 2000, until September 8, 2000, the Percentage
         Share of each Person included in Grantee was as follows:

                  Fund V       33.048697%
                  Fund VI      16.524349%
                  SPS          50.426954%

         From and after September 8, 2000, until November 7, 2000, the
         Percentage Share of each Person included in Grantee was as follows:

                  Fund V       22.863142%
                  Fund VI      11.431571%
                  SPS          65.705287%

                                       2
<PAGE>

         From and after November 7, 2000, until December 1, 2000, the Percentage
         Share of each Person included in Grantee was as follows:

                  Fund V       19.08294%
                  Fund VI       9.54147%
                  SPS          71.37559%

         From and after December 1, 2000, until February 7, 2001, the Percentage
         Share of each Person included in Grantee was as follows:

                  Fund VI       9.54147%
                  SPS          90.45853%

         From and after February 7, 2001, until July 9, 2001, the Percentage
         Share of each Person included in Grantee was as follows:

                  Fund VI      49.82233%
                  SPS          51.17767%

         From and after July 9, 2001, until September 10, 2001, the Percentage
         Share of each Person included in Grantee was as follows:

                  Fund VI      43.83362%
                  SPS          56.16638%

         From and after September 10, 2001, until March 7, 2002, the Percentage
         Share of each Person included in Grantee was as follows:

                  Fund VI      31.64025%
                  SPS          49.81482%
                  GPF          18.54493%

         As of 9:00 a.m. Houston, Texas time, on March 7, 2002, the Percentage
         Share of each Person included in Grantee is as follows:

                  Fund VI      19.36125%
                  SPS          69.29076%
                  GPF          11.34799%"

The foregoing Percentage Shares of Fund VI, SPS, and GPF, respectively, taking
effect as of March 7, 2002, are in this Amendment called their "amended
Percentage Shares".

         4. In consideration of the additional purchase price payment made by
SPS to Grantor and the foregoing increase in the unliquidated balance of the
Primary Sum:

                                       3
<PAGE>

                  (a) Fund VI and GPF do hereby GRANT, BARGAIN, SELL, CONVEY,
         ASSIGN, TRANSFER, SET OVER and DELIVER unto SPS such additional
         undivided interests in the Production Payment as are necessary in order
         to cause SPS, GPF and Fund VI to own the Production Payment, at and
         after the Effective Time, in undivided interests in proportion to their
         respective amended Percentage Shares, and

                  (b) Fund VI and GPF do further assign unto SPS such undivided
         interests in Fund VI's and GPF's accounts receivable from the sale of
         PP Hydrocarbons - to the extent such accounts receivable exist and are
         unpaid at the Effective Time and arise from the sale of PP Hydrocarbons
         before the Effective Time - as are necessary in order to cause SPS, GPF
         and Fund VI to share in all collections of such accounts receivable
         after the Effective Time in proportion to their respective amended
         Percentage Shares.

         TO HAVE AND TO HOLD the same, upon and subject to the terms of the
Original Conveyance, as amended hereby, unto SPS and its successors and
Permitted Assigns, until the Termination Time.

         5. The Recording Schedule sets out recording information for the
3/14/2000 Conveyance and the various supplements thereto. Similar earlier
recording schedules are attached to all such supplements. To the extent there is
any inconsistency between the Recording Schedule and such earlier recording
schedules, the Recording Schedule shall control and all such earlier recording
schedules are hereby amended and supplemented to conform to the Recording
Schedule.

         6. All of the terms and provisions of the Original Conveyance, as the
same is amended and supplemented hereby, are ratified, adopted, affirmed and
renewed, and remain in full force and effect for the benefit of Grantee, the
Beneficiaries, Funds Agent, and their respective successors and assigns.

         7. This Supplement may be executed in multiple counterparts, all of
which are identical.

         8. This Supplement shall be binding upon and shall inure to the benefit
of the parties hereto, and their respective successors and assigns, and all of
the covenants and agreements contained in the Original Conveyance, as amended
hereby, shall be deemed to be covenants and agreements running with the lands
affected thereby.

         9. This Supplement shall be governed by and construed in accordance
with the laws of the State of Texas, without regard to principles of conflicts
of laws.

                                       4
<PAGE>

         IN WITNESS WHEREOF, this Supplement is executed by the parties hereto
on the dates set out below in their respective acknowledgments, dated for
purposes of reference as of March 5, 2002, and effective as of the Effective
Time.

                                   TRANSTEXAS GAS CORPORATION

                                   By:
                                       -----------------------------------------
                                       Ed Donahue
                                       Vice President

Grantor's address:                 1300 North Sam Houston Parkway East
                                   Suite 310
                                   Houston, Texas 77032-2949
                                   Attention: Ed Donahue, Vice President
                                   Telephone: 281/987-8600
                                   Telecopy:  281/986-8865

                                   MIRANT AMERICAS ENERGY CAPITAL, LP

                                   By: Mirant Americas Development, Inc.,
                                       its general partner

                                       By:
                                           -----------------------------------
                                           John A. Rigas
                                           Attorney-in-Fact

SPS's address:                     1200 Smith Street
                                   Suite 2890
                                   Houston, Texas 77002
                                   Attention: David W. Stewart
                                   Telephone: 713/276-1902
                                   Telecopy:  713/276-1990

                                       5
<PAGE>

                                       TCW DR VI INVESTMENT PARTNERSHIP, L.P.

                                       By:  TCW ASSET MANAGEMENT COMPANY, as
                                            Agent

                                            By:
                                                 -------------------------------
                                                 Kurt A. Talbot
                                                 Senior Vice President

Fund VI's address:                     c/o Trust Company of the West
                                       865 South Figueroa
                                       Los Angeles, California 90017
                                       Attention: Thomas F. Mehlberg
                                       Telephone: 213/244-0702
                                       Telecopy:  213/244-0604

                                       TCW GLOBAL PROJECT FUND LTD.

                                       By:
                                            ------------------------------------
                                            David J. Doyle
                                            Director

GPF's address:                         TCW Global Project Fund Ltd.
                                       c/o Conyers, Dill & Pearman
                                       Clarendon House
                                       Church Street
                                       Hamilton, Bermuda
                                       Attention: Kevin Butler
                                       Telephone: 441/299-4993
                                       Telecopy: 441/292-4720

                  with a copy to:      TCW London International, Limited
                                       865 South Figueroa
                                       Los Angeles, California 90017
                                       Attention: Arthur Carlson
                                       Telephone: 213/244-0053
                                       Telecopy:  213/244-0604

                                       6
<PAGE>

This document prepared by:

John W. Rain
Thompson & Knight L.L.P.
1700 Pacific Avenue, Suite 3300
Dallas, Texas 75201

                                       7
<PAGE>

STATE OF TEXAS           )
                         )
COUNTY OF HARRIS         )

        The foregoing instrument was acknowledged before me on this 6th day of
March, 2002, by Ed Donahue, the Vice President of TransTexas Gas Corporation, a
Delaware corporation, on behalf of such corporation.

                                               ---------------------------------
    [SEAL]                                     Notary Public, State of Texas

STATE OF TEXAS           )
                         )
COUNTY OF HARRIS         )

         The foregoing instrument was acknowledged before me on this 6th day of
March, 2002, by John A. Rigas, the Attorney-in-Fact of Mirant Americas
Development, Inc., a Georgia corporation, on behalf of such corporation acting
as general partner of Mirant Americas Energy Capital, LP, a Delaware limited
partnership, and on behalf of such limited partnership.

                                               ---------------------------------
    [SEAL]                                     Notary Public, State of Texas

STATE OF TEXAS           )
                         )
COUNTY OF HARRIS         )

         The foregoing instrument was acknowledged before me on this 6th day of
March, 2002, by Kurt A. Talbot, the Senior Vice President of TCW Asset
Management Company, a California corporation, on behalf of such corporation
acting as agent as aforesaid.

                                                --------------------------------
    [SEAL]                                      Notary Public, State of Texas

                                       8
<PAGE>

CITY OF HAMILTON         )
                         )
ISLANDS OF BERMUDA       )

         The foregoing instrument was acknowledged before me on this 5th day of
March, 2002, by David J. Doyle, a Director of TCW Global Project Fund Ltd., a
Bermuda company, on behalf of such company.

                                               ---------------------------------
         [SEAL]                                Notary Public, Islands of Bermuda

                                       9
<PAGE>

                                                                      SCHEDULE 1

                               RECORDING SCHEDULE

                                 TCW/TransTexas
                                  (83611.09854)

1.       Production Payment Conveyance among TCW Portfolio No. 1555 DR V
         Sub-Custody Partnership, L.P., TCW DR VI Investment Partnership, L.P.,
         Southern Producer Services, L.P. and TransTexas Gas Corporation.

<Table>
<Caption>

         Recording Jurisdiction                                        Recording Data
         ----------------------                                   ------------------------
<S>                                                               <C>
         Calhoun County, TX                                       Volume 262, Page 33
                                                                  Filed 9/19/00

         Chambers County, TX                                      Document No. 00-448-604,
                                                                  Filed 3/17/2000

         Galveston County, TX                                     Film Code #014-39-0178,
                                                                  Filed 3/17/2000

         Jim Hogg County, TX                                      Volume 17, Page 362,
                                                                  Filed 3/20/2000

         Live Oak County, TX                                      Volume 449, Page 135,
                                                                  Filed 3/20/2000

         Wharton County, TX                                       Volume 360, Page 596,
                                                                  Filed 3/17/2000

         Zapata County, TX                                        Volume 629, Page 471,
                                                                  Filed 3/17/2000

         General Land Office of Texas                             Filed
</Table>

<PAGE>

2.       First Supplement to Production Payment Conveyance among TransTexas Gas
         Corporation, Southern Producer Services, L.P., TCW Portfolio No. 1555
         DR V Sub-Custody Partnership, L.P. and TCW DR VI Investment
         Partnership, L.P.

<Table>
<Caption>

         Recording Jurisdiction                                   Recording Data
         ----------------------                                   --------------
<S>                                                               <C>
         Calhoun County, TX                                       Volume 262, Page 114
                                                                  Filed 9/19/00

         Chambers County, TX                                      Document No. 00-459-630
                                                                  Filed 6/9/2000

         Galveston County, TX                                     Film Code 014-62-1617
                                                                  Filed 6/9/2000

         Jim Hogg County, TX                                      Volume 19, Page 526,
                                                                  Filed 6/9/2000

         Live Oak County, TX                                      Volume 450, Page 428,
                                                                  Filed 6/12/2000

         Wharton County, TX                                       Volume 371, Page 458,
                                                                  Filed 6/9/2000

         Zapata County, TX                                        Volume 634, Page 110,
                                                                  Filed 6/9/2000

         General Land Office of Texas                             Filed
</Table>

3.       Second Supplement to Production Payment Conveyance among TransTexas Gas
         Corporation, Southern Producer Services, L.P., TCW Portfolio No. 1555
         DR V Sub-Custody Partnership, L.P. and TCW DR VI Investment
         Partnership, L.P.

<Table>
<Caption>

         Recording Jurisdiction                                   Recording Data
         ----------------------                                   --------------
<S>                                                               <C>

         Calhoun County, TX                                       Volume 262, Page 132
                                                                  Filed 9/19/00

         Chambers County, TX                                      Document No. 00-470-562
                                                                  Filed 9/18/00

         Galveston County, TX                                     Film Code 014-90-1272
                                                                  Filed 9/15/00

         Jim Hogg County, TX                                      Volume 21, Page 370
                                                                  Filed 9/22/00

         Live Oak County, TX                                      Volume 387, Page 279
                                                                  Filed 9/19/00

         Wharton County, TX                                       Volume 383, Page 740,
                                                                  Filed 9/19/00

         Zapata County, TX                                        Volume 638, Page 642,
                                                                  Filed 9/22/00

         General Land Office of Texas                             Filed
</Table>

                                       2
<PAGE>

4.       Third Supplement to Production Payment Conveyance among TransTexas Gas
         Corporation, Southern Producer Services, L.P., TCW Portfolio No. 1555
         DR V Sub-Custody Partnership, L.P. and TCW DR VI Investment
         Partnership, L.P.

<Table>
<Caption>

         Recording Jurisdiction                                   Recording Data
         ----------------------                                   --------------
<S>                                                               <C>

         Calhoun County, TX                                       Volume 266, Page 205,
                                                                  Filed 11/13/00

         Chambers County, TX                                      Document No. 00-477-116,
                                                                  Filed 11/14/00

         Galveston County, TX                                     Film Code 015-08-1029
                                                                  Filed 11/13/00

         Jim Hogg County, TX                                      Volume 22, Page 256,
                                                                  Filed 11/13/00

         Live Oak County, TX                                      Volume 454, Page 239,
                                                                  Filed 11/14/00

         Wharton County, TX                                       Volume 390, Page 480,
                                                                  Filed 11/13/00

         Zapata County, TX                                        Volume 641, Page 169,
                                                                  Filed 11/13/00

         General Land Office of Texas                             Filed
</Table>

                                       3
<PAGE>

5.       Fourth Supplement to Production Payment Conveyance among TransTexas Gas
         Corporation, Southern Producer Services, L.P., TCW Portfolio No. 1555
         DR V Sub-Custody Partnership, L.P. and TCW DR VI Investment
         Partnership, L.P.

<Table>
<Caption>

         Recording Jurisdiction                                   Recording Data
         ----------------------                                   --------------
<S>                                                               <C>

         Calhoun County, TX                                       Volume 272, Page 114,
                                                                  Filed 2/12/01

         Chambers County, TX                                      Document No. 01-486-620
                                                                  Filed 2/12/01

         Galveston County, TX                                     Film Code 015-31-0563
                                                                  Filed 2/12/01

         Jim Hogg County, TX                                      Volume 23, Page 769,
                                                                  Filed 2/12/01

         Live Oak County, TX                                      Volume 456, Page 400,
                                                                  Filed 2/12/01

         Wharton County, TX                                       Volume 400, Page 418,
                                                                  Filed 2/12/01

         Zapata County, TX                                        Volume 645, Page 328,
                                                                  Filed 2/12/01

         General Land Office of Texas                             Filed
</Table>

6.       Fifth Supplement to Production Payment Conveyance among TransTexas Gas
         Corporation, Southern Producer Services, L.P., TCW Portfolio No. 1555
         DR V Sub-Custody Partnership, L.P. and TCW DR VI Investment
         Partnership, L.P.

<Table>
<Caption>

         Recording Jurisdiction                                   Recording Data
         ----------------------                                   --------------
<S>                                                               <C>

         Calhoun County, TX                                       Volume 282, Page 226,
                                                                  Filed 7/18/01

         Chambers County, TX                                      Document No. 01-507-508
                                                                  Filed 7/18/01

         Galveston County, TX                                     Film Code 015-83-1832
                                                                  Filed 7/17/01

         Jim Hogg County, TX                                      Volume 26, Page 417,
                                                                  Filed 7/18/01

         Live Oak County, TX                                      Volume 461, Page 1,
                                                                  Filed 7/23/01

         Wharton County, TX                                       Volume 419, Page 909,
                                                                  Filed 7/17/01

         Zapata County, TX                                        Volume 652, Page 504,
                                                                  Filed 7/20/01

         General Land Office of Texas                             Filed
</Table>

                                       4
<PAGE>

7.       Sixth Supplement to Production Payment Conveyance.

<Table>
<Caption>

         Recording Jurisdiction                      Recording Data
         ----------------------                      --------------
<S>                                                  <C>

         Calhoun County, TX                          Volume 287, Page 102,
                                                     Filed 9/19/01

         Chambers County, TX                         Document No. 01-517-188
                                                     Filed 9/21/01

         Galveston County, TX                        Film Code 016-06-0472
                                                     Filed 9/18/01

         Jim Hogg County, TX                         Volume 27, Page 668,
                                                     Filed 9/19/01

         Live Oak County, TX                         Volume 462, Page 251,
                                                     Filed 9/19/01

         Wharton County, TX                          Volume 427, Page 346,
                                                     Filed 9/18/01

         Zapata County, TX                           Volume 655, Page 437,
                                                     Filed 9/18/01

         General Land Office of Texas                Filed
</Table>

                                       5
<PAGE>

8.       Partial Conveyance of Production Payment and Seventh Supplement to
         Production Payment Conveyance

<Table>
<Caption>

         Recording Jurisdiction                                   Recording Data
         ----------------------                                   --------------
<S>                                                               <C>

         Calhoun County, TX                                       Volume 287, Page 114,
                                                                  Filed 9/19/01

         Chambers County, TX                                      Document No. 01-517-199
                                                                  Filed 9/21/01

         Galveston County, TX                                     Film Code 016-06-0483
                                                                  Filed 9/18/01

         Jim Hogg County, TX                                      Volume 27, Page 679,
                                                                  Filed 9/19/01

         Live Oak County, TX                                      Volume 462, Page 263,
                                                                  Filed 9/19/01

         Wharton County, TX                                       Volume 427, Page 358,
                                                                  Filed 9/18/01

         Zapata County, TX                                        Volume 655, Page 448,
                                                                  Filed 9/18/01

         General Land Office of Texas                             Filed
</Table>

                                       6
<PAGE>

9.       Partial Reconveyance of Production Payment and Amendment to Production
         Payment Conveyance dated as of October 1, 2001.

<Table>
<Caption>

         Recording Jurisdiction                                   Recording Data
         ----------------------                                   --------------
<S>                                                               <C>

         Calhoun County, TX                                       Volume 289, Page 350,
                                                                  Filed 10/19/01

         Chambers County, TX                                      Document No. 01-520-788
                                                                  Filed 10/19/01

         Galveston County, TX                                     Film Code 016-16-1828
                                                                  Filed 10/18/01

         Jim Hogg County, TX                                      Volume 28, Page 613,
                                                                  Filed 10/19/01

         Live Oak County, TX                                      Volume 464, Page 74,
                                                                  Filed 10/19/01

         Wharton County, TX                                       Volume 430, Page 902,
                                                                  Filed 10/18/01

         Zapata County, TX                                        Volume ____, Page ____,
                                                                  Filed _______

         General Land Office of Texas                             Filed
</Table>

                                       7

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00040-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00040-of-00352.parquet"}]]