LEVIATHAN GAS PIPELINE PARTNERS L P
SC 13D, 1999-06-11
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                  SCHEDULE 13D
                                 (RULE 13d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
                     TO RULE 13D-1(a) AND AMENDMENTS THERETO
                        FILED PURSUANT TO RULE 13(d)-2(a)
                                (AMENDMENT NO. 2)

                      LEVIATHAN GAS PIPELINE PARTNERS, L.P.
                                (NAME OF ISSUER)

                                  COMMON UNITS
                         (TITLE OF CLASS OF SECURITIES)

                                    527367205
                                 (CUSIP NUMBER)

                               J. VINCENT KENDRICK
                    AKIN, GUMP, STRAUSS, HAUER & FELD, L.L.P.
                        1900 PENNZOIL PLACE--SOUTH TOWER
                              711 LOUISIANA STREET
                              HOUSTON, TEXAS 77002
                                 (713) 220-5800
                  (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON
                AUTHORIZED TO RECEIVE NOTICES AND COMMUNICATIONS)


                                  JUNE 1, 1999
                      (DATE OF EVENT WHICH REQUIRES FILING
                               OF THIS STATEMENT)

         IF THE FILING PERSON HAS PREVIOUSLY FILED A STATEMENT ON SCHEDULE 13G
TO REPORT THE ACQUISITION THAT IS THE SUBJECT OF THIS SCHEDULE 13D, AND IS
FILING THIS SCHEDULE BECAUSE OF RULE 13D-1(e), 13d-1(f) OR 13d-1(g), CHECK THE
FOLLOWING BOX [ ].





                       (Continued on the following pages)



<PAGE>   2


<TABLE>
<S>       <C>                                 <C>                         <C>
- --------------------------------------------- --------------------------- -------------------------------------------
CUSIP NO.  527367205                                    13D                                       PAGE 2 OF 25 PAGES
          -------------
- --------- -----------------------------------------------------------------------------------------------------------

1         NAMES OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          El Paso Energy Corporation
- --------- -----------------------------------------------------------------------------------------------------------

2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                                    (a)[ ]
                                                                                              (b)[ ]
- --------- -----------------------------------------------------------------------------------------------------------

3         SEC USE ONLY


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

4         SOURCE OF FUNDS


          OO
- --------- -----------------------------------------------------------------------------------------------------------

5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ]
- --------- -----------------------------------------------------------------------------------------------------------

6         CITIZENSHIP OR PLACE OF ORGANIZATION


          Delaware
- --------------------------------- ---------------------- ------------------------------------------------------------
  NUMBERS OF                      7                      SOLE VOTING POWER  8,953,764
    SHARES

                                  ---------------------- ------------------------------------------------------------
 BENEFICIALLY                     8                      SHARED VOTING POWER  0
   OWNED BY

                                  ---------------------- ------------------------------------------------------------
     EACH                         9                      SOLE DISPOSITIVE POWER 8,953,764
  REPORTING

                                  ---------------------- ------------------------------------------------------------
 PERSON WITH                      10                     SHARED DISPOSITIVE POWER  0


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

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


          8,953,764 Common Units
- --------- -----------------------------------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                  [ ]


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

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          34.4%
- --------- -----------------------------------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON


          HC
- --------- -----------------------------------------------------------------------------------------------------------
</TABLE>



<PAGE>   3

<TABLE>
<S>      <C>                                  <C>                         <C>
- --------------------------------------------- --------------------------- -------------------------------------------
CUSIP NO.  527367205                                    13D                                       PAGE 3 OF 25 PAGES
          ------------
- --------- -----------------------------------------------------------------------------------------------------------

1         NAMES OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          El Paso Field Services Company
- --------- -----------------------------------------------------------------------------------------------------------

2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                                                 (a)[ ]
                                                                                                           (b)[ ]
- --------- -----------------------------------------------------------------------------------------------------------

3         SEC USE ONLY


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

4         SOURCE OF FUNDS


          OO
- --------- -----------------------------------------------------------------------------------------------------------

5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)              [ ]
- --------- -----------------------------------------------------------------------------------------------------------

6         CITIZENSHIP OR PLACE OF ORGANIZATION


          Delaware
- --------------------------------- ---------------------- ------------------------------------------------------------
  NUMBERS OF                      7                      SOLE VOTING POWER   8,953,764
    SHARES

                                  ---------------------- ------------------------------------------------------------
 BENEFICIALLY                     8                      SHARED VOTING POWER   0
   OWNED BY

                                  ---------------------- ------------------------------------------------------------
EACH REPORTING                    9                      SOLE DISPOSITIVE POWER   8,953,764


                                  ---------------------- ------------------------------------------------------------
 PERSON WITH                      10                     SHARED DISPOSITIVE POWER   0


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

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


          8,953,764 Common Units
- --------- -----------------------------------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                               [ ]


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

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


          34.4%
- --------- -----------------------------------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON


          CO
- --------- -----------------------------------------------------------------------------------------------------------
</TABLE>




<PAGE>   4

<TABLE>
<S>        <C>                                <C>                         <C>
- --------------------------------------------- --------------------------- -------------------------------------------
CUSIP NO.  527367205                                    13D                                       PAGE 4 OF 25 PAGES
          -------------
- --------- -----------------------------------------------------------------------------------------------------------

1         NAMES OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          El Paso Tennessee Pipeline Co.
- --------- -----------------------------------------------------------------------------------------------------------

2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                                                 (a)[ ]
                                                                                                           (b)[ ]
- --------- -----------------------------------------------------------------------------------------------------------

3         SEC USE ONLY


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

4         SOURCE OF FUNDS


          OO
- --------- -----------------------------------------------------------------------------------------------------------

5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)              [ ]
- --------- -----------------------------------------------------------------------------------------------------------

6         CITIZENSHIP OR PLACE OF ORGANIZATION


          Delaware
- --------------------------------- ---------------------- ------------------------------------------------------------
  NUMBERS OF                      7                      SOLE VOTING POWER   8,953,764
    SHARES

                                  ---------------------- ------------------------------------------------------------
 BENEFICIALLY                     8                      SHARED VOTING POWER   0
   OWNED BY

                                  ---------------------- ------------------------------------------------------------
EACH REPORTING                    9                      SOLE DISPOSITIVE POWER   8,953,764


                                  ---------------------- ------------------------------------------------------------
 PERSON WITH                      10                     SHARED DISPOSITIVE POWER   0


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

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


          8,953,764 Common Units
- --------- -----------------------------------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                               [ ]


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

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


          34.4%
- --------- -----------------------------------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON


          CO
- --------- -----------------------------------------------------------------------------------------------------------
</TABLE>




<PAGE>   5


<TABLE>
<S>       <C>                                 <C>                         <C>
- --------------------------------------------- --------------------------- -------------------------------------------
CUSIP NO.  527367205                                     13D                                      PAGE 5 OF 25 PAGES
          -------------
- --------- -----------------------------------------------------------------------------------------------------------

1         NAMES OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          EPEC Deepwater Gathering Company
- --------- -----------------------------------------------------------------------------------------------------------

2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A                                                     (a)[ ]
                                                                                                         (b)[ ]
- --------- -----------------------------------------------------------------------------------------------------------

3         SEC USE ONLY


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

4         SOURCE OF FUNDS


          OO
- --------- -----------------------------------------------------------------------------------------------------------

5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)              [ ]
- --------- -----------------------------------------------------------------------------------------------------------

6         CITIZENSHIP OR PLACE OF ORGANIZATION


          Delaware
- --------------------------------- ---------------------- ------------------------------------------------------------
  NUMBERS OF                      7                      SOLE VOTING POWER  8,953,764
    SHARES

                                  ---------------------- ------------------------------------------------------------
 BENEFICIALLY                     8                      SHARED VOTING POWER  0
   OWNED BY

                                  ---------------------- ------------------------------------------------------------
     EACH                         9                      SOLE DISPOSITIVE POWER  8,953,764
  REPORTING

                                  ---------------------- ------------------------------------------------------------
 PERSON WITH                      10                     SHARED DISPOSITIVE POWER  0


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

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


          8,953,764 Common Units
- --------- -----------------------------------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                               [ ]


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

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


          34.4%
- --------- -----------------------------------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON


          CO
- --------- -----------------------------------------------------------------------------------------------------------
</TABLE>



<PAGE>   6

<TABLE>
<S>       <C>                                 <C>                         <C>
- --------------------------------------------- --------------------------- -------------------------------------------
CUSIP NO.  527367205                                     13D                                      PAGE 6 OF 25 PAGES
          --------------
- --------- -----------------------------------------------------------------------------------------------------------

1         NAMES OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Leviathan Gas Pipeline Company
- --------- -----------------------------------------------------------------------------------------------------------

2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                                                 (a)[ ]
                                                                                                           (b)[ ]
- --------- -----------------------------------------------------------------------------------------------------------

3         SEC USE ONLY


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

4         SOURCE OF FUNDS


          OO
- --------- -----------------------------------------------------------------------------------------------------------

5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)              [ ]
- --------- -----------------------------------------------------------------------------------------------------------

6         CITIZENSHIP OR PLACE OF ORGANIZATION


          Delaware
- --------------------------------- ---------------------- ------------------------------------------------------------
  NUMBERS OF                      7                      SOLE VOTING POWER   8,953,764
    SHARES

                                  ---------------------- ------------------------------------------------------------
 BENEFICIALLY                     8                      SHARED VOTING POWER   0
   OWNED BY

                                  ---------------------- ------------------------------------------------------------
EACH REPORTING                    9                      SOLE DISPOSITIVE POWER   8,953,764


                                  ---------------------- ------------------------------------------------------------
 PERSON WITH                      10                     SHARED DISPOSITIVE POWER   0


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

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


          8,953,764 Common Units
- --------- -----------------------------------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                               [ ]


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

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


          34.4%
- --------- -----------------------------------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON


          CO
- --------- -----------------------------------------------------------------------------------------------------------
</TABLE>



<PAGE>   7

<TABLE>
<S>       <C>                                 <C>                         <C>
- --------------------------------------------- --------------------------- -------------------------------------------
                                                         13D
CUSIP NO.  527367205                                                                              PAGE 7 OF 25 PAGES
          -------------
- --------- -----------------------------------------------------------------------------------------------------------

1         NAMES OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Leviathan Holdings Company
- --------- -----------------------------------------------------------------------------------------------------------

2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                                                 (a)[ ]
                                                                                                           (b)[ ]
- --------- -----------------------------------------------------------------------------------------------------------

3         SEC USE ONLY


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

4         SOURCE OF FUNDS


          OO
- --------- -----------------------------------------------------------------------------------------------------------

5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)              [ ]
- --------- -----------------------------------------------------------------------------------------------------------

6         CITIZENSHIP OR PLACE OF ORGANIZATION


          Delaware
- --------------------------------- ---------------------- ------------------------------------------------------------
  NUMBERS OF                      7                      SOLE VOTING POWER   8,953,764
    SHARES

                                  ---------------------- ------------------------------------------------------------
 BENEFICIALLY                     8                      SHARED VOTING POWER   0
   OWNED BY

                                  ---------------------- ------------------------------------------------------------
EACH REPORTING                    9                      SOLE DISPOSITIVE POWER   8,953,764


                                  ---------------------- ------------------------------------------------------------
 PERSON WITH                      10                     SHARED DISPOSITIVE POWER   0


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

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


          8,953,764 Common Units
- --------- -----------------------------------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                               [ ]


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

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


          34.4%
- --------- -----------------------------------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON


          CO
- --------- -----------------------------------------------------------------------------------------------------------
</TABLE>



<PAGE>   8


<TABLE>
<S>       <C>                                 <C>                         <C>
- --------------------------------------------- --------------------------- -------------------------------------------
                                                         13D
CUSIP NO.  527367205                                                                              PAGE 8 OF 25 PAGES
          --------------
- --------- -----------------------------------------------------------------------------------------------------------

1         NAMES OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          DeepTech International Inc.
- --------- -----------------------------------------------------------------------------------------------------------

2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                                                 (a)[ ]
                                                                                                           (b)[ ]
- --------- -----------------------------------------------------------------------------------------------------------

3         SEC USE ONLY


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

4         SOURCE OF FUNDS


          OO
- --------- -----------------------------------------------------------------------------------------------------------

5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)              [ ]
- --------- -----------------------------------------------------------------------------------------------------------

6         CITIZENSHIP OR PLACE OF ORGANIZATION


          Delaware
- --------------------------------- ---------------------- ------------------------------------------------------------
  NUMBERS OF                      7                      SOLE VOTING POWER   8,953,764
    SHARES
                                  ---------------------- ------------------------------------------------------------
 BENEFICIALLY                     8                      SHARED VOTING POWER   0
   OWNED BY
                                  ---------------------- ------------------------------------------------------------
EACH REPORTING                    9                      SOLE DISPOSITIVE POWER   8,953,764
                                  ---------------------- ------------------------------------------------------------
 PERSON WITH                      10                     SHARED DISPOSITIVE POWER   0

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

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


          8,953,764 Common Units
- --------- -----------------------------------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                               [ ]


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

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


          34.4%
- --------- -----------------------------------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON


          CO
- --------- -----------------------------------------------------------------------------------------------------------
</TABLE>


<PAGE>   9



ITEM 1.  SECURITY AND ISSUER.

         This Amendment No. 2 (the "Amendment") amends the statement on Schedule
13D previously filed by Leviathan Gas Pipeline Company, a Delaware corporation
("LGPC"), relating to the Common Units (the "Common Units") representing limited
partner interests in Leviathan Gas Pipeline Partners, L.P., a Delaware limited
partnership (the "Issuer"). This address of the principal executive offices of
the Issuer is El Paso Energy Building, 1001 Louisiana Street, Houston, TX 77002.

ITEM 2.  IDENTITY AND BACKGROUND.

         This Amendment is being filed by LGPC, Leviathan Holdings Company, a
Delaware corporation ("Holdings"), DeepTech International Inc., a Delaware
corporation ("DeepTech"), El Paso Energy Corporation, a Delaware corporation
("El Paso Energy"), El Paso Tennessee Pipeline Co., a Delaware corporation
("El Paso Tennessee"), El Paso Field Services Company, a Delaware corporation
("El Paso Field Services"), and EPEC Deepwater Gathering Company, a Delaware
corporation ("EPEC Deepwater"; each of LGPC, Holdings, DeepTech, El Paso Energy,
El Paso Tennessee, El Paso Field Services and EPEC Deepwater is referred to
herein as a "Reporting Person").

         LGPC is wholly owned by Holdings. LGPC's principal business is to serve
as the general partner of the Issuer.

         Holdings is wholly owned by DeepTech. Holdings' principal business is
to serve as the holding company of LGPC.

         DeepTech is wholly owned by El Paso Energy. DeepTech's principal
business is to serve as the holding company of Holdings.

         EPEC Deepwater is wholly owned by El Paso Field Services. EPEC
Deepwater's only material assets are Common Units and a 1% interest in Viosca
Knoll Gathering Company, a Delaware general partnership ("Viosca Knoll").

         El Paso Field Services is wholly owned by El Paso Tennessee. El Paso
Field Services's principal business is to own, operate, acquire and construct
natural gas gathering, processing and other related facilities.

         El Paso Tennessee is wholly owned by El Paso Energy. El Paso
Tennessee's principal business is to serve as a holding company.

         El Paso Energy is a diversified energy company with principal
operations consisting of the interstate and intrastate transportation, gathering
and processing of natural gas, the marketing of natural gas and other
commodities, and the development and operations of energy infrastructure
facilities worldwide.




                                       9
<PAGE>   10

         The principal business and office address of LGPC, Holdings, DeepTech,
EPEC Deepwater, El Paso Tennessee, El Paso Field Services and El Paso Energy is
El Paso Energy Building, 1001 Louisiana Street, Houston, Texas 77002.

         Attached as Schedule 1 hereto and incorporated herein by reference is a
list of all directors and executive officers of each Reporting Person.

         (d), (e) During the last five years, no Reporting Person nor, to the
best of their knowledge, any entity or person with respect to whom information
is provided in response to this Item has, during the last five years, been (i)
convicted in a criminal proceeding (excluding traffic violations and similar
misdemeanors) or (ii) a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such proceeding
was or is subject to a judgment, decree or final order enjoining future
violations of, or prohibiting or mandating activities subject to, Federal or
state securities laws or finding any violation with respect to such law.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

         On August 14, 1998, DeepTech merged with a subsidiary of El Paso
Energy. In connection with that transaction, El Paso Energy acquired the
minority interests in Holdings. Consequently, El Paso Energy beneficially owns
the Common Units held by LGPC.

         LGPC acquired the Common Units owned by it as part of the formation and
capitalization of the Issuer. Since LGPC is the sole general partner of the
Issuer, LGPC (and accordingly the other Reporting Persons) may be deemed to
control the Issuer. LGPC entered into a Management Agreement with DeepTech
pursuant to which DeepTech provides certain management services to LGPC,
including management services rendered by LGPC in its capacity as the general
partner of the Issuer.

         On June 1, 1999, El Paso Field Services, EPEC Deepwater, the Issuer and
VK-Deepwater, L.L.C., a Delaware limited liability company ("VK Deepwater") and
wholly owned subsidiary of the Issuer, consummated certain transactions
described in the issuer's Proxy Statement dated February 8, 1999 pursuant to a
Contribution Agreement (the "Contribution Agreement") dated January 21, 1999. In
connection with those transactions, EPEC Deepwater acquired 2,661,870 Common
Units. Consequently, El Paso Energy beneficially owns the Common Units held by
EPEC Deepwater.

         EPEC Deepwater acquired the Common Units owned by it as consideration
for (i) transferring to VK Deepwater a 49% interest in Viosca Knoll, (ii)
granting to the Issuer an option to purchase its remaining 1% interest in Viosca
Knoll and (iii) contributing $33,350,000 to Viosca Knoll (which amount equaled
half of the then outstanding balance under Viosca Knoll's revolving credit
facility. EPEC Deepwater received the Common Units described above and
$19,930,750 in cash from the Issuer.





                                       10
<PAGE>   11

ITEM 4.  PURPOSE OF TRANSACTION.

         Except as stated above, no Reporting Person has any plans or proposals
of the type referred to in clauses (a) through (j) of Item 4 of Schedule 13D,
although they reserve the right to formulate such plans or proposals in the
future.

ITEM 5.  INTEREST IN SECURITIES OF ISSUER.

         (a) The following table describes the number of Common Units, including
Common Units issuable upon exercise or conversion of derivative securities and
the percent of outstanding Common Units owned by each person identified in Item
2. All percentages are based on (i) the 23,349,988 Common Units issued and
outstanding on May 10, 1999, as represented by the Quarterly Report on Form 10-Q
filed by the Issuer for the period ended March 31, 1999, plus (ii) the 2,661,870
Common Units issued on June 1, 1999 to EPEC Deepwater.

<TABLE>
<CAPTION>
                                                                                                Total
                                                               Derivative                       -----
Holder                               Common Units              Securities              Number             %(1)
- ------                               ------------              ----------              ------             ----
<S>                                  <C>                       <C>                   <C>                 <C>
LGPC                                   8,953,764                   -                  8,953,764           34.4%
Holdings                               8,953,764                   -                  8,953,764           34.4%
DeepTech                               8,953,764                   -                  8,953,764           34.4%
EPEC Deepwater                         8,953,764                   -                  8,953,764           34.4%
El Paso Energy                         8,953,764                   -                  8,953,764           34.4%
El Paso Tennessee                      8,953,764                   -                  8,953,764           34.4%
El Paso Field Services                 8,953,764                   -                  8,953,764           34.4%
EPEC Deepwater                         8,953,764                   -                  8,953,764           34.4%
William A. Wise                            9,670(2)                -                      9,670             *
Grant E. Sims                             33,000(3)                -                     33,000             *
James H. Lytal                             6,050(4)                -                      6,050             *
H. Brent Austin                            -                       -                      -                 *
Robert G. Phillips                         1,000                   -                      1,000             *
Keith B. Forman                            1,000                   -                      1,000             *
D. Mark Leland                             -                       -                      -                 *
Michael B. Bracy                           5,000                 1,500                    6,500             *
H. Douglas Church                          -                     1,500                    1,500             *
Malcolm Wallop                             -                     1,500                    1,500             *
Robert L. Cavnar                           -                       -                       -                -
Joel Richards III                          -                       -                       -                -
Mark A. Searles                            -                       -                       -                -
Jeffrey I. Beason                          -                       -                       -                -
Britton White Jr.                          -                       -                       -                -
Byron Allumbaugh                           -                       -                       -                -
Juan Carlos Braniff                        -                       -                       -                -
Peter T. Flawn                             -                       -                       -                -
James F. Gibbons                           -                       -                       -                -
Ben F. Love                                -                       -                       -                -
Kenneth L. Smalley                         -                       -                       -                -

- --------
* Less than 1%.

(1) In accordance with SEC regulations under Section 13(d) of the Securities
Exchange Act of 1934, as amended, the percent shown in this column for each
Common Unit holder represents the number of Common Units owned by such holder
plus the derivative securities (on an as converted basis) owned by such holder
divided by the number of Common Units outstanding plus the number of derivative
securities (on an as converted basis) owned by such holder.

(2) This number excludes 6,960 units owned by Mr. Wise's children, for which he
disclaims beneficial ownership.

(3) Mr. Sims disclaims beneficial ownership of 2,0000 Common Units held in
trust for his 18 year old son.

(4) Mr. Lytal may deemed to be the beneficial owner of 34 Common Units owned by
Mr. Lytal's son, a minor.

</TABLE>





                                       11
<PAGE>   12


         (b) Each person identified in (a) above has the sole power to vote or
direct the vote and the sole power to dispose or direct the disposition of the
Common Units beneficially owned by such person.

         (c) Except as otherwise described herein, none of the persons
identified in (a) above have effected any transactions in Common Units during
the past 60 days.

         (d) Not applicable.

         (e) Not applicable.

ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
TO SECURITIES OF THE ISSUER.

         LGPC serves as general partner of the Issuer in accordance with the
Amended and Restated Agreement of Limited Partnership of the Issuer dated
February 19, 1993, previously filed as Exhibit 10.41 to Amendment No.1 to
DeepTech's Registration Statement on Form S-1, File No. 33-73538 and is
incorporated herein by reference. Amendment Number 1 to the Partnership
Agreement was previously filed as Exhibit 10.1 to the Issuer's Current Report on
Form 8-K dated December 31, 1996, and is incorporated herein by reference.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS.

Exhibit 1:        Joint Filing Agreement among LGPC, Holdings, DeepTech, El Paso
                  Energy, El Paso Tennessee, El Paso Field Services and EPEC
                  Deepwater.




                                       12
<PAGE>   13
Exhibit 2:        List of all directors and executive officers of each of LGPC,
                  Holdings, DeepTech, El Paso Energy, El Paso Tennessee, El Paso
                  Field Services and EPEC Deepwater.

Exhibit 3:        A copy of the Partnership Agreement of the Issuer was
                  previously filed as Exhibit 10.41 to Amendment No. 1 to
                  DeepTech's Registration Statement on Form S-1, File No.
                  33-73538 and is incorporated herein by reference. Amendment
                  Number 1 to the Partnership Agreement was previously filed as
                  Exhibit 10.1 to the Issuer's Current Report on Form 8-K dated
                  December 31, 1996, and is incorporated herein by reference.

Exhibit 4:        A copy of the Contribution Agreement was previously filed as
                  Exhibit C to the Issuer's Proxy Statement dated February 8,
                  1999, and is incorporated herein by reference.




                                       13
<PAGE>   14



                                    SIGNATURE

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this Statement is true, complete and
correct.


<TABLE>
<S>                                <C>
Dated:  June 1, 1999               Leviathan Gas Pipeline Company


                                   By: /s/ GRANT E. SIMS
                                      -------------------------------------
                                   Name: Grant E. Sims
                                        -----------------------------------
                                   Title: Chief Executive Officer
                                         ----------------------------------


Dated:  June 1, 1999               Leviathan Holdings Company




                                   By: /s/ GRANT E. SIMS
                                      -------------------------------------
                                   Name: Grant E. Sims
                                        -----------------------------------
                                   Title: Senior Vice President
                                         ----------------------------------


Dated:  June 1, 1999               DeepTech International, Inc.



                                   By: /s/ GRANT E. SIMS
                                      -------------------------------------
                                   Name: Grant E. Sims
                                        -----------------------------------
                                   Title: Senior Vice President
                                         ----------------------------------


Dated:  June 1, 1999               El Paso Energy Corporation



                                   By: /s/ JEFFREY I. BEASON
                                      -------------------------------------
                                   Name: Jeffrey I. Beason
                                        -----------------------------------
                                   Title: Vice President and Controller
                                         ----------------------------------
</TABLE>




                                       14
<PAGE>   15


<TABLE>
<S>                                <C>
Dated:  June 1, 1999               El Paso Tennessee Pipeline Co.



                                   By: /s/ JEFFREY I. BEASON
                                      -------------------------------------
                                   Name: Jeffrey I. Beason
                                        -----------------------------------
                                   Title: Vice President and Controller
                                         ----------------------------------


Dated:  June 1, 1999               El Paso Field Services Company



                                   By: /s/ JEFFREY I. BEASON
                                      -------------------------------------
                                   Name: Jeffrey I. Beason
                                        -----------------------------------
                                   Title: Vice President and Controller
                                         ----------------------------------


Dated:  June 1, 1999               EPEC Deepwater Gathering Company



                                   By: /s/ JEFFREY I. BEASON
                                      -------------------------------------
                                   Name: Jeffrey I. Beason
                                        -----------------------------------
                                   Title: Vice President and Controller
                                         ----------------------------------
</TABLE>




                                       15
<PAGE>   16


                                INDEX TO EXHIBITS

<TABLE>
<CAPTION>
    EXHIBIT
    NUMBER                        DESCRIPTION
    ------                        -----------
<S>                    <C>
      1.*              Joint Filing Agreement among El Paso Energy Corporation,
                       El Paso Tennessee Pipeline Co., El Paso Field Services
                       Company, EPEC Deepwater Gathering Company, DeepTech
                       International Inc., Leviathan Holdings Company and
                       Leviathan Gas Pipeline Company.

      2.*              List of all directors and executive officers of each of
                       El Paso Energy Corporation, El Paso Tennessee Pipeline
                       Co., El Paso Field Services Company, EPEC Deepwater
                       Gathering Company, DeepTech International Inc., Leviathan
                       Holdings Company and Leviathan Gas Pipeline Company.

      3.               A copy of the Partnership Agreement of the Issuer was
                       previously filed as Exhibit 10.41 to Amendment No. 1 to
                       DeepTech's Registration Statement on Form S-1, File No.
                       33-73538 and is incorporated herein by reference.
                       Amendment Number 1 to the Partnership Agreement was
                       previously filed as Exhibit 10.1 to the Issuer's Current
                       Report on Form 8-k dated December 31, 1996, and is
                       incorporated herein by reference.

      4.               A copy of the Contribution Agreement was previously filed
                       as Exhibit C to the Issuer's Proxy Statement dated
                       February 8, 1999, and is incorporated herein by
                       reference.
</TABLE>


- ----------------------------------
* Filed herewith.




                                       16

<PAGE>   1


                                    EXHIBIT 1

                             JOINT FILING AGREEMENT


         In accordance with Rule 13d-1(k) of Regulation 13D of the Securities
Exchange Act of 1934, as amended, the persons or entities below agree to the
joint filing on behalf of each of them of this Statement on Schedule 13D
(including any and all amendments thereto) with respect to the Common Units of
Leviathan Gas Pipeline Partners, L.P., and further agree that this Joint Filing
Agreement be included as an Exhibit to such joint filings. In evidence thereof
the undersigned, being duly authorized, hereby execute this Agreement as of the
1st day of June, 1999.

<TABLE>
<S>                                <C>
                                   Leviathan Gas Pipeline Company


                                   By: /s/ GRANT E. SIMS
                                      -------------------------------------
                                   Name:   Grant E. Sims
                                        -----------------------------------
                                   Title:  Chief Executive Officer
                                         ----------------------------------



                                   Leviathan Holdings Company


                                   By: /s/ GRANT E. SIMS
                                      -------------------------------------
                                   Name:   Grant E. Sims
                                        -----------------------------------
                                   Title:  Senior Vice President
                                         ----------------------------------



                                   DeepTech International, Inc.


                                   By: /s/ GRANT E. SIMS
                                      -------------------------------------
                                   Name:   Grant E. Sims
                                        -----------------------------------
                                   Title:  Senior Vice President
                                         ----------------------------------
</TABLE>




                                       17
<PAGE>   2
<TABLE>
<S>                                <C>
                                   El Paso Energy Corporation


                                   By: /s/ JEFFERY I. BEASON
                                      -------------------------------------
                                   Name:   Jeffery I. Beason
                                        -----------------------------------
                                   Title:  Vice President and Controller
                                         ----------------------------------


                                   El Paso Tennessee Pipeline Co.


                                   By: /s/ JEFFERY I. BEASON
                                      -------------------------------------
                                   Name:   Jeffery I. Beason
                                        -----------------------------------
                                   Title:  Vice President and Controller
                                         ----------------------------------


                                   El Paso Field Services Company


                                   By: /s/ JEFFERY I. BEASON
                                      -------------------------------------
                                   Name:   Jeffery I. Beason
                                        -----------------------------------
                                   Title:  Vice President and Controller
                                         ----------------------------------


                                   EPEC Deepwater Gathering Company


                                   By: /s/ JEFFERY I. BEASON
                                      -------------------------------------
                                   Name:   Jeffery I. Beason
                                        -----------------------------------
                                   Title:  Vice President and Controller
                                         ----------------------------------
</TABLE>




                                       18

<PAGE>   1


                                    EXHIBIT 2

                     DIRECTORS, MANAGERS, EXECUTIVE OFFICERS
                             OR CONTROLLING PERSONS

1. Leviathan Gas Pipeline Company. The name, present principal occupation or
employment, and the name of any corporation or the organization in which such
employment is conducted, of each of the directors and executive officers of
Leviathan Gas Pipeline Company is set forth below.

<TABLE>
<CAPTION>
Name and Citizenship              Business Address                              Position/Principal Occupation
Executive Officers & Directors:
- -----------------------------------------------------------------------------------------------------------------------
<S>                               <C>                                           <C>

William A. Wise                   Leviathan Gas Pipeline Company                Director and Chairman of the Board
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert G. Phillips                Leviathan Gas Pipeline Company                Director and Executive Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
H. Brent Austin                   Leviathan Gas Pipeline Company                Director and Executive Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Grant E. Sims                     Leviathan Gas Pipeline Company                Director and Chief Executive Officer
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
James H. Lytal                    Leviathan Gas Pipeline Company                Director and President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Keith B. Forman                   Leviathan Gas Pipeline Company                Vice President and Chief Financial Officer
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
D. Mark Leland                    Leviathan Gas Pipeline Company                Vice President and Controller
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Malcolm Wallop                    Leviathan Gas Pipeline Company                Director
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Michael B. Bracy                  Leviathan Gas Pipeline Company                Director
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
H. Douglas Church                 Leviathan Gas Pipeline Company                Director
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
</TABLE>




                                       19
<PAGE>   2


2. Leviathan Holdings Company. The name, present principal occupation or
employment, and the name of any corporation or the organization in which such
employment is conducted, of each of the directors and executive officers of
Leviathan Gas Pipeline Company is set forth below.

<TABLE>
<CAPTION>
Name and Citizenship              Business Address                              Position/Principal Occupation
Executive Officers & Directors:
- -----------------------------------------------------------------------------------------------------------------------
<S>                               <C>                                           <C>

William A. Wise                   Leviathan Holdings Company                    Director and Chairman of the Board
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert G. Phillips                Leviathan Holdings Company                    Director and President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
H. Brent Austin                   Leviathan Holdings Company                    Director and Executive Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Grant E. Sims                     Leviathan Holdings Company                    Senior Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert L. Cavnar                  Leviathan Holdings Company                    Senior Vice President and
(United States Citizen)           El Paso Energy Building                       Chief Operating Officer
                                  1001 Louisiana Street
                                  Houston, Texas 77002
</TABLE>




                                       20
<PAGE>   3


3. DeepTech International Inc. The name, present principal occupation or
employment, and the name of any corporation or the organization in which such
employment is conducted, of each of the directors and executive officers of
Leviathan Gas Pipeline Company is set forth below.

<TABLE>
<CAPTION>
Name and Citizenship              Business Address                              Position/Principal Occupation
Executive Officers & Directors:
- -----------------------------------------------------------------------------------------------------------------------
<S>                               <C>                                           <C>

William A. Wise                   DeepTech International Inc.                   Director and Chairman of the Board
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert G. Phillips                DeepTech International Inc.                   Director and President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
H. Brent Austin                   DeepTech International Inc.                   Director and Executive Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Grant E. Sims                     DeepTech International Inc.                   Senior Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert L. Cavnar                  DeepTech International Inc.                   Senior Vice President and
(United States Citizen)           El Paso Energy Building                       Chief Operating Officer
                                  1001 Louisiana Street
                                  Houston, Texas 77002
</TABLE>




                                       21
<PAGE>   4
4. El Paso Energy Corporation. The name, present principal occupation or
employment, and the name of any corporation or the organization in which such
employment is conducted, of each of the directors and executive officers of
Leviathan Gas Pipeline Company is set forth below.

<TABLE>
<CAPTION>
Name and Citizenship              Business Address                              Position/Principal Occupation
Executive Officers & Directors:
- -----------------------------------------------------------------------------------------------------------------------
<S>                               <C>                                           <C>

William A. Wise                   El Paso Energy Corporation                    Chairman of the Board, President and
(United States Citizen)           El Paso Energy Building                       Chief Executive Officer
                                  1001 Louisiana Street
                                  Houston, Texas 77002
H. Brent Austin                   El Paso Energy Corporation                    Executive Vice President and Chief
(United States Citizen)           El Paso Energy Building                       Financial Officer
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Joel Richards III                 El Paso Energy Corporation                    Executive Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Mark A. Searles                   El Paso Energy Corporation                    Senior Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Jeffrey I. Beason                 El Paso Energy Corporation                    Vice President and Controller
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
C. Dana Rice                      El Paso Energy Corporation                    Vice President and Treasurer
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Britton White Jr.                 El Paso Energy Corporation                    Executive Vice President and General
(United States Citizen)           El Paso Energy Building                       Counsel
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Byron Allumbaugh                  Ralphs Grocery Company                        Director of El Paso/Retired Former
(United States Citizen)           610 Newport Center Drive, Suite 210           Chairman, Ralphs Grocery Company
                                  Newport Beach, CA 92660
Juan Carlos Braniff               Presidente Masaryk No. 8                      Director of El Paso/Deputy CEO
(Mexican Citizen)                 6th Floor                                     Insurance & Pension Sector Grupo
                                  Col. Bosques de Chapultepec                   Financiero Bancomer
                                  Mexico, D.F. 11588
Peter T. Flawn                    University of Texas                           Director of El Paso
(United States Citizen)           23rd and San Jacinto                          President Emeritus, University of
                                  Room GEO 526                                  Texas at Austin
                                  Austin, Texas 78705
James F. Gibbons                  Stanford University                           Director of El Paso/Former Dean of
(United States Citizen)           Paul G. Allen Center for Integrated Systems   Engineering, Stanford University
                                  Room 201, Mail Drop 4075
                                  Stanford, CA 94305
Ben F. Love                       Chase Bank of Texas                           Director of El Paso/Investor
(United States Citizen)           600 Travis, 18th Floor                        Former Chairman and CEO, Texas
                                  Houston, Texas 77002                          Commerce Bancshares
Kenneth L. Smalley                5 Queensview Court                            Director of El Paso/Retired Former
(United States Citizen)           Dallas, Texas 75225                           President of Phillips 66 Natural Gas
                                                                                Company
Malcolm Wallop                    Frontiers of Freedom                          Director of El Paso
(United States Citizen)           Western Strategy Group                        Chairman, Western Strategy Group and
                                  1100 Wilson Boulevard, Suite 1400             Frontiers of Freedom
                                  Arlington, VA 22209
</TABLE>


<PAGE>   5



5. El Paso Tennessee Pipeline Co. The name, present principal occupation or
employment, and the name of any corporation or the organization in which such
employment is conducted, of each of the directors and executive officers of El
Paso Tennessee Gas Company is set forth below.

<TABLE>
<CAPTION>
Name and Citizenship              Business Address                              Position/Principal Occupation
Executive Officers & Directors:
- -----------------------------------------------------------------------------------------------------------------------
<S>                               <C>                                           <C>

William A. Wise                   El Paso Energy Corporation                    Chairman of the Board, President and
(United States Citizen)           El Paso Energy Building                       Chief Executive Officer
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Joel Richards III                 El Paso Energy Corporation                    Director and Executive Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
H. Brent Austin                   El Paso Energy Corporation                    Director, Executive Vice President
(United States Citizen)           El Paso Energy Building                       and Chief Financial Officer
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Jeffrey I. Beason                 El Paso Energy Corporation                    Director, Vice President and Controller
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Kenneth L. Smalley                El Paso Energy Corporation                    Director
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Britton White, Jr.                El Paso Energy Corporation                    Director, Executive Vice President and
(United States Citizen)           El Paso Energy Building                       General Counsel
                                  1001 Louisiana Street
                                  Houston, Texas 77002
</TABLE>


<PAGE>   6


6. El Paso Field Services Company. The name, present principal occupation or
employment, and the name of any corporation or the organization in which such
employment is conducted, of each of the directors and executive officers of El
Paso Field Services Company is set forth below.

<TABLE>
<CAPTION>
Name and Citizenship              Business Address                              Position/Principal Occupation
Executive Officers & Directors:
- -----------------------------------------------------------------------------------------------------------------------
<S>                               <C>                                           <C>

William A. Wise                   El Paso Energy Corporation                    Chairman of the Board
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert G. Phillips                El Paso Energy Corporation                    Director and President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
H. Brent Austin                   El Paso Energy Corporation                    Director and Executive Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Jeffrey I. Beason                 El Paso Energy Corporation                    Vice President and Controller
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert L. Cavnar                  El Paso Energy Corporation                    Senior Vice President and Chief
(United States Citizen)           El Paso Energy Building                       Operating Officer
                                  1001 Louisiana Street
                                  Houston, Texas 77002
</TABLE>


<PAGE>   7

7. EPEC Deepwater Gathering Company. The name, present principal occupation or
employment, and the name of any corporation or the organization in which such
employment is conducted, of each of the directors and executive officers of EPEC
Deepwater Gathering Company is set forth below.

<TABLE>
<CAPTION>
Name and Citizenship              Business Address                              Position/Principal Occupation
Executive Officers & Directors:
- -----------------------------------------------------------------------------------------------------------------------
<S>                               <C>                                           <C>

William A. Wise                   El Paso Energy Corporation                    Chairman of the Board
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert G. Phillips                El Paso Energy Corporation                    Director and President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
H. Brent Austin                   El Paso Energy Corporation                    Director and Executive Vice President
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Jeffrey I. Beason                 El Paso Energy Corporation                    Vice President and Controller
(United States Citizen)           El Paso Energy Building
                                  1001 Louisiana Street
                                  Houston, Texas 77002
Robert L. Cavnar                  El Paso Energy Corporation                    Senior Vice President and
(United States Citizen)           El Paso Energy Building                       Chief Operating Officer
                                  1001 Louisiana Street
                                  Houston, Texas 77002
</TABLE>




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