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                                                                   EXHIBIT 10.78

                            FOURTH AMENDMENT TO THE
                                MIRANT SERVICES
                     BARGAINING UNIT EMPLOYEE SAVINGS PLAN

         WHEREAS, Mirant Services, LLC (the "Company") heretofore adopted the
Mirant Services Bargaining Unit Employee Savings Plan (the "Plan"), effective
December 19, 2000, and subsequently amended and restated effective as of April
2, 2001;

         WHEREAS, the Company desires to amend the Plan regarding the employee
contribution limitation applicable to certain employees; and

         WHEREAS, the Americas Benefits Committee (the "Committee") is
authorized pursuant to Section 15.1 of the Plan to amend the Plan at any time,
provided such amendment does not involve a substantial increase in cost to the
Company.

         NOW, THEREFORE, the Committee hereby amends the Plan as follows, to be
effective as of June 1, 2002:

                                       I.

         SECTION 6.2 OF THE PLAN SHALL BE DELETED IN ITS ENTIRETY AND REPLACED
WITH THE FOLLOWING NEW SECTION 6.2:

         6.2      Correction of Contributions in Excess of Section 415 Limits.
If the Annual Additions for a Participant exceed the limits of Section 6.1 as a
result of the allocation of forfeitures, if any, a reasonable error in
estimating a Participant's annual compensation for purposes of the Plan, a
reasonable error in determining the amount of elective deferrals (within the
meaning of Section 402(g)(3) of the Code) that may be made with respect to any
individual, or under other limited facts and circumstances that the
Commissioner of the Treasury finds justify the availability of the rules set
forth in this Section 6.2, the excess amounts shall not be deemed Annual
Additions if they are treated in accordance with any one or more or any
combination of the following:

         (a)      return to the Participant that portion, or all, of his
Voluntary Participant Contributions (as adjusted for income and loss) as is
necessary to ensure compliance with Section 6.1;

         (b)      distribute to the Participant that portion, or all, of his
Elective Employer Contributions (as adjusted for income and loss) as is
necessary to ensure compliance with Section 6.1; and

         (c)      forfeiture of that portion, or all, of the Employer Matching
Contributions (as adjusted for income and loss) and any forfeitures of Employer
contributions that were allocated to the Participant's Account (as adjusted for
income and loss) as is necessary to ensure compliance with Section 6.1.

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         (d)      forfeiture of that portion, or all, of the Discretionary
Profit Sharing Contributions that were allocated to the Participant's Account
(as adjusted for income and loss) as is necessary to ensure compliance with
Section 6.1.

         Any amounts distributed or returned to the Participant under (a) or
(b) above shall be disregarded for purposes of the Actual Deferral Percentage
Test.

Any amounts forfeited under this Section 6.2 shall be held in a suspense
account (separate from the Suspense Account established under Section 10.3) and
shall be applied, subject to Section 6.1, to reduce the next ensuing Employing
Company contribution. Such application shall be made prior to any Employing
Company contributions that would constitute Annual Additions. No income or
investment gains and losses shall be allocated to the suspense account provided
for under this Section 6.2. If any amount remains in a suspense account
provided for under this Section 6.2 upon termination of this Plan, such amount
will revert to the Employing Companies notwithstanding any other provision of
this Plan.

                                      II.

         SECTION 17.2(C) OF THE PLAN SHALL BE DELETED IN ITS ENTIRETY AND
REPLACED WITH THE FOLLOWING NEW SECTION 17.2(C):

                  (c)      The rate of Elective Employer Contributions (Section
         4.1) and Voluntary Participant Contributions (Section 4.6) shall be 1%
         to 30% of Compensation.

                                      III.

         EXCEPT AS AMENDED HEREIN BY THIS FOURTH AMENDMENT, THE PLAN SHALL
REMAIN IN FULL FORCE AND EFFECT AS AMENDED AND RESTATED BY THE COMPANY PRIOR TO
THE ADOPTION OF THIS FOURTH AMENDMENT.

         IN WITNESS WHEREOF, the Committee, through a duly authorized officer
of the Company, has adopted this Fourth Amendment to the Plan this 22nd day of
May, 2002 to be effective as provided herein.

                                      MIRANT SERVICES, LLC

                                      By: /s/ Dianne W. Davenport
                                         ----------------------------
                                      Title:  Vice President
                                            -------------------------

                                       2<PAGE>
                                                                   EXHIBIT 10.79

                             FIFTH AMENDMENT TO THE
                                MIRANT SERVICES
                     BARGAINING UNIT EMPLOYEE SAVINGS PLAN

         WHEREAS, Mirant Services, LLC (the "Company") heretofore adopted the
Mirant Services Bargaining Unit Employee Savings Plan (the "Plan"), effective
December 19, 2000, and subsequently amended and restated effective as of April
2, 2001;

         WHEREAS, the Company desires to amend the Plan in order to obtain a
favorable determination letter ruling regarding the qualified status of the
Plan; and

         WHEREAS, the Americas Benefits Committee (the "Committee") is
authorized pursuant to Section 15.1 of the Plan to amend the Plan at any time,
provided such amendment does not involve a substantial increase in cost to the
Company.

         NOW, THEREFORE, the Committee hereby amends the Plan as follows, to be
effective as of December 19, 2000:

                                       I.

         SECTION 2.23 OF THE PLAN SHALL BE DELETED IN ITS ENTIRETY AND REPLACED
WITH THE FOLLOWING NEW SECTION 2.23:

         2.23     "Employee" shall mean each individual who is employed by an
Affiliated Employer under common law and each individual who is required to be
treated as an employee pursuant to the "leased employee" rules of Code Section
414(n) other than a leased employee described in Code Section 414(n)(5). A
"leased employee" is any person (other than an employee of the recipient) who
pursuant to an agreement between the recipient and any other person (hereafter
the "leasing organization") has performed services for the recipient (or for
the recipient and related persons, as determined in accordance with Code
Section 414(n)(6)) on a substantially full-time basis for a period of at least
one (1) year, and such services are performed under the primary direction or
control by the recipient.

                                      II.

         SECTION 2.31 OF THE PLAN SHALL BE DELETED IN ITS ENTIRETY AND REPLACED
WITH THE FOLLOWING NEW SECTION 2.31:

         2.31     "Highly Compensated Employee" shall mean (in accordance with
and subject to Code Section 414(q) and any regulations, rulings, notices or
procedures thereunder), with respect to any Plan Year: (a) any Employee who was
a five percent (5%) owner of Mirant Corporation or an Affiliated Employer (as
determined pursuant to Code Section 416) during the Plan Year or the
immediately preceding Plan Year, or (b) any Employee who (1) earned more than
$85,000 in the preceding Plan Year and (2) falls within the "top-paid group,"
as defined in Code Section 414(q) (excluding those employees described in Code
Section 414(q)(8) for such

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purpose). The $85,000 amount shall be adjusted for inflation and for short Plan
Years, pursuant to Code Section 414(q). In determining whether an Employee is a
Highly Compensated Employee, the Committee may make any elections authorized
under applicable regulations, rulings, notices, or revenue procedures.

                                      III.

         SECTION 4.5(A) OF THE PLAN SHALL BE DELETED IN ITS ENTIRETY AND
REPLACED WITH THE FOLLOWING NEW SECTION 4.5(A):

                  (a)      Actual Deferral Percentage Test. The Plan shall
         satisfy the nondiscrimination test of Section 401(k)(3) of the Code,
         under which no Elective Employer Contributions shall be made that
         would cause the Actual Deferral Percentage for Eligible Participants
         who are Highly Compensated Employees to exceed either subsection
         4.5(a)(1) or (2) as follows:

                           (1)      The Average Actual Deferral Percentage for
                  the Eligible Participants who are Highly Compensated
                  Employees in the current Plan Year shall not exceed the
                  Average Actual Deferral Percentage for the prior Plan Year
                  for Eligible Participants who were Non-Highly Compensated
                  Employees for the prior Plan Year multiplied by 1.25; or

                           (2)      The Average Actual Deferral Percentage for
                  Eligible Participants who are Highly Compensated Employees in
                  the current Plan Year shall not exceed the Average Actual
                  Deferral Percentage for Eligible Participants who were
                  Non-Highly Compensated Employees in the prior Plan Year
                  multiplied by two (2), provided that the Average Actual
                  Deferral Percentage for Eligible Participants who are Highly
                  Compensated Employees in the current Plan Year does not
                  exceed the Average Actual Deferral Percentage for the prior
                  Plan Year for Eligible Participants who were Non-Highly
                  Compensated Employees in the prior Plan Year by more than two
                  (2) percentage points.

                           At the election of the Committee, and upon amendment
                  to the Plan, the current year Average Actual Deferral
                  Percentage for current year Non-Highly Compensated Employees
                  may be substituted for the prior year Average Actual Deferral
                  Percentage. However, once an election is made to utilize such
                  current year Average Actual Deferral Percentage in
                  determining the Actual Deferral Percentage, the Committee may
                  not revoke such election without the approval of the Internal
                  Revenue Service, to the extent required under Code Section
                  401(k)(3)(A). Notwithstanding the foregoing, for the 2000
                  Plan Year the Average Actual Deferral Percentage of
                  Non-Highly Compensated Employees shall be deemed to be three
                  percent (3%) or, if the Committee elects in accordance with
                  Code Section 401(k)(3)(E), the actual Average Actual Deferral
                  Percentage of Non-Highly Compensated Employees for the 2000
                  Plan Year.

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                                      IV.

         EXCEPT AS AMENDED HEREIN BY THIS FIFTH AMENDMENT, THE PLAN SHALL
REMAIN IN FULL FORCE AND EFFECT AS AMENDED AND RESTATED BY THE COMPANY PRIOR TO
THE ADOPTION OF THIS FIFTH AMENDMENT.

         IN WITNESS WHEREOF, the Committee, through a duly authorized officer
of the Company, has adopted this Fifth Amendment to the Plan this 14th day of
November, 2002 to be effective as provided herein.

                                      MIRANT SERVICES, LLC

                                      By: /s/ Dianne W. Davenport
                                         -----------------------------
                                      Title:  Vice President
                                            --------------------------

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