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                                                                   EXHIBIT 10.76

                             FIRST AMENDMENT TO THE
                                 MIRANT SERVICES
                      BARGAINING UNIT EMPLOYEE SAVINGS PLAN
            (AS AMENDED AND RESTATED EFFECTIVE AS OF JANUARY 1, 2004)

     WHEREAS, Mirant Services, LLC (the "Company") heretofore adopted the Mirant
Services Bargaining Unit Employee Savings Plan (the "Plan"), effective December
19, 2000, which Plan was subsequently amended, and amended and restated in its
entirety, from time to time and was most recently amended and restated in its
entirety effective as of January 1, 2004;

     WHEREAS, the Company desires to make various changes to 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, effective as of the
respective effective dates set forth below, as follows:

                                       I.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 3.1 OF THE PLAN IS AMENDED IN ITS
ENTIRETY TO READ AS FOLLOWS:

     "3.1   ELIGIBILITY REQUIREMENTS. Each individual who was a Participant on
January 1, 2004 will continue to participate in the Plan. Each other Eligible
Employee may elect to participate in the Plan as of any Enrollment Date after he
has completed a Year of Service, or such earlier time if so provided in Article
XVII or a schedule attached hereto for his collective bargaining unit. An
Eligible Employee shall make an election to participate by authorizing
deductions from or reduction of his Compensation as contributions to the Plan in
accordance with Article IV, and directing the investment of such contributions
in accordance with Article VIII. Such Compensation deduction and/or reduction
authorization and investment direction shall be made in accordance with the
procedures established from time to time by the Committee."

                                       II.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 3.3 OF THE PLAN IS AMENDED IN ITS
ENTIRETY TO READ AS FOLLOWS:

     "3.3   CHANGE IN ELIGIBILITY. In the event that an Employee's status
changes such that he is no longer eligible to participate under the Mirant
Services Employee Savings Plan, but instead becomes an Eligible Employee under
this Plan (i) his pre-tax, after-tax and/or rollover contribution subaccounts
under such plan shall be transferred to his corresponding Elective Employer
Contribution, Voluntary Participant Contribution, and/or Rollover Contribution
subaccounts in his Account under this Plan, (ii) if and when he becomes fully
vested in his matching contribution subaccount under that plan, such matching
contribution subaccount shall be transferred to his Employer Matching
Contribution subaccount in this Plan, (iii) if and when he becomes fully

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vested in his discretionary profit sharing contribution subaccount under that
plan, such discretionary profit sharing contribution subaccount shall be
transferred to his Discretionary Profit Sharing Contribution subaccount in this
Plan, and (iv) if and when he becomes fully vested in his fixed profit sharing
Contribution subaccount under that plan, such fixed profit sharing contribution
subaccount shall be transferred to his Discretionary Profit Sharing Contribution
subaccount in this Plan. All amounts transferred to this Plan in accordance with
this Section 3.3, including the outstanding balance of any loans, shall be
subject to all of the other provisions of this Plan. Any outstanding loan
transferred with such accounts shall be considered a loan from this Plan
pursuant to Section 11.7 hereof. Finally, no such transfer shall eliminate an
optional form of benefit in violation of Code Section 411(d)(6)."

                                      III.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 5.1 OF THE PLAN IS AMENDED IN ITS
ENTIRETY TO READ AS FOLLOWS:

     "5.1   AMOUNT OF EMPLOYER MATCHING CONTRIBUTIONS. Subject to the provisions
of Sections 6.1 and 6.2, each Employing Company shall contribute an Employer
Matching Contribution on behalf of each Participant in its employ as provided in
Article XVII or a schedule attached hereto for his collective bargaining unit.
The Employer Matching Contribution shall be allocated first to the Elective
Employer Contributions made on a Participant's behalf. Notwithstanding the
foregoing, in the event a Participant is eligible to elect to have Elective
Employer Contributions and Voluntary Participant Contributions allocated to his
Account prior to his eligibility for allocation of Employer Matching
Contributions, only such Elective Employer Contributions and Voluntary
Participant Contributions as are allocated to the Participant's Account after
his eligibility for Employer Matching Contributions shall be taken into account
in determining the amount of Employer Matching Contributions to be allocated to
the Participant's Account for a Plan Year. If, as determined as of the end of a
Plan Year, a Participant received Employer Matching Contributions of less than
the maximum percentage or amount allowable (as specified in Article XVII or a
schedule attached hereto) for the Plan Year because of limitations imposed on a
payroll period basis, the Employing Company may make an additional Employer
Matching Contribution on behalf of such Participant, not to exceed the maximum
percentage or amount allowable (as specified in Article XVII or a schedule
attached hereto) for the Plan Year."

                                       IV.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 5.3 OF THE PLAN IS AMENDED IN ITS
ENTIRETY TO READ AS FOLLOWS:

     "5.3   DISCRETIONARY PROFIT SHARING CONTRIBUTION. Each Employing Company
may, in its sole and absolute discretion, make an annual Discretionary Profit
Sharing Contribution to each Allocation Group for the Accounts of Eligible
Participants in its employ as provided in Article XVII or a schedule attached
hereto for a Participant's collective bargaining unit, provided such
Participants have satisfied the eligibility requirements of Section 3.1 and are
Eligible Employees as of the last day of the Plan Year for which such
Discretionary Profit Sharing Contribution relates. The Discretionary Profit
Sharing Contribution may be made in a whole dollar amount or as a percentage of
the Profit Sharing Compensation (as defined below) of each Eligible Participant
eligible to receive an allocation of such Discretionary Profit Sharing
Contribution under this

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Section 5.3, and may be made without regard to the current or accumulated net
profits of the Employer. For this purpose, the term "Profit Sharing
Compensation" shall mean a Participant's Compensation as defined in Section 2.13
of the Plan plus (i) any shift pay or Sunday premium paid to him during the
applicable period and (ii) any short-term incentive pay awarded to him under the
Mirant Corporation Omnibus Incentive Compensation Plan during the applicable
period, to the extent such payments do not exceed 150% of the Participant's
Compensation as defined in Section 2.13 of the Plan. Discretionary Profit
Sharing Contributions shall be paid to the Trustee no later than the time
prescribed by law for filing the federal income tax return of the Employing
Company, including extensions, for the taxable year ending within the Plan Year
for the Discretionary Profit Sharing Contribution in question. Discretionary
Profit Sharing Contributions will be allocated to each Eligible Participant's
Discretionary Profit Sharing Contribution subaccount in accordance with the
following provisions:

            (a)    The Discretionary Profit Sharing made for an Allocation Group
     will be allocated to the Account of each Eligible Participant who is a
     member of that Allocation Group in the ratio that the Profit Sharing
     Compensation of each Eligible Participant who is a member of that
     Allocation Group bears to the total Profit Sharing Compensation of all
     Eligible Participants who are members of that Allocation Group.

            (b)    The term "Allocation Group" shall mean the defined groups of
     Eligible Participants as set forth on Appendix B to the Plan, as updated
     from time to time."

                                       V.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 8.8 OF THE PLAN IS AMENDED IN ITS
ENTIRETY TO READ AS FOLLOWS:

     "8.8   TRANSFERRED SOUTHERN STOCK. All Southern Stock received by the Plan
pursuant to Section 8.7 of the Plan shall be held in a separate Investment Fund
as provided in Section 8.7 of the Plan and shall be subject to the investment
restrictions set forth in Section 8.7 of the Plan. The Investment Fund
containing this Southern Stock shall be eliminated as an Investment Fund under
the Plan as of March 31, 2006, and any Southern Stock that remains in such
Investment Fund on such date shall be reinvested as determined by the Investment
Review Committee."

                                       VI.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 12.1(A) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(a)   If a Participant's employment with the Affiliated Employers
     is terminated as a result of his retirement on or after his Normal
     Retirement Date, in addition to the withdrawal options under Section 11.1,
     the entire balance credited to his Account shall be payable to him in a
     single lump sum distribution at such time requested by the Participant
     pursuant to Section 12.6 and in accordance with the procedures established
     by the Committee. The distribution shall commence as soon as practicable
     after the Valuation Date selected by the Participant."

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                                      VII.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.1(B) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(b)   The rate of Employer Matching Contributions (Section 5.1)
     shall be 75% of the Participant's Elective Employer Contributions and
     Voluntary Participant Contributions during each payroll period, provided
     that Employer Matching Contributions shall not be made on any such Elective
     Employer Contributions and Voluntary Participant Contributions to the
     extent they exceed six percent (6%) of the Participant's Compensation for
     such payroll period."

                                      VIII.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.1(C) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(c)   Eligibility to participate in the Plan shall be as soon as
     administratively feasible following the date one Hour of Service is
     completed."

                                       IX.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.2(B) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(b)   Eligibility to participate in the Plan shall be as soon as
     administratively feasible following the date one Hour of Service is
     completed. Notwithstanding the foregoing, initial eligibility to
     participate in the Plan for a Discretionary Profit Sharing Contribution
     (Section 17.2(f)) shall be the Plan Year during which one Year of Service
     is completed."

                                       X.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.2(E) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(e)   The rate of Employer Matching Contributions (Section 5.1)
     shall be 100% of the Participant's Elective Employer Contributions and
     Voluntary Participant Contributions during each payroll period, provided
     that Employer Matching Contributions shall not be made on any such Elective
     Employer Contributions and Voluntary Participant Contributions to the
     extent they exceed four percent (4%) of the Participant's Compensation for
     such payroll period."

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                                       XI.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.3(B) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(b)   Eligibility to participate in the Plan shall be as soon as
     administratively feasible following the date one Hour of Service is
     completed. Notwithstanding the foregoing, initial eligibility to
     participate in the Plan for a Discretionary Profit Sharing Contribution
     (Section 17.3(h)) shall be the Plan Year during which one Year of Service
     is completed."

                                      XII.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.3(D) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(d)   The rate of Employer Matching Contributions (Section 5.1)
     shall be 55% of the Participant's Elective Employer Contributions and
     Voluntary Participant Contributions during each payroll period, provided
     that Employer Matching Contributions shall not be made on any such Elective
     Employer Contributions and Voluntary Participant Contributions to the
     extent they exceed six percent (6%) of the Participant's Compensation for
     such payroll period."

                                      XIII.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.3(F) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(f)   Any Investment Fund containing common stock of Potomac
     Electric Power Company ("Pepco") that is transferred to this Plan pursuant
     to the provisions of Section 8.7 of the Plan shall be eliminated as an
     Investment Fund under the Plan as of March 31, 2006, and any Pepco common
     stock that remains in such Investment Fund on such date shall be reinvested
     as determined by the Investment Review Committee."

                                      XIV.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.4(C) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(c)   The rate of Employer Matching Contributions (Section 5.1)
     shall be 75% of the Participant's Elective Employer Contributions and
     Voluntary Participant Contributions during each payroll period, provided
     that Employer Matching Contributions shall not be made on any such Elective
     Employer Contributions and Voluntary Participant Contributions to the
     extent they exceed six percent (6%) of the Participant's Compensation for
     such payroll period."

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                                       XV.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.5(B) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(b)   Eligibility to participate in the Plan shall be as soon as
     administratively feasible following the date one Hour of Service is
     completed. Notwithstanding the foregoing, initial eligibility to
     participate in the Plan for a Discretionary Profit Sharing Contribution
     (Section 17.5(f)) shall be the Plan Year during which one Year of Service
     is completed."

                                      XVI.

     EFFECTIVE AS OF JANUARY 1, 2004, SECTION 17.5(D) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(d)   The rate of Employer Matching Contributions (Section 5.1)
     shall be 50% of the Participant's Elective Employer Contributions and
     Voluntary Participant Contributions during each payroll period, provided
     that Employer Matching Contributions shall not be made on any such Elective
     Employer Contributions and Voluntary Participant Contributions to the
     extent they exceed the following percentages of the Participant's
     Compensation (as applicable to the Participant's completed Years of
     Service) for such payroll period:

                   (1)  zero percent (0%) with than three (3) Years of Service;

                   (2)  up to three percent (3%) with at least three (3) but
            less than five (5) Years of Service;

                   (3)  up to four percent (4%) with at least five (5) but less
            than ten (10) Years of Service;

                   (4)  up to five percent (5%) with at least ten (10) but less
            than fifteen (15) Years of Service; or

                   (5)  up to six percent (6%) with fifteen (15) or more Years
            of Service."

                                      XVII.

     EFFECTIVE AS OF APRIL 1, 2004, SECTION 17.2(D) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(d)   Eligibility to receive an Employer Matching Contribution
     shall be as soon as administratively feasible following the date one Year
     of Service is completed. Notwithstanding the foregoing, effective on and
     after April 1, 2004, an Eligible Employee who is a member of Utility
     Workers Union of America Local #369 shall not be required to complete a
     Year of Service before receiving Employer Matching Contributions under the
     Plan but instead shall receive Employer Matching Contributions (as
     described in

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     Section 17.2(e)) on all Employer Elective Contributions and Voluntary
     Participant Contributions he makes to the Plan on or after April 1, 2004
     regardless of whether he has completed a Year of Service at that time."

                                     XVIII.

     EFFECTIVE AS OF APRIL 1, 2004, SECTION 17.2(E) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(e)   The rate of Employer Matching Contributions (Section 5.1)
     shall be 100% of the Participant's Elective Employer Contributions and
     Voluntary Participant Contributions during each payroll period, provided
     that Employer Matching Contributions shall not be made on any such Elective
     Employer Contributions and Voluntary Participant Contributions to the
     extent they exceed four percent (4%) of the Participant's Compensation for
     such payroll period. Notwithstanding the foregoing, effective on and after
     April 1, 2004, the rate of Employer Matching Contributions for an Eligible
     Employee who is a member of Utility Workers Union of America Local #369
     shall be 75% of the Participant's Elective Employer Contributions and
     Voluntary Participant Contributions during each payroll period, provided
     that Employer Matching Contributions shall not be made on any such Elective
     Employer Contributions and Voluntary Participant Contributions to the
     extent they exceed six percent (6%) of the Participant's Compensation for
     such payroll period."

                                      XIX.

     EFFECTIVE AS OF JANUARY 1, 2005, SECTION 17.2(F) OF THE PLAN IS AMENDED IN
ITS ENTIRETY TO READ AS FOLLOWS:

            "(f)   A Discretionary Profit Sharing Contribution (Section 5.3) may
     be contributed, at the discretion of the Employing Company, for
     Participants who meet the requirements of one of the following groups:

            (i)    Eligible Participants who (I) are members of Local No. 480 of
            the Utility Workers Union of America, (II) are employed at the
            Mirant Canal, LLC facilities, (III) are hired or rehired by an
            Employing Company after August 11, 2001, (IV) meet the eligibility
            requirement Section 17.2(b) and (V) are Eligible Employees on the
            last day of the Plan Year;

            (ii)   Eligible Participants who (I) are members of Local No. 480 of
            the Utility Workers Union of America, (II) are employed at the
            Mirant Canal, LLC facilities, (III) elected on forms provided by an
            Employing Company on or before November 30, 2001 to participate in
            the "New Retirement Program," as that term is defined in Section
            (VIII)(E) of Schedule A to the Mirant Services Pension Plan for
            Bargaining Unit Employees, (IV) meet the eligibility requirement
            Section 17.2(b) and (V) are Eligible Employees on the last day of
            the Plan Year; or

            (iii)  Effective on and after January 1, 2005, Eligible Participants
            who (I) are members of Local No. 369 of the Utility Workers Union of
            America, (II) are hired

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            or rehired by an Employing Company after January 1, 1999, (III) meet
            the eligibility requirement Section 17.2(b) and (IV) are Eligible
            Employees on the last day of the Plan Year.

     A Participant's nonforfeitable percentage of Discretionary Profit Sharing
     Contributions (and earnings and losses thereon) (Section 10.2) shall be
     determined in accordance with the following schedule:

<Table>
<Caption>
                   Completed Years       Nonforfeitable         Forfeitable
                      of Service           Percentage           Percentage
                   ---------------       --------------         -----------
                     <S>                      <C>                   <C>
                     Less than 5                0%                  100%
                      5 or more               100%                    0%"
</Table>

                                       XX.

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


     IN WITNESS WHEREOF, the Committee, through a duly authorized officer of the
Company, has adopted this First Amendment to the Plan on this 24th day of March,
2004, to be effective as of the respective effective dates set forth above.


                                              MIRANT SERVICES, LLC


                                              By:     Dianne Davenport

                                              Title:  VP, Human Resources

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