Document:

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                                                                    EXHIBIT 4.16

                                                                  EXECUTION COPY

                       SOUTHERN ENERGY MID-ATLANTIC, LLC

                                 $1,224,000,000

                              PASS THROUGH TRUSTS

           Pass Through Certificates, Series A, Series B and Series C

                         REGISTRATION RIGHTS AGREEMENT
                         -----------------------------

                                                               December 18, 2000

CREDIT SUISSE FIRST BOSTON CORPORATION,
 as representative of the several Purchasers

c/o Credit Suisse First Boston Corporation,
Eleven Madison Avenue
New York, NY  10010-3629

Dear Sirs:

          Southern Energy Mid-Atlantic, LLC, a Delaware limited liability
company (the "Company") an indirect wholly-owned subsidiary of Southern Energy,
              -------
Inc., a Delaware corporation ("SEI"), proposes, subject to the terms and
conditions stated in a purchase agreement dated December 7, 2000 (the "Purchase
                                                                       --------
Agreement"), that State Street Bank and Trust Company of Connecticut, National
---------
Association, acting not in its individual capacity but solely as trustee (in its
capacity as such trustee, including its successors and assigns and any successor
trustee, the "Pass Through Trustee") under each of the Pass Through Trust
              --------------------
Agreements (the "Pass Through Trust Agreements") dated as of December 18, 2000
                 -----------------------------
between the Company and the Pass Through Trustee, will issue and sell to Credit
Suisse First Boston Corporation ("CSFB"), Banc of America Securities LLC ("B of
                                  ----                                     ----
A"), Chase Securities Inc. ("Chase"), and UBS Warburg LLC ("UBS" and, together
-                            -----                          ---
with CSFB, B of A and Chase, the several "Purchasers") 8.625% Pass Through
                                          ----------
Certificates, Series A in the aggregate amount of $454,000,000, 9.125% Pass
Through Certificates, Series B in the aggregate amount of $435,000,000, and
10.060% Pass Through Certificates, Series C in the aggregate amount of
$335,000,000 (such Pass Through Certificates are herein referred to as the
"Initial Securities").  Capitalized terms used herein but not defined herein
-------------------
shall have the respective meanings specified in the Purchase Agreement whether
expressly set forth therein or by reference to another agreement.  As an
inducement to the Purchasers to enter into the Purchase Agreement, the Company
agrees with the Purchasers, for the benefit of the Purchasers and the holders of
the Securities (as defined below) (collectively, the "Holders"), as follows:
                                                      -------

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          SECTION 1.  Exchange Offer.  Unless not permitted by applicable law
                      --------------
(after the Company has complied with the ultimate paragraph of this Section 1),
the Company shall prepare and file with the United States Securities and
Exchange Commission (the "Commission") a registration statement (the "Exchange
                          ----------                                  --------
Offer Registration Statement") on an appropriate form under the Securities Act
----------------------------
of 1933, as amended, and the rules and regulations of the Commission promulgated
thereunder (the "Securities Act"), with respect to a proposed offer (the
                 --------------
"Exchange Offer") to the holders of Transfer Restricted Securities (as defined
---------------
herein) who are not prohibited by any law or policy of the Commission from
participating in the Exchange Offer, to exchange a like aggregate principal
amount of pass-through certificates otherwise in all material respects identical
to the Initial Securities and registered under the Securities Act (the "Exchange
                                                                        --------
Securities").  The Company shall use its reasonable best efforts to (i) cause
----------
such Exchange Offer Registration Statement to become effective under the
Securities Act no later than the date 325 days after the date (the "Funding
                                                                    -------
Date") on which the Purchasers purchase the Initial Securities pursuant to the
----
Purchase Agreement (the "Effective Date") and (ii)  keep the Exchange Offer
                         --------------
Registration Statement effective for not less than 30 days (or longer, if
required by applicable law) after the date notice of the Exchange Offer is
mailed to the holders (such period being called the "Exchange Offer Registration
                                                     ---------------------------
Period").
------

          If the Company commences the Exchange Offer, the Company (i) will be
entitled to consummate the Exchange Offer 30 days after such commencement
(provided that the Company has accepted all the Initial Securities theretofore
validly tendered in accordance with the terms of the Exchange Offer) and (ii)
will be required to consummate the Exchange Offer no later than 40 days after
the date on which the Exchange Offer Registration Statement is declared
effective (such 40th day being the "Consummation Deadline").
                                    ---------------------

          Following the declaration of the effectiveness of the Exchange Offer
Registration Statement, the Company shall promptly commence the Exchange Offer,
it being the objective of such Exchange Offer to enable each Holder of Transfer
Restricted Securities electing to exchange the Initial Securities for Exchange
Securities (assuming that such Holder is not an affiliate of the Company within
the meaning of the Securities Act, acquires the Exchange Securities in the
ordinary course of such Holder's business and has no arrangements with any
person to participate in the distribution of the Exchange Securities and is not
prohibited by any law or policy of the Commission from participating in the
Exchange Offer) to trade such Exchange Securities from and after their receipt
without any limitations or restrictions under the Securities Act and without
material restrictions under the securities laws of the several states of the
United States.

          The Company and the Purchasers acknowledge that, pursuant to current
interpretations by the Commission's staff of Section 5 of the Securities Act, in
the absence of an applicable exemption therefrom, (i) each Holder which is a
broker-dealer electing to exchange Initial Securities, acquired for its own
account as a result of market making activities or other trading activities, for
Exchange Securities (an "Exchanging Dealer"), is required to deliver a
                         -----------------
prospectus containing the information set forth in (a)

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Annex A hereto on the cover, (b) Annex B hereto in the "Exchange Offer
Procedures" section and the "Purpose of the Exchange Offer" section, and (c)
Annex C hereto in the "Plan of Distribution" section of such prospectus in
connection with a sale of any such Exchange Securities received by such
Exchanging Dealer pursuant to the Exchange Offer and (ii) a Purchaser that
elects to sell Securities acquired in exchange for Initial Securities
constituting any portion of an unsold allotment, is required to deliver a
prospectus containing the information required by Items 507 or 508 of Regulation
S-K under the Securities Act, as applicable, in connection with such sale.

          The Company shall use its reasonable best efforts to keep the Exchange
Offer Registration Statement effective and to amend and supplement the
prospectus contained therein, in order to permit such prospectus to be delivered
by all persons subject to the prospectus delivery requirements of the Securities
Act for such period of time as such persons must comply with such requirements
in order to resell the Exchange Securities; provided, however, that (i) in the
                                            --------  -------
case where such prospectus and any amendment or supplement thereto must be
delivered by an Exchanging Dealer or a Purchaser, such period shall be the
lesser of 180 days and the date on which all Exchanging Dealers and the
Purchasers have sold all Exchange Securities held by them (unless such period is
extended pursuant to Section 3(j) below) and (ii) the Company shall make such
prospectus and any amendment or supplement thereto available to any broker-
dealer for use in connection with any resale of any Exchange Securities for a
period of not less than 180 days after the consummation of the Exchange Offer.

          If, upon consummation of the Exchange Offer, any Purchaser holds
Initial Securities acquired by it as part of its initial distribution, the
Company, simultaneously with the delivery of the Exchange Securities pursuant to
the Exchange Offer, shall cause the Pass Through Trustee to issue and deliver to
such Purchaser upon the written request of such Purchaser, in exchange (the
"Private Exchange") for the Initial Securities held by such Purchaser, a like
-----------------
principal amount of pass-through certificates issued under the Pass Through
Trust Agreements and in all material respects identical to the Initial
Securities (the "Private Exchange Securities").  The Initial Securities, the
                 ---------------------------
Exchange Securities and the Private Exchange Securities are herein collectively
called the "Securities".
            ----------

          In connection with the Exchange Offer, the Company shall:

          (a) mail to each Holder a copy of the prospectus forming part of the
Exchange Offer Registration Statement, together with an appropriate letter of
transmittal and related documents;

          (b) keep the Exchange Offer open for not less than 30 days (or longer,
if required by applicable law) after the date notice thereof is mailed to the
Holders;

          (c) utilize the services of a depositary for the Exchange Offer with
an address in the Borough of Manhattan, The City of New York, which may be the
Pass Through Trustee or an affiliate of the Pass Through Trustee;

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<PAGE>

          (d) permit Holders to withdraw tendered Transfer Restricted Securities
at any time prior to the close of business, New York time, on the last business
day on which the Exchange Offer shall remain open; and

          (e) otherwise comply with all applicable laws.

     As soon as practicable after the close of the Exchange Offer or the Private
Exchange, as the case may be, the Company shall:

          (x) accept for exchange all the Transfer Restricted Securities validly
tendered and not withdrawn pursuant to the Exchange Offer in accordance with the
Exchange Offer Registration Statement and the letter of transmittal which shall
be an exhibit thereto and the Private Exchange;

          (y) deliver to the Pass Through Trustee for cancellation all the
Initial Securities so accepted for exchange; and

          (z) cause the Pass Through Trustee to issue, authenticate and deliver
promptly to each Holder of the Initial Securities, Exchange Securities or
Private Exchange Securities, as the case may be, equal in principal amount to
the Initial Securities of such Holder so accepted for exchange.

          The Exchange Securities will not be subject to the transfer
restrictions, and the Pass Through Trust Agreements shall provide that all the
Securities will vote and consent together on all matters as one class and none
of the Securities will have the right to vote or consent as a class separate
from one another on any matter.

          Interest on each Exchange Security and Private Exchange Security
issued pursuant to the Exchange Offer and in the Private Exchange will accrue
from the last interest payment date on which interest was paid on the Initial
Securities surrendered in exchange therefor or, if no interest has been paid on
the Initial Securities, from the date of original issue of the Initial
Securities.

          Each Holder participating in the Exchange Offer shall be required to
represent to the Company that at the time of the consummation of the Exchange
Offer (i) any Exchange Securities received by such Holder will be acquired in
the ordinary course of business, (ii) such Holder will have no arrangements or
understanding with any person to participate in the distribution of the
Securities or the Exchange Securities within the meaning of the Securities Act,
(iii) such Holder is not an "affiliate," as defined in Rule 405 of the
Securities Act, of the Company or if it is an affiliate, such Holder will comply
with the registration and prospectus delivery requirements of the Securities Act
to the extent applicable, (iv) if such Holder is not a broker-dealer, that it is
not engaged in, and does not intend to engage in, the distribution of the
Exchange Securities and (v) if such Holder is a broker-dealer, that it will
receive Exchange Securities for its own account in exchange for Initial
Securities that were acquired as a result of market-making

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activities or other trading activities and that it will be required to
acknowledge that it will deliver a prospectus in connection with any resale of
such Exchange Securities.

          Notwithstanding any other provisions hereof, the Company will ensure
that (i) any Exchange Offer Registration Statement and any amendment thereto and
any prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations
thereunder, (ii) any Exchange Offer Registration Statement and any amendment
thereto does not, when it becomes effective, contain an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading and (iii) any prospectus
forming part of any Exchange Offer Registration Statement, and any supplement to
such prospectus, does not include an untrue statement of a material fact or omit
to state a material fact required to be stated therein or necessary in order to
make the statements therein, in the light of the circumstances under which they
were made, not misleading.

          If following the date hereof there has been announced a change in
Commission policy with respect to exchange offers that in the reasonable opinion
of counsel to the Company raises a substantial question as to whether the
Exchange Offer is permitted by applicable federal law, the Company will use its
reasonable best efforts to seek a no-action letter or other favorable decision
from the Commission allowing the Company to consummate the Exchange Offer.

          SECTION 2.  Shelf Registration.  If, (i) because of any change in law
                      ------------------
or in applicable interpretations thereof by the staff of the Commission, the
Company is not permitted to effect an Exchange Offer, as contemplated by Section
1 hereof, (ii) the Exchange Offer is not consummated by the 365th day after the
Funding Date (the "Registration Deadline"), (iii) any Purchaser so requests with
                   ---------------------
respect to the Initial Securities (or the Private Exchange Securities) not
eligible to be exchanged for Exchange Securities in the Exchange Offer and held
by it following consummation of the Exchange Offer or (iv) any Holder (other
than an Exchanging Dealer) is not eligible to participate in the Exchange Offer
or, in the case of any Holder (other than an Exchanging Dealer) that
participates in the Exchange Offer, such Holder does not receive freely
tradeable Exchange Securities on the date of the exchange and any such Holder so
requests, the Company shall take the following actions (the date on which any of
the conditions described in the foregoing clauses (i) through (iv) occur,
including in the case of clauses (iii) or (iv) the receipt of the required
notice, being a "Trigger Date"):
                 ------------

          (a) The Company shall promptly (but in no event more than 45 days
after the Trigger Date (such 45th day being a "Shelf Filing Deadline"), file
                                               ---------------------
with the Commission and thereafter use its reasonable best efforts to cause to
be declared effective no later than 140 days after the Trigger Date, a
registration statement (the "Shelf Registration Statement" and, together with
                             ----------------------------
the Exchange Offer Registration Statement, a "Registration Statement") on an
                                              ----------------------
appropriate form under the Securities Act relating to the offer and sale of the
Transfer Restricted Securities by the Holders thereof from time to time in
accordance with the methods of distribution set forth in the Shelf Registration

                                       5
<PAGE>

Statement and Rule 415 under the Securities Act (hereinafter, the "Shelf
                                                                   -----
Registration"); provided, however, that no Holder (other than a Purchaser) shall
------------    --------  -------
be entitled to have the Securities held by it covered by such Shelf Registration
Statement unless such Holder agrees in writing to be bound by all the provisions
of this Agreement applicable to such Holder.

          (b) The Company shall use its reasonable best efforts to keep the
Shelf Registration Statement continuously effective in order to permit the
prospectus included therein to be lawfully delivered by the Holders of the
relevant Securities, for a period (the "Shelf Registration Period") ending on
the earlier of (A) two years (or such longer period if extended pursuant to
Section 3(j) below) from the date of its effectiveness and (B) the date on which
all the Securities covered by the Shelf Registration Statement (i) have been
sold pursuant thereto or (ii) are no longer restricted securities (as defined in
Rule 144 under the Securities Act, or any successor rule thereof ("Rule 144")).
                                                                   --------
Except during a Suspension Period (as defined herein), the Company shall be
deemed not to have used its reasonable best efforts to keep the Shelf
Registration Statement effective during the requisite period if it voluntarily
takes any action that would result in Holders of Securities covered thereby not
being able to offer and sell such Securities during that period, unless such
action is required by applicable law.

          (c) Notwithstanding any other provisions of this Agreement to the
contrary, the Company shall cause the Shelf Registration Statement and the
related prospectus and any amendment or supplement thereto, as of the effective
date of the Shelf Registration Statement, amendment or supplement, (i) to comply
in all material respects with the applicable requirements of the Securities Act
and the rules and regulations of the Commission and (ii) not to contain any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary in order to make the statements therein, in light
of the circumstances under which they were made, not misleading, except during a
Suspension Period; provided that clauses (i) and (ii) shall not apply to any
                   --------
untrue statement or omission made in reliance upon and in conformity with
written information furnished to the Company by the Purchasers or Holders
expressly for use therein.

          SECTION 3.  Registration Procedures.  In connection with any Shelf
                      -----------------------
Registration contemplated by Section 2 hereof and, to the extent applicable, any
Exchange Offer contemplated by Section 1 hereof, the following provisions shall
apply:

          (a) The Company shall (i) furnish to each Purchaser, prior to the
filing thereof with the Commission, a copy of the Registration Statement and
each amendment thereof and each supplement, if any, to the prospectus included
therein and, in the event that a Purchaser (with respect to any portion of an
unsold allotment from the original offering) is participating in the Exchange
Offer or the Shelf Registration Statement, the Company shall use its reasonable
best efforts to reflect in each such document, when so filed with the
Commission, such comments as such Purchaser reasonably may propose; (ii) include
the information set forth in Annex A hereto on the cover, in Annex B hereto in
the "Exchange Offer Procedures" section and the "Purpose of the Exchange Offer"
section and in Annex C hereto in the "Plan of Distribution" section of the
prospectus

                                       6
<PAGE>

forming a part of the Exchange Offer Registration Statement and include the
information set forth in Annex D hereto in the Letter of Transmittal delivered
pursuant to the Exchange Offer; (iii) if requested by a Purchaser, include the
information required by Items 507 or 508 of Regulation S-K under the Securities
Act, as applicable, in the prospectus forming a part of the Exchange Offer
Registration Statement; (iv) include within the prospectus contained in the
Exchange Offer Registration Statement a section entitled "Plan of Distribution,"
which, in the reasonable judgment of the Purchasers based upon advise of counsel
(which may be in-house counsel), contains all information required under
applicable securities laws, including, without limitation, a summary statement
of the positions taken or policies made by the staff of the Commission with
respect to the potential "underwriter" status of any broker-dealer that is the
beneficial owner (as defined in Rule 13d-3 under the Securities Exchange Act of
1934, as amended, and the rules and regulations of the Commission promulgated
thereunder (the "Exchange Act")) of Exchange Securities received by such broker-
                 ------------
dealer in the Exchange Offer (a "Participating Broker-Dealer"); and (v) in the
                                 ---------------------------
case of a Shelf Registration Statement include the names of the Holders who
propose to sell Securities pursuant to the Shelf Registration Statement as
selling securityholders.

          (b)  The Company shall give written notice to the Purchasers, the
Holders of the Securities and any Participating Broker-Dealer from whom the
Company has received prior written notice that it will be a Participating
Broker-Dealer in the Exchange Offer (which notice pursuant to clauses (ii)-(v)
hereof shall be accompanied by an instruction to suspend the use of the
prospectus until the requisite changes have been made):

               (i)   when the Registration Statement or any amendment thereto
          has been filed with the Commission and when the Registration Statement
          or any post-effective amendment thereto has become effective;

               (ii)  of any request by the Commission for amendments or
          supplements to the Registration Statement or the prospectus included
          therein or for additional information;

               (iii) of the issuance by the Commission of any stop order
          suspending the effectiveness of the Registration Statement or the
          initiation of any proceedings for that purpose;

               (iv)  of the receipt by the Company or its legal counsel of any
          notification with respect to the suspension of the qualification of
          the Securities for sale in any jurisdiction or the initiation or
          threatening of any proceeding for such purpose; and

               (v) of the happening of any event that requires the Company to
          make changes in the Registration Statement or the prospectus in order
          that the Registration Statement or the prospectus do not contain an
          untrue statement of a material fact nor omit to state a material fact
          required to be

                                       7
<PAGE>

          stated therein or necessary to make the statements therein (in the
          case of the prospectus, in light of the circumstances under which they
          were made) not misleading.

          (c) The Company shall make every reasonable effort to obtain the
withdrawal at the earliest possible time, of any order suspending the
effectiveness of the Registration Statement.

          (d) If any Holder of Securities included within the coverage of the
Shelf Registration shall so request in writing, the Company shall furnish to
each such Holder, without charge, at least one conformed copy of the Shelf
Registration Statement and any post-effective amendment thereto, including
financial statements and schedules, and, if the Holder so reasonably requests in
writing, all exhibits thereto (including those, if any, incorporated by
reference).

          (e) The Company shall deliver to each Exchanging Dealer and each
Purchaser, and to any other Holder who so requests in writing, without charge,
at least one copy of the Exchange Offer Registration Statement and any post-
effective amendment thereto, including financial statements and schedules, and,
if any Purchaser or any such Holder reasonably requests in writing, all exhibits
thereto (including those incorporated by reference).

          (f) The Company shall, during the Shelf Registration Period (except
during a Suspension Period), deliver to each Holder of Securities included
within the coverage of the Shelf Registration, without charge, as many copies of
the prospectus (including each preliminary prospectus) included in the Shelf
Registration Statement and any amendment or supplement thereto as such person
may reasonably request.  The Company consents, subject to the provisions of this
Agreement, to the use of the prospectus forming a part of the Shelf Registration
Statement or any amendment or supplement thereto by each of the selling Holders
of the Securities in connection with the offering and sale of the Securities
covered by the prospectus, or any amendment or supplement thereto, included in
the Shelf Registration Statement.

          (g) The Company shall deliver to each Purchaser, any Exchanging
Dealer, any Participating Broker-Dealer and such other persons required to
deliver a prospectus following the Exchange Offer, without charge, as many
copies of the final prospectus included in the Exchange Offer Registration
Statement and any amendment or supplement thereto as such persons may reasonably
request.  The Company consents, subject to the provisions of this Agreement, to
the use of the prospectus forming a part of the Exchange Offer Registration
Statement or any amendment or supplement thereto by any Purchaser, if necessary,
any Participating Broker-Dealer and such other persons required to deliver a
prospectus following the Exchange Offer in connection with the offering and sale
of the Exchange Securities covered by the prospectus, or any amendment or
supplement thereto, included in such Exchange Offer Registration Statement,
except during a Suspension Period.

                                       8
<PAGE>

          (h) Prior to any public offering of the Securities pursuant to any
Registration Statement the Company shall use its reasonable best efforts to
register or qualify or cooperate with the Holders of the Securities included
therein and their respective counsel in connection with the registration or
qualification of the Securities for offer and sale under the securities or "blue
sky" laws of such states of the United States as any Holder of the Securities
reasonably requests in writing and do any and all other acts or things necessary
or advisable to enable the offer and sale in such jurisdictions of the
Securities covered by such Registration Statement; provided, however, that the
                                                   --------  -------
Company shall not be required to (i) qualify generally to do business in any
jurisdiction where it is not then so qualified or (ii) take any action which
would subject it to general service of process or to taxation in any
jurisdiction where it is not then so subject.

          (i) The Company shall cooperate with the Holders of the Securities to
facilitate the timely preparation and delivery of certificates representing the
Securities to be sold pursuant to any Registration Statement free of any
restrictive legends and in such denominations and registered in such names as
the Holders may request a reasonable period of time prior to sales of the
Securities pursuant to such Registration Statement.

          (j) Upon the occurrence of any event contemplated by paragraphs (ii)
through (v) of Section 3(b) above during the period for which the Company is
required to maintain an effective Registration Statement, the Company shall
promptly prepare and file a post-effective amendment to the Registration
Statement or a supplement to the related prospectus and any other required
document so that, as thereafter delivered to Holders of the Securities or
purchasers of Securities, the prospectus will not contain an untrue statement of
a material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading.  If the Company notifies the Purchasers,
the Holders of the Securities and any known Participating Broker-Dealer in
accordance with paragraphs (ii) through (v) of Section 3(b) above to suspend the
use of the prospectus (and any exchange or sales) until the requisite changes to
the prospectus have been made, then the Purchasers, the Holders of the
Securities and any such Participating Broker-Dealers shall suspend use of such
prospectus (and any exchange or sales) until receipt of the amendment,
supplement or other document contemplated hereunder, and the period of
effectiveness of the Shelf Registration Statement provided for in Section 2(b)
above and the Exchange Offer Registration Statement provided for in Section 1
above shall each be extended by the number of days from and including the date
of the giving of such notice to and including the date when the Purchasers, the
Holders of the Securities and any known Participating Broker-Dealer shall have
received such amended or supplemented prospectus pursuant to this Section 3(j).

          (k) Not later than the effective date of the applicable Registration
Statement, the Company will provide a CUSIP number for the Initial Securities,
the Exchange Securities or the Private Exchange Securities, as the case may be,
and provide the applicable trustee with printed certificates for the Initial
Securities, the Exchange

                                       9
<PAGE>

Securities or the Private Exchange Securities, as the case may be, in a
form eligible for deposit with The Depository Trust Company.

          (l) The Company will comply with all rules and regulations of the
Commission to the extent and so long as they are applicable to the Exchange
Offer or the Shelf Registration and will make generally available to its
security holders (or otherwise provide in accordance with Section 11(a) of the
Securities Act) an earnings statement satisfying the provisions of Section 11(a)
of the Securities Act, no later than 45 days after the end of a 12-month period
(or 90 days, if such period is a fiscal year) beginning with the first month of
the Company's first fiscal quarter commencing after the effective date of the
Registration Statement, which statement shall cover such 12-month period.

          (m) The Company shall cause the Pass Through Trust Agreements to be
qualified under the Trust Indenture Act of 1939, as amended, and the rules and
regulations of the Commission promulgated thereunder (the "TIA") in a timely
                                                           ---
manner, and in no event later than the effective date of the applicable
Registration Statement, as required by applicable law.

          (n) The Company may require each Holder of Securities to be registered
pursuant to the Shelf Registration Statement to furnish to the Company such
information regarding the Holder and the distribution of the Securities as the
Company may from time to time reasonably require for inclusion in the Shelf
Registration Statement, and the Company may exclude from such registration the
Securities of any Holder that unreasonably fails to furnish such information
within a reasonable time after receiving such request.

          (o) The Company shall enter into such customary agreements (including,
if requested, an underwriting agreement in form consistent with the Purchase
Agreement) and take all such other customary and appropriate action, if any, as
any Holder of the Securities shall reasonably request in order to facilitate the
disposition of the Securities pursuant to any Shelf Registration.

          (p) In the case of any Shelf Registration, the Company shall (i) make
reasonably available for inspection by the Holders of the Securities, any
underwriter participating in any disposition pursuant to the Shelf Registration
Statement and any attorney, accountant or other agent retained by the Holders of
the Securities or any such underwriter all relevant financial and other records,
pertinent corporate documents and properties of the Company and (ii) use its
reasonable efforts to cause the Company's officers, directors, employees,
accountants and counsel to supply all relevant information reasonably requested
by the Holders of the Securities or any such underwriter, attorney, accountant
or agent in connection with the Shelf Registration Statement, in each case, as
shall be reasonably necessary to enable such persons, to conduct a reasonable
investigation within the meaning of Section 11 of the Securities Act; provided,
                                                                      --------
however, that such persons shall first agree in writing with the Company that,
-------
for a period of one year from the receipt of such information, any information
that is reasonably and in good faith designated by the Company in writing as
confidential at the time of delivery of such

                                       10
<PAGE>

information shall be kept confidential by such persons, unless (i) disclosure of
such information is required by court or administrative order or is necessary to
respond to inquiries by regulatory authorities, (ii) disclosure of such
information is required by law (including any disclosure requirements pursuant
to federal securities laws in connection with the filing of the Shelf
Registration or the use of any prospectus), (iii) such information becomes
available to such persons from a source other than the Company and its
subsidiaries and such source is not known by such persons to be bound by a
confidentiality agreement; provided, further, that the foregoing inspection and
                           --------  -------
information gathering shall be coordinated on behalf of the Purchasers by you
and on behalf of the other parties, by one counsel designated by and on behalf
of such other parties as described in Section 4 hereof, provided, however, that
                                                        --------  -------
such counsel shall be Shearman & Sterling, or such other counsel as is
reasonably acceptable to the Company (the "Special Counsel").
                                           ---------------

          (q) In the case of any Shelf Registration, the Company, if requested
by the Holders of at least 5% of the aggregate principal amount of the
outstanding Securities, shall (or in the case of an underwritten offering, shall
use its best efforts to) cause (i) its counsel to deliver an opinion and updates
thereof relating to the Securities in customary form addressed to such Holders
and the managing underwriters, if any, thereof; (ii) its officers to execute and
deliver all customary documents and certificates and updates thereof reasonably
requested by any underwriters of the applicable Securities; and (iii) its
independent public accountants and the independent public accountants with
respect to any other entity for which financial information is provided in the
Shelf Registration Statement to provide to the selling Holders of the applicable
Securities and any underwriter therefor a comfort letter in customary form and
covering matters of the type customarily covered in comfort letters in
connection with primary underwritten offerings, subject to receipt of
appropriate documentation as contemplated, and only if permitted, by Statement
of Auditing Standards No. 72.

          (r) If an Exchange Offer or a Private Exchange is to be consummated,
upon delivery of the Initial Securities by Holders to the Company (or to such
other Person as directed by the Company) in exchange for the Exchange Securities
or the Private Exchange Securities, as the case may be, the Company shall mark,
or caused to be marked, on the Initial Securities so exchanged that such Initial
Securities are being canceled in exchange for the Exchange Securities or the
Private Exchange Securities, as the case may be; in no event shall the Initial
Securities be marked as paid or otherwise satisfied.

          (s) The Company will use its reasonable best efforts to (a) if the
Initial Securities have been rated prior to the initial sale of such Initial
Securities, confirm such ratings will apply to the Securities covered by a
Registration Statement, or (b) if the Initial Securities were not previously
rated, cause the Securities covered by a Registration Statement to be rated with
the appropriate rating agencies, if so requested by Holders of a majority in
aggregate principal amount of Securities covered by such Registration Statement,
or by the managing underwriters, if any.

                                       11
<PAGE>

          (t) In the event that any broker-dealer registered under the Exchange
Act shall underwrite any Securities or participate as a member of an
underwriting syndicate or selling group or "assist in the distribution" (within
the meaning of the Conduct Rules (the "Rules") of the National Association of
                                       -----
Securities Dealers, Inc. ("NASD")) thereof, whether as a Holder of such
                           ----
Securities or as an underwriter, a placement or sales agent or a broker or
dealer in respect thereof, or otherwise, the Company will assist such broker-
dealer in complying with the requirements of such Rules, including, without
limitation, by (i) if such Rules, including Rule 2720, shall so require,
engaging a "qualified independent underwriter" (as defined in Rule 2720) to
participate in the preparation of the Registration Statement relating to such
Securities, to exercise usual standards of due diligence in respect thereto and,
if any portion of the offering contemplated by such Registration Statement is an
underwritten offering or is made through a placement or sales agent, to
recommend the yield of such Securities, (ii) indemnifying any such qualified
independent underwriter to the extent of the indemnification of underwriters
provided in Section 5 hereof and (iii) providing such information to such
broker-dealer as may be required in order for such broker-dealer to comply with
the requirements of the Rules.

          (u) The Company shall use its reasonable best efforts to take all
other steps necessary to effect the registration of the Securities covered by a
Registration Statement contemplated hereby.

          SECTION 4. Registration Expenses. All expenses incident to the
                     ---------------------
Company's performance of and compliance with this Agreement will be borne by the
Company, regardless of whether a Registration Statement is ever filed or becomes
effective, including without limitation;

               (i)   all registration and filing fees and expenses;

               (ii)  all fees and expenses of compliance with federal securities
          and state "blue sky" or securities laws;

               (iii) all expenses of printing (including printing certificates
          for the Securities to be issued in the Exchange Offer and the Private
          Exchange and printing of Prospectuses), messenger and delivery
          services and telephone;

               (iv)  all fees and disbursements of counsels for the Company and
          the Pass Through Trustee;

               (v)   all application and filing fees in connection with listing
          the Exchange Securities on a national securities exchange or automated
          quotation system pursuant to the requirements hereof; and

                                       12
<PAGE>

               (vi) all fees and disbursements of independent certified public
          accountants of the Company (including the expenses of any special
          audit and comfort letters required by or incident to such
          performance).

The Company will bear its internal expenses (including, without limitation, all
salaries and expenses of its officers and employees performing legal or
accounting duties), the expenses of any annual audit and the fees and expenses
of any person, including special experts, retained by the Company.

          (a) In connection with any Registration Statement required by this
Agreement, the Company will reimburse the Purchasers and the holders of Transfer
Restricted Securities who are tendering Initial Securities in the Exchange Offer
and/or selling or reselling Securities pursuant to the "Plan of Distribution"
contained in the Exchange Offer Registration Statement or the Shelf Registration
Statement, as applicable, for the reasonable fees and disbursements, not to
exceed $25,000 in the aggregate, of not more than one counsel, chosen by the
holders of a majority in principal amount of the Securities for whose benefit
such Registration Statement is being prepared; provided, however, that such
                                               --------  -------
counsel shall be the Special Counsel.  Each Holder shall pay all underwriting
discounts, commissions and transfer taxes, if any, relating to the sale or
disposition of such Holder's Securities pursuant to the Shelf Registration.

          SECTION 5. Indemnification. The Company agrees to indemnify and hold
                     ---------------
harmless each Holder of the Securities, any Participating Broker-Dealer and each
person, if any, who controls each Holder or such Participating Broker-Dealer
within the meaning of the Securities Act (each Holder, any Participating Broker-
Dealer and such controlling persons are referred to collectively as the
"Indemnified Parties") against any and all losses, claims, damages or
 -------------------
liabilities, joint or several, to which they or any of them may become subject
under the Securities Act or otherwise, and to reimburse the Indemnified Parties
for any legal or other expenses incurred by them in connection with
investigating or defending any actions, insofar as such losses, claims, damages,
liabilities or actions arise out of or are based upon any untrue statement or
alleged untrue statement of a material fact contained in a Registration
Statement or prospectus or in any amendment or supplement thereto or in any
preliminary prospectus relating to a Shelf Registration, or arise out of or are
based upon any omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances under which they were made, not misleading, except
insofar as such losses, claims, damages, liabilities or actions arise out of or
are based upon any such untrue statement or omission or alleged untrue statement
or omission which was made in a Registration Statement or prospectus or in any
amendment or supplement thereto or in any preliminary prospectus relating to a
Shelf Registration in reliance upon and in conformity with information furnished
in writing to the Company by, or through such Indemnified Party or on behalf of
such Indemnified Party for use therein and except that this indemnity shall not
inure to the benefit of any Holder or Participating Broker-Dealer from whom the
person asserting any such losses, claims, damages or liabilities purchased the
Securities concerned, to the
                                       13
<PAGE>

extent that a prospectus or supplement to such prospectus relating to such
Securities was required to be delivered by such Holder or Participating Broker-
Dealer under the Securities Act in connection with such purchase and any such
loss, claim, damage or liability of such Holder or Participating Broker-Dealer
results from the fact that there was not sent or given to such person, at or
prior to the written confirmation of the sale of such Securities to such person,
a copy of the final prospectus or supplement to such prospectus if the Company
had previously furnished copies thereof to such Holder or Participating Broker-
Dealer.

          (a) Each Holder of the Securities, severally and not jointly, will
indemnify and hold harmless the Company and each person, if any, who controls
the Company within the meaning of the Securities Act or the Exchange Act from
and against any losses, claims, damages or liabilities or any actions in respect
thereof, to which the Company or any such controlling person may become subject
under the Securities Act, the Exchange Act or otherwise, insofar as such losses,
claims, damages, liabilities or actions arise out of or are based upon any
untrue statement or alleged untrue statement of a material fact contained in a
Registration Statement or prospectus or in any amendment or supplement thereto
or in any preliminary prospectus relating to a Shelf Registration, or arise out
of or are based upon the omission or alleged omission to state therein a
material fact necessary to make the statements therein not misleading, but in
each case only to the extent that the untrue statement or omission or alleged
untrue statement or omission was made in reliance upon and in conformity with
written information pertaining to such Holder and furnished to the Company by or
on behalf of such Holder specifically for inclusion therein; and, subject to the
limitation set forth immediately preceding this clause, shall reimburse, as
incurred, the Company for any legal or other expenses reasonably incurred by the
Company or any such controlling person in connection with investigating or
defending any loss, claim, damage, liability or action in respect thereof.

          (b) Promptly after receipt by a party indemnified under Section 5(a)
or Section 5(b) above of written notice of any loss, claim, damage or liability
in respect of which indemnity may be sought by it hereunder, such indemnified
party will, if a claim is to be made against an indemnifying party, notify the
indemnifying party thereof in writing, but the omission so to notify the
indemnifying party will not relieve the indemnifying party from any liability
(otherwise than under Section 5(a) or Section 5(b) hereof) which it may have to
the indemnified party.  Thereafter, the indemnified party and the indemnifying
party shall consult, to the extent appropriate, with a view to minimizing the
cost to the indemnifying party of its obligations hereunder.  In case any
indemnified party receives written notice of any loss, claim, damage or
liability in respect of which indemnity may be sought by it hereunder and it
notifies the indemnifying party thereof, the indemnifying party will be entitled
to participate therein, and to the extent that it may elect by written notice
delivered to the indemnified party promptly after receiving the aforesaid notice
from the indemnified party, to assume the defense thereof with counsel
reasonably satisfactory to the indemnified party; provided, however, that if the
                                                  --------  -------
parties against which any loss, claim, damage or liability arises include both
the indemnified party and the indemnifying party and the indemnified party shall
have reasonably concluded that defenses available to it create a conflict of
interest for the counsel selected

                                       14
<PAGE>

by the indemnifying party under the code of professional responsibility
applicable to such counsel, the indemnified party shall have the right to select
one separate counsel to assume such legal defenses and otherwise to participate
in the defenses of such loss, claim, damage or liability on behalf of the
indemnified party. Upon receipt by the indemnified party of notice from the
indemnifying party of its selection so to assume the defense of such loss,
claim, damage or liability and approval by the indemnified party of counsel, the
indemnifying party shall not be liable to the indemnified party under Section
5(a) or Section 5(b) hereof for any legal or other expenses subsequently
incurred by the indemnified party in connection with the defense thereof unless
(i) the indemnified party shall have employed such counsel in connection with
the assumption of legal defenses in accordance with the proviso to the next
preceding sentence, (ii) the indemnifying party shall not have employed and
continued to employ counsel reasonably satisfactory to the indemnified party to
represent the indemnified party within a reasonable time after notice of
commencement of the action or (iii) the indemnifying party shall have authorized
in writing the employment of separate counsel for the indemnified party at the
expense of the indemnifying party. No indemnifying party shall, without prior
written consent of the indemnified party, effect any settlement of any pending
or threatened action in respect of which the indemnified party is or is entitled
or subject to be a party and the indemnified party is entitled to indemnity
hereunder unless such settlement includes an unconditional release of the
indemnified party from all liability on any claims that are the subject matter
of such action and does not include a statement as to or an admission of fault,
culpability or a failure to act by or on behalf of any indemnified party. No
indemnifying party shall be liable for any settlement, compromise or consent to
the entry of any order adjudicating or otherwise disposing of any loss, claim,
damage or liability effected without its consent.

          (c) The agreements contained in this Section 5 shall survive the sale
of the Securities pursuant to a Registration Statement and shall remain in full
force and effect, regardless of any termination or cancellation of this
Agreement (including, without limitation, pursuant to Section 9(l) hereto) or
any investigation made by or on behalf of any indemnified party.

          SECTION 6.  Additional Interest Under Certain Circumstances.  (a)
                      -----------------------------------------------
Additional interest (the "Additional Interest") with respect to the Securities
                          -------------------
shall be assessed as follows if any of the following events occur (each such
event in clauses (i) through (ii) below being herein called a "Registration
                                                               ------------
Default"):
-------

               (i)  (A) the Exchange Offer has not been consummated on or prior
          to the Registration Deadline and (B) the Shelf Registration Statement
          required by this Agreement is not declared effective by the Commission
          on or prior to the Registration Deadline; or

               (ii) the Shelf Registration Statement required by this Agreement
          has been declared effective by the Commission but (A) such Shelf
          Registration Statement thereafter ceases to be effective at any time
          that the Company is obligated hereby to maintain the effectiveness
          thereof or (B) such Shelf Registration Statement or the related
          prospectus ceases

                                       15
<PAGE>

          to be usable in connection with resales of Transfer Restricted
          Securities during the periods specified herein because either (1) any
          event occurs as a result of which the related prospectus forming part
          of such Shelf Registration Statement would include any untrue
          statement of a material fact or omit to state any material fact
          necessary to make the statements therein in the light of the
          circumstances under which they were made not misleading, or (2) it
          shall be necessary to amend such Shelf Registration Statement or
          supplement the related prospectus, to comply with the Securities Act
          or the Exchange Act or the respective rules thereunder.

          Additional Interest shall accrue on the Securities over and above the
interest set forth in the title of the Securities from and including the date on
which any such Registration Default shall occur to but excluding the date on
which all such Registration Defaults have been cured, at a rate of 0.50% per
annum (the "Additional Interest Rate"), which Additional Interest Rate shall be
            ------------------------
the same regardless of whether one or more such Registration Defaults shall be
continuing simultaneously.  Following the cure of all Registration Defaults, the
accrual of Additional Interest will cease and the interest rate on the
Securities will be reduced to the interest rate it would have been had no such
Registration Default occurred.

          (b) A Registration Default referred to in Section 6(a)(ii) hereof
shall be deemed not to have occurred and be continuing in relation to a Shelf
Registration Statement or the related prospectus if such Registration Default
has occurred solely as a result of (i) the filing of a post-effective amendment
to such Shelf Registration Statement to incorporate annual audited financial
information with respect to the Company where such post-effective amendment is
not yet effective and needs to be declared effective to permit Holders to use
the related prospectus or (ii) the occurrence of other material events or
developments with respect to the Company that would need to be described in such
Shelf Registration Statement or the related prospectus, provided that, during
                                                        --------
the Suspension Period, the Company is proceeding promptly and in good faith to
amend or supplement such Shelf Registration Statement and related prospectus to
describe such events.  For purposes hereof, the "Suspension Period" shall mean
                                                 -----------------
the period of time commencing on and including the date that the Company gives
notice that the Shelf Registration Statement is no longer effective or the
prospectus included therein is no longer usable as a result of the occurrence of
such events or developments, and ending on the earliest to occur of (x) the date
on which each seller of Securities covered by the Shelf Registration Statement
either receives copies of the supplemented or amended prospectus contemplated
herein or is advised in writing by the Company that the use of the prospectus
may be resumed, (y) the expiration of 45 consecutive calendar days during which
such Suspension Period has been in effect, and (z) the expiration of an
aggregate of 60 days in any consecutive twelve-month period during which one or
more Suspension Periods has been in effect.  Additional Interest shall be
payable in accordance with the above paragraph from and excluding the last day
of a Suspension Period until such Registration Default is cured.

                                       16
<PAGE>

          (c) Any amounts of Additional Interest due pursuant to Section 6(a)
will be payable in cash on the regular interest payment dates with respect to
the Securities. The amount of Additional Interest will be determined by
multiplying the applicable Additional Interest Rate by the principal amount of
the Securities and further multiplied by a fraction, the numerator of which is
the number of days such Additional Interest Rate was applicable during such
period (determined on the basis of a 360-day year comprised of twelve 30-day
months), and the denominator of which is 360.

          (d) "Transfer Restricted Securities" means each Security until (i) the
               ------------------------------
date on which such Security has been exchanged by a person other than a broker-
dealer for a freely transferable Exchange Security in the Registered Exchange
Offer, (ii) following the exchange by a broker-dealer in the Registered Exchange
Offer of an Initial Security for an Exchange Note, the date on which such
Exchange Note is sold to a purchaser who receives from such broker-dealer on or
prior to the date of such sale a copy of the prospectus contained in the
Exchange Offer Registration Statement, (iii) the date on which such Security has
been effectively registered under the Securities Act and disposed of in
accordance with the Shelf Registration Statement or (iv) the date on which such
Security is distributed to the public pursuant to Rule 144 under the Securities
Act or is saleable pursuant to Rule 144(k) under the Securities Act.

          (e) The parties hereto agree that the additional interest provided for
in this Section 6 constitutes a reasonable estimate of and is intended to
constitute the sole remedy to Holders of Securities by reason of the failure of
the Shelf Registration Statement or the Exchange Offer Registration Statement to
be declared effective and the Registered Exchange Offer to be consummated, in
each case to the extent required by this Agreement.

          SECTION 7.  Rules 144 and 144A.  The Company shall use its reasonable
                      ------------------
best efforts to file the reports required to be filed by it under the Securities
Act and the Exchange Act in a timely manner and, if at any time the Company is
not required to file such reports, it will, upon the request of any Holder of
Securities, make publicly available other information so long as necessary to
permit sales of their securities pursuant to Rules 144 and 144A.  The Company
covenants that it will take such further action as any Holder of Securities may
reasonably request, all to the extent required from time to time to enable such
Holder to sell Securities without registration under the Securities Act within
the limitation of the exemptions provided by Rules 144 and 144A (including the
requirements of Rule 144A(d)(4)).  The Company will provide a copy of this
Agreement to prospective purchasers of Initial Securities identified to the
Company by the Initial Purchasers upon request.  Upon the request of any Holder
of Initial Securities, the Company shall deliver to such Holder a written
statement as to whether it has complied with such requirements.  Notwithstanding
the foregoing, nothing in this Section 7 shall be deemed to require the Company
to register any of its securities pursuant to the Exchange Act.

          SECTION 8.  Underwritten Registrations.  If any of the Transfer
                      --------------------------
Restricted Securities covered by any Shelf Registration are to be sold in an
Underwritten

                                       17
<PAGE>

Offering, the investment banker or investment bankers and manager or managers
that will administer the offering ("Managing Underwriters") will be selected by
                                    ---------------------
the Holders of a majority in aggregate principal amount of such Transfer
Restricted Securities to be included in such offering, subject to the consent of
the Company (which shall not be unreasonably withheld or delayed), and such
Holders shall be responsible for all underwriting commissions and discounts in
connection therewith.

          No person may participate in any underwritten registration hereunder
unless such person (i) agrees to sell such person's Transfer Restricted
Securities on the basis reasonably provided in any underwriting arrangements
approved by the persons entitled hereunder to approve such arrangements and (ii)
completes and executes all questionnaires, powers of attorney, indemnities,
underwriting agreements and other documents reasonably required under the terms
of such underwriting arrangements.

          SECTION 9.  Miscellaneous.  (a)  No Inconsistent Agreements.  The
                      -------------        --------------------------
Company will not on or after the date of this Agreement enter into any agreement
with respect to its securities that is inconsistent with the rights granted to
the Holders in this Agreement or otherwise conflicts with the provisions hereof.
The rights granted to the Holders hereunder do not in any way conflict with and
are not inconsistent with the rights granted to the holders of the Company's
securities under any agreement in effect on the date hereof.

          (b) Amendments and Waivers.  The provisions of this Agreement may not
              ----------------------
be amended, modified or supplemented, and waivers or consents to departures from
the provisions hereof may not be given, except by the Company and the written
consent of the Holders of a majority in principal amount of the Securities
affected by such amendment, modification, supplement, waiver or consents, or as
otherwise provided in the Pass Through Trust Agreements.

          (c) Notices.  All notices and other communications provided for or
              -------
permitted hereunder shall be made in writing by hand delivery, first-class mail,
facsimile transmission, or air courier which guarantees overnight delivery:

          (1) if to a Holder of the Securities, at the most current address
     given by such Holder to the Company.

          (2) if to the Purchasers:

               Credit Suisse First Boston Corporation
               Eleven Madison Avenue
               New York, NY 10010-3629
               Fax No.:  (212) 325-8278
               Attention:  Transactions Advisory Group

     with a copy to:

                                       18
<PAGE>

               Shearman & Sterling
               599 Lexington Avenue
               New York, NY  10022-6069
               Fax No.: (212) 848-7179
               Attention:  Alexander C. Bancroft, Esq.

          (3)  if to the Company, at its address as follows:

               Southern Energy Mid-Atlantic, LLC
               1155 Perimeter Center West
               Atlanta, Georgia  30338
               Fax:  (678) 579-5001
               Attention:  President

     with a copy to:

               Troutman Sanders LLP
               Bank of America Plaza, Suite 5200
               600 Peachtree Street, N.E.
               Atlanta, Georgia  30308
               Fax:  (404) 885-3001
               Attention:  John T.W. Mercer, Esq.

          All such notices and communications shall be deemed to have been duly
given:  at the time delivered by hand, if personally delivered; three business
days after being deposited in the mail, postage prepaid, if mailed; when receipt
is acknowledged by recipient's facsimile machine operator, if sent by facsimile
transmission; and on the day delivered, if sent by overnight air courier
guaranteeing next day delivery.

          (d) Third Party Beneficiaries.  The Holders shall be third party
              -------------------------
beneficiaries to the agreements made hereunder between the Company, on the one
hand, and the  Purchasers, on the other hand, and shall have the right to
enforce such agreements directly to the extent they may deem such enforcement
necessary or advisable to protect their rights or the rights of Holders
hereunder.

          (e) Successors and Assigns.  This Agreement shall be binding upon the
              ----------------------
Company and its successors and assigns.  If any transferee of any Purchaser
shall acquire a Security in any manner, whether by operation of law or
otherwise, by taking and holding such Security, such person shall be
conclusively deemed to have agreed to be bound by and to perform all the terms
and provisions of this Agreement and such person shall be entitled to receive
the benefits hereof.

          (f) Counterparts.  This Agreement may be executed in any number of
              ------------
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

                                       19
<PAGE>

          (g) Headings.  The headings in this Agreement are for convenience of
              --------
reference only and shall not limit or otherwise affect the meaning hereof.

          (h) Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED
              -------------
IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
PRINCIPLES OF CONFLICTS OF LAWS.

          (i) Severability.  If any one or more of the provisions contained
              ------------
herein, or the application thereof in any circumstance, is held invalid, illegal
or unenforceable, the validity, legality and enforceability of any such
provision in every other respect and of the remaining provisions contained
herein shall not be affected or impaired thereby.

          (j) Securities Held by the Company.  Whenever the consent or approval
              ------------------------------
of Holders of a specified percentage of principal amount of Securities is
required hereunder, Securities held by the Company or its affiliates (other than
subsequent Holders of Securities if such subsequent Holders are deemed to be
affiliates solely by reason of their holdings of such Securities) shall not be
counted in determining whether such consent or approval was given by the Holders
of such required percentage.

          (k) Agent for Service; Submission to Jurisdiction; Waiver of
              --------------------------------------------------------
Immunities.  By the execution and delivery of this Agreement, the Company (i)
----------
acknowledges that it has, by separate written instrument, irrevocably designated
and appointed CT Corporation System (and any successor entity), as its
authorized agent upon which process may be served in any suit or proceeding
arising out of or relating to this Agreement that may be instituted in any
federal or state court in the State of New York or brought under federal or
state securities laws, and acknowledges that CT Corporation System has accepted
such designation, (ii) submits to the nonexclusive jurisdiction of any such
court in any such suit or proceeding, and (iii) agrees that service of process
upon CT Corporation System and written notice of said service to the Company
shall be deemed in every respect effective service of process upon the Company
in any such suit or proceeding.  The Company further agrees to take any and all
action, including the execution and filing of any and all such documents and
instruments, as may be necessary to continue such designation and appointment of
CT Corporation System in full force and effect so long as any of the Transfer
Restricted Securities shall be outstanding.  To the extent that the Company may
acquire any immunity from jurisdiction of any court or from any legal process
(whether through service of notice, attachment prior to judgment, attachment in
aid of execution, execution or otherwise) with respect to itself or its
property, it hereby irrevocably waives such immunity in respect of this
Agreement, to the fullest extent permitted by law.

          (l) Termination of Agreement.  This Agreement shall automatically
              ------------------------
terminate upon payment in full of the Initial Securities solely from Escrowed
Funds (as defined in the Pass Through Trust Agreements).  Upon such termination,
neither of the parties hereto shall have any further obligations hereunder;
provided, however, that notwithstanding anything to the contrary in this
--------  -------
agreement, the obligations of the

                                       20
<PAGE>

Company under Section 5 hereto shall not terminate, and shall remain in full
force and effect.

                                       21
<PAGE>

          If the foregoing is in accordance with your understanding of our
agreement, please sign and return to the Company a counterpart hereof, whereupon
this instrument, along with all counterparts, will become a binding agreement
among the several Purchasers, the Company and SEI in accordance with its terms.

                              Very truly yours,

                              SOUTHERN ENERGY MID-ATLANTIC, LLC

                              By: /s/ Raymond V. Haley
                                  ------------------------------
                                  Name: Raymond V. Haley
                                  Title: Vice President

The foregoing Registration Rights Agreement is hereby confirmed and accepted as
of the date first above written.

CREDIT SUISSE FIRST BOSTON CORPORATION
acting on behalf of itself and as representative of the several Purchasers

By: /s/ James Bartlett
    --------------------
    Name: James Bartlett
    Title: Director

                                       22<PAGE>

                                                                 EXHIBIT 10.1(a)

                        ASSET PURCHASE AND SALE AGREEMENT

                                       FOR

                      GENERATING PLANTS AND RELATED ASSETS

                                 By and Between

                         POTOMAC ELECTRIC POWER COMPANY

                                       and

                              SOUTHERN ENERGY, INC.

                            Dated as of June 7, 2000
<PAGE>

                                TABLE OF CONTENTS
                                -----------------
                                                                           PAGE
                                                                           ----

ARTICLE I -        Definitions...............................................1
    Section 1.1      Definitions.............................................1
    Section 1.2      Accounting Terms .......................................1
ARTICLE II -       Purchase and Sale; Assumption of Certain Liabilities .....1
    Section 2.1      Purchase and Sale ......................................1
    Section 2.1      Auctioned Assets and Retained Assets ...................2
    Section 2.3      Assumed Obligations and Retained Liabilities ...........6
    Section 2.4      Third Party Consents ..................................11
ARTICLE III -      Purchase Price ..........................................11
    Section 3.1      Purchase Price ........................................11
    Section 3.2      Certain Post-Closing Adjustments ......................12
    Section 3.3      Allocation of Purchase Price ..........................13
    Section 3.4      PPA-Related Purchase Price Adjustments ................14
ARTICLE IV -       The Closing..............................................15
    Section 4.1      Time and Place of Closing .............................15
    Section 4.2      Payment of Estimated Purchase Price ...................16
ARTICLE V -        Representations and Warranties of Seller ,,..............16
    Section 5.1      Organization; Qualification ...........................17
    Section 5.2      Authority Relative to This Agreement ..................17
    Section 5.3      Consents and Approvals; No Violation ..................17
    Section 5.4      Personal Property .....................................18
    Section 5.5      Real Estate............................................18
    Section 5.6      Leases ................................................18
    Section 5.7      Certain Contracts and Arrangements ....................18
    Section 5.8      Legal Proceedings......................................18
    Section 5.9      Permits; Compliance with Law ..........................19
    Section 5.10     Environmental Matters .................................19
    Section 5.11     Labor Matters .........................................20
    Section 5.12     ERISA; Benefit Plans ..................................20
    Section 5.13     Taxes..................................................21
    Section 5.14     Undisclosed Liabilities ...............................21
    Section 5.15     Brokers................................................22
    Section 5.16     Insurance..............................................22
    Section 5.17     Disclaimers............................................22
ARTICLE VI -       Representations and Warranties of Buyer .................23
    Section 6.1      Organization ..........................................23
    Section 6.2      Authority Relative to This Agreement ..................23
    Section 6.3      Consents and Approvals; No Violation ..................23
    Section 6.4      Availability of Funds..................................24

                                       i
<PAGE>

    Section 6.5      Brokers................................................24
    Section 6.6      No Knowledge of Seller's Breach .......................24
    Section 6.7      Qualified Buyer .......................................25
    Section 6.8      WARN Act...............................................25
    Section 6.9      Financial Representations .............................25
    Section 6.10     Legal Proceedings .....................................25
ARTICLE VII -      Covenants of the Parties ................................25
    Section 7.1      Conduct of Business Relating to the Auctioned Assets ..25
    Section 7.2      Access to Information..................................28
    Section 7.3      Consents and Approvals; Transferable Permits ..........29
    Section 7.4      Further Assurances ....................................30
    Section 7.5      Public Statements .....................................31
    Section 7.6      Tax Matters............................................31
    Section 7.7      Bulk Sales or Transfer Laws ...........................31
    Section 7.8      Witness Services ......................................31
    Section 7.9      Control of Litigation .................................32
    Section 7.10     Confidentiality .......................................32
    Section 7.11     Risk of Loss ..........................................32
    Section 7.12     Tax Exempt Financing ..................................33
    Section 7.13     Compliance with Governmental Agreements ...............36
    Section 7.14     PJM;MAAC...............................................36
    Section 7.15     Trade Names............................................36
    Section 7.16     Enforcement of Retained Rights ........................37
    Section 7.17     Conduct of Business Relating to PPAs ..................37
ARTICLE VII -      Conditions...............................................37
    Section 8.1      Conditions Precedent to Each Party's Obligation
                     To Effect the Purchase and Sale .......................37
    Section 8.2      Conditions Precedent to Obligation of Buyer To
                     Effect the Purchase and Sale ..........................38
    Section 8.3      Conditions Precedent to Obligation of Seller To
                     Effect the Purchase and Sale ..........................39
ARTICLE IX -       Employee Matters ........................................41
    Section 9.1      Employee Matters ......................................41
    Section 9.2      Pension Plans .........................................43
    Section 9.3      Buyer's Savings Plan ..................................43
    Section 9.4      Severance Liabilities .................................45
    Section 9.5      COBRA..................................................45
    Section 9.6      WARN Act...............................................45
ARTICLE X -        Indemnification and Dispute Resolution ..................46
    Section 10.1     Indemnification .......................................46
    Section 10.2     Third Party Claims Procedures .........................48
ARTICLE XI -       Termination..............................................50
    Section 11.1     Termination............................................50
ARTICLE XII -      Miscellaneous Provisions ................................50
    Section 12.1     Expenses...............................................50

                                       ii
<PAGE>

    Section 12.2     Amendment and Modification; Extension; Waiver..........51
    Section 12.3     No Survival of Representations or Warranties...........51
    Section 12.4     Notices................................................51
    Section 12.5     Assignments; No Third Party Beneficiaries..............52
    Section 12.6     Governing Law..........................................53
    Section 12.7     Counterparts...........................................53
    Section 12.8     Interpretation.........................................53
    Section 12.9     Jurisdiction and Enforcement...........................54
    Section 12.10    Entire Agreement.......................................55
    Section 12.11    Severability...........................................55
    Section 12.12    Conflicts..............................................55

                                      iii
<PAGE>

                             SCHEDULES AND EXHIBITS
                             ----------------------

Schedules                       Title
---------                       -----
Schedule 1.1(a)                 Definitions
Schedule 1.1(c)                 Seller's Severance Plans
Schedule 2.2(a)(ii)             Spare Parts
Schedule 2.2(a)(iii)            Personal Property
Schedule 2.2(a)(iv)             Assigned Contracts
Schedule 2.2(a)(v)              Transferable Permits
Schedule 2.2(a)(vi)             Transferred SO\\2\\ Allowances
Schedule 2.2(a)(vii)            Transferred NO\\2\\ Allowances
Schedule 2.2(b)(i)              Retained Transmission and Distribution
                                Facilities
Schedule 2.2(b)(ii)(B)          Communications Equipment/Related Support
                                Equipment
Schedule 2.3(a)(iv)             Assumed Consent Order Obligations
Schedule 2.4                    Retained Rights/Unassigned PPAs
Schedule 5.3(a)                 Contracts Approvals; No Violation
Schedule 5.3(b)                 Seller Required Regulatory Approvals
Schedule 5.5(a)                 Real Estate Legal Description
Schedule 5.5(b)                 Title Surveys
Schedule 5.7                    Material Contract Defaults
Schedule 5.8                    Legal Proceedings
Schedule 5.9                    Permits
Schedule 5.10(a)                Environmental Matters
Schedule 5.10(b)                Environmental Notification
Schedule 5.10(c)                Environmental Reports
Schedule 5.12                   Benefit Plans
Schedule 6.3(b)                 Buyer Required Regulatory Approvals
Schedule 7.1(b)(viii)           Capital Expenditures
Schedule 7.12                   Exempt Facilities/Revenue Bonds

Exhibits                        Title
--------                        -----
Exhibit A                       Assignment and Assumption Agreement
Exhibit B                       Bill of Sale
Exhibit C-1, C-2, C-3 and C-4   Easements Agreements
Exhibit D                       Guarantee Agreement
Exhibit E-1, E-2, E-3 and E-4   Interconnection Agreements
Exhibit F                       Local Area Support Agreement
Exhibit G                       Operating Agreement
Exhibit H                       Potomac River Lease
Exhibit I-1 and I-2             Transition Power Agreements
Exhibit J                       Deeds of Conveyance
Exhibit K                       Opinion of Seller's Counsel

                                       iv
<PAGE>

Exhibit L                       Opinion of Buyer's Counsel
Exhibit M                       Opinion of Guarantor's Counsel

                                       v
<PAGE>

         ASSET PURCHASE AND SALE AGREEMENT (including the Schedules hereto, this
"Agreement"), dated as of June 7, 2000, by and between POTOMAC ELECTRIC POWER
 ---------
COMPANY, a District of Columbia and Virginia corporation ("Seller"), and
                                                           ------
SOUTHERN ENERGY, INC., a Delaware corporation ("Buyer," collectively with
                                                -----
Seller, the "Parties").
             -------

         WHEREAS, Seller owns certain power generating facilities (described
herein as the "Generating Facilities") and other assets associated therewith;
and

         WHEREAS, Buyer desires to purchase and assume, and Seller desires to
sell and assign, the Auctioned Assets (as defined in Section 2.2 below) and
certain associated liabilities, upon the terms and conditions hereinafter set
forth.

         NOW, THEREFORE, in consideration of the mutual covenants,
representations, warranties and agreements hereinafter set forth, and intending
to be legally bound hereby, the Parties agree as follows:

                                    ARTICLE I
                                    ---------

                                   Definitions
                                   -----------

         SECTION 1.1       Definitions. Any capitalized terms which are used but
                           -----------
not defined in this Agreement shall have the meaning given to such terms in the
attached Schedule 1.1.
         ------------

         SECTION 1.2       Accounting Terms. Any accounting terms used in this
                           ----------------
Agreement or the Ancillary Agreements shall, unless otherwise specifically
provided, have the meanings customarily given them in accordance with United
States generally accepted accounting principles ("GAAP") and all financial
                                                  ----
computations hereunder or thereunder shall, unless otherwise specifically
provided, be computed in accordance with GAAP consistently applied.

                                   ARTICLE II
                                   ----------

              Purchase and Sale; Assumption of Certain Liabilities
              ----------------------------------------------------

         SECTION 2.1       Purchase and Sale. Upon the terms and subject to the
                           -----------------
satisfaction of the conditions contained in this Agreement, at the Closing,
Seller agrees to sell, assign, convey, transfer and deliver to Buyer (or Buyer's
permitted assignees pursuant to Section 12.5(a)), and Buyer agrees to purchase
and acquire from Seller (or shall cause Buyer's permitted assignees pursuant to
Section 12.5(a) to purchase and acquire from Seller) all of the Auctioned
Assets. In the case of any
<PAGE>

Auctioned Assets not located at the Generating Facilities (including supplies,
materials and spare parts inventory), Buyer agrees that from and after the
Closing, Buyer will bear all risk of casualty or loss with regard to such
Auctioned Assets (regardless of whether they remain on Seller's Real Estate or
otherwise in Seller's possession).

         SECTION 2.2       Auctioned Assets and Retained Assets.
                           ------------------------------------

         (a) Auctioned Assets. The term "Auctioned Assets" means all of the
             ----------------
assets, real and personal property, goodwill and rights of Seller of whatever
kind and nature, whether tangible or intangible, in each case, primarily
relating to the power generation operations of the Generating Facilities and the
Support Operations, other than the Retained Assets, including the following:

             (i)          except with respect to the Potomac River Real
                          Property, all real property and leaseholds and other
                          interests in real property of Seller, together with
                          all buildings, improvements, structures and fixtures
                          thereon, including the Chalk Point/Morgantown Fuel
                          Pipeline, the Ryceville Pumping Station, the
                          Production Service Center, and the Ash Storage Sites,
                          subject to any Permitted Exceptions (the "Buyer Real
                          Estate");

             (ii)         all inventories of fuels, supplies, materials and
                          spare parts, together with and subject to (A) all
                          Permitted Exceptions, and (B) all warranties against
                          manufacturers and vendors relating thereto, including
                          the spare parts listed on Schedule 2.2(a)(ii), in each
                                                    -------------------
                          case, other than assets that become obsolete or that
                          are used, consumed, replaced or disposed of in the
                          ordinary course of business consistent with past
                          practice or as permitted by this Agreement;

             (iii)        the machinery, equipment (including any Revenue
                          Meters), facilities, furniture and other tangible
                          personal property on the Buyer Real Estate or the
                          Potomac River Station Site, including any items of
                          personal property located on the Buyer Real Estate,
                          the Potomac River Station Site or temporarily removed
                          from the Buyer Real Estate or the Potomac River
                          Station Site for repairs, servicing or maintenance and
                          listed on Schedule 2.2(a)(iii), together with and
                                    --------------------
                          subject to (A) any Permitted Exceptions, and (B) all
                          warranties against manufacturers or vendors relating
                          thereto, in each case, other than assets that become

                                       2
<PAGE>

                          obsolete or that are used, consumed, replaced or
                          disposed of in the ordinary course of business
                          consistent with past practice or as permitted by this
                          Agreement;

             (iv)         subject to Sections 2.2(b)(xi) and 2.4, all right,
                          title and interest of Seller in, to and under all
                          contracts, agreements, personal property leases
                          (whether Seller is lessor or lessee thereunder),
                          commitments and all other legally binding arrangements
                          (including any rights of Seller under any PPA to sell
                          energy to any third party power supplier) whether oral
                          or written, which are (A) set forth on Schedule
                                                                 --------
                          2.2(a)(iv), (B) not material to the ownership and
                          ----------
                          operation of the Generating Facilities, or (C)
                          otherwise entered into by Seller in accordance with
                          Section 7.1 (collectively, the "Contracts"), in each
                          case, to the extent in full force and effect on the
                          Closing Date;

             (v)          the Permits and Environmental Permits that are
                          transferred or transferable by Seller to Buyer
                          (collectively, the "Transferable Permits"), including
                          the Transferable Permits set forth on Schedule
                                                                --------
                          2.2(a)(v), in each case, to the extent in full force
                          ---------
                          and effect on the Closing Date;

             (vi)         the amount of SO\\2\\ Allowances listed on Schedule
                                                                     --------
                          2.2(a)(vi) attached hereto ("Transferred SO\\2\\
                          ----------                   -------------------
                          Allowances");
                          -----------

             (vii)        the amount of NO\\2\\ Allowances listed on Schedule
                                                                     --------
                          2.2(a)(vii) attached hereto ("Transferred NO\\1\\
                          -----------
                          Allowances");
                          ----------

             (viii)       (A) all data, information, books, operating records,
                          operating, safety and maintenance manuals, engineering
                          design plans, blueprints and as-built plans,
                          specifications, procedures, facility compliance plans,
                          environmental procedures and similar records, to the
                          extent in Seller's possession or readily available
                          (collectively, the "Operating Records"), and (B) to
                          the extent permitted by law, all personnel files
                          relating to the Transferred Employees, to the extent
                          in Seller's possession and readily available and to
                          the extent such files pertain to (1) skill and
                          development training and resumes, (2) seniority
                          histories, (3) salary and benefit information, (4)
                          Occupational Safety and Health Act medical reports,
                          (5) active medical restriction forms and

                                       3
<PAGE>

                          (6) any other matters, disclosure of which by Seller
                          to Buyer is permitted under applicable law without the
                          consent of the Transferred Employee, but not including
                          any performance evaluations or disciplinary records
                          (collectively, the "Transferred Employee Records");
                          provided, however, that Seller shall be permitted to
                          retain copies, or originals to the extent it provides
                          Buyer with copies of same, of all Operating Records
                          and Transferred Employee Records;

             (ix)         (A) except as provided in Section 2.2(b)(iv), the
                          software (provided, however, that Buyer acknowledges
                          that it will require licenses from third parties in
                          order to be legally entitled to use such software),
                          and (B) a non-exclusive, royalty-free license to use
                          solely in connection with the Auctioned Assets the
                          software or other copyrighted material owned by Seller
                          located at Buyer Real Estate; and

             (x)          all claims, causes of action, choses in action, rights
                          of recovery and rights of set-off of any kind in favor
                          of the Seller arising prior to the Closing Date
                          relating to the Auctioned Assets other than those
                          pertaining to the Retained Assets.

         (b) Retained Assets. The term "Retained Assets" means:
             ---------------            ---------------

             (i)          the electric transmission and distribution facilities
                          owned, controlled or operated by Seller for purposes
                          of providing point-to-point transmission service,
                          network integration service and distribution service
                          and other related purposes, used in controlling
                          continuity between the Generating Facilities and the
                          transmission and distribution facilities and for other
                          purposes (including the Seller's undivided ownership
                          interest in the Conemaugh Switchyard and the Conemaugh
                          Transmission Line), including those described on
                          Schedule 2.2(b)(i) attached hereto (the "Transmission
                          ------------------                       ------------
                          System");
                          ------

             (ii)         (A) except as set forth in Section 2.2(a)(iii), all
                          Interconnection Facilities and other transmission,
                          distribution and substation machinery, equipment and
                          facilities and related support equipment located on
                          Buyer Real Estate or Seller Real Estate or temporarily
                          removed

                                       4
<PAGE>

                          from Buyer Real Estate or Seller Real Estate for
                          repairs, servicing or maintenance; (B) Communications
                          Equipment and related support equipment (1) located on
                          Buyer Real Estate or temporarily removed from Buyer
                          Real Estate for repairs, servicing or maintenance and
                          listed on Schedule 2.2 (b)(ii)(B) or acquired by
                                    -----------------------
                          Seller after the date of this Agreement and designated
                          by Seller as a Retained Asset or (2) located on Seller
                          Real Estate or temporarily removed from Seller Real
                          Estate for repairs, servicing or maintenance; and (C)
                          all Protective Relaying Systems not located on Buyer
                          Real Estate;

             (iii)        all cash, cash equivalents, bank deposits and accounts
                          receivable;

             (iv)         (A) all mainframe computer systems of Seller and (B)
                          all software, copyrights, know-how or other
                          proprietary information not primarily relating to the
                          power generation operations of the Generating
                          Facilities, including software, copyrights, know-how
                          or other proprietary information licensed to Buyer
                          pursuant to Section 2.2(a)(ix)(B);

             (v)          the names "Pepco," "Potomac Electric Power Company,"
                          and any related or similar trade names, trademarks,
                          service marks or logos (and any rights to and in the
                          same, including any right to use the same);

             (vi)         any refunds or credits related to Taxes attributable
                          to taxable periods (or portions thereof) prior to the
                          Closing Date, and any other rents, charges,
                          liabilities or obligations paid prior to the Closing
                          Date in respect of the Auctioned Assets;

             (vii)        personnel records (other than Transferred Employee
                          Records) and all other records (other than Operating
                          Records);

             (viii)       (A) all Emission Reduction Credits or Greenhouse Gas
                          Emission Reduction Credits that are attributable to
                          any emission reduction activities of the Seller which
                          occur following the Closing Date at any locations, (B)
                          any SO\\2\\ Allowances that are not Transferred
                          SO\\2\\ Allowances, and

                                       5
<PAGE>

                          (C) any NO\\2\\ Allowances that are not Transferred
                          NO\\2\\ Allowances;

             (ix)         the Seller Real Estate (including a fee interest in
                          the Potomac River Real Property);

             (x)          all master station voltage control equipment within
                          and including the master station voltage control
                          cabinets located at the Generating Facilities;

             (xi)         the Retained Rights;

             (xii)        the Conemaugh Interest;

             (xiii)       all claims, causes of action, choses in action, rights
                          of recovery and rights of set-off of any kind in favor
                          of the Seller arising prior to the Closing Date other
                          than those pertaining to the Assumed Obligations; and

             (xiv)        any other asset that is not described with
                          particularity in this Agreement as an Auctioned Asset.

         SECTION 2.3       Assumed Obligations and Retained Liabilities.
                           --------------------------------------------

         (a) Assumed Obligations. At the Closing, Buyer shall assume, and from
             -------------------
and after the Closing, shall discharge, all of the liabilities and obligations,
direct or indirect, known or unknown, absolute or contingent, which relate to
the Auctioned Assets, the Potomac River Station Site or are otherwise specified
below, other than the Retained Liabilities (collectively, the "Assumed
                                                               -------
Obligations"), including the following:
-----------

             (i)          except as set forth in Section 2.3(b)(ii), any
                          liabilities and obligations under the Contracts
                          (including any obligations of Seller under any PPA to
                          sell energy to any third party power supplier);

             (ii)         any liabilities and obligations for goods delivered or
                          services rendered on or after the Closing Date
                          relating to the Auctioned Assets;

                                       6
<PAGE>

             (iii)        except as set forth in Section 2.3(b)(iii), (iv) or
                          (v), any Environmental Liability including any
                          Environmental Liability (A) arising out of or in
                          connection with any violation or alleged violation of,
                          or noncompliance or alleged noncompliance with, any
                          Environmental Laws, prior to, on or after the Closing
                          Date, relating to or arising in connection with the
                          Auctioned Assets and the Potomac River Station Site,
                          (B) arising out of or in connection with the condition
                          of any Auctioned Assets and the Potomac River Station
                          Site prior to, on or after the Closing Date, including
                          any actual or alleged presence, Release or threatened
                          Release of any Hazardous Substances at, on, in, under
                          or migrating onto or from, the Auctioned Assets and
                          the Potomac River Station Site, prior to, on or after
                          the Closing Date, (C) arising out of or in connection
                          with any Release or threatened Release of any
                          Hazardous Substance prior to, on or after the Closing
                          Date relating to any equipment, Hazardous Substance,
                          product or recyclable or recycled material
                          (collectively, the "Disposed Items") which remains on
                          or has been removed from the Auctioned Assets and the
                          Potomac River Station Site, (D) in respect of any
                          personal injury or property damage relating to or
                          arising from the presence, exposure to, or proximity
                          to any Hazardous Substance, prior to, on or after the
                          Closing Date, and (E) of any sort whatsoever arising
                          or occurring on or after the Closing Date;

             (iv)         any liabilities and obligations under all consent
                          orders including those listed on Schedule 2.3(a.)(iv)
                                                           --------------------
                          (the "Assumed Consent Order Obligations");
                                ---------------------------------

             (v)          except as set forth in Section 2.3(b)(iv), any
                          liabilities and obligations with respect to the
                          Permits to the extent arising or accruing on or after
                          the Closing Date;

             (vi)         (A) all wages, overtime, employment taxes, workers
                          compensation benefits, occupational safety and health
                          liabilities or other similar liabilities and
                          obligations in respect of Transferred Employees
                          arising or accruing on or after the Closing Date, and
                          (B) all other liabilities and obligations with respect
                          to the Transferred Employees for which Buyer is
                          responsible pursuant to Article IX;

                                       7
<PAGE>

             (vii)        (A) any liabilities and obligations in respect of any
                          personal injury or property (real or personal) damage
                          claim (including any claim based on wrongful death)
                          relating to, resulting from, or arising out of the
                          Auctioned Assets and the Potomac River Station Site,
                          arising or occurring on or after the Closing Date, or
                          (B) any liabilities and obligations in respect of any
                          discrimination, wrongful discharge or unfair labor
                          practice claim by any Transferred Employee arising out
                          of or relating to acts or omissions occurring on or
                          after the Closing Date;

             (viii)       any liabilities and obligations, with respect to the
                          periods that include the Closing Date, with respect to
                          real or personal property rent, Taxes based on the
                          ownership or use of property, utilities charges and
                          similar charges that primarily relate to the
                          Generating Facilities (collectively, the "Prorated
                                                                    --------
                          Items"), including (A) personal property taxes, real
                          -----
                          estate and occupancy taxes, assessments and other
                          charges, (B) rent and all other items payable by
                          Seller under any Contract, (C) any fees with respect
                          to any Transferable Permit and (D) sewer rents and
                          charges for water, telephone, electricity and other
                          utilities, in each case calculated by multiplying the
                          amount of any such Prorated Item by a fraction the
                          numerator of which is the number of days in such
                          period beginning on and after the Closing Date and the
                          denominator of which is the number of days in such
                          period;

             (ix)         any liabilities and obligations in respect of Taxes
                          (other than as provided for by Section 2.3 (a)(viii))
                          attributable to the Auctioned Assets arising or
                          accruing during taxable periods (or portions thereof)
                          beginning on or after the Closing Date;

             (x)          any severance costs payable under Seller's Severance
                          Plans with respect to those Non-Union Employees who do
                          not receive a Qualified Offer by the Buyer pursuant to
                          Section 9.1 (such liabilities are the "Closing
                                                                 -------
                          Severance Expenses");
                          ------------------

             (xi)         any liabilities and obligations of the Buyer relating
                          to the Potomac River Station Site as contemplated by
                          the Potomac River Lease;

                                       8
<PAGE>

             (xii)        all liabilities and obligations of Seller under the
                          loan agreements set forth on Schedule 7.12 attached
                                                       -------------
                          hereto (the "Loan Agreements") with respect to the
                          Revenue Bonds; and

             (xiii)       any liabilities and obligations under the Ancillary
                          Agreements in respect of the Auctioned Assets arising
                          on or after the Closing Date.

         (b) Retained Liabilities. Buyer shall not assume or be obligated to
             --------------------
pay, perform or otherwise discharge the following liabilities or obligations
(the "Retained Liabilities"):
      --------------------

             (i)          any liabilities and obligations of Seller exclusively
                          relating to any Retained Assets (other than as set
                          forth in Section 2.3(a)(xi));

             (ii)         any liabilities and obligations under the Contracts
                          which relate to (A) goods delivered or services
                          rendered prior to the Closing Date, and (B) breaches
                          by the Seller of its obligations thereunder occurring
                          prior to the Closing Date;

             (iii)        (A) any Environmental Liability of Seller arising out
                          of or in connection with the disposal by, or on behalf
                          of, Seller and Release or threatened Release, prior to
                          the Closing Date of Hazardous Substances at any
                          Off-Site location, (B) any Environmental Liability of
                          Seller arising out of or in connection with any
                          Release or threatened Release of any Hazardous
                          Substance on or after the Closing Date from the Seller
                          Facilities or otherwise originating from, or relating
                          to, any equipment owned or used by Seller that is
                          located on Buyer Real Estate, and (C) any liability in
                          respect of any personal injury claims relating to the
                          exposure of a third party to asbestos at the Auctioned
                          Assets or the Potomac River Station Site which have
                          been filed with any state or federal court having
                          jurisdiction prior to the Closing Date;

             (iv)         notwithstanding the Assumed Obligations set forth in
                          Section 2.3(a)(iii)(A), any monetary fines or
                          penalties (including fines or penalties from
                          violations of any Environmental Law) imposed by a
                          Governmental Authority to the extent arising out of or
                          relating to acts or omissions

                                       9
<PAGE>

                          of Seller in respect of the Auctioned Assets prior to
                          the Closing Date;

             (v)          any Environmental Liability whatsoever arising out of,
                          related to, or otherwise associated with the Release
                          of fuel oil from the Ryceville-Piney Point Pipeline
                          described in Schedule 5.10(a);

             (vi)         (A) all wages, overtime, employment taxes, workers
                          compensation benefits, occupational safety and health
                          liabilities or other similar liabilities and
                          obligations in respect of Transferred Employees to the
                          extent arising or accruing prior to the Closing Date
                          and (B) all other liabilities and obligations with
                          respect to the Transferred Employees for which Seller
                          is responsible pursuant to Article IX;

             (vii)        any liabilities and obligations (A) in respect of any
                          personal injury or property damage claim (other than
                          any Environmental Liabilities which are Assumed
                          Obligations pursuant to Section 2.2(a)(iii) above)
                          relating to the Auctioned Assets arising or occurring
                          prior to the Closing Date, or (B) in respect of any
                          discrimination, wrongful discharge or unfair labor
                          practice claim by any Transferred Employee arising out
                          of or relating to acts or omissions of Seller prior to
                          the Closing Date;

             (viii)       any liabilities and obligations, with respect to
                          periods prior to the Closing Date, for the Prorated
                          Items, calculated as set forth in Section
                          2.3(a)(viii);

             (ix)         any liabilities and obligations in respect of Taxes
                          (other than as provided for by Section 2.3(b)(vii))
                          attributable to the Auctioned Assets or trades or
                          businesses associated with the Auctioned Assets
                          arising or accruing during taxable periods (or
                          portions thereof) ending before the Closing Date; and

             (x)          any liabilities and obligations of Seller under the
                          Ancillary Agreements in respect of the Retained
                          Assets.

                                       10
<PAGE>

         SECTION 2.4       Third Party Consents
                           --------------------

         (a) Notwithstanding Section 2.2(a)(ii), (iii) or (iv), to the extent
that Seller's rights under any Contract or warranty may not be assigned without
the consent of another person which consent has not been obtained, this
Agreement shall not constitute an agreement to assign the same if an attempted
assignment would constitute a breach thereof or be unlawful, and Seller, at its
expense, shall use its reasonable best efforts to obtain prior to the Closing
any such required consents with respect to any Material Contracts or material
warranties.

         (b) Seller and Buyer agree that if any consent to an assignment of any
such Material Contract or material warranty shall not be obtained or if any
attempted assignment would in Seller's reasonable opinion be ineffective or
would impair any material rights and obligations of Buyer under such Material
Contract or material warranty, as applicable, so that Buyer would not in effect
acquire the benefit of all such rights and obligations, Seller, to the maximum
extent permitted by law and such Material Contract or material warranty, as
applicable, shall after the Closing appoint Buyer to be Seller's representative
and agent with respect to such Material Contract or material warranty, as
applicable, and Seller shall, to the maximum extent permitted by law and such
Material Contract or material warranty, as applicable, enter into such
reasonable arrangements with Buyer as are necessary to provide Buyer with the
benefits and obligations of such Material Contract or material warranty, as
applicable. Notwithstanding any of the foregoing, in the event that Seller is
unable to obtain a consent from a Power Seller to an assignment of a PPA, such
PPA shall be governed by Section II of Schedule 2.4 attached hereto. Seller and
                                       ------------
Buyer shall cooperate and shall each use their reasonable best efforts after the
Closing to obtain an assignment of each such Material Contract or material
warranty, as applicable, to Buyer.

                                   ARTICLE III
                                   -----------

                                 Purchase Price
                                 --------------

          SECTION 3.1      Purchase Price. Subject to adjustment pursuant to
                           --------------
Sections 3.2 and 3.4, the amount payable by Buyer to Seller for the Auctioned
Assets shall be the sum of (a) Two Billion Six Hundred Fifty Million Dollars
($2,650,000,000.00) (the "Purchase Price"), (b) an amount equal to the Final
Fuel Related Adjustment Amount, (c) an amount equal to the Final Non-Fuel
Related Adjustment Amount, and (d) an amount expended by Seller between the date
hereof and the Closing Date for Permitted Capital Expenditures pursuant to
Section 7.1(b)(viii).

                                       11
<PAGE>

         SECTION 3.2       Certain Post-Closing Adjustments.
                           --------------------------------

         (a) Within 60 Business Days after the last day of the month in which
Closing occurs, Seller shall prepare and deliver to Buyer a statement (an
"Adjustment Statement") which reflects (i) the book cost, as reflected on the
 --------------------
books of Seller as of the Closing Date, of all inventories, materials, spare
parts and supplies (excluding any fuel supplies) included in the Auctioned
Assets (the "Final Non-Fuel Related Adjustment Amount") and (ii) the book value,
             ----------------------------------------
as determined using Seller's historical weighted average method, of all fuel
supplies included in the Auctioned Assets (the "Final Fuel Related Adjustment
                                                -----------------------------
Amount"). The Final Fuel Related Adjustment Amount will be based on the actual
------
fuel inventory on the Closing Date, and the Final Non-Fuel Related Adjustment
Amount will be based on an inventory survey conducted within 30 Business Days
prior to the Closing Date, in each case, consistent with the inventory
procedures of Seller in effect as of the date of this Agreement (the "Inventory
                                                                      ---------
Survey"). Seller will permit an employee, or representative, of Buyer to observe
------
the Inventory Survey. The Adjustment Statement shall be prepared using (i) GAAP
and (ii) with respect to the Final Non-Fuel Related Adjustment Amount the same
system average price that Seller has historically used to calculate the book
cost of its supplies, materials and spare parts inventory. Buyer agrees to
cooperate with Seller in connection with the preparation of the Adjustment
Statement and related information, and shall provide to Seller such access,
books, records and information as may be reasonably requested from time to time.

         (b) Buyer may dispute the quantity delivered or quality of any
inventory item shown on the Adjustment Statement, or the mathematical
calculations reflected therein, by notifying Seller in writing of the disputed
amount, and the basis of such dispute, within 20 Business Days of Buyer's
receipt of the Adjustment Statement; provided, however, that in respect of the
quality of any inventory item, Buyer may not dispute Seller's normal and
customary methods for accounting for excess inventory. Buyer shall have no right
to dispute any other matter in respect of the Adjustment Statement, including
historical system average price used to calculate the book cost of the inventory
and the Final Non-Fuel Related Adjustment Amount or the appropriateness, under
GAAP or otherwise, of using such historical system average price to determine
the book cost of any particular item of inventory. In the event of a dispute
with respect to the quantity or quality of any inventory item shown on the
Adjustment Statement, or the mathematical calculations reflected therein, Buyer
and Seller shall attempt to reconcile their differences and any resolution by
them as to any disputed amounts shall be final, binding and conclusive on the
Parties. If Buyer and Seller are unable to reach a resolution of such
differences within 20 Business Days of receipt of Buyer's written notice of
dispute to Seller, Buyer and Seller shall submit the amounts remaining in
dispute for determination and resolution to KPMG Peat Marwick or any other
accounting firm

                                       12
<PAGE>

of recognized national standing reasonably acceptable to Seller and Buyer (the
"Accountants"), which shall be instructed to determine and report to the
 -----------
Parties, within 20 Business Days after such submission, upon such remaining
disputed amounts, and such report shall be final, binding and conclusive on the
Parties with respect to the amounts disputed. Buyer and Seller shall each pay an
amount, if any, equal to that percentage of the fees and disbursements of the
Accountants incurred in connection with the resolution of such disputed amounts
that corresponds to the percentage of disputed amounts awarded to the other
Party by the Accountants hereunder.

         (c) For purposes of this Agreement, the "Closing Adjustment Amount"
shall be the sum of (A) the amount of the Final Non-Fuel Related Adjustment
Amount, and (B) the amount of the Final Fuel Related Adjustment Amount minus
                                                                       -----
(ii) the amount of the Estimated Non-Fuel Related Adjustment Amount. If the
Closing Adjustment Amount is a positive number, then on the Adjustment Date (as
defined below), Buyer shall pay to Seller the amount of such positive number. If
the Closing Adjustment Amount is a negative number, then on the Adjustment Date,
Seller shall pay to Buyer the amount of such negative number. For purposes of
this Agreement, the "Adjustment Date" means (1) if Buyer does not disagree in
                     ---------------
any respect with the Adjustment Statement, the 23rd Business Day following
Buyer's receipt of the Adjustment Statement or (2) if Buyer shall disagree in
any respect with the Adjustment Statement, the third Business Day following
either the resolution of such disagreement by the Parties or a final
determination by the Accountants in accordance with Section 3.2(b). Any amount
paid under this Section 3.2(c) shall be paid with interest for the period
commencing on the Closing Date up to but not including the date of payment,
calculated at the prime rate of The Chase Manhattan Bank in effect on the
Closing Date, and in cash by wire transfer of immediately available funds.

         SECTION 3.3       Allocation of Purchase Price. Buyer shall deliver to
                           ----------------------------
Seller at Closing a preliminary allocation among the Auctioned Assets of the
amount payable by Buyer to Seller pursuant to Section 3.1 hereof, and, as soon
as practicable following the Closing (but in any event within 30 days following
the final determination of the Closing Adjustment Amount), Buyer shall prepare
and deliver to Seller a final allocation of the amount payable by Buyer to
Seller pursuant to Section 3.1 hereof, and the post-closing adjustment pursuant
to Section 3.2, among the Auctioned Assets (the "Allocation"). The Allocation
                                                 ----------
shall be consistent with Section 1060 of the Code and the Treasury Regulations
thereunder. Seller hereby agrees to accept Buyer's Allocation unless Seller
determines that such Allocation was not prepared in accordance with Section 1060
of the Code and the regulations thereunder ("Applicable Law"). If Seller so
                                             --------------
determines, Seller shall within 20 Business Days thereafter propose any changes
necessary to cause the Allocation to be prepared in accordance with Applicable
Law. Within 10 Business Days

                                       13
<PAGE>

following delivery of such proposed changes, Buyer shall provide Seller with a
statement of any objections to such proposed changes, together with a reasonably
detailed explanation of the reasons therefor. If Buyer and Seller are unable to
resolve any disputed objections within 10 Business Days thereafter, such
objections shall be referred to the Accountants, whose review will be limited to
whether Buyer's Allocation of such disputed items regarding the Allocation was
prepared in accordance with Applicable Law. The Accountants shall be instructed
to deliver to Seller and Buyer a written determination of the proper allocation
of such disputed items within 20 Business Days. Such determination shall be
conclusive and binding upon the parties hereto for all purposes, and the
Allocation shall be so adjusted (the Allocation, including the adjustment, if
any, to be referred to as the "Final Allocation"). Fees and disbursements of the
                               ----------------
Accountants attributable to the Allocation shall be shared by Buyer and Seller
on the basis of their respective percentages of the disputed items which were
allocated by the Accountants to the other Party hereunder. Each of Buyer and
Seller agrees to timely file Internal Revenue Service Form 8594, and all
Federal, state, local and foreign Tax Returns, in accordance with such Final
Allocation and to report the transactions contemplated by this Agreement for
Federal Income Tax and all other tax purposes in a manner consistent with the
Final Allocation. Each of Buyer and Seller agrees to promptly provide the other
party with any additional information and reasonable assistance required to
complete Form 8594, or compute Taxes arising in connection with (or otherwise
affected by) the transactions contemplated hereunder. Each of Buyer and Seller
shall timely notify the other Party and each shall timely provide the other
Party with reasonable assistance in the event of an examination, audit or other
proceeding regarding the Final Allocation.

         SECTION 3.4       PPA-Related Purchase Price Adjustments.
                           --------------------------------------

         (a) In the event Closing occurs hereunder with respect to the Auctioned
Assets other than the Panda PPA as contemplated by Section 4.1,

             (i)          at the Closing, Buyer shall deposit Two Hundred
                          Fifty-Nine Million Eight Hundred Twenty-Seven Thousand
                          Dollars ($259,827,000.00) in immediately available
                          funds in an interest-bearing escrow account pursuant
                          to an escrow agreement mutually satisfactory to the
                          Parties, providing for the release to Seller of the
                          remaining balance of such escrow account after the
                          release, if any, to Buyer pursuant to Section
                          3.4(a)(ii) (together with all earnings on such
                          remaining balance) upon the earlier to occur of
                          completion of the post-Closing consummation of this
                          Agreement with respect to the Panda PPA (the "Panda
                          Release") or the twelve (12) month period following
                          the Closing (after

                                       14
<PAGE>

                          which the Panda PPA shall no longer be an "Assigned
                          Contract" under Schedule 2.2(a)(iv)) ; and

             (ii)         at the time of the Panda Release, subject to Section
                          3.4(b), the escrow agent shall release to Buyer the
                          funds deposited in the escrow account described in
                          Section 3.4(a)(i) (together with all earnings on the
                          principal released).

         (b) In the event the Closing or the Panda Release occurs after October
31,2000, Buyer shall pay Seller at Closing or at the time of the Panda Release,
as applicable, by wire transfer of immediately available funds (or in the case
of the Panda Release, the escrow agent shall reduce the amount released to Buyer
pursuant to Section 3.4(a)(ii) above by) an amount in United States Dollars
equal to One Million Two Hundred Thousand Dollars ($1,200,000.00) per month with
respect to the Panda PPA, and Two Million Seven Hundred Thousand Dollars
($2,700,000.00) per month with respect to the OE PPA, as applicable, (the
"Adjustment Amounts") for each calendar month (prorated for any portion of a
calendar month) occurring between October 31, 2000 and the Closing Date or the
time of the Panda Release, as applicable. In the event that the Panda Release
does not occur within the twelve (12) month period described in Section
3.4(a)(i), the escrow agent shall release to Seller the entire amount in such
escrow account (together with all earnings thereon). The foregoing amounts shall
be adjustments to the Purchase Price.

                                   ARTICLE IV
                                   ----------

                                   The Closing
                                   -----------

         SECTION 4.1       Time and Place of Closing.
                           -------------------------

         (a) Upon the terms and subject to the satisfaction of the conditions
contained in Article VIII, the closing of the sale of the Auctioned Assets
contemplated by this Agreement (the "Closing") will take place on such date as
                                     -------
the Parties may agree, which date shall be as soon as practicable, but no later
than ten Business Days, following the date on which all of the conditions set
forth in Article VIII have been satisfied or waived, at the Washington, D.C.
offices of Dickstein Shapiro Morin & Oshinsky LLP, or at such other place or
time as the Parties may agree. Notwithstanding the foregoing, in the event all
conditions set forth in Article VIII are satisfied other than the condition set
forth in Section 8.3(b), Closing will take place with respect to all of the
Auctioned Assets as set forth above, provided, however, the Panda Release shall
occur only upon satisfaction or waiver of the condition set forth in Section
8.3(h) (which condition may only be waived by Seller if the MDPSC has either
issued an order determining that the

                                       15
<PAGE>

Panda Release does not violate the Panda PPA or dismissed the proceeding listed
at Item 1 of Schedule 5.8). The date and time at which the Closing actually
occurs is hereinafter referred to as the "Closing Date".
                                          ------------

         (b) The Parties agree that in the event there is a post-Closing Panda
Release, the effect hereunder shall be limited to (i) the Purchase Price
adjustments and other payments contemplated by Section 3.4; (ii) delivery by the
Parties at the time of the Panda Release of a Novation or other instruments of
assignment and assumption in respect of the Panda PPA, or an acknowledgement of
the applicability as of the time of the Panda Release of the provisions of
Section II of Schedule 2.4 hereto to the Panda PPA; (iii) exclusion of the Panda
              ------------
PPA from the scope of all representations, warranties and opinions delivered at
Closing (which representations, warranties and opinions as to the Panda PPA will
be required to be delivered at the time of the Panda Release); and (iv)
references in this Agreement and the Ancillary Agreements to the Closing Date
relating to the Panda PPA shall be deemed references to the date of the Panda
Release.

         SECTION 4.2       Payment of Estimated Purchase Price. (a) At the
                           -----------------------------------
Closing, Buyer will pay or cause to be paid to Seller by wire transfer of
immediately available funds to an account previously designated in writing by
Seller an amount in United States dollars equal to the sum of (a) Two Billion
Six Hundred Fifty Million Dollars ($2,650,000,000.00), (b) an amount equal to
the Estimated Non-Fuel Related Adjustment Amount, (c) an amount expended by
Seller between the date hereof and the Closing Date for Permitted Capital
Expenditures pursuant to Section 7.1(b)(viii) (the "Estimated Purchase Price").
                                                    ------------------------
In addition, at the Closing, Buyer will promptly pay Seller an amount equal to
the Closing Severance Expenses, as contemplated by Section 2.3(a)(x) hereof.

         (b) At least 5 Business Days prior to the Closing Date, Seller shall
provide to Buyer its good faith estimate of the Final Non-Fuel Related
Adjustment Amount as of the last day of the month preceding the Closing Date,
which estimate shall be certified in writing by an appropriate officer of Seller
(the "Estimated Non-Fuel Related Adjustment Amount"). On or before the Closing
      --------------------------------------------
Date, Seller shall provide to Buyer a report which details the amounts expended
by Seller between the date hereof and the Closing Date for Permitted Capital
Expenditures pursuant to Section 7.1(b)(viii) (the "Permitted Capital
                                                    -----------------
Expenditure Report").
------------------

                                    ARTICLE V
                                    ---------

                    Representations and Warranties of Seller
                    ----------------------------------------

         Seller represents and warrants to Buyer as follows:

                                       16
<PAGE>

         SECTION 5.1       Organization; Qualification. Seller is a corporation
                           ---------------------------
duly incorporated, validly existing and in good standing under the laws of the
Commonwealth of Virginia and the District of Columbia and has all requisite
corporate power and authority to own, lease and operate the Auctioned Assets and
to carry on the business of the Auctioned Assets as currently conducted.

         SECTION 5.2       Authority Relative to This Agreement. Seller has all
                           ------------------------------------
necessary corporate power and authority to execute and deliver this Agreement
and the Ancillary Agreements and to consummate the transactions contemplated
hereby and thereby. The execution and delivery by Seller of this Agreement and
the Ancillary Agreements and the consummation by Seller of the transactions
contemplated hereby and thereby have been duly and validly authorized by the
Board of Directors of Seller or by a committee thereof to whom such authority
has been delegated and no other corporate proceedings on the part of Seller are
necessary to authorize this Agreement or the Ancillary Agreements or the
consummation of the transactions contemplated hereby or thereby. This Agreement
and the Ancillary Agreements have been duly and validly executed and delivered
by Seller and, assuming that this Agreement and the Ancillary Agreements
constitute valid and binding agreements of Buyer and each other party thereto,
subject to the receipt of the Seller Required Regulatory Approvals and the Buyer
Required Regulatory Approvals, constitute valid and binding agreements of
Seller, enforceable against Seller in accordance with their respective terms.

         SECTION 5.3       Consents and Approvals; No Violation.
                           ------------------------------------

         (a) Subject to obtaining the Seller Required Regulatory Approvals and
the Buyer Required Regulatory Approvals, neither the execution and delivery of
this Agreement or the Ancillary Agreements by Seller nor the consummation of the
transactions contemplated hereby or thereby or the sale by Seller of the
Auctioned Assets pursuant to this Agreement will (i) conflict with or result in
any breach of any provision of the Certificate of Incorporation or By-laws of
Seller, (ii) except as set forth on Schedule 5.3(a), result in a default (or
                                    ---------------
give rise to any right of termination, cancellation or acceleration) under any
of the terms, conditions or provisions of any note, bond, mortgage, indenture,
license, agreement, lease or other instrument or obligation to which Seller is a
party or by which Seller, or any of the Auctioned Assets, may be bound, except
for such defaults (or rights of termination, cancellation or acceleration) as to
which requisite waivers or consents have been obtained or which would not,
individually or in the aggregate, create a Material Adverse Effect, or (iii)
violate any order, writ, injunction, decree, statute, rule or regulation
applicable to Seller, or the Auctioned Assets, except for such violations which
would not, individually or in the aggregate, create a Material Adverse Effect.

                                       17
<PAGE>

         (b) Except for (i) the filings by Seller and Buyer required by the HSR
Act and the expiration or earlier termination of all waiting periods under the
HSR Act, and (ii) the Required Regulatory Approvals set forth on Schedule 5.3(b)
                                                                 ---------------
attached hereto (collectively, the "Seller Required Regulatory Approvals"), no
                                    ------------------------------------
declaration, filing or registration with, or notice to, or authorization,
consent or approval of any Governmental Authority is necessary for the
consummation by Seller of the transactions contemplated hereby or by the
Ancillary Agreements, other than such declarations, filings, registrations,
notices, authorizations, consents or approvals (A) which, if not obtained or
made, would not individually or in the aggregate, create a Material Adverse
Effect or (B) which relate to the Transferable Permits.

         SECTION 5.4       Personal Property. Except for Permitted Exceptions,
                           -----------------
Seller has good and marketable title, free and clear of all Encumbrances, to all
personal property included in the Auctioned Assets.

         SECTION 5.5       Real Estate. Except for Permitted Exceptions, Seller
                           -----------
has good and marketable title, free and clear of all Encumbrances, to all Buyer
Real Estate Schedule 53(a) contains legal descriptions of the Buyer Real Estate.
            --------------
The most recent real property surveys in the possession of Seller with respect
to the Buyer Real Estate or any portion thereof are listed on Schedule 5.5(b).
                                                              ---------------

         SECTION 5.6       Leases. As of the date of this Agreement, Seller is
                           ------
not a tenant under any real property leases which are material to the Auctioned
Assets.

         SECTION 5.7       Certain Contracts and Arrangements. (a) Except for
                           ----------------------------------
(i) any contract or agreement listed on Schedule 2.2(a)(iv) (the "Material
                                        -------------------       --------
Contracts") and (ii) Contracts which will expire prior to the Closing Date or
---------
that are permitted to be entered into under this Agreement, Seller is not a
party to any contract which is material to the business or operations of the
Auctioned Assets.

         (b) Each Contract (1) constitutes a valid and binding obligation of
Seller, and, to the Knowledge of Seller, of the other parties thereto, and (ii)
to the Knowledge of Seller, is in full force and effect.

         (c) Except as set forth on Schedule 5.7 attached hereto, to the
                                    ------------
Knowledge of the Seller, there is not, under any of the Contracts, any default
or event which, with notice or lapse of time or both, would constitute a
material default by Seller, except for such events of default and other events
as to which requisite waivers or consents have been obtained or which would not,
individually or in the aggregate, create a Material Adverse Effect.

         SECTION 5.8       Legal Proceedings. Except as set forth on Schedule
                           -----------------                         --------
5.8 or in the Filed Seller SEC Documents, as of the date of this Agreement,
---
there are no claims, actions, proceedings or investigations pending or, to the
Knowledge of

                                       18
<PAGE>

Seller, threatened against or relating to Seller with respect to the business or
operations of the Auctioned Assets, before any Governmental Authority which
would, individually or in the aggregate, be reasonably expected to create a
Material Adverse Effect. With respect to the business or operations of the
Auctioned Assets, Seller is not, as of the date of this Agreement, subject to
any outstanding judgment, rule, order, writ, injunction or decree of any
Governmental Authority which could create a Material Adverse Effect. The
representations and warranties of Seller set forth in this Section 5.8 shall not
apply to, and do not cover, any environmental matters which, with respect to any
representations and warranties of Seller, are exclusively governed by Section
5.10.

         SECTION 5.9       Permits; Compliance with Law. Except as set forth on
                           ----------------------------
Schedule 5.9 or in the Filed Seller SEC Documents, Seller is in current
------------
compliance with all Permits necessary to conduct the business and operations of
the Auctioned Assets as currently conducted, and, to the Knowledge of Seller,
Seller is otherwise in current compliance with all laws, statutes, orders,
rules, regulations, ordinances or judgments of any Governmental Authority
applicable to the business and operations of the Auctioned Assets, except for
such failures to comply with such Permits, or such failures to be in compliance
with such laws, statutes, orders, rules, regulations, ordinances or judgments,
which would not, individually or in the aggregate, create a Material Adverse
Effect. The representations and warranties of Seller set forth in this Section
5.9 shall not apply to, and do not cover, any environmental matters which, with
respect to any representations and warranties of Seller, are exclusively
governed by Section 5.10.

         SECTION 5.10      Environmental Matters.
                           ---------------------

         (a) Except as set forth in Schedule 5.10(a) or disclosed in the Filed
                                    ----------------
Seller SEC Documents, Seller holds, and is in compliance with all Environmental
Permits required for Seller to conduct the business and operations of the
Auctioned Assets as currently conducted under applicable Environmental Laws,
and, to the Knowledge of Seller, Seller is otherwise in current compliance with
all applicable Environmental Laws on the date hereof with respect to the
business and operations of the Auctioned Assets, except for such failures to
hold or comply with such Environmental Permits, or such failures to be in
compliance with such applicable Environmental Laws on the date hereof, which
would not, individually or in the aggregate, create a Material Adverse Effect.

         (b) Except as set forth in Schedule 5.10(b) or disclosed in the Filed
                                    ----------------
Seller SEC Documents, Seller has not received any written notice of a violation
of any Environmental Law, or been notified that it is a potentially responsible
party under the Federal Comprehensive Environmental Response, Compensation, and
Liability Act or any similar state law with respect to any real property
included in the

                                       19
<PAGE>

Buyer Real Estate or any Off-Site location, except for such matters under such
Environmental Laws as would not, individually or in the aggregate, create a
Material Adverse Effect.

         (c) To the Knowledge of Seller, no Release of Hazardous Substances has
occurred at, from, in, on, or under the real property included in the Buyer Real
Estate that has given, or could give rise to Environmental Liabilities under
Environmental Laws, except for such Environmental Liabilities which (i) are
disclosed in the environmental reports set forth on Schedule 5.10(c) attached
                                                    ----------------
hereto, or (ii) would not, individually or in the aggregate, have a Material
Adverse Effect.

For purposes of the representations and warranties made in this Article V, the
Seller specifically disclaims any representations and warranties with respect to
standards of performance for new stationary sources promulgated under Section
111 of the Federal Clean Air Act, 42 U.S.C. ss. 7411. The representations and
warranties made in this Section 5.10 are the exclusive representations and
warranties of the Seller relating to environmental matters as of the date
hereof.

         SECTION 5.11      Labor Matters. Seller has previously made available
                           -------------
to Buyer copies of all collective bargaining agreements to which Seller is a
party or is subject and which relate to the business or operations of the
Auctioned Assets. With respect to the business and operations of the Auctioned
Assets, as of the date of this Agreement, (a) Seller is in compliance with all
applicable laws regarding employment and employment practices, terms and
conditions of employment and wages and hours, (b) Seller has not received
written notice of any unfair labor practice complaint against Seller pending
before the National Labor Relations Board, (c) there is no labor strike,
slowdown or stoppage actually pending or, to the Knowledge of Seller, threatened
against or affecting Seller, (d) Seller has not received notice that any
representation petition respecting the employees of Seller has been filed with
the National Labor Relations Board, (e) no arbitration proceeding arising out of
or under collective bargaining agreements is pending against Seller and (f)
Seller has not experienced any primary work stoppage since December 31, 1998,
except, in the case of each of the foregoing clauses, for such matters as would
not, individually or in the aggregate, create a Material Adverse Effect.

         SECTION 5.12      Erisa Benefit Plans. Schedule 5.12 sets forth a list
                           -------------------- -------------
of all material deferred compensation, profit-sharing, retirement and pension
plans and all material bonus and other material employee benefit or fringe
benefit plans maintained, or with respect to which contributions have been made,
by Seller with respect to current or former employees employed in connection
with the power generation operations of the Generating Facilities (collectively,
"Benefit Plans").
 -------------

                                       20
<PAGE>

Seller and each trade or business (whether or not incorporated) which are or
have ever been under common control, or which are or have ever been treated as a
single employer, with Seller under Section 414(b), (c), (m) or (o) of the Code
(an "Erisa Affiliate") have fulfilled their respective obligations under the
     ---------------
minimum funding requirements of Section 302 of ERISA, and Section 412 of the
Code, with respect to each Benefit Plan which is an "employee pension benefit
plan" as defined in Section 3(2) of ERISA and each such plan is in compliance in
all respects with the presently applicable provisions of ERISA and the Code,
except for such failures to fulfill such obligations or comply with such
provisions which would not, individually or in the aggregate, create a Material
Adverse Effect. Neither Seller nor any ERISA Affiliate has incurred any
liability under Section 4062(b) of ERISA, or any withdrawal liability under
Section 4201 of ERISA, to the Pension Benefit Guaranty Corporation in connection
with any Benefit Plan which is subject to Title IV of ERISA which liability
remains outstanding, and there has not been any reportable event (as defined in
Section 4043 of ERISA) with respect to any such Benefit Plan (other than a
reportable event with respect to which the 30-day notice requirement has been
waived by the PBGC). Neither Seller nor any ERISA Affiliate or parent
corporation, within the meaning of Section 4069(b) or Section 4212(c) of ERISA,
has engaged in any transaction, within the meaning of Section 4069(b) or Section
4212(c) of ERISA. No Benefit Plan and no "employee pension benefit plan" (as
defined in Section 3(2) of ERISA) maintained by Seller or any ERISA Affiliate or
to which Seller or any ERISA Affiliate has contributed is a multiemployer plan.

         SECTION 5.13      Taxes. With respect to the Auctioned Assets and
                           -----
trades or businesses associated with the Auctioned Assets, (a) all Tax Returns
required to be filed have been filed and (b) all Taxes shown to be due on such
Tax Returns, and all Taxes otherwise owed, have been paid in full, except to the
extent that any failure to file or any failure to pay any Taxes would not,
individually or in the aggregate, create a Material Adverse Effect. No written
notice of deficiency or assessment has been received from any taxing authority
with respect to liabilities for Taxes of Seller in respect of the Auctioned
Assets which has not been fully paid or finally settled or which is not being
contested in good faith through appropriate proceedings, except for any such
notices regarding Taxes which would not, individually or in the aggregate,
create a Material Adverse Effect. There are no outstanding agreements or waivers
extending the applicable statutory periods of limitation for Taxes associated
with the Auctioned Assets for any period, except for any such agreements or
waivers which would not, individually or in the aggregate, create a Material
Adverse Effect.

         SECTION 5.14      Undisclosed Liabilities. With respect to the
                           -----------------------
Auctioned Assets, there are no liabilities or obligations of any nature or kind
(absolute, accrued, contingent or otherwise) that would have been required to be
set forth on a balance sheet in respect of the Auctioned Assets or in the notes
thereto prepared in

                                       21
<PAGE>

accordance with GAAP, as applied by Seller in connection with its December 31,
1999 balance sheet, except for any such liabilities or obligations which (a) are
disclosed in or contemplated or permitted by this Agreement or the Ancillary
Agreements (including the Assumed Obligations), (b) are disclosed in the
Information Memorandum, (c) are disclosed in the Filed Seller SEC Documents, (d)
have been incurred in the ordinary course of business, or (e) which would not,
individually or in the aggregate, create a Material Adverse Effect.

         SECTION 5.15      Brokers. No broker, finder or other person is
                           -------
entitled to any brokerage fees, commissions or finder's fees in connection with
the transaction contemplated hereby by reason of any action taken by Seller,
except Navigant Consulting, Inc. and Merrill Lynch & Co., which are acting for
and at the expense of Seller.

         SECTION 5.16      Insurance. Seller carries policies of insurance
                           ---------
covering fire, workers' compensation, property all-risk, comprehensive bodily
injury, property damage liability, automobile liability, product liability,
completed operations, explosion, collapse, contractual liability, personal
injury liability and other forms of insurance relating to the Auctioned Assets,
or otherwise self-insures in accordance with all statutory and regulatory
criteria against any such liabilities, which insurance is in such amounts, has
such deductibles and retentions and is underwritten by such companies as would
be obtained by a reasonably prudent electric power business.

         SECTION 5.17      Disclaimers. EXCEPT FOR THE REPRESENTATIONS AND
                           -----------
WARRANTIES EXPRESSLY SET FORTH IN THIS ARTICLE V, THE AUCTIONED ASSETS ARE BEING
SOLD AND TRANSFERRED "AS IS, WHERE IS", AND SELLER IS NOT MAKING ANY OTHER
REPRESENTATIONS OR WARRANTIES WRITTEN OR ORAL, STATUTORY, EXPRESS OR IMPLIED,
CONCERNING SUCH AUCTIONED ASSETS (INCLUDING ANY RELATING TO LIABILITIES,
OPERATIONS OF THE GENERATING FACILITIES, CONDITION, VALUE OR QUALITY OF THE
AUCTIONED ASSETS OR THE PROSPECTS (FINANCIAL OR OTHERWISE), RISKS OR OTHER
INCIDENTS OF THE AUCTIONED ASSETS) OR WITH RESPECT TO THIS AGREEMENT OR THE
ANCILLARY AGREEMENTS OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY. SELLER
SPECIFICALLY DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY, USAGE,
SUITABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE AUCTIONED
ASSETS, OR ANY PART THEREOF, OR AS TO THE WORKMANSHIP THEREOF, OR THE ABSENCE OF
ANY DEFECTS THEREIN, WHETHER LATENT OR PATENT, OR COMPLIANCE WITH ENVIRONMENTAL
REQUIREMENTS, OR THE APPLICABILITY OF ANY GOVERNMENTAL REQUIREMENTS, INCLUDING
BUT NOT LIMITED

                                       22
<PAGE>

TO ANY ENVIRONMENTAL LAWS, OR WHETHER SELLER POSSESSES SUFFICIENT REAL PROPERTY
OR PERSONAL PROPERTY TO OPERATE THE AUCTIONED ASSETS, EXCEPT AS OTHERWISE
EXPRESSLY PROVIDED IN SECTION 5.10 HEREOF, SELLER FURTHER SPECIFICALLY DISCLAIMS
ANY REPRESENTATION OR WARRANTY REGARDING THE ABSENCE OF HAZARDOUS SUBSTANCES OR
LIABILITY OR POTENTIAL LIABILITY ARISING UNDER ENVIRONMENTAL LAWS WITH RESPECT
TO THE AUCTIONED ASSETS, ALL OF WHICH ARE HEREBY EXPRESSLY WAIVED BY BUYER
WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, SELLER MAKES NO REPRESENTATION
OR WARRANTY WITH RESPECT TO THE INFORMATION SET FORTH IN, OR CONTEMPLATED BY,
THE INFORMATION MEMORANDUM.

                                   ARTICLE VI
                                   ----------

                     Representations and Warranties of Buyer
                     ---------------------------------------

         Buyer represents and warrants to Seller as follows:

         SECTION 6.1       Organization. Buyer is a corporation duly
                           ------------
incorporated, validly existing and in good standing under the laws of the State
of Delaware and has all requisite corporate power and authority to own, lease
and operate its properties and to carry on its business as is now being
conducted.

         SECTION 6.2       Authority Relative to This Agreement. Buyer has all
                           ------------------------------------
necessary corporate power and authority to execute and deliver this Agreement
and the Ancillary Agreements to which it is party and to consummate the
transactions contemplated hereby and thereby. The execution and delivery by
Buyer of this Agreement and such Ancillary Agreements and the consummation by
Buyer of the transactions contemplated hereby and thereby have been duly and
validly authorized by the Board of Directors of Buyer and no other corporate
proceedings on the part of Buyer are necessary to authorize this Agreement or
such Ancillary Agreements or the consummation of the transactions contemplated
hereby or thereby. This Agreement and such Ancillary Agreements have been duly
and validly executed and delivered by Buyer and, assuming that this Agreement
and the Ancillary Agreements constitute valid and binding agreements of Seller
and each other party thereto, subject to the receipt of the Buyer Required
Regulatory Approvals and the Seller Required Regulatory Approvals, this
Agreement and the Ancillary Agreements constitute valid and binding agreements
of Buyer, enforceable against Buyer in accordance with their respective terms.

         SECTION 6.3       Consents and Approvals; No Violation.
                           ------------------------------------

                                       23
<PAGE>

         (a) Subject to obtaining the Buyer Required Regulatory Approvals and
the Seller Required Regulatory Approvals, neither the execution and delivery of
this Agreement or the Ancillary Agreements to which it is party by Buyer nor the
consummation of the transactions contemplated hereby or thereby or the purchase
by Buyer of the Auctioned Assets pursuant to this Agreement will (i) conflict
with or result in any breach of any provision of the [Organizational Documents]
of Buyer, (ii) result in a default (or give rise to any right of termination,
cancellation or acceleration) under any of the terms, conditions or provisions
of any note, bond, mortgage, indenture, license, agreement, lease or other
instrument or obligation to which Buyer or any of its subsidiaries is a party or
by which any oft heir respective assets may be bound or (iii) violate any order,
writ, injunction, decree, stature, rule or regulation applicable to Buyer, or
any of its assets, except, in the case of clause (ii) and (iii), for such
failures to obtain a necessary consent, defaults and violations which would not,
individually or in the aggregate, have a Buyer Material Adverse Effect.

         (b) Except for (i) the filings by Buyer and Seller required by the HSR
Act and the expiration or earlier termination of all waiting periods under the
HSR Act, and (ii) the Required Regulatory Approvals set forth on Schedule 6.3(b)
                                                                 ---------------
attached hereto (collectively, the "Buyer Required Regulatory Approvals"), no
                                    -----------------------------------
declaration, fling or registration with, or notice to, or authorization, consent
or approval of any Governmental Authority is necessary for the consummation by
Buyer of the transactions contemplated hereby or by the Ancillary Agreements,
other than such declarations, filings, registrations, notices, authorizations,
consents or approvals which relate to the Transferable Permits.

         SECTION 6.4       Availability of Funds. Buyer has sufficient funds
                           ---------------------
available to it or has received binding written commitments (copies of which
have heretofore been delivered to Seller) from one or more nationally recognized
financial institutions to provide sufficient funds on the Closing Date to pay
the Estimated Purchase Price.

         SECTION 6.5       Brokers. No broker, finder or other person is
                           -------
entitled to any brokerage fees, commissions or finder's fees in connection with
the transaction contemplated hereby by reason of any action taken by Buyer,
except Credit Suisse First Boston Corporation, which is acting for and at the
expense of Buyer.

         SECTION 6.6       No Knowledge of Seller's Breach. Buyer has no
                           -------------------------------
Knowledge of any breach by Seller of any representation or warranty of Seller,
or of any other condition or circumstance that would excuse Buyer from in timely
performance of its obligations hereunder. Buyer shall notify promptly Seller,
with respect to Seller's representations and warranties or such other conditions
or

                                       24
<PAGE>

circumstances, if any such information comes to Buyer's attention prior to the
Closing.

         SECTION 6.7       Qualified Buyer. Buyer is qualified to obtain any
                           ---------------
Permits and Environmental Permits necessary for Buyer to own and operate the
Auctioned Assets as of the Closing Date. Without limiting the foregoing, Buyer
is not aware of any reason or circumstances that would prevent Buyer from
procurring the Buyer Required Regulatory Approvals.

         SECTION 6.8       Warn Act. Buyer does not intent to engage in a "Plant
                           --------
Closing" or "Mass Lay-off" as such terms are defined in the WARN Act within
sixty days of the Closing Date.

         SECTION 6.9       Financial Representations. Buyer has provided Seller
                           -------------------------
with the most recent balance sheet, income statement and statement of changes in
cash flows and independent auditors reports for each of the preceding three
fiscal years and most recent interim period. Such financial statements have been
prepared in accordance with GAAP and fairly reflect the financial position and
results of operations of Buyer as at and for the periods therein.

         SECTION 6.10      Legal Proceedings. There are no claims, actions,
                           -----------------
proceedings or investigations pending or, to the Knowledge of Buyer threatened
against or relating to Buyer before any Governmental Authority which would,
individually or in the aggregate, be reasonably expected to create a Buyer
Material Adverse Effect. Buyer is not subject to any outstanding judgment, rule,
order, writ, injunction or decree of any Governmental Authority which could
create a Buyer Material Adverse Effect.

                                   ARTICLE VII
                                   -----------

                            Covenants of the Parties
                            ------------------------

         SECTION 7.1       Conduct of Business Relating to the Auctioned Assets.
                           ----------------------------------------------------

         (a) Except with the prior written consent of Buyer (such consent not to
be unreasonably withheld) or as required to effect the purchase and sale of the
Auctioned Assets and related transactions contemplated by this Agreement, during
the period from the date of this Agreement to the Closing Date, Seller will
operate the Auctioned Assets in the usual, regular and ordinary course and in
accordance with Good Utility Practices, and continue to pay accounts payable
which relate to the Auctioned Assets in a timely manner, consistent with past
practice.

                                       25
<PAGE>

         (b) Notwithstanding the foregoing, except as contemplated in this
Agreement or the Ancillary Agreements, prior to the Closing Date, without the
prior written consent of Buyer (such consent not to be unreasonably withheld),
Seller will not:

             (i)          except for Permitted Exceptions, grant any Encumbrance
                          on the Auctioned Assets securing any indebtedness for
                          borrowed money or guarantee or other liability for the
                          obligations of any Person;

             (ii)         make any material change in the levels of fuel
                          inventory and supplies, materials and spare parts
                          inventory customarily maintained by Seller with
                          respect to the Auctioned Assets, other than consistent
                          with past practice;

             (iii)        sell, lease (as lessor), transfer or otherwise dispose
                          of, any of the Auctioned Assets, other than assets
                          that become obsolete or assets used, consumed or
                          replaced in the ordinary course of business consistent
                          with past practice;

             (iv)         except as contemplated by Sections 7.9 and 7.17 with
                          respect to the Unassigned PPAs, terminate, materially
                          extend or otherwise materially amend any of the
                          Material Contracts (other than in accordance with
                          their respective terms) or waive any default, by, or
                          release, settle or compromise any material claim
                          against, any other party thereto;

             (v)          amend any of the Transferable Permits, other than (A)
                          Transferable Permits not material to the operations of
                          the Auctioned Assets as currently conducted, (B) as
                          reasonably necessary to complete the transfer of
                          Transferable Permits as contemplated hereby, and (C)
                          routine renewals or non-material modifications or
                          amendments;

             (vi)         enter into any Contract for the purchase, sale or
                          storage of fuel (other than in the ordinary course of
                          business) with respect to the Auctioned Assets
                          (whether commodity or transportation) with a term in
                          excess of 12 months and not terminable on or before
                          the Closing Date either (A) automatically, or (B) by
                          option of Seller (or, after the

                                       26
<PAGE>

                          Closing, by Buyer) it its sole discretion, if the
                          aggregate payments under such commitment for fuel and
                          all other outstanding commitments for fuel (not
                          previously approved by Buyer) would exceed $5,000,000;

             (vii)        except in the case of capital expenditures covered by
                          clause (viii) below, enter into any Contract with
                          respect to the Auctioned Assets for goods or services
                          not addressed in clauses (i) through (vi) with a term
                          in excess of 12 months, if the aggregate future
                          liability or receivable outstanding on the date for
                          measurement for the purpose of this covenant for all
                          such Contracts would be in excess of $1,000,000, not
                          including any such Contract terminable by notice of
                          not more than 30 days without penalty or cost (other
                          than de minimis administrative costs); provided,
                               -- -------                        --------
                          however, that notwithstanding any other provision of
                          -------
                          this Agreement to the contrary, Seller may enter into
                          any Contract reasonably necessary to effect the
                          physical, legal or operational separation of the sites
                          on which the Auctioned Assets are located or to
                          otherwise implement the change of ownership
                          contemplated hereby, or subdivision, of such sites or
                          implement the provisions of the Ancillary Agreements;

             (viii)       make, or commit to make, any capital expenditures
                          except (A) those capital expenditures described on
                          Schedule 7.1(b)(viii), (B) those capital expenditures
                          ---------------------
                          which do not exceed in the aggregate $2,000,000 (in
                          addition to those under capital expenditures permitted
                          under this subsection (viii)), (C) those capital
                          expenditures which are approved by Buyer, or (D) those
                          capital expenditures which are mandated by a law or
                          regulation of a Governmental Authority; provided,
                          however, that, in the case of clause (D), Seller will
                          not make any such mandated capital expenditures
                          (unless the failure by Seller to make such capital
                          expenditures [illegible] Auctioned Assets) if (y) such
                          mandated capital expenditures are not required to be
                          made by Seller prior to the Closing Date, and (z) the
                          Buyer assumes responsibility, at its sole cost, to
                          make such mandated capital expenditures after the
                          Closing (any capital expenditures described above are
                          the "Permitted Capital Expenditures");
                               ------------------------------

                                       27
<PAGE>

             (ix)         enter into any Contract with Affiliates of Seller the
                          term of which arc not indicative of arms-length
                          negotiations;

             (x)          (A) amend any Benefit Plans, or (B) grant any Employee
                          an increase in compensation, except in the ordinary
                          course of business consistent with past practice;

             (xi)         make any tax election with respect to the Auctioned
                          Assets; or

             (xii)        enter into any Contract with respect to the Auctioned
                          Assets relating to any of the transactions set forth
                          in the foregoing clauses (i) through (xi).

         (c) Without limiting the generality of Sections 7.1(a) and (b), to the
extent Section 7.1(a) or (b) prohibits Seller from entering into any Contract
for goods and services in connection with maintenance or capital expenditures,
Buyer agrees that Seller may request Buyer's consent to enter into such
Contract, such consent not to be unreasonably withheld, and to the extent Buyer
so consents, all liabilities and obligations under such Contract shall
constitute Assumed Obligations and Buyer shall otherwise reimburse Seller for
all its expenditures thereunder.

         (d) Notwithstanding anything in this Section 7.1 to the contrary,
Seller may take any action, incur any expense or enter into any obligation with
respect to the Auctioned Assets to the extent that (i) all obligations and
liabilities arising with respect thereto do not continue Assumed Obligations,
(ii) such actions are at Seller's expense and are deemed by Seller to be
necessary, or (iii) Seller otherwise provides that such obligations and
liabilities shall not be assumed or retained by Buyer.

         SECTION 7.2       Access to Information
                           ---------------------

         (a) Between the date of this Agreement and the Closing Date, Seller
will, subject to the Confidentiality Agreement, during ordinary business hours
and upon reasonable notice (i) give Buyer and its representatives reasonable
access to all books, records, personnel, plants, offices and other facilities
and properties constituting the Auctioned Assets, including for the purpose of
observing the operation by Seller of the Auctioned Assets, (ii) permit Buyer to
make such reasonable inspections thereof as Buyer may reasonably request, (iii)
furnish Buyer with such financial and operating data and other information with
respect to the Auctioned Assets as Buyer may from time to time reasonably
request, (iv) furnish

                                       28
<PAGE>

Buyer upon request a copy of each material report, schedule or other document
with respect to the Auctioned Assets filed by Seller with, or received by Seller
from, any PSC or FERC; provided, however, that (A) any such activities shall be
                       --------  -------
conducted in such a manner as not to interfere unreasonably with the operation
of the Auctioned Assets, (B) Seller shall not be required to take any action
which would constitute a waiver of the attorney-client privilege and (C) Seller
need not supply Buyer with (1) any information or access which Seller is under a
legal obligation not to supply or (2) any information which Seller has
previously supplied to Buyer. Notwithstanding anything is this Section 7.2 to
the contrary, (i) Seller will not be required to provide such information or
access to any employee records other than Transferred Employee Records, (ii)
Buyer shall not have the right to perform or conduct any environmental sampling
or testing at, in, on, around or underneath the Auctioned Assets and (iii)
Seller shall not be required to provide such access or information with respect
to any Retained Asset or Retained Liabilities.

         (b) From and after the Closing Date, for a period of no less than 7
years, Buyer shall retain all Operating Records (whether in electronic form or
otherwise) relating to the Auctioned Assets on or prior to the Closing Date.
Buyer also agrees that, from and after the Closing Date, Seller shall have the
right, upon reasonable request to Buyer, to have access to, or receive from
Buyer copies of, any Operating Records or other information in Buyer's
possession relating to the Auctioned Assets on or prior to the Closing Date and
required by Seller in order to comply with applicable law. Seller shall
reimburse Buyer for its reasonable costs and expenses incurred in connection
with the foregoing sentence. If the Buyer shall desire to dispose of any
Operating Records or other information contemplated above, Buyer shall, prior to
such disposition, give Seller a reasonable opportunity to segregate and remove
such records and information as it may select.

         SECTION 7.3       Consents and Approvals; Transferable Permits.
                           --------------------------------------------

         (a) Seller and Buyer shall cooperate with each other and (i) prepare
and file (or otherwise effect) as soon as practicable all applications, notices,
petitions and filings with respect to and (ii) use their reasonable best efforts
to obtain (A) the Seller Required Regulatory Approvals and the Buyer Required
Regulatory Approvals and (B) any other consents, approvals or authorizations of
any other Governmental Authorities or third parties that are necessary to
consummate the transactions contemplated by this Agreement or the Ancillary
Agreements other than such consents, approvals, or authorizations which, if not
obtained or made, would not individually or in the aggregate, create a Material
Adverse Effect. Without limiting the generality of the foregoing, (1) each Party
agrees to, upon the other party's request, support other Party's applications
for regulatory approvals of the purchase and sale of the Auctioned Assets
contemplated by this Agreement, and (2) Buyer and Seller agree to defend any
lawsuits or other legal proceedings,

                                       29
<PAGE>

whether judicial or administrative, challenging this Agreement or the Ancillary
Agreements, or the consummation of the transactions contemplated hereby or
thereby, including seeking to have any stay or temporary restraining order
entered by any Governmental Authority vacated or reversed.

         (b) Upon execution of this Agreement, Seller shall commence the process
of transferring to Buyer the Transferable Permits, including completing and
filing applications and related documents with the appropriate Governmental
Authorities. Seller hereby reserves the right to modify, alter or amend any
Transferable Permit or to refuse to correct violations or deficiencies in
respect of any Transferable Permit as long as such modification, alteration,
amendment or refusal would not, individually or in the aggregate, create a
Material Adverse Effect.

         (c) Seller shall use its reasonable best efforts to cooperate with
Buyer in the transfer of Transferable Permits to Buyer by Closing. If in the
sold discretion of Seller, the transfer of any Transferable Permit cannot be
completed by Closing, Buyer is hereby authorized, but not required, to act as
Seller's representative and agent in respect of such Transferable Permit and to
do all things necessary for effecting transfer of such Transferable Permit as
soon after the Closing as is practicable, with Seller remaining the Transferable
Permit "holder of record" in such case until such transfer is completed. In the
case of each such Transferable Permit, Seller shall, to the maximum extent
permitted by law and such Transferable Permit, enter into such reasonable
arrangements with Buyer as are necessary to provide Buyer with the benefits and
obligations of such Transferable Permit. If in the sole discretion of Seller,
Buyer is able to complete the transfer of the Transferable Permit after Closing
without the occurrence of any event that, if such event had occurred between the
execution of this Agreement and the Closing, would have created, individually or
in the aggregate, a Material Adverse Effect, Seller may substitute Buyer in its
place and stead as the Party responsible for completing the transfer of such
Transferable Permit.

         SECTION 7.4       Further Assurances. Subject to the terms and
                           ------------------
conditions of this Agreement, each of the Parties will use its reasonable best
efforts to take, or cause to be taken, as soon as possible, all action, and to
do, or cause to be done, as soon as possible, all things necessary, proper or
advisable under applicable laws and regulations to consummate the sale of the
Auctioned Assets pursuant to this Agreement as soon as possible, including using
its reasonable best efforts to ensure satisfaction of the conditions precedent
to each Party's obligations hereunder. Prior to Buyer's submission of any
applications with a Governmental Authority for a regulatory approval, Buyer
shall submit such application to Seller for review and comment and Buyer shall
incorporate into such application any revisions reasonably requested by Seller.
Neither of the Parties will, without prior written consent of the other Party,
take or fail to take, or permit their respective Affiliates to take or fail to

                                       30
<PAGE>

take, any action, which would reasonably be expected to prevent or materially
impede, interfere with or delay the consummation, as soon as possible, of the
transactions contemplated by this Agreement or the Ancillary Agreements.

         SECTION 7.5       Public Statements. The Parties shall consult with
                           -----------------
each other prior to issuing any public announcement, statement or other
disclosure with respect to this Agreement, the Ancillary Agreements or the
transactions contemplated hereby or thereby, and shall not issue any such public
announcement, statement or other disclosure prior to such consultation, except
as may be required by law.

         SECTION 7.6       Tax Matters.
                           -----------

         (a) All transfer and sales taxes (including (i) sales tax on the sale
or purchase of the Auctioned Assets imposed by Governmental Authorities, (ii)
transfer tax on the conveyance of interest in real property imposed by
Governmental Authorities, (iii) any petroleum business taxes and similar excise
taxes on sales of petroleum based products imposed by Governmental Authorities)
incurred in connection with this Agreement and the transactions contemplated
hereby shall be borne by Buyer. Buyer shall prepare and file in a timely manner
any and all Tax Returns or documentation relating to such taxes; provided,
                                                                 --------
however, that, to the extent required by applicable law, Seller will join in the
-------
execution of any such Tax Returns or other documentation relating to any such
taxes. Buyer shall provide to Seller copies of each Tax Return described in the
proviso in the preceding sentence at least 30 days prior to the date such Tax
Return is required to be filed.

         (b) At Seller's election, but not less than 10 Business Days' notice to
Buyer, the transfer of some or all of the Auctioned Assets and the receipt of
the amount payable by Buyer to Seller pursuant to Section 3.1 hereof shall be
made through a qualified intermediary in a manner satisfying the requirements of
Treasury Regulation Section 1.1031(k)-l(g); provided, however, that Seller shall
pay and be responsible for any incremental costs associated with such use of a
qualified intermediary.

         SECTION 7.7       Bulk Sales or Transfer Laws. Buyer acknowledges that
                           ---------------------------
Seller will not comply with the provisions of any bulk sales or transfer laws of
any jurisdiction in connection with the transactions contemplated by this
Agreement. Buyer hereby waives compliance by Seller with the provisions of the
bulk sales or transfer laws of all applicable jurisdictions.

         SECTION 7.8       Witness Services. At all time from and after the
                           ----------------
Closing Date, each Party shall use reasonable best efforts to make available to
the other

                                       31
<PAGE>

Party, upon reasonable written request, its and its subsidiaries' then current
or former officers, directors, employees (including former employees of Seller)
and agents as witnesses to the extent that (i) such persons may reasonably be
required by such requesting Party in connection with any claim, action,
proceeding or investigation in which such requesting Party may be involved and
(ii) there is no conflict between Buyer and Seller in such claim, action,
proceeding or investigation. Such other Party shall be entitled to receive from
such requesting Party, upon the presentation of invoices for such witness
services, payments for such amounts, relating to supplies, disbursements and
other out-of-pocket expenses and direct and indirect costs of employees who are
witness, as may be reasonably incurred in providing such witness services.

         SECTION 7.9       Control of Litigation. The Buyer and Seller agree and
                           ---------------------
acknowledge that Seller shall be entitled exclusively to control, defend and
settle any litigation, administrative or regulatory proceeding, and any
investigation or remediation activity arising out of or related to any
Unassigned PPAs, Retained Assets or Retained Liabilities, and Buyer agrees to
cooperate fully in connection therewith. Without Buyer's prior written consent,
Seller shall not settle any litigation, administrative or regulatory proceeding
relating to the Unassigned PPA that would result in a material effect on the
rights of Buyer hereunder. Buyer and Seller agree and acknowledge that Buyer
shall be entitled to participate at its expense and assume control of any
litigation, administrative or regulatory proceeding, exclusively arising out of
or related to any Assumed Obligations, and Seller agrees to cooperate fully in
connection therewith. Anything contained in this Agreement to the contrary
notwithstanding, no Party shall be entitled to assume the defense of any
litigation, administrative or regulatory proceeding or investigation if such
litigation, administrative or regulatory proceeding or investigation seeks an
order, injunction or other equitable relief for other than monetary damages
against the other Party which, if successful, would materially adversely affect
the business of such other Party.

         SECTION 7.10      Confidentiality. Buyer hereby agrees to comply with
                           ---------------
its obligations to keep confidential certain information in accordance with the
terms set forth in the Confidentiality Agreement.

         SECTION 7.11      Risk of Loss.
                           ------------

         (a) Except as otherwise provided for in this Section 7.11, from the
date hereof through the Closing Date, all risk of loss or damage to the assets
and properties included in the Auctioned Assets shall be borne by Seller (other
than loss or damage caused by the acts or negligence of Buyer or any of its
employees, officers, agents or representatives, which loss or damage shall be
the responsibility of Buyer).

                                       32
<PAGE>

         (b) If, before the Closing Date, all or any portion of the Auctioned
Assets are (1) taken by eminent domain or are the subject of a pending or (to
the Knowledge of the Seller) contemplated taking which has not been consummated,
or (2) damaged or destroyed by fire or other casualty, Seller shall notify Buyer
promptly in writing of such fact. If the fair market value of the Auctioned
Assets that are the subject of, or are adversely affected by, such taking or
loss is one percent (1%) or less of the fair market value of the Auctioned
Assets (as estimated in good faith by Seller), Buyer and Seller agree that such
taking or loss shall not have any effect on (or otherwise impede in any manner)
the transaction contemplated hereby, and Buyer shall be entitled to an
assignment of all of Seller's right, title and interest in and to any related
award or insurance proceeds. If (1) the fair market value of the Auctioned
Assets that are the subject of, are adversely affected by such taking or loss is
in excess of one percent (1%) of the fair market value of the Auctioned Assets
(as estimated in good faith by Seller in accordance with the preceding sentence)
and (2) Seller has not notified Buyer of its intention to cure such taking or
loss within 30 days after is occurrence, Buyer and Seller shall negotiate in
good faith a fair and equitable adjustment to the Purchase Price and, upon such
settlement, consummate the transactions contemplated by this Agreement pursuant
to the terms of this Agreement. If no such settlement is reached within 60 days
after Seller has notified Buyer of such taking or casualty, Buyer or Seller may
terminate this Agreement pursuant to Section 11.1.

         SECTION 7.12      Tax Exempt Financing.
                           --------------------

         (a) Buyer understands and agrees that:

             (i)          those certain facilities of the Seller listed on
                          Schedule 7.12 attached hereto (the "Exempt
                          -------------                       ------
                          Facilities") have been financed, and refinanced, in
                          ----------
                          whole or in part, with the proceeds of the issuance
                          and sale by various Governmental Authorities of
                          industrial development revenue bonds or private
                          activity bonds as set forth on Schedule 7.12 attached
                                                         -------------
                          hereto (collectively, the "Revenue Bonds") the
                                                     -------------
                          interest on which, with certain exceptions, is
                          excluded from gross income for purposes of federal
                          income taxation; and Seller is the economic obligor in
                          respect of such bonds;

             (ii)         The basis for such exclusion is the use of the Exempt
                          Facilities for the purpose of (A) the abatement or
                          control of atmospheric or water pollution or
                          contamination and/or (B) the collection, storage,
                          treatment, utilization, processing or final disposal
                          of solid waste and/or (C) the collection, storage,
                          treatment, utilization, processing or

                                       33
<PAGE>

                          final disposal of sewage, such qualifying purposes
                          being discussed in more detail in (b) below;

             (iii)        The use of the Exempt Facilities for a purpose other
                          than a qualifying purpose indicated in subsection (ii)
                          above could impair (A) such exclusion from gross
                          income of the interest on such bonds, possibly with
                          retroactive effect, unless appropriate remedial action
                          were taken (which could include prompt defeasance or
                          redemption of such bonds) and/or (B) the deductibility
                          of payment by Seller of interest on the restrictions
                          in Section 150 (b) of the Code; and

             (iv)         Any breach by Buyer of its obligations under this
                          Section 7.12 could result in the incurrence by Seller
                          of additional costs and expenses, including without
                          limitation, increased interest costs, loss of the
                          interest deduction for tax purposes and transaction
                          costs relating to any refinancing, redemption and/or
                          defeasance of all or part of the Revenue Bonds, and
                          Buyer will be liable to Seller for such additional
                          costs and expenses.

         (b) i) Buyer agrees that it shall not use, or permit the use of, the
Exempt Facilities for any purpose other than the continuing use of such Exempt
Facilities for

                                       (A) abating or controlling atmospheric or
                          water pollution or contamination by removing,
                          altering, disposing of or storing pollutants,
                          contaminants, waste or heat, all as contemplated in
                          U.S. Treasury Regulations Section 1.103-8(g);

                                       (B) the collection, storage, treatment,
                          utilization, processing or final disposal of solid
                          waste, all as contemplated in U.S. Treasury
                          Regulations Section 1.103-8(f); or

                                       (C) the collection, storage, treatment,
                          utilization, processing or final disposal of sewage,
                          all as contemplated in U.S. Treasury Regulations
                          Section 1.103-8(f)

                                       34
<PAGE>

unless Buyer has obtained at its expense an opinion addressed to Seller of
nationally recognized bond counsel reasonably acceptable to Seller ("Bond
                                                                     ----
Counsel") that such use will not impair (x) the exclusion from gross income of
-------
the interest on any issue of Revenue Bonds for Federal income tax purposes or
(y) the deductibility of Seller's payments of interest based on the restrictions
in Section 150(b) of the Code.

         (ii) Buyer reasonably expects, as of the date of this Agreement, that
the Exempt Facilities will continue to be used for the qualifying purposes set
forth in subsection (i) above, and for no other purpose, for the remainder of
their useful lives.

         (c) It is expressly understood and agreed that the provisions of clause
(b) above shall not prohibit Buyer from (i) suspending the operation of the
Exempt Facilities on a temporary basis, and/or (ii) selling exclusively for cash
Exempt Facilities consisting of personal property, in whole or in part,
including any sale for scrap, provided that the operation of the Generating
Plant served by such Exempt Facilities shall not therefore have been, and is not
then being, terminated on a permanent basis, and provided further that the
proceeds of such sale of the Exempt Facilities shall within six months from the
date of sale be expended to acquire replacement property to be used for the same
qualifying purpose as the Exempt Facilities so sold, and/or (iii) and other
suspension or termination of operation or sale, exchange, transfer or other
disposition of Exempt Facilities, provided that Buyer has obtained at its own
expense an opinion addressed to Seller of Bond Counsel that the failure to take
this action will not impair (x) the exclusion from gross income of the interest
on any issue of Revenue Bonds for Federal income tax purposes or (y) the
deductibility of Seller's payments of interest based on the restrictions in
Section 150(b) of the Code.

         (d) Buyer agrees that it shall not issue, or have issued on its behalf,
any tax-exempt bonds to finance or refinance its acquisition of the Exempt
Facilities; provided that it is expressly understood and agreed that this clause
(d) shall not prohibit the use of tax-exempt bonds to finance or refinance any
improvements to the Exempt Facilities made after the date of acquisition or to
any assets other than the Exempt Facilities.

         (e) Buyer agrees that it shall give Seller at least 180 days' prior
written notice of any suspension or termination of the operation of the Exempt
Facilities, or any part thereof, and of any sale, exchange, transfer or other
disposition of the Exempt Facilities, or any part thereof, including, but not
limited to, a sale for scrap, such written notice to be provided whether or not
an opinion of Bond Counsel is required to be obtained in accordance with clause
(c).

                                       35
<PAGE>

         (f) If Seller shall desire to refund any Revenue Bonds, Buyer shall
cooperate with Seller and with Bond Counsel with respect to such refunding bonds
and shall provide upon request any representations, agreements or covenants that
are reasonably requested concerning its compliance to such date and/or in the
future with the representations, agreements and covenants made herein.

         (g) If Buyer shall sell, exchange, transfer or otherwise dispose of the
Exempt Facilities to a third party, Buyer shall cause to be included in the
documentation relating to such transaction covenants and agreements on the part
of such third party for the benefit of the Seller, and as requested by the
Seller, the trustee for the holders of any Revenue Bonds substantially identical
to those on the part of Buyer contained in this Section 7.12.

         (h) The covenants and agreements on the part of Buyer contained in this
Section 7.12 shall continue in effect so long as any of the Revenue Bonds,
including any refunding bonds issued hereafter to refund any Revenue Bonds,
shall remain outstanding. Seller shall notify Buyer promptly when there shall be
no Revenue Bonds outstanding and, at the request of the Seller, the Buyer shall
execute further documentation to provide that such covenants and agreements are
also for the benefit of the trustee for the holders of any Revenue Bonds.

         (i) Notwithstanding any provision in this Agreement to the contrary,
from and after the Closing Date, Seller agrees that it will remain primarily
liable for, and promptly pay when due, all obligations to pay principal and
interest under the Loan Agreements.

         SECTION 7.13      Compliance with Governmental Agreements. From and
                           ---------------------------------------
after the Closing Date, Buyer agrees that it will abide by, and comply with, all
existing permit conditions, provisions in the Certificates of Public Convenience
and Necessity issued to the Seller by any PSC, and any other agreements or
arrangements between the Seller and the District of Columbia or the State of
Maryland (or any political subdivision thereof), including provisions or
agreements relating to environmental compliance and mitigation.

         SECTION 7.14      PJM; MAAC. From and after the Closing Date, Buyer
                           ---------
shall maintain membership in good standing in PJM and MAAC, and shall submit to
the governance of the independent system operator established and administered
under the PJM Agreement.

         SECTION 7.15      Trade Names. Seller shall not object to the use by
                           -----------
Buyer of any trade names, trademarks, service marks or logos (and any rights to
and in the same, including any right to use the same) which are not Retained
Assets in

                                       36
<PAGE>

connection with its ownership and operation of the Generating Facilities. In
addition, Buyer hereby acknowledges the right of Seller to use such trade names,
trademarks, service marks or logos in connection with Seller's ownership and
operation of the Retained Assets.

         SECTION 7.16      Enforcement of Retained Rights. Notwithstanding any
                           ------------------------------
provision of the Agreement to the contrary, Seller shall be entitled to enforce
all rights and remedies in respect of the Retained Rights in accordance with the
terms and conditions of each PPA, including termination of interconnection and
related services to the applicable Power Seller.

         SECTION 7.17      Conduct of Business Relating to PPAs. Prior to
                           -------------------------------------
Closing, except as expressly contemplated by this Agreement, required by the
terms of any PPA or consented to by Buyer (which shall not be unreasonably
withheld), Seller shall not amend, modify or extend any PPA, or waive
performance of the obligations of any party thereunder, which, would have a
material adverse effect on the rights of Buyer hereunder.

                                  ARTICLE VIII
                                  ------------

                                   Conditions
                                   ----------

         SECTION 8.1       Conditions Precedent to Each Party's Obligation to
                           --------------------------------------------------
Effect the Purchase and Sale. The respective obligations of each Party to effect
----------------------------
the purchase and sale of the Auctioned Assets shall be subject to the
satisfaction or waiver by such Party on or prior to the Closing Date of the
following conditions:

         (a) all Seller Required Regulatory Approvals and Buyer Required
Regulatory Approvals shall have been obtained by Seller and Buyer, as the case
may be, and all conditions to effectiveness prescribed therein or otherwise by
law, regulation or order shall have been satisfied by such Parties; provided,
that the Seller will not be required to close if any Seller Required Regulatory
Approval contains terms and conditions that create a Regulatory Material Adverse
Effect;

         (b) no preliminary or permanent injunction or other order or decree by
any Federal or state court of competent jurisdiction and no statute or
regulation enacted by any Governmental Authority prohibiting the consummation of
the purchase and sale of the Auctioned Assets (collectively, "Restraints") shall
                                                              ----------
be in effect; and

         (c) the execution and delivery of each Ancillary Agreement, by each
Party thereto.

                                       37
<PAGE>

         SECTION 8.2       Conditions Precedent to Obligation of Buyer to Effect
                           -----------------------------------------------------
the Purchase and Sale. The obligation of Buyer to effect the purchase and sale
---------------------
of the Auctioned Assets contemplated by this Agreement shall be subject to the
satisfaction or waiver by Buyer on or prior to the Closing Date of the following
additional conditions:

         (a) Seller shall have performed its covenants and agreements contained
in this Agreement which are required to be performed on or prior to the Closing
Date, except where the failure to perform such covenants and agreements would
not, individually or in the aggregate, create a Material Adverse Effect;

         (b) the representations and warranties of Seller which are set forth in
this Agreement shall be true and correct as of the date of this Agreement and as
of the Closing Date, as if made at and as of such time (except to the extent
expressly made as of an earlier date, in which case as of such date), except
where the failure of such representations and warranties to be so true and
correct (without giving effect to any limitation as to "materiality" or
"Material Adverse Effect" set forth therein) would not, individually or in the
aggregate, create a Material Adverse Effect;

         (c) Buyer shall have received a certificate from an authorized officer
of Seller, dated the Closing Date, to the effect that, to the best of such
officer's Knowledge, the conditions set forth in Section 8.2(a) and (b) have
been satisfied;

         (d) all material Permits and Environmental Permits required for Buyer
to conduct the business and operations of the Auctioned Assets as currently
conducted shall have been transferred or will be transferable to Buyer, or shall
have been obtained or will be obtained by Buyer, except where the failure to
obtain such material Permits or Environmental Permits will not have,
individually or in the aggregate, a Material Adverse Effect;

         (e) Buyer shall have received (i) the deeds of conveyance substantially
in the form of Exhibit J, and (ii) an opinion from Dickstein Shapiro Morin &
               ---------
Oshinsky LLP or other counsel reasonably acceptable to Buyer, dated the Closing
Date, and reasonably satisfactory in form and substance to Buyer covering the
matters set forth in Exhibit K;
                     ---------

         (f) Buyer shall have received a Foreign Investment in Real Property Tax
Act Certification and Affidavit, executed by Seller; and

         (g) Seller shall have delivered to Buyer all such other instruments as
shall, in the reasonable opinion of the Buyer and its counsel, be (i) necessary
to transfer to

                                       38
<PAGE>

Buyer the Auctioned Assets in accordance with this Agreement or (ii) required to
consummate the transactions contemplated by this Agreement.

         SECTION 8.3       Conditions Precedent to Obligation of Seller To
                           -----------------------------------------------
Effect the Purchase and Sale. The obligation of Seller to effect the purchase
----------------------------
and the sale of the Auctioned Assets contemplated by this Agreement shall be
subject to the satisfaction or waiver by Seller on or prior to the Closing Date
of the following additional conditions:

         (a) Buyer shall have performed its covenants and agreements contained
in this Agreement which are required to be performed on or prior to the Closing
Date, except where the failure to perform such covenants and agreements would
not, individually or in the aggregate, create a Buyer Material Adverse Effect;

         (b) the representations and warranties of Buyer which are set forth in
this Agreement shall be true and correct as of the date of this Agreement and as
of the Closing Date, as if made at and as of such time (except to the extent
expressly made as of an earlier date, in which case as of such date), except
where the failure of such representations and warranties to be so true and
correct (without giving effect to any limitation as to "materiality" or "Buyer
Material Adverse Effect" set forth therein) would not, individually or in the
aggregate, create a Buyer Material Adverse Effect;

         (c) Seller shall have received a certificate from an authorized officer
of Buyer, dated the Closing Date, to the effect that, to the best of such
officer's Knowledge, the conditions set forth in Section 8.3(a) and (b) have
been satisfied;

         (d) Seller shall have received an opinion from Troutman Sanders LLP or
other counsel reasonably acceptable to Seller, dated the Closing Date, and
reasonably satisfactory in form and substance to Seller covering the matters set
forth in Exhibit L;

         (e) Buyer shall have provided evidence in form and substance reasonably
satisfactory to Seller of compliance by Buyer with its obligations under Article
IX (including, without limitation, a certificate from an authorized officer of
Buyer, dated the Closing Date, which identifies the Non-Union Employees who did
not receive from the Buyer a Qualified Offer pursuant to Section 9.1(d));

         (f) If a Guarantee Agreement has been entered into:

             (i)          the Guarantee Agreement shall be in full force and
                          effect;

                                       39
<PAGE>

             (ii)         the Guarantor shall have performed in all material
                          respects its covenants and agreements contained in the
                          Guarantee Agreement which are required to be performed
                          on or prior to the Closing Date;

             (iii)        the representations and warranties of the Guarantor
                          which are set forth in the Guarantee Agreement shall
                          be true and correct as of the date of the Guarantee
                          Agreement and as of the Closing Date, as if made at
                          and as of such time (except to the extent expressly
                          made as of an earlier date, in which case as of such
                          date), except where the failure of such
                          representations and warranties to be so true and
                          correct (without giving effect to any limitation as to
                          "materiality or "Guarantor Material Adverse Effect"
                          set forth therein) would not, individually or in the
                          aggregate, create a Guarantor Material Adverse Effect
                          (as defined therein);

             (iv)         Seller shall have received a certificate from an
                          authorized officer of the Guarantor, dated the Closing
                          Date, to the effect that, to the best of such
                          officer's Knowledge, the conditions set forth in
                          Sections 8.3(f)(ii) and (iii) have been satisfied;

             (v)          Seller shall have received an opinion from Troutman
                          Sanders LLP or other counsel reasonably acceptable to
                          Seller, dated the Closing Date, and reasonably
                          satisfactory in form and substance to Seller covering
                          the matters set forth in Exhibit M.

         (g) Buyer shall have delivered to Seller all such other instruments as
shall, in the reasonable opinion of the Seller and its counsel, be (i) necessary
for the Buyer to assume the Assumed Obligations in accordance with this
Agreement or (ii) required to consummate the transactions contemplated by the
Agreement.

         (h) Panda shall have consented to a Novation of the Panda PPA
satisfactory in form and substance to Seller, or Seller shall have received an
order from the MDPSC determining that the transactions contemplated by Section
II of Schedule 2.4 hereto with respect to the Panda PPA do not violate the Panda
      ------------
PPA, which order shall have become final and non-appealable, and which is
satisfactory in form and substance to Seller.

                                       40
<PAGE>

                                   ARTICLE IX
                                   ----------

                                Employee Matters
                                ----------------

         SECTION 9.1       Employee Matters.
                           ----------------

         (a) Buyer shall offer employment, effective as of the Closing Date, to
all employees of Seller employed at the Generating Facilities and the Support
Operations as of the Closing Date who are covered by the IBEW Collective
Bargaining Agreement, including those employees absent from active service due
to illness or leave of absence, whether paid or unpaid, other than those
employees on long term disability as of the Closing Date who have received
written notice from Seller approving requests for long term disability as of the
Closing Date (the "Union Employees"), pursuant to and in accordance with the
                   ---------------
IBEW Collective Bargaining Agreement and applicable law. Each Union Employee who
becomes employed by Buyer pursuant to this Section 9.1(a) is referred to herein
as a "Transferred Union Employee".
      --------------------------

         (b) Any Union Employee who refuses an offer of employment from Buyer
made in accordance with the terms of this Section 9.1 shall be treated by Seller
as a terminated employee and shall not be entitled to any severance or other
benefits from Buyer in connection therewith.

         (c) Buyer shall provide benefits to Transferred Union Employees
substantially equivalent to those provided under the IBEW Collective Bargaining
Agreement. In doing so, Buyer may use different providers, establish its own
benefit plans or use its existing plans. There shall be no duplication of
benefits. Buyer shall recognize service with Seller for purposes of eligibility
and vesting and benefit calculations in any benefit plan, program, or fringe
benefit arrangement. For purposes of health care coverage, Buyer shall waive all
limitations regarding preexisting condition exclusions, actively at work
exclusions and waiting periods for Transferred Union Employees. During the
calendar year in which Closing occurs, all health care expenses incurred by
Transferred Union Employees that were qualified to be taken into account for
purposes of satisfying any deductible or out-of-pocket limit under Seller's
health care plans shall be taken into account for purposes of satisfying any
deductible or out-of-pocket limit under Buyer's health care plans for such
calendar year. Buyer shall give all Transferred Union Employees full credit for
all vacation, sick leave or comp time benefits accrued and not used as of the
Closing. The Buyer shall provide substantially equivalent retiree medical
benefits to the Transferred Union Employees only with no duplication of benefits
and such benefits shall be subject to any limitations in existing plan documents
and the IBEW Collective Bargaining Agreement and related documents.

                                       41
<PAGE>

         (d) Buyer may but shall not be required to, offer employment, effective
as of the Closing Date, to employees of Seller (other than Union Employees) who
are (i) employed at the Generating Facilities or (ii) corporate support
personnel engaged in the Support Operations (collectively, the "Non-Union
                                                                ---------
Employees" and, together with Union Employees, "Employees"). Within sixty (60)
---------                                       ---------
days after the date hereof, Buyer shall notify Seller as to the identity of
those Non-Union Employees to whom it intends to offer employment, provided that,
during such period, Seller shall, upon reasonable notice and to the extent not
disruptive to the operation of the Auctioned Assets, provide Buyer with
reasonable access to Non-Union Employees and, to the extent permitted by
applicable law, their respective Transferred Employee Records. In the event that
Buyer does not make a Qualified Offer to any Non-Union Employees, the Buyer
shall be solely responsible for the payment to such Non-Union Employees of all
severance costs payable under the Seller's 1998 Reorganization Severance Plan
(treating the consummation of the sale of the Auctioned Assets hereunder as an
event entitling such Non-Union Employee to severance benefits thereunder). The
Buyer shall have no other obligations with respect to any Non-Union Employees to
which it does not make a Qualified Offer. Each Non-Union Employee who becomes
employed by Buyer pursuant to this Section 9.1(d) shall be referred to herein as
a "Transferred Non-Union Employee" and, together with Transferred Union
   ------------------------------
Employees, the "Transferred Employees." Any offer of employment to a Non-Union
                ---------------------
Employee that satisfies all of the following requirements is referred to herein
as a "Qualified Offer":
      ---------------

         (1) Buyer shall pay and provide such Transferred Non-Union Employee
annual compensation, bonus and other incentive opportunities (the "Total Cash
                                                                   ----------
Compensation") at a rate substantially equivalent to such Transferred Non-Union
------------
Employee's Total Cash Compensation in the most recent calendar year ending prior
to the Closing (which shall include cash compensation in respect of such
calendar year paid or payable after such calendar year).

         (2) The location of such Transferred Non-Union Employee's workplace
must be within a fifty (50) mile radius of the District of Columbia metropolitan
area; provided, however, that if any Non-Union Employee's commute to the Buyer's
workplace following the Closing will be increased by more than fifty (50) miles
(as compared to the number of miles traveled by such Non-Union Employee to the
Seller's work place immediately prior to the Closing), the Buyer shall be
required to pay such Non-Union Employee a $3,500 relocation allowance.

         (e) Buyer shall provide benefits to Transferred Non-Union Employees
substantially equivalent to those provided by Seller as of the Closing Date. In
doing so, Buyer may use different providers, establish its own benefit plans or
use its existing plans. There shall be no duplication of benefits. Buyer shall
recognize service with Seller for purposes of eligibility and vesting and
benefit calculations in

                                       42
<PAGE>

any benefit plan, program, or fringe benefit arrangement. For purposes of health
care coverage, Buyer shall waive all limitations regarding pre-existing
condition exclusions, actively at work exclusions and waiting periods for
Transferred Non-Union Employees. During the calendar year in which Closing
occurs, all health care expenses incurred by Transferred Non-Union Employees
that were qualified to be taken into account for purposes of satisfying any
deductible or out-of-pocket limit under Seller's health care plans shall be
taken into account for purposes of satisfying any deductible or out-of-pocket
limit under Buyer's health care plans for such calendar year. Buyer shall give
all Transferred Non-Union Employees full credit for all vacation, sick leave or
comp time benefits accrued and not used as of the Closing. The Buyer shall
provide substantially equivalent retiree medical benefits to the Transferred
Non-Union Employees only with no duplication of benefits and such benefits shall
be subject to any limitations in existing plan documents.

         SECTION 9.2       Pension Plans. With respect to each Transferred
                           -------------
Employee's accrued benefit (based on service and compensation as of the Closing
Date) (the "Closing Date Benefits"), Seller shall, effective as of the Closing
            ---------------------
Date, amend the General Retirement Plan ("Seller's Pension Plan") to (i)
                                          ---------------------
recognize service with Buyer for purposes of vesting the Closing Date Benefits
in such Seller's Pension Plan; (ii) recognize service with Buyer toward
eligibility for receipt of subsidized early retirement and optional benefit
forms with respect to the Closing Date Benefits under Seller's Pension Plan;
(iii) provide that retirement from Buyer's service shall be deemed retirement
from active employment with Seller for purposes of eligibility for receipt of
subsidized early retirement and optional benefit forms with respect to the
Closing Date Benefits under Seller's Pension Plan; and (iv) provide that Closing
Date Benefits cannot commence until the earlier of such Transferred Employee's
actual retirement from Buyer's employment or attainment of age 65. The pension
plan of Buyer ("Buyer's Pension Plan") shall recognize all prior service with
                --------------------
Seller for purposes of eligibility for participation, vesting, early retirement
subsidies and benefit accrual for Transferred Employees, and may offset the
Closing Date Benefits from benefit accruals thereunder. Buyer and Seller shall
provide each other with such records and information as may be necessary or
appropriate to carry out their respective obligations under this Section 9.2 for
the purposes of administration of Buyer's Pension Plan and Seller's Pension
Plan.

         SECTION 9.3       Buyer's Savings Plan. As soon as practicable, and in
                           --------------------
any event within 90 days after the Closing Date, Buyer shall establish a defined
contribution pension plan (or plans) and trust (or trusts) intended to qualify
under Sections 401(a) and 501(a) of the Code or amend an existing plan or plans
satisfying such requirements (such plan or plans referred to as "Buyer's Savings
                                                                 ---------------
Plan") in which all Transferred Employees shall be eligible to participate as of
----
the later of the Closing Date or the Buyer's Savings Plan's effective date.
Buyer's Savings Plan shall provide for deferral options and employer matching
contributions

                                       43
<PAGE>

with respect to the Transferred Employees who are participants (or eligible to
be participants) in the Potomac Electric Power Company Savings Plan ("Seller's
                                                                      --------
Savings Plan") as of the Closing Date (such employees, the "Transferred Savings
------------                                                -------------------
Employees") that are no less favorable than those provided immediately prior to
---------
the Closing Date to the Transferred Savings Employees under Seller's Savings
Plans (including an opportunity to make up for any lost deferrals and/or
employer matching contributions that were unavailable because of a delay between
the Closing Date and the effective date of Buyer's Savings Plan). Contributions
to the Seller's Savings Plans with respect to the Transferred Savings Employees
shall cease effective as of the Closing Date. Each Transferred Savings Employee
shall be afforded the option of transferring his or her account balance into the
Buyer's Savings Plan, including any outstanding loan balances attributable to
such accounts provided, however, that if Seller is able to obtain a favorable
ruling from the Internal Revenue Service to the effect that the consummation of
the transactions contemplated hereby shall constitute a sale of substantially
all of the assets used in a trade or business within the meaning of Section
401(k)(10) of the Code, or that there has been a separation from service as a
non-continuation of the same trade or business within the meaning of Section
401(k)(2)(B)(i)(I) of the Code, each Transferred Savings Employee shall be
afforded the option of maintaining his or her account balance under Seller's
Savings Plan, rolling over his or her account balance, including any outstanding
loan balances attributable to such accounts into the Buyer's Savings Plan,
rolling over his or her account balance into an individual retirement account or
cashing in his or her account balance (subject to applicable withholding taxes
and penalties). Any such transfers or rollovers shall satisfy the requirements
of Section 414(1) of the Code and Section 208 of ERISA and shall be in the form
of cash or other property, as Seller and Buyer shall mutually agree prior to
such transfer or rollover (which Buyer agrees shall include promissory notes
evidencing loans from Seller's Savings Plan to Transferred Savings Employees
that are outstanding on the Closing Date). Prior to such transfer or rollover,
Buyer will provide Seller with such documents and other information as Seller
shall reasonably request to assure itself that Buyer's Savings Plan and the
trust or trusts established pursuant thereto (i) provide for voluntary
participant after-tax contributions and (ii) contain participant loan provisions
and procedures necessary to effect the orderly transfer of participant loan
balances associated with the transfer or rollover. In the event that a
Transferred Savings Employee shall elect to leave his or her account balance in
Seller's Savings Plans, Buyer shall cooperate with Seller in providing that any
outstanding loan attributable to such account balance shall be repaid through
payroll deductions from Buyer's payroll. Upon such transfer, Buyer's Savings
Plan shall assume all liabilities and obligations whatsoever with respect to all
amounts transferred from Seller's Savings Plan to Buyer's Savings Plan in
respect of the Transferred Savings Employees and Seller and its Affiliates and
Seller's Savings Plan shall be relieved of all such liabilities and obligations.
Notwithstanding anything in this Article IX to the contrary, no such transfer or
rollover shall take place unless and until Seller has received written evidence
of the adoption of Buyer's Savings Plan

                                       44
<PAGE>

and the trust (or trusts) thereunder by Buyer and either (A) a copy of a
favorable determination letter issued by the Internal Revenue Service and
satisfactory to Seller's counsel with respect to Buyer's Savings Plan or (B) an
opinion, satisfactory to Seller's counsel, of Buyer's counsel to the effect that
the terms of Buyer's Savings Plan and its related trust or trusts qualify under
Sections 401(a) and 501(a) of the Code. Buyer and Seller shall provide each
other with such records and information as may be necessary or appropriate to
carry out their obligations under this Section 9.3 for the purposes of
administration of Buyer's Savings Plan, and they shall cooperate in the filing
of documents required by the transactions described herein.

         SECTION 9.4       Severance Liabilities. Buyer shall provide severance
                           ---------------------
benefits (i) as contemplated by Schedule 1.1(C) attached hereto, and (ii) as set
                                ---------------
forth in Seller's 1998 Reorganization Severance Plan (treating the consummation
of the sale of the Auctioned Assets hereunder and the events specified in this
Section as events entitling such Non-Union Employee to severance benefits
thereunder) to any Transferred Non-Union Employee (i) who, within the 12-month
period immediately following the Closing Date, is terminated by Buyer or any of
its Affiliates other than for cause (as defined on Schedule 1.1(c)) or (ii) with
                                                   ----------------
respect to such Persons who have received and accepted Qualifying Offers, whose
terms and conditions of employment with Buyer or any of its Affiliates are
changed during the 12-month period immediately following the Closing Date, such
that such terms and conditions fail to satisfy all of the requirements set forth
in Section 9.1(d) above.

         SECTION 9.5       COBRA. Buyer shall provide notice of and the
                           -----
opportunity to purchase continuation coverage as required by COBRA to any
dependent or former dependent of a Transferred Union Employee or Transferred
Non-Union Employee who incurs a "qualifying event" (as such term is defined in
COBRA) on or after the Closing Date, or who incurs a "qualifying event" prior to
the Closing Date (other than a termination of employment or death of the
employee) as to which notice is not provided to Seller or Buyer until the
Closing Date or thereafter.

         SECTION 9.6       WARN Act. Buyer shall be responsible, with respect to
                           --------
the Auctioned Assets, for performing and disclosing all requirements under the
WARN Act and applicable state and local laws and regulations for the
notification of its employees of any "employment loss" within the meaning of the
WARN Act which occurs following the Closing Date.

                                       45
<PAGE>

                                    ARTICLE X
                                    ---------

                     Indemnification and Dispute Resolution
                     --------------------------------------

         SECTION 10.1      Indemnification.
                           ---------------

         (a) Seller will indemnify and hold harmless Buyer and its Affiliates
and their respective directors, officers, employees and agents (collectively
with Buyer and its Affiliates, the "Buyer Indemnities") from and against any and
                                    -----------------
all claims, demands or suits by any person, and all losses, liabilities,
damages, obligations, payments, costs and expenses (including reasonable legal
fees and expenses and including costs and expenses incurred in connection with
investigations and settlement proceedings) (each, an "Indemnifiable Loss"), as
                                                      ------------------
incurred, asserted against or suffered by any Buyer Indemnitee relating to,
resulting from or arising out of:

             (i)          any breach by Seller of any covenant or agreement of
                          Seller contained in this Agreement or, prior to their
                          expiration in accordance with Section 12.3, the
                          representations and warranties contained in Sections
                          5.1, 5.2, 5.3 and 5.15 hereof;

             (ii)         any breach by Seller of its obligations under Section
                          7.12(1) hereof;

             (iii)        the Retained Liabilities;

             (iv)         the Panda Litigation; or

             (v)          any breach by Seller of any Ancillary Agreement.

         (b) Buyer will indemnify and hold harmless Seller and its Affiliates
and their respective directors, officers, trustees, employees and agents
(collectively with Seller and its Affiliates, the "Seller Indemnitees") from and
                                                   ------------------
against any and all Indemnifiable Losses, as incurred, asserted against or
suffered by any Seller Indemnitee relating to, resulting from or arising out of:

             (i)          any breach by Buyer of any covenant or agreement of
                          Buyer contained in this Agreement or, prior to their
                          expiration in accordance with Section 12.3, the
                          representations and warranties contained in Sections
                          6.1,6.2,6.3 and 6.5 hereof;

                                       46
<PAGE>

             (ii)         the Assumed Obligations (other than any Indemnifiable
                          Losses resulting from any breach by Seller of its
                          obligations under Section 7.12(i) hereof);

             (iii)        any obligation resulting from any action or inaction
                          of Buyer (A) under any Contract or warranty pursuant
                          to Section 2.4(b) or Schedule 2.4 attached hereto
                                               ------------
                          (whether acting as principal or representative and
                          agent for Seller or otherwise) or (B) pursuant to any
                          Transferable Permit in respect of which Seller remains
                          the holder of record after the Closing Date pursuant
                          to Section 7.3(c);

             (iv)         any transfer, sales or excise tax obligations imposed
                          on the Seller arising from the sale or transfer of the
                          Auctioned Assets; or

             (v)          any breach by Buyer of any Ancillary Agreement.

         (c) The amount of any Indemnifiable Loss shall be reduced to the extent
that the relevant Buyer Indemnitee or Seller Indemnitee (each, an "Indemnitee")
                                                                   ----------
receives any insurance proceeds with respect to an Indemnifiable Loss and shall
be (i) increased to take account of any Tax Cost incurred by the Indemnitee
arising from the receipt of indemnity payments hereunder and (ii) reduced to
take account of any Tax Benefit realized by the Indemnitee arising from the
incurrence or payment of any such Indemnifiable Loss. If the amount of any
Indemnifiable Loss, at any time subsequent to the making of an indemnity payment
in respect thereof, is reduced by recovery, settlement or otherwise under or
pursuant to any insurance coverage, or pursuant to any claim, recovery,
settlement or payment by or against any other person, the amount of such
reduction, less any costs, expenses or premiums incurred in connection
therewith, will promptly be repaid by the Indemnitee to the Party required to
provide indemnification hereunder (the "Indemnifying Party") with respect to
                                        ------------------
such Indemnifiable Loss.

         (d) To the fullest extent permitted by law, neither Party nor any Buyer
Indemnitee or any Seller Indemnitee shall be liable to the other Party or any
other Buyer Indemnitee or Seller Indemnitee for any claims, demands or suits for
consequential, incidental, special, exemplary, punitive, indirect or multiple
damages connected with or resulting from any breach after the Closing Date of
this Agreement or the Ancillary Agreements (other than breach of this Article X
or as otherwise expressly set forth in any Ancillary Agreement), or any actions
undertaken in connection with or related hereto or thereto, including any such
damages which are based upon breach of contract, tort (including negligence and

                                       47
<PAGE>

misrepresentation), breach of warranty, strict liability, statute, operation of
law or any other theory of recovery.

         (e) The rights and remedies of Seller and Buyer under this Article X
are, solely as between Seller and Buyer, exclusive and in lieu of any and all
other rights and remedies which Seller and Buyer may have under this Agreement,
the Ancillary Agreements (except as otherwise expressly set forth in any
Ancillary Agreement) or otherwise for monetary relief with respect to (i) any
breach of, or failure to perform, any covenant or agreement set forth in this
Agreement or the Ancillary Agreements by Seller or Buyer, (ii) any breach of any
representation or warranty by Seller or Buyer, (iii) the Assumed Obligations or
the Retained Liabilities, and (iv) any obligation in respect of Section 2.4 or
Section 7.3. Each Party agrees that the previous sentence shall not limit or
otherwise affect any non-monetary right or remedy which Party may have under
this Agreement or the Ancillary Agreements or otherwise limit or affect either
Party's right to seek equitable relief, including the remedy of specific
performance.

         (f) Buyer and Seller agree that, notwithstanding Section 10.1(e), each
Party shall retain, subject to the other provisions of this Agreement, including
Sections 10.1(d) and 12.3, all remedies at law or in equity with respect to (i)
fraud or willful or intentional breaches of this Agreement or the Ancillary
Agreements and (ii) gross negligence or willful or wanton acts or omissions to
act of any Indemnitee (or any contractor or subcontractor thereof) on or after
the Closing Date.

         (g) Seller and Buyer agree that neither Party shall be responsible to
the other Party for any Indemnifiable Loss (relating to the breach of
representations and warranties made by such Party hereunder) pursuant to Section
10.1(a)(i) or Section 10.1(b)(i), as the case may be, unless and until the
aggregate amount of such Party's Indemnifiable Losses exceeds $5,000,000.
Notwithstanding the foregoing, the aggregate maximum liability of the Seller to
indemnify the Buyer for Indemnifiable Losses (relating to the breach of
representations and warranties made by the Seller hereunder) pursuant to Section
10(a)(i) shall not exceed an amount in excess of the Purchase Price paid by the
Buyer to the Seller.

         SECTION 10.2      Third Party Claims Procedures.
                           -----------------------------

         (a) If any Indemnitee receives notice of the assertion of any claim or
of the commencement of any claim, action, or proceeding made or brought by any
person who is not a Party or an Affiliate of a Party (a "Third Party Claim")
                                                         -----------------
with respect to which indemnification is to be sought from an Indemnifying
Party, the Indemnitee will give such Indemnifying Party reasonably prompt
written notice thereof, but in any event not later than 20 Business Days after
the Indemnitee's receipt of notice of such Third Party Claim; provided, however,
                                                              --------  -------
that a failure to give

                                       48
<PAGE>

timely notice will not affect the rights or obligations of any Indemnitee except
if, and only to the extent that, as a result of such failure, the Indemnifying
Party was actually prejudiced. Such notice shall describe the nature of the
Third Party Claim in reasonable detail and will indicate the estimated amount,
if practicable, of the Indemnifiable Loss that has been or may be sustained by
the Indemnitee.

         (b) If a Third Party Claim is made against an Indemnitee, the
Indemnifying Party will be entitled to participate in the defense thereof and,
if it so chooses, to assume the defense thereof with counsel selected by the
Indemnifying Parry; provided, however, that such counsel is not reasonably
                    --------  -------
objected to by the Indemnitee; and provided further that the Indemnifying Party
                                   ----------------
first admits in writing its liability to the Indemnitee with respect to all
material elements of such claim. Should the Indemnifying Party so elect to
assume the defense of a Third Party Claim, the Indemnifying Party will not be
liable to the Indemnitee for any legal expenses subsequently incurred by the
Indemnitee in connection with the defense thereof. If the Indemnifying Party
elects to assume the defense of a Third Party Claim, the Indemnitee will (i)
cooperate in all reasonable respects with the Indemnifying Party in connection
with such defense, (ii) not admit any liability with respect to, or settle,
compromise or discharge, any Third Party Claim without the Indemnifying Party's
prior written consent and (iii) agree to any settlement, compromise or discharge
of a Third Party Claim which the Indemnifying Party may recommend and which by
its terms obligates the Indemnifying Party to pay the full amount of the
liability in connection with such Third Party Claim and releases the Indemnitee
completely in connection with such Third Party Claim. In the event the
Indemnifying Party shall assume the defense of any Third Party Claim, the
Indemnitee shall be entitled to participate in (but not control) such defense
with its own counsel at its own expense. If the Indemnifying Party does not
assume the defense of any such Third Party Claim, the Indemnitee may defend the
same in such manner as it may deem appropriate, including settling such claim or
litigation after giving notice to the Indemnifying Party of the terms of the
proposed settlement and the Indemnifying Party will promptly reimburse the
Indemnitee upon written request. Anything contained in this Agreement to the
contrary notwithstanding, no Indemnifying Party shall be entitled to assume the
defense of any Third Party Claim if such Third Party Claim seeks an order,
injunction or other equitable relief or relief for other than monetary damages
against the Indemnitee which, if successful, would materially adversely affect
the business of the Indemnitee.

                                       49
<PAGE>

                                   ARTICLE XI
                                   ----------

                                   Termination
                                   -----------

         SECTION 11.1      Termination.
                           -----------

         (a) This Agreement may be terminated at any time prior to the Closing
by an instrument in writing signed on behalf of each of the Parties.

         (b) This Agreement may be terminated by Seller or Buyer if the Closing
shall not have occurred on or before the date that is 12 months from the date of
this Agreement (the "Termination Date"); provided, however, that the right to
                     ----------------    --------  -------
terminate this Agreement pursuant to this Section 11.1(b) shall not be available
(i) to any Party whose failure to fulfill any obligation under this Agreement
has been the cause of, or resulted in, the failure of the Closing to occur on or
before such date, or (2) to Buyer if the Seller has provided the Buyer with
written notice of its election to postpone the Closing for up to an eighteen
month period from the execution date of this Agreement in the event that all
conditions precedent to Closing set forth in Article VIII have been satisfied
except with respect to those conditions set forth in Section 8.1(a).

         (c) This Agreement may be terminated by either Seller or Buyer if any
Restraint having any of the effects set forth in Section 8.1(b) shall be in
effect and shall have become final and nonappealable; provided, however, that
                                                      --------  -------
the Party seeking to terminate this Agreement pursuant to this Section 11.1(c)
shall have used its reasonable best efforts to prevent the entry of and to
remove such Restraint.

         (d) This Agreement may be terminated by the Party entitled to do so
under the provisions of Section 7.11(b).

                                   ARTICLE XII
                                   -----------

                            Miscellaneous Provisions
                            ------------------------

         SECTION 12.1      Expenses. Except to the extent specifically provided
                           --------
herein, all costs and expenses incurred in connection with this Agreement and
the transactions contemplated hereby shall be borne by the Party incurring such
costs and expenses, whether or not the transactions contemplated hereby arc
consummated.

                                       50
<PAGE>

         SECTION 12.2      Amendment and Modification; Extension; Waiver. This
                           ---------------------------------------------
Agreement may be amended, modified or supplemented only by an instrument in
writing signed on behalf of each of the Parties. Either Party may (i) extend the
time for the performance of any of the obligations or other acts of the other
Party, (ii) waive any inaccuracies in the representations and warranties of the
other Party contained in this Agreement or (iii) waive compliance by the other
Party with any of the agreements or conditions contained in this Agreement. Any
agreement on the part of a Party to any such extension or waiver shall be valid
only if set forth in an instrument in writing signed on behalf of such Party.
The failure of a Party to this Agreement to assert any of its rights under this
Agreement or otherwise shall not constitute a waiver of such rights.

         SECTION 12.3      No Survival of Representations or Warranties. Each
                           --------------------------------------------
and every representation and warranty contained in this Agreement, other than
the representations and warranties contained in Sections 5.1, 5.2, 5.3 and 5.15
and 6.1, 6.2, 6.3 and 6.5 (which representations and warranties shall survive
for 12 months from the Closing Date), shall expire with, and be terminated and
extinguished by the Closing and no such representation or warranty shall survive
the Closing Date. From and after the Closing Date, none of Seller, Buyer or any
officer, director, trustee or Affiliate of any of them shall have any liability
whatsoever with respect to any such representation or warranty. The expiration
of the representations and warranties contained in Sections 5.1, 5.2, 5.3 and
5.15 and 6.1, 6.2,6.3 and 6.5 shall not affect the Parties' obligations under
Article X if the Indemnitee provided the Indemnifying Party with proper notice
of the claim or event for which indemnification is sought prior to such
expiration.

         SECTION 12.4      Notices. All notices and other communications
                           -------
hereunder shall be in writing and shall be deemed given (as of the time of
delivery or, in the case of a telecopied communication, of confirmation) if
delivered personally, telecopied (which is confirmed) or sent by overnight
courier (providing proof of delivery) to the Parties at the following addresses
(or at such other address for a Party as shall be specified by like notice):

                     if to Seller, to:

                           Potomac Electric Power Company
                           1900 Pennsylvania Avenue, N.W.
                           Washington, D.C. 20068
                           Telecopier (202) 261-7889
                           Attention: William T. Torgerson, General Counsel

                                       51
<PAGE>

                     with a copy on or prior to the Closing Date to:

                           Dickstein Shapiro Morin & Oshinsky LLP
                           2101 L Street, N.W.
                           Washington, D.C. 20037
                           Telecopier (202) 887-0689
                           Attention:  Kenneth M. Simon, Esq.

                     if to Buyer, to:

                           Southern Energy, Inc.
                           900 Ashwood Parkway
                           Suite 500
                           Atlanta, Georgia 30338-4780
                           Telecopier: (770) 821-6575
                           Attention:  Anne Cleary

                     with a copy on or prior to the Closing Date to:

                           Troutman Sanders LLP
                           1300 1 Street, NW
                           Suite 500 East
                           Washington, DC 20005
                           Telecopier (202) 274-2994
                           Attention:  Benjamin L. Israel, Esq.

         SECTION 12.5      Assignment; No Third Party Beneficiaries.
                           ----------------------------------------

         (a) This Agreement and all of the provisions hereof shall be binding
upon and inure to the benefit of the Parties and their respective successors and
permitted assigns, but neither this Agreement nor any of the rights, interests
or obligations hereunder shall be assigned by any Party, including by operation
of law, without the prior written consent of the other Party, except (i) in the
case of Seller (A) to an Affiliate of Seller or a third party in connection with
the transfer of the Transmission System to such Affiliate or third party or (B)
to a lending institution or trustee in connection with a pledge or granting of a
security interest in all or any part of the Transmission System and this
Agreement and (ii) in the case of Buyer (A) prior to the Closing, to one or more
wholly-owned subsidiaries of Buyer or lending institutions or other
institutional investors acting as lessor to Buyer or one or more wholly-owned
subsidiaries of Buyer, so long as Buyer shall have duly executed and delivered
the Guarantee Agreement and such assignment is for all of Buyer's rights,
interests and obligations hereunder associated with the asset(s) subject to any
such assignment, (B) to an Affiliate of Buyer in connection with the

                                       52
<PAGE>

transfer of all or part of the Auctioned Assets to such Affiliate and (C) to a
lending institution or trustee in connection with a pledge or granting of a
security interest in the Auctioned Assets and this Agreement; provided, however,
                                                              --------  -------
that no assignment or transfer of rights or obligations by either Party shall
relieve it from the full liabilities and the full financial responsibility, as
provided for under this Agreement, unless and until the transferee or assignee
shall agree in writing to assume such obligations and duties and the other Party
has consented in writing to such assumption.

         (b) Nothing in this Agreement is intended to confer upon any other
person except the Parties any rights or remedies hereunder or shall create any
third parry beneficiary rights in any person, including, with respect to
continued or resumed employment, any employee or former employee of Seller
(including any beneficiary or dependent thereof). No provision of this Agreement
shall create any rights in any such persons in respect of any benefits that may
be provided, directly or indirectly, under any employee benefit plan or
arrangement except as expressly provided for thereunder.

         SECTION 12.6      Governing Law. This Agreement shall be governed by
                           -------------
and construed in accordance with the laws of the District of Columbia
(regardless of the laws that might otherwise govern under applicable principles
of conflicts of law).

         SECTION 12.7      Counterparts. This Agreement may be executed in two
                           ------------
or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

         SECTION 12.8      Interpretation. When a reference is made in this
                           --------------
Agreement to an Article, Section, Schedule or Exhibit, such reference shall be
to an Article or Section of, or Schedule or Exhibit to, this Agreement unless
otherwise indicated. The table of contents and headings contained in this
Agreement are for reference purposes only and shall not affect in any way the
meaning or interpretation of this Agreement. Whenever the words "include",
"includes"' or "including" are used in this Agreement, they shall be deemed to
be followed by the words "without limitation" or equivalent words. The words
"hereof", "herein" and "hereunder" and words of similar import when used in this
Agreement shall refer to this Agreement as a whole and not to any particular
provision of this Agreement. All terms defined in this Agreement shall have the
defined meanings when used in the Ancillary Agreements and any certificate or
other document made or delivered pursuant hereto or thereto unless otherwise
defined therein. The definitions contained in this Agreement are applicable to
the singular as well as the plural forms of such terms and to the masculine as
well as to the feminine and neuter genders of such term. Any agreement,
instrument, statute, regulation, rule or order defined or referred to herein or
in any agreement or instrument that is referred to herein means such agreement,
instrument, statute, regulation, rule or order as from time to time

                                       53
<PAGE>

amended, modified or supplemented, including (in the case of agreements or
instruments) by waiver or consent and (in the case of statutes, regulations,
rules or orders) by succession of comparable successor statutes, regulations,
rules or orders and references to all attachments thereto and instruments
incorporated therein. References to a person are also to its permitted
successors and assigns. Each Party acknowledges that it has been represented by
counsel in connection with the review and execution of this Agreement and,
accordingly, there shall be no presumption that this Agreement or any provision
hereof be construed against the Party that drafted this Agreement.

         SECTION 12.9      Jurisdiction and Enforcement.
                           ----------------------------

         (a) Each of the Parties irrevocably submits to the exclusive
jurisdiction of (i) the Superior Court of the District of Columbia and (ii) the
United States District Court for the District of Columbia, for the purposes of
any suit, action or other proceeding arising out of this Agreement or any
transaction contemplated hereby. Each of the Parties agrees to commence any
action, suit or proceeding relating hereto either in the United States District
Court for the District of Columbia or, if such suit, action or proceeding may
not be brought in such court for jurisdictional reasons, in the Superior Court
of the District of Columbia. Each of the Parties further agrees that service of
process, summons, notice or document by hand delivery or U.S. registered mail at
the address specified for such Party in Section 12.4 (or such other address
specified by such Party from rime to time pursuant to Section 12.4) shall be
effective service of process for any action, suit or proceeding brought against
such Party in any such court. Each of the Parties irrevocably and
unconditionally waives any objection to the laying of venue of any action, suit
or proceeding arising out of this Agreement or the transactions contemplated
hereby in (i) the Superior Court of the District of Columbia and (ii) the United
States District Court for the District of Columbia, and hereby further
irrevocably and unconditionally waives and agrees not to plead or claim in any
such court that any such action, suit or proceeding brought in any such court
has been brought in an inconvenient forum.

         (b) The Parties agree that irreparable damage would occur in the event
that any of the provisions of this Agreement or any Ancillary Agreement were not
performed in accordance with their specific terms or were otherwise breached. It
is accordingly agreed that the Parties shall be entitled to an injunction or
injunctions to prevent breaches of this Agreement or any Ancillary Agreement and
to enforce specifically the terms and provision of this Agreement or any
Ancillary Agreement, this being in addition to any other remedy to which they
are entitled at law or in equity.

                                       54
<PAGE>

         SECTION 12.10     Entire Agreement. This Agreement, the Confidentiality
                           ----------------
Agreement and the Ancillary Agreements including the Exhibits, Schedules,
documents, certificates and instruments referred to herein or therein and other
contracts, agreements and instruments contemplated hereby or thereby, embody the
entire agreement and understanding of the Parties in respect of the transactions
contemplated by this Agreement. There are no restrictions, promises,
representations, warranties, covenants or undertakings other than those
expressly set forth or referred to herein or therein. This Agreement and the
Ancillary Agreements supersede all prior agreements and understandings between
the Parties with respect to the transactions contemplated by this Agreement
other than the Confidentiality Agreement.

         SECTION 12.11     Severability. If any term or other provision of this
                           ------------
Agreement is invalid, illegal or incapable of being enforced by any rule of law
or public policy, all other conditions and provisions of this Agreement shall
nevertheless remain in full force and effect. Upon such determination that any
term or other provision is invalid, illegal or incapable of being enforced, the
Parties shall negotiate in good faith to modify this Agreement so as to effect
the original intent of the Parties as closely as possible to the fullest extent
permitted by applicable law in an acceptable manner to the end that the
transactions contemplated hereby are fulfilled to the extent possible.

         SECTION 12.12     Conflicts. Except as expressly otherwise provided
                           ---------
herein or therein, in the event of any conflict or inconsistency between the
terms of this Agreement and the terms of any Ancillary Agreement, the terms of
this Agreement shall prevail.

                                       55
<PAGE>

         IN WITNESS WHEREOF, Seller and Buyer have caused this Agreement to be
signed by their respective duly authorized officers as of the date first above
written.

                                     POTOMAC ELECTRIC POWER COMPANY

                                     By: /s/ Mary Sharpe-Hayes
                                         ----------------------------------
                                         Name: Mary Sharpe-Hayes
                                         Title: Vice President

                                     SOUTHERN ENERGY, INC.

                                     By: /s/ Anne M. Cleary
                                         ----------------------------------
                                         Name: Anne M. Cleary
                                         Title: Vice President, Southern
                                                Energy North America,
                                                Inc., as authorized agent

<PAGE>

                                   Schedule 1.1

                                   Definitions

         "Accountants" shall have the meaning set forth in Section 3.2(b).
          -----------

         "Adjustment Amount" shall have the meaning set forth in Section 3.4.
          -----------------

         "Adjustment Date" shall have the meaning set forth in Section 3.2(c).
          ---------------

         "Adjustment Statement" shall have the meaning set forth in Section
          --------------------
3.2(a).

         "Affiliate" shall have the meaning set forth in Rule 12b-2 of the
          ---------
General Rules and Regulations under the Securities Exchange Act of 1934, as
amended.

         "Agreement" shall have the meaning set forth in the Preamble.
          ---------

         "Allocation" shall have the meaning set forth in Section 3.3.
          ----------

         "Ancillary Agreements" means the Potomac River Lease, the Local Area
          --------------------
Support Agreement, the Transition Power Agreements, the Interconnection
Agreements, the Assignment and Assumption Agreement, Bill of Sale, Guarantee
Agreement, Operating Agreement, the deeds contemplated by Section 8.2(e)(i) and
any other agreement to which Buyer and Seller are party and which is expressly
identified by its terms as an Ancillary Agreement hereunder.

         "Applicable Law" shall have the meaning set forth in Section 3.3.
          --------------

         "Ash Storage Sites" mean those certain ash storage sites of the Seller
          -----------------
located in Charles County, Maryland, Prince George's County, Maryland, and
Montgomery County, Maryland, as more fully described on Schedule 2.2(a)(iii) and
                                                        --------------------
Schedule 5.5(a) attached to the Agreement.
---------------

         "Assignment and Assumption Agreement" means that Assignment and
          -----------------------------------
Assumption Agreement, to be entered into at the Closing by Buyer and Seller, in
substantially the form as Exhibit A attached to the Agreement.

         "Assumed Consent Order Obligations" shall have the meaning set forth in
          ---------------------------------
Section 2.3(a)(iv).
<PAGE>

         "Assumed Obligations" shall have the meaning set forth in Section
          -------------------
2.3(a).

         "Auctioned Assets" shall have the meaning set forth in Section 2.2(a).
          ----------------

         "Benefit Plans" shall have the meaning set forth in Section 5.12.
          -------------

         "Bill of Sale" means that certain Bill of Sale, to be entered into at
          ------------
the Closing by Buyer (or Buyer's permitted assignees pursuant to Section
12.5(a)) and Seller, in substantially the form as Exhibit B attached to the
Agreement.

         "Business Day" means any day other than Saturday, Sunday and any day
          ------------
which is a legal holiday or a day on which banking institutions in Washington,
DC are authorized or required by law or other action of a Governmental Authority
to close.

         "Buyer" shall have the meaning set forth in the Preamble to the
          -----
Agreement.

         "Buyer Facilities" shall have the meaning given to such term in the
          ----------------
Easements Agreement.

         "Buyer Indemnitees" shall have the meaning set forth in Section
          -----------------
10.1(a).

         "Buyer Material Adverse Effect" means any change or event which would
          -----------------------------
have a material adverse effect on the ability of the Buyer to consummate the
transactions contemplated by, and discharge its obligations under, the Agreement
and the Ancillary Agreements.

         "Buyer Real Estate" shall have the meaning set forth in Section
          -----------------
2.2(a)(i).

         "Buyer Required Regulatory Approvals" shall have the meaning set forth
          -----------------------------------
in Section 6.3(b).

         "Buyer's Pension Plans" shall have the meaning set forth in Section
          ---------------------
9.2.

         "Buyer's Savings Plan" shall have the meaning set forth in Section 9.3.
          --------------------

         "Chalk Point/Morgantown Fuel Pipeline" means the (i) 16" pipeline,
          ------------------------------------
including all components, between the Piney Point petroleum terminal and the
Ryceville Pumping Station and (ii) the 12" pipelines, including all components,
between the Ryceville Pumping Station and the Chalk Point Station and

                                       ii
<PAGE>

Morgantown Station, as more fully described on Schedule 5.5(a) attached to the
                                               ---------------
Agreement.

         "Chalk Point Station" means that certain coal, oil and gas fueled
          -------------------
generating facility of the Seller located on the Patuxent River in Aquasco,
Maryland (excluding that certain combustion turbine and related assets owned by
Southern Maryland Electric Cooperative, Inc.), as more fully described on
Schedule 2.2(a)(iii) and Schedule 5.5(a) attached to the Agreement.
--------------------     ---------------

         "Closing" shall have the meaning set forth in Section 4.1.
          -------

         "Closing Adjustment Amount" shall have the meaning set forth in Section
          -------------------------
3.2(c).

         "Closing Date" shall have the meaning set forth in Section 4.1.
          ------------

         "Closing Date Benefits" shall have the meaning set forth in Section
          ---------------------
9.2.

         "Closing Severance Expenses" shall have the meaning set forth in
          --------------------------
Section 2.3(a)(x).

         "Code" means the Internal Revenue Code of 1986, as amended.
          ----

         "Communications Equipment" means the equipment, systems, switches and
          ------------------------
lines used in connection with voice, data and other communications activities.

         "Conemaugh Interest" means the 9.72% undivided ownership interest held
          ------------------
by Seller, as a tenant-in-common, in the Conemaugh Station, together with the
Seller's undivided ownership interest in any related assets held in undivided
ownership with the other Persons having an undivided ownership interest in the
Conemaugh Station (except in the case of Seller's undivided ownership interest
in the Conemaugh Switchyard and the Conemaugh Transmission Line).

         "Conemaugh Station" means that contain coal-fired generating facility
          -----------------
located on the Conemaugh River in Indiana County, Pennsylvania.

         "Conemaugh Switchyard" means that certain 500kV switchyard, as
          --------------------
described on Schedule 2.2(b)(i) attached to the Agreement.
             ------------------

         "Conemaugh Transmission Line" means that certain 500kV transmission
          ---------------------------
line, as described on Schedule 2.2(b)(i) attached to the Agreement.
                      ------------------

                                      iii
<PAGE>

         "Confidentiality Agreement" means the Confidentiality Agreement dated
          -------------------------
February 10, 2000 between Seller and Buyer.

         "Contracts" shall have the meaning set forth in Section 2.2(a)(iv).
          ---------

         "DCPSC" means the Public Service Commission of the District of
          -----
Columbia.

         "Dickerson Station" means that certain coal, oil and gas-fuel fired
          -----------------
generating facility of the Seller located on the Potomac River near Dickerson,
Maryland, as more filly described on Schedule 2.2(A)(iii) and Schedule 5.5(a)
                                     --------------------     ---------------
attached to the Agreement.

         "Disposed Items" shall have the meaning set forth in Section
          --------------
2.3(a)(iii).

         "Easements Agreements" mean those certain Easements Agreements, to be
          --------------------
entered into at the Closing by Buyer and Seller, in substantially the form as
Exhibits C-1, C-2, C-3 and C-4 attached to the Agreement.

         "Emission Reduction Credits" means credits, in units that are
          --------------------------
established by the environmental regulatory agency with jurisdiction over the
source or facility that has obtained the credits, resulting from a reduction in
the emissions of air pollutants from an emitting source or facility (including,
and to the extent allowable under applicable law, reductions from retirements,
control of emissions beyond that required by applicable law and fuel switching),
that: (i) have been certified by the Maryland Department of the Environment or
the Virginia Department of Environmental Quality, as the case may be, as
complying with the law and regulations of the State of Maryland or the
Commonwealth of Virginia, as the case may be, governing the establishment of
such credits; or (u) have been certified by any other applicable regulatory
authority as complying with the law and regulations governing the establishment
of such credits. Emission Reduction Credits include certified air emissions
reductions, as described above, regardless of whether the regulatory agency
certifying such reductions designates such certified air emissions reductions by
a name other than "emissions reduction credits", but do not include SO\\2\\
Allowances or NO\\2\\ Allowances.

         "Employees" shall have the meaning set forth in Section 9.1(d).
          ---------

         "Encumbrances" means any mortgages, pledges, liens, security interests,
          ------------
conditional and installment sale agreements, activity and use limitations,
exceptions, conservation easements, rights-of-way, deed restrictions,
encumbrances and charges of any kind.

         "Entitlements" means all rights of Seller to receive any capacity,
          ------------
energy, ancillary services and other benefits under any PPA.

                                       iv
<PAGE>

         "Environmental Laws" means all former, current and future Federal,
          ------------------
state, local and foreign laws (including common law), treaties, regulations,
rules, ordinances, codes, decrees, judgments, directives or orders (including
consent orders) and Environmental Permits, in each case, relating to pollution
or protection of the environment or natural resources, including laws relating
to Releases or threatened Releases, or otherwise relating to the generation,
manufacture, processing, distribution, use, treatment, storage, arrangement for
disposal, transport, recycling or handling, of Hazardous Substances.

         "Environmental Liability" means all liabilities, obligations, damages,
          -----------------------
losses, claims, actions, suits, judgments, orders, fines, penalties, fees,
expenses and costs, including: (i) remediation costs, engineering costs,
environmental consultant fees, laboratory fees, permitting fees, investigation
costs and defense costs and attorneys' fees and expenses; (ii) any claims,
demands and causes of action relating to or resulting from any personal injury
(including wrongful death, pain, suffering and loss of consortium), property
damage (real or personal) (including nuisance, trespass and diminution of value)
or natural resource damage; and (iii) any penalties, fines or costs associated
with the failure to comply with any Environmental Law.

         "Environmental Permits" means the permits, licenses, consents,
          ---------------------
approvals and other governmental authorizations with respect to Environmental
Laws relating primarily to the power generation operations of the Generating
Facilities.

         "ERISA" means the Employee Retirement Income Security Act of 1974, as
          -----
amended.

         "ERISA Affiliate" shall have the meaning set forth in Section 5.12.
          ---------------

         "Estimated Non-Fuel Related Adjustment Amount" shall have the meaning
          --------------------------------------------
set forth in Section 4.2(b).

         "Estimated Purchase Price" shall have the meaning set forth in Section
          ------------------------
4.2.

         "Exempt Facilities" means those certain facilities included in the
          -----------------
Auctioned Assets which are listed on Schedule 7.12 attached to the Agreement.
                                     -------------
         "FERC" means the Federal Energy Regulatory Commission.
          ----

         "Filed Seller SEC Documents" means the reports, schedules, forms,
          --------------------------
statements and other documents filed by Seller with the Securities and Exchange
Commission, and publicly available prior to the date of the Agreement.

         "Final Allocation" shall have the meaning set forth in Section 3.3.
          ----------------

                                       v
<PAGE>

         "Final Fuel Related Adjustment Amount" shall have the meaning set forth
          ------------------------------------
in Section 3.1(a).

         "Final Non-Fuel Related Adjustment Amount" shall have the meaning set
          ----------------------------------------
forth in Section 3.2(a).

         "GAAP" shall have the meaning set forth in Section 1.2.
          ----

         "Generating Facilities" means the Generating Plants and related
          ---------------------
facilities (including the Chalk Point/Morgantown Fuel, Pipeline, the Ryceville
Pumping Station, the Production Service Center, and the Ash Storage Sites), as
more fully described on Schedule 2.2(a)(iii) and Schedule S.5(a) attached to the
                        --------------------     ---------------
Agreement.

         "Generating Plants" means the following power generating plants of the
          -----------------
Seller: the Potomac River Station; the Dickerson Station; the Chalk Point
Station; and the Morgantown Station.

         "Good Utility Practice" means any of the applicable practices, methods
          ---------------------
and acts:

         (i)      required by FERC, NERC, MAAC, PJM Interconnection LLC, the PJM
                  System Operator, or the successor of any of them, whether or
                  not the Party whose conduct is at issue is a member thereof;

         (ii)     required by applicable law or regulations;

         (iii)    required by the Pepco Interconnection Standards or the
                  policies and standards of the Seller relating to emergency
                  operations;

         (iv)     otherwise engaged in or approved by a significant portion of
                  the electric utility industry during the relevant time period;

which, in the exercise of reasonable judgment in light of the facts known at the
time the decision was made, could have been expected to accomplish the desired
result at a reasonable cost consistent with law, regulation, good business
practices, reliability, safety, and expedition. Good Utility Practice is not
intended to be limited to the optimum practice, method, or act to the exclusion
of all others, but rather to be acceptable practices, methods, or acts generally
accepted in the region.

                                       vi
<PAGE>

         "Governmental Authority" means any court, administrative or regulatory
          ----------------------
agency or commission or other governmental entity or instrumentality, domestic,
foreign or supranational or any department thereof.

         "Greenhouse Gas Emission Reduction Credits" mean with respect to a
          -----------------------------------------
Federal or state law or regulation that imposes, or may at any time after the
Closing Date impose, a quantitative limitation on greenhouse gas emissions, or
taxes such emissions, an authorization to emit a unit of greenhouse gases or a
credit against such quantitative limit or taxes with respect to recognized
reductions in greenhouse gases, where greenhouse gases include carbon dioxide,
methane, nitrous oxide, hydrofluorcarbons, perfluorocarbons, and/or sulfur
hexafluoride.

         "Guarantee Agreement" means the Guarantee Agreement to be entered into
          -------------------
at Closing by Guarantor and Seller, substantially in the form of Exhibit D
attached to the Agreement.

         "Guarantor" means any credit-worthy entity, acceptable to Seller, which
          ---------
agrees to provide an unconditional guarantee to Seller of the full and punctual
payment of Buyer's obligations hereunder and under the Ancillary Agreements.

         "Hazardous Substances" means (i) any petrochemical or petroleum
          --------------------
products, crude oil or any fraction thereof, ash, radioactive materials, radon
gas, asbestos in any form, urea formaldehyde foam insulation or polychlorinated
biphenyls, (ii) any chemicals, materials, substances or wastes defined as,
included in, or that are alleged or determined by any Person or Governmental
Authority to be included in the definition of "hazardous substances," "hazardous
wastes," "hazardous materials," "restricted hazardous materials," "extremely
hazardous substances," "toxic substances," "PCBs," "contaminants," "asbestos" or
"pollutants" or similar term in any Environmental Law, (iii) any other chemical,
material, substance or waste which is prohibited, limited or regulated by any
Environmental Law, or (iv) any noise, electromagnetic radiation, and any other
substance or energy which causes or is alleged to cause personal injury
(including wrongful death, pain, suffering and loss of consortium) or property
damage (including nuisance, trespass and diminution of value).

         "HSR Act" means the Hart-Scott-Rodino Antitrust Improvements Act of
          -------
1976, as amended.

         "IBEW" means Local Union #1900 of the International Brotherhood of
          ----
Electrical Workers.

         "IBEW Collective Bargaining Agreement" means that certain Collective
          ------------------------------------
Bargaining Agreement, between the Seller and the IBEW, effective December 8,
1998, as amended from time to time.

                                      vii
<PAGE>

         "Income Tax" means any Federal, state, local or foreign Tax or surtax
          ----------
(i) based upon, measured by or calculated with respect to income, profits or
receipts or (ii) based upon, measured by or calculated with respect to multiple
bases (including corporate franchise taxes) if one or more of the bases on which
such Tax may be based, measured by or calculated with respect to, is described
in clause (i), in each case, together with any interest, penalties, or additions
to such Tax.

         "Indemnifiable Loss" shall have the meaning set forth in Section
          ------------------
10.1(a).

         "Indemnifying Party" shall have the meaning set forth in Section
          ------------------
10.1(c).

         "Indemnitee" shall have the meaning set forth in Section 10.01(c).
          ----------

         "Information Memorandum" means the Information Memoranda, prepared on
          ----------------------
behalf of the Seller, describing the Generating Facilities and the PPAs, and the
materials delivered with such Information Memoranda, as such Information
Memoranda and such materials may have been amended or supplemented.

         "Interconnection Agreements" means those certain Interconnection
          --------------------------
Agreements, to be entered into at the Closing by Seller and Buyer, substantially
in the form of Exhibits E-1, E-2, E-3 and E-4 attached to the Agreement.
               ------------------------------

         "Interconnection Facilities" shall have the meaning given to such term
          --------------------------
in the Interconnection Agreements.

         "Interconnection Services" shall have the meaning set forth in the
          ------------------------
Interconnection Agreements.

         "Inventory Survey" shall have the meaning set forth in Section 3.2(a).
          ----------------

         "Knowledge" means the actual knowledge of the directors and executive
          ---------
officers of the specified Person, which directors and executive officers are
charged with the responsibility for the particular function as of the date of
the Agreement, or with respect to any certificate delivered pursuant to the
Agreement, the date of delivery of such certificate.

         "Loan Agreements" shall have the meaning set forth in Section
          ---------------
2.3(a)(xii).

         "Local Area Support Agreement" means that Local Area Support Agreement,
          ----------------------------
to be entered into at Closing by Seller and Buyer, substantially in the form of
Exhibit F attached to the Agreement.
---------
                                      viii
<PAGE>

         "MAAC" means the Mid-Atlantic Area Council.
          ----

         "Material Adverse Effect" means any change, or effect on the Auctioned
          -----------------------
Assets, that, individually or in the aggregate, causes the value of the
Auctioned Assets to decrease by more than ten percent (10%) as compared to the
value of the Auctioned Assets immediately prior to the occurrence of such change
or effect, other than (i) any change or effect resulting from changes in the
international, national, regional or local wholesale or retail energy, capacity
or ancillary services electric power markets, (ii) any change or effect
resulting from changes in the international, national, regional or local markets
for fuel, (iii) any change or effect resulting from changes in the national,
regional or local electric transmission systems, (iv) any change or effect
resulting from any bid cap, price limitation, market power mitigation measure,
or other regulatory or legislative measure in respect of transmission services
or the wholesale or retail energy, capacity or ancillary services markets
adopted or approved by FERC, any PSC or any other Governmental Authority or
proposed by any person, (v) any change or effect resulting from any regulation,
rule, procedure or order adopted or proposed by or with respect to, or related
to, the PJM, (vi) any change or effect resulting from any action or measure
taken or adopted, or proposed to be taken or adopted, by any local, state,
regional, national or international reliability organization, (vii) any change
resulting from the failure of any Employees not to be employed by the Buyer
following the Closing, (viii) any changes in law, or any judgments, orders or
decrees that apply generally to similarly situated Persons, and (ix) any
materially adverse change in or effect on the Auctioned Assets which is cured by
Seller before the Closing Date. For purposes of determining the occurrence of a
Material Adverse Effect, the initial value of the Auctioned Assets shall be the
amount set forth in clause (a) of Section 3.1.

         "Material Contracts" shall have the meaning set forth in Section
          ------------------
5.7(a).

         "MDPSC" means the Public Service Commission of the State of Maryland.
          -----

         "Morgantown Station" means that certain coal/oil-fueled generating
          ------------------
facility of the Seller located on the Potomac River near Newburg, Maryland, as
more fully described on Schedule 2.2(a)(iii) and Schedule 5.5(a) attached to the
                        --------------------     ---------------
Agreement.

         "NERC" means North American Electric Reliability Council or any
          ----
successor thereto.

         "Non-Union Employees" shall have the meaning set forth in Section
          -------------------
9.1(d).

         "Novation" shall have the meaning set forth in Schedule 2.4 attached
          --------                                      ------------
hereto.

                                       ix
<PAGE>

         "NO\\1\\ Allowances" means nitrogen oxide allowances that have been
          ------------------
allocated to the Seller for the Generating Plants by (i) the Maryland Department
of the Environment under the State of Maryland's NO\\1\\, Budget Program
authorizing the emission of one ton of nitrogen oxide during the specified
control period, or (ii) the Virginia Department of Environmental Quality under
any budget program which may be established for the Commonwealth of Virginia.

         "OE PPA" collectively means those agreements identified in Item 4 of
          ------
Section I of Schedule 2.2(a)(iv) attached hereto.
             -------------------

         "Off-Site" means any location except (i) the Auctioned Assets, the
          --------
Potomac River Station Site, and (ii) any location to or under which Hazardous
Substances present or disposed on the Auctioned Assets or the Potomac River
Station Site have migrated or may migrate in the future.

         "Operating Agreement" means that certain Operating Agreement, to be
          -------------------
entered into at the Closing by Buyer and Seller, in substantially the form as
EXHIBIT G to the Agreement.

         "Operating Records" shall have the meaning set forth in Section
          -----------------
2.2(a)(viii).

         "Panda Litigation" means (i) the litigation captioned Potomac Electric
          ----------------
Power Company v. Panda-Brandywine, L.P., No. SOO-CV-1103, filed in the United
States District Court for the District of Maryland, and (ii) the legal
proceedings referenced in Schedule 5.8 hereto.
                          ------------

         "Panda PPA" means that certain PPA identified in Item S of Section I of
          ---------
Schedule 2.2(a)(vi) attached hereto.
-------------------

         "PANDA Release" shall have the meaning set forth in Section 3.4(a)(i).
          -------------

         "Party" shall have the meaning set forth in the Preamble.
          -----

         "Pepco Interconnection Standards" means Pepco's Interconnection and
          -------------------------------
Parallel Operating Guideline as amended from time to rime.

         "Permits" means the permits, licenses, consents, approvals and other
          -------
governmental authorizations (other than with respect to Environmental Laws)
relating primarily to the power generation operations of the Generating
Facilities.

         "Permitted Capital Expenditures" shall have the meaning set forth in
          ------------------------------
Section 7.1(b)(viii).

                                       x
<PAGE>

         "Permitted Exceptions" means (i) all exceptions, restrictions,
          --------------------
easements, charges, rights-of-way and monetary and nonmonetary encumbrances
which are set forth in any Permits or Environmental Permits, (ii) statutory
liens for current taxes or assessments not yet due or delinquent or the validity
of which is being contested in good faith by appropriate proceedings, (iii)
mechanics', carriers', workers', repairers' and other similar liens arising or
incurred in the ordinary course of business relating to obligations as to which
there is no default on the part of Seller or the validity of which are being
contested in good faith by appropriate proceedings, (iv) purchase money security
interests in respect of personal property arising or incurred in the ordinary
course of business, (v) zoning, entitlement, conservation restriction and other
land use and environmental regulations by Governmental Authorities, (v) all
matters disclosed on those surveys listed on Schedule 5.5(b) to the Agreement
                                             ---------------
and any other facts that would be disclosed by an accurate survey and physical
inspection of the Buyer Real Estate, (vi) Encumbrances, easements or other
restrictions created pursuant to or contemplated by any Ancillary Agreement,
(vii) Encumbrances of record or Encumbrances otherwise disclosed to Buyer in the
Agreement or the Ancillary Agreements with respect thereto, (viii) restrictions
and regulations imposed by the PJM, any Governmental Authority or any local,
state, regional, national or international reliability council and (ix) such
other Encumbrances or imperfections in or failure of title which would not,
individually or in the aggregate, create a Material Adverse Effect.

         "Person" means any individual, partnership, limited liability company,
          ------
joint venture, corporation, trust, unincorporated organization or Governmental
Authority.

         "PJM" means the Pennsylvania-New Jersey-Maryland interconnected power
          ---
pool operated under the PJM Agreement and any successor thereto including any
regional transmission operator, independent system operator, transco, or any
other independent system administrator that possesses operational or planning
control over the Transmission System.

         "PJM Agreement" means the Amended and Restated Operating Agreement of
          -------------
the PJM Interconnection LLC dated as of June 2, 1997.

         "PJM Control Area" shall mean the control area recognized by NERC as
          ----------------
the PJM Control Area.

         "PJM Interconnection LLC" means the independent system operator of the
          -----------------------
PJM Control Area pursuant to the PJM Agreement and the PJM Tariff

         "PJM System Operator" means the PJM energy control center staff
          -------------------
responsible for central dispatch as provided in the PJM Agreement.

                                       xi
<PAGE>

         "PJM Tariff" means the PJM Open Access Transmission Tariff providing
          ----------
transmission service within the PJM Control Area, including schedules,
appendices, or exhibits attached thereto, as in effect from time to time and as
amended or modified.

         "Potomac River Lease" means that Generating Station Lease Agreement, to
          -------------------
be entered into at the Closing by Seller and Buyer, substantially in the form of
Exhibit H attached to the Agreement.
---------

         "Potomac River Real Property" means that certain real property of the
          ---------------------------
Seller (which includes the Potomac River Station Site) described on Schedule
                                                                    --------
5.5(a) attached to the Agreement.
------

         "Potomac River Station" means that certain coal-fueled generating
          ---------------------
facility of the Seller located on the Potomac River in Alexandria, Virginia, as
more fully described on Schedule 2.2(a)(iii) and Schedule 5.5(a) attached to the
                        --------------------     ---------------
Agreement.

         "Potomac River Station Site" means that portion of the Potomac River
          --------------------------
Real Property to be leased by the Seller to the Buyer pursuant to the terms of
the Potomac River Lease.

         "PPAs" collectively means those power purchase agreements of the Seller
          ----
listed in Section I of Schedule 2.2(a)(iv) attached to the Agreement.
                       -------------------

         "Production Service Center" means that primary support facility of the
          -------------------------
Seller located near Washington, D.C., as more fully described on Schedule
                                                                 --------
2.2(a)(iii) and Schedule 5.5(a) attached to the Agreement.
-----------     ---------------

         "Prorated Items" shall have the meaning set forth in Section
          --------------
2.3(a)(viii).

         "Protective Relaying System" means the system relating to the
          --------------------------
Generating Facilities comprised of components collectively used to detect
defective power system elements or other conditions of an abnormal nature,
initiate appropriate control circuit action in response thereto and isolate the
appropriate system elements in order to minimize damage to equipment and
interruption to service.

         "PSC" means, either individually or collectively, the MDPSC, VCC, PUC
          ---
and DCPSC.

         "Purchase Price" shall have the meaning set forth in Section 3.1.
          --------------

         "PUC" means the Pennsylvania Utility Commission.

                                      xii
<PAGE>

         "Qualified Offer" shall have the meaning set forth in Section 9.1(d).
          ---------------

         "Regulatory Material Adverse Effect" shall occur where the Required
          ----------------------------------
Regulatory Approval contains terms and conditions that are materially adverse to
the Seller taken as a whole.

         "Release" means any release, spill, emission, leaking, dumping,
          -------
injection, pouring, deposit, disposal, discharge, dispersal, leaching or
migration into the environment (including ambient air, surface water,
groundwater, land surface or subsurface strata) or within any building,
structure, facility or fixture.

         "Required Regulatory Approvals" means with respect to a Party, any
          -----------------------------
consent or approval of, filing with, or notice to, any Governmental Authority
that is necessary for the execution and delivery of the Agreement and the
Ancillary Agreements by such Party or the consummation thereby of the
transactions contemplated hereby.

         "Restraints" shall have the meaning set forth in Section 8.1(b).
          ----------

         "Retained Assets" shall have the meaning set forth in Section 2.2(b).
          ---------------

         "Retained Liabilities" shall have the meaning set forth in Section
          --------------------
2.3(b).

         "Retained Rights" shall have the meaning given to such term in Schedule
          ---------------                                               --------

2.4 attached hereto.

         "Revenue Bonds" shall have the meaning set forth in Section 7.12(a)(i).
          -------------

         "Revenue Meters" means all meters measuring demand, energy and reactive
          --------------
components, and all pulse isolation relays, pulse conversion relays and
associated totalizing and remote access pulse recorder equipment, in each case,
required to measure the transfer of energy between the Parties.

         "Ryceville Pumping Station" means that certain pumping station and all
          -------------------------
components located in Ryceville, Maryland, as more fully described on Schedule
                                                                      --------
2.2(a)(iii) and Schedule 5.5(a) attached to the Agreement.
-----------     ---------------

         "Seller" shall have the meaning set forth in the Preamble to the
          ------
Agreement.

         "Seller Facilities" means those facilities of the Seller which are
          -----------------
described in the Easements Agreement.

                                      xiii
<PAGE>

         "Seller Indemnitees" shall have the meaning set forth in Section
          ------------------
10.1(b).

         "Seller Real Estate" means all real property and leaseholds or other
          ------------------
interests in real property of Seller (including the Potomac River Real
Property), and other than Buyer Real Estate.

         "Seller Required Regulatory Approvals" shall have the meaning set forth
          ------------------------------------
in Section 5.3(b).

         "Seller's Pension Plans" shall have the meaning set forth in Section
          ----------------------
9.2.

         "Seller's Savings Plan" shall have the meaning set forth in Section
          ---------------------
9.3.

         "Seller's Severance Plans" mean those certain plans or policies of the
          ------------------------
Seller, in effect on the date of Closing, which offer severance benefits to the
Non-Union Employees, as described on Schedule 1.1(c) attached to the Agreement.
                                     ---------------

         "SO\\2\\ Allowances" mean sulfur dioxide allowances that have been
          ------------------
allocated to Seller for the Generating Facilities by the Administrator of the
United States Environmental Protection Agency under Title IV of the Clean Air
Act authorizing the emission of one ton of sulfur dioxide per allowance during
or after a specified calendar year.

         "Support Operations" mean the business operations of the Seller which
          ------------------
are primarily engaged in the provision of support services to the ongoing
operation of the Generating Facilities (including business planning and strategy
services, fuel supply services, bulk power management services, generation
engineering and maintenance services, and environmental services).

         "Tax Benefit" means, with respect to any Indemnifiable Loss for any
          -----------
person, the positive excess, if any, of the Tax liability of such person without
regard to such Indemnifiable Loss over the Tax liability of such person taking
into account such Indemnifiable Loss, with all other circumstances remaining
unchanged.

         "Tax Cost" means, with respect to any indemnity payment for any person,
          --------
the positive excess, if any, of the Tax liability of such person taking such
indemnity payment into account over the Tax liability of such person without
regard to such payment, with all other circumstances remaining unchanged.

         "Tax Return" means any return, report, information return or other
          ----------
document (including any related or supporting information) required to be
supplied to any authority with respect to Taxes.

                                      xiv
<PAGE>

         "Taxes" means all taxes, surtaxes, charges, fees, levies, penalties or
          -----
other assessments imposed by any United States Federal, state or local or
foreign taxing authority, including Income Taxes, excise, property, sales,
transfer, franchise, special franchise, payroll, recording, withholding, social
security or other taxes, or any liability for taxes incurred by reason of
joining in the filing of any consolidated, combined or unitary Tax Returns, in
each case including any interest, penalties or additions attributable thereto;
provided, however, that "Taxes" shall not include sewer rents or charges for
water.

         "Termination Date" shall have the meaning set forth in Section 11.1(b).
          ----------------

         "Third Party Claim" shall have the meaning set forth in Section
          -----------------
10.2(a).

         "Total Cash Compensation" shall have the meaning set forth in Section
          -----------------------
9.1(d).

         "Transferable Permits" shall have the meaning set forth in Section
          --------------------
2.2(a)(v).

         "Transferred NO\\1\\ Allowances" shall have the meaning set forth in
          --------------------------
Section 2 .2(a)(vii).

         "Transferred S0\\2\\ Allowances" shall have the meaning set forth in
          --------------------------
Section 2.2(a)(vi).

         "Transferred Employee Records" shall have the meaning set forth in
          ----------------------------
Section 2.2(a)(viii).

         "Transferred Employees" shall have the meaning set forth in Section
          ---------------------
9.1(d).

         "Transferred Non-Union Employees" shall have the meaning set forth in
          -------------------------------
Section 9.1(d).

         "Transferred Savings Employees" shall have the meaning set forth in
          -----------------------------
Section 9.3.

         "Transferred Union Employees" shall have the meaning set forth in
          ---------------------------
Section 9.1(a).

         "Transition Power Agreements" means that Transition Power Agreement
          ---------------------------
(District of Columbia) and Transition Power Agreement (Maryland), to be entered

                                       xv
<PAGE>

into at Closing by Seller and Buyer, substantially in the form of Exhibits J.1
                                                                  ------------
and J.2, respectively, attached to the Agreement.

         "Transmission System" shall have the meaning set forth in Section
          -------------------
2.2(b)(i).

         "Unassigned PPA" shall have the meaning set forth in Schedule 2.4
          --------------                                      ------------
attached hereto.

         "Union Employees" shall have the meaning set forth in Section 9.1(a).
          ---------------

         "VCC" means the Virginia State Corporation Commission.
          ---

         "WARN Act" means the Federal Worker Adjustment Retraining and
          --------
Notification Act of 1988, as amended.

                                      xvi

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