Document:

<PAGE>   1
                                                                  Exhibit 10.72

                          ASSET DEMARCATION AGREEMENT

       This Asset Demarcation Agreement (the "Agreement") dated December 15,
1999, by and among The Connecticut Light and Power Company (Seller), a
Connecticut corporation and Connecticut Jet Power LLC, a Delaware limited
liability company ("Connecticut Jet Power"), Devon Power LLC, a Delaware
limited liability company ("Devon Power"), Middletown -Power LLC, a Delaware
limited liability company ("Middletown Power"), Montville Power LLC, a Delaware
limited liability company ("Montville Power"), Norwalk Power LLC, a Delaware
limited liability company ("Norwalk Power"), NRG Devon Operations, Inc., a
Delaware corporation ("Devon Operations"), NRG Middletown Operations, Inc., a
Delaware corporation ("Middletown Operations"), NRG Montville Operations, Inc.,
a Delaware corporation ("Montville Operations"), and NRG Norwalk Harbor
Operations, Inc., a Delaware corporation ("Norwalk Harbor Operations")
(individually the "Buyer" or collectively the "Buyers") and NRG Energy, Inc., a
Delaware Corporation ("NRG"). Capitalized terms used herein and not separately
defined herein shall have the meaning set forth in the Agreement (as defined
below).

                                  WITNESSETH:

       WHEREAS, Seller and NRG have entered into that certain Purchase and Sale
Agreement dated July 1, 1999 (the "Purchase and Sale Agreement"), pursuant to
which Seller has agreed to sell to NRG certain Acquired Assets (the term
"Acquired Assets" and all other capitalized terms not otherwise defined herein
having the respective meanings assigned to them in the Purchase and Sale
Agreement), which constitute all or a portion of Seller's non-nuclear
generation facilities; and

       WHEREAS, pursuant to that certain General Assignment and Assumption
Agreement, dated as of November 30, 1999 (the "Buyers' General Assignment"), a
copy of which is attached hereto as Exhibit 1, NIRG has assigned to the Buyers
and the Buyers have assumed, all of NRG's rights and obligations under the
Purchase and Sale Agreement; and

       WHEREAS, a significant portion of the Acquired Assets, as well as the
T&D Assets and other assets not included in the sale, comprises Improvements
located on real property to be either conveyed to Buyers as part of the sale or
retained by Seller, but the most appropriate point of demarcation between the
portion of the Improvements to be sold to Buyers and the portion to be retained
by Seller does not necessarily correspond to the lot line of the real estate
parcel conveyed or retained, as the case may be; and

       WHEREAS, accordingly, Seller, Buyers and NRG are entering into this
Agreement to evidence their agreement on the demarcation of ownership with
respect to those Improvements not situated wholly on property owned, or to be
owned, by either Seller or Buyers.

<PAGE>   2

       NOW, THEREFORE, in consideration of the foregoing, Seller, Buyers and
NRG hereby agree as follows:

       1.     Definitions. Whenever used in this Agreement with initial
capitalization, the following terms shall have the meanings specified or
referred to in this section.

       "Buyers Improvement" means that portion of any Improvement owned by the
Buyer, as is specified with respect to each of the Buyers in the Buyers'
General Assignment, after the Closing, specifically including that portion of
any such Improvement located on the property of the Seller, up to the Ownership
Demarcation Point.

       "Improvements" means all buildings, structures (including all fuel
handling and storage facilities), machinery and equipment, fixtures,
construction in progress, including all piping, cables and similar equipment
forming part of the mechanical, electrical, plumbing or HVAC infrastructure of
any building, structure or equipment, located on and affixed to the Sites.

       "Ownership Demarcation Point" means, with respect to any Improvement,
that point where the Seller Improvement ends and the Buyers Improvements
begins. The Ownership Demarcation Point for each Improvement is identified on
Exhibit A and the Schedules attached hereto and is shown on the Plan(s)
identified in such Schedules.

       "Plans" means (a) the surveys, easement or plot plans and sketches, (b)
engineering plans, including electrical, plumbing, heating, ventilating, water
or sewer or drainage system plans, diagrams, schematics, and other pictorial
representations of physical objects, regardless of medium.

       "Seller Improvement" means that portion of any Improvement owned by the
Seller after the Closing, specifically including that portion of any such
Improvement located on the property of the Buyers, up to the Ownership
Demarcation Point.

       2.     Agreement on Demarcation. Buyers, NRG and Seller hereby agree
that the respective Ownership Demarcation Points between the Seller
Improvements and Buyers Improvements shall be as delineated on Exhibit A and
the Schedules and Plans referenced therein. Except to the extent provided
otherwise under Section 3 hereof, Seller shall be responsible for Seller
Improvements up to the Ownership Demarcation Point, and Buyers and NRG shall be
responsible for Buyers Improvements up to the Ownership Demarcation Point.

       3.     Use, Maintenance and Operation of the Improvements. The use,
maintenance and operation of the Buyers Improvements and Seller Improvements,
respectively, to the extent located on the property of the other, shall be
governed by the provisions of the Interconnection Agreement by and between
Seller and Buyers, dated July 1, 1999, as amended, or by the provisions of any
separate Operating Agreement or Service Agreement entered into by the Parties
with respect to such Improvement.

                                       2

<PAGE>   3

       4.     Change or Modification of Demarcation. Either Party may at any
time propose to the other Party a change or other modification with respect to
any Ownership Demarcation Point. No such change or modification shall be valid
and binding unless both Parties execute a written amendment to this Agreement,
specifying in detail such change or modification, and attaching a Plan
depicting the new or modified Ownership Demarcation Point.

       5.     Additional Documentation of Transfer. In the event of a change in
the Ownership Demarcation Point, the Parties shall each execute and deliver to
the other such bills of sale or other instruments of transfer, and such other
documentation, as may be necessary under applicable law or regulation, or as
may be reasonably requested by the other Party to effectuate or confirm the
transfer of that portion of the Improvements affected by the modification in
the Ownership Demarcation Point.

       6.     Costs. Unless otherwise agreed by the Parties, all costs and
expenses reasonably attributable to a change or modification of an Ownership
Demarcation Point shall be borne by the Party proposing such change or
modification.

       7.     Regulation. Nothing in this Agreement shall require Buyers or NRG
to own any asset or equipment, operate or maintain any asset or equipment,
provide any service to Seller or to any other person, or take any other action
that could reasonably be expected to result in Buyers or NRG being regulated as
a public utility, electric utility, transmission company, distribution company,
or other entity subject to regulation under the Public Utility Holding Company
Act of 1935, the Federal Power Act (other than with respect to wholesale rates
under Section 205 thereof), or applicable public utility regulation in
Connecticut. The Parties agree to negotiate in good faith to modify this
Agreement to prevent such regulatory impacts from occurring and/or seek waivers
from such regulations, as necessary, and to make such modifications as may be
reasonably necessary to avoid Buyers or NRG becoming regulated as a public
utility solely as a result of this Agreement.

       8.     Representatives. Each Party shall designate an employee to act as
the representative of that Party with respect to issues arising with respect to
Ownership Demarcation Points identified in this Agreement. Any and all issues
with respect to the Ownership Demarcation Points shall in the first instance be
referred to the designated representatives of each Party for review and
decision.

       9.     Notices. All communications under this Agreement shall be in
writing and shall be delivered in person, against receipt, or sent by certified
mail, postage prepaid, return receipt requested, or by overnight delivery by a
courier service providing evidence of receipt, and properly addressed as
follows:

                                       3

<PAGE>   4

       If to Seller:

       By mail:      The Connecticut Light and Power Company
                     c/o Northeast Utilities Service Company
                     P.O. Box 270
                     Hartford, CT 06141-0270
                     Attention: John B. Keane
                                Vice President - Generation Divestiture

       By delivery:  The Connecticut Light and Power Company
                     c/o Northeast Utilities Service Company
                     107 Selden Street
                     Berlin, CT 06037
                     Attention: John B. Keane
                                Vice President - Generation Divestiture

       Copy to:      Cheryl Grise, Esquire
                     Vice President, Secretary and General Counsel
                     Northeast Utilities Service Company
                     P.O. Box 270
                     Hartford, CT 06141-0270

       If to Buyers:

                     NRG Energy, Inc.
                     1221 Nicollet Mall, Suite 700
                     Minneapolis, MN 55403-2445
                     Attention:  Vice President and General Counsel
                     FAX:  (612)373-5392

       Copy to:
                     Joseph T. Kinning, Esq.
                     Gray, Plant, Mooty, Mooty & Bennett, P.A.
                     3400 City Center
                     33 South Sixth Street
                     Minneapolis, MN 55402-3796

All notices and other communications required or permitted under this Agreement
shall be effective upon delivery. Any Party may from time to time change its
address for the purpose of notices to that Party by a similar notice specifying
a new address.

                                       4

<PAGE>   5

       10.    No Third Party Beneficiaries. Nothing in this Agreement, whether
express or implied, is intended to confer any rights or remedies under or by
reason of this Agreement on any persons other than the Parties and their
respective permitted successors and assigns.

       11.    No Joint Venture. Nothing in this Agreement is intended to create
an association, trust, partnership, or joint venture between the Parties, or
impose a trust, partnership or fiduciary duty, obligation, or liability on or
with respect to either Party.

       12.    Conflicts. In the event of any conflicts or inconsistencies
between the terms of this Agreement and the terms of the Purchase and Sale
Agreement, the terms of this Agreement will control.

       13.    Amendment. No waiver and no modification or amendment of any
provisions of this Agreement shall be effective unless made in writing and duly
signed by the Parties.

       14.    Counterparts.  This Agreement may be executed in one or more
counterparts, each of which is an original, but all of which together
constitute one and the same instrument.

       15.    Governing Law. The validity, interpretation and effect of this
Agreement are governed by and will be construed in accordance with the laws of
the State of Connecticut without regard to its principles of conflicts of law.

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

                                          THE CONNECTICUT LIGHT AND
                                          POWER COMPANY

                                          By:  /s/ John B. Keane
                                              ---------------------------------
                                              John B. Keane
                                              Vice President -
                                              Generation Divestiture

                                          NRG ENERGY, INC.

                                          By:  /s/ Michael J.  Young
                                              ---------------------------------
                                              Michael J.  Young
                                              Attorney in Fact

                                       5

<PAGE>   6

                                          CONNECTICUT JET POWER LLC -

                                          By: NRG Connecticut Generating LLC
                                              Its Sole Member

                                              By: /s/ Bryan Riley
                                                  -----------------------------
                                                  Bryan Riley
                                                  Vice President

                                          DEVON POWER LLC

                                          By: NRG Connecticut Generating LLC
                                              Its Sole Member

                                              By: /s/ Bryan Riley
                                                  -----------------------------
                                                  Bryan Riley
                                                  Vice President

                                          MIDDLETOWN POWER LLC

                                          By: NRG Connecticut Generating LLC
                                              Its Sole Member

                                              By: /s/ Bryan Riley
                                                  -----------------------------
                                                  Bryan Riley
                                                  Vice President

                                          MONTVILLE POWER LLC

                                          By: NRG Connecticut Generating LLC
                                              Its Sole Member

                                              By: /s/ Bryan Riley
                                                  -----------------------------
                                                  Bryan Riley
                                                  Vice President

                                       6

<PAGE>   7

                                          NORWALK POWER LLC

                                          By: NRG Connecticut Generating LLC
                                              Its Sole Member

                                              By:  /s/ Bryan Riley
                                                  -----------------------------
                                                  Bryan Riley
                                                  Vice President

                                          NRG DEVON OPERATIONS, INC.

                                          By:  /s/ Bryan Riley
                                              ---------------------------------
                                              Bryan Riley
                                              Vice President

                                          NRG MIDDLETOWN OPERATIONS, INC.

                                          By:  /s/ Bryan Riley
                                              ---------------------------------
                                              Bryan Riley
                                              Vice President

                                          NRG MONTVILLE OPERATIONS, INC.

                                          By:  /s/ Bryan Riley
                                              ---------------------------------
                                              Bryan Riley
                                              Vice President

                                       7

<PAGE>   8

                                          NRG NORWALK HARBOR
                                          OPERATIONS, INC.

                                          By: /s/ Bryan Riley
                                              ---------------------------------
                                              Bryan Riley
                                              Vice President

                                       8<PAGE>   1
                                                                  EXHIBIT 10.73

                          PURCHASE AND SALE AGREEMENT

                                    BETWEEN

                                NRG ENERGY, INC.

                                      AND

                    THE CONNECTICUT LIGHT AND POWER COMPANY

                                  JULY 1, 1999

<PAGE>   2

                          PURCHASE AND SALE AGREEMENT

       This Purchase and Sale Agreement (the "Agreement") is entered into on
July 1, 1999, by and between NRG Energy, Inc., a Delaware corporation (the
"Buyer"), and The Connecticut Light and Power Company, a Connecticut
corporation (the "Seller"). The Buyer and the Seller are each referred to
herein as a "Party" or, collectively as the "Parties."

       This Agreement contemplates a transaction in which the Buyer will
purchase certain assets of the Seller (as defined in Section 2.1 below) in
consideration of the Purchase Price (as defined in Section 2.5 below).

       Now, therefore, in consideration of the premises and the mutual promises
herein made, and in consideration of the representations, warranties, and
covenants herein contained, the Parties agree as follows:

1.     Definitions

       "Acquired Assets" has the meaning set forth in Section 2.1.

       "Acquired Assets Employees" has the meaning set forth in Section 5.7(b).

       "Acquired Assets Employees' Records" mean all personnel records
maintained by Seller relating to the Acquired Assets Employees to the extent
such files contain (i) names, addresses, dates of birth, job titles and
descriptions; (ii) starting dates of employment; (iii) salary and benefits
information; (iv) resumes and job applications; and (v) any other documents
that the Seller is not prohibited by Law to deliver to the Buyer. To the extent
the consent of an Acquired Assets Employee is required in order for the Seller
to deliver a document which is part of the Acquired Assets Employees' Records
to the Buyer, the Seller agrees to use reasonable efforts to secure such
consent.

       "Act" means "An Act Concerning Electric Restructuring," Public Act No.
98-28.

       "Affiliate" has the meaning set forth in Rule 12b-2 of the regulations
promulgated under the Securities Exchange Act.

       "Agreement" has the meaning set forth in the preamble above.

<PAGE>   3

       "Air Emission Credit", otherwise known as an Emission Reduction Credit
or ERC, means (i) a reduction of emissions of carbon dioxide, nitrogen oxides
or volatile organic compounds from a stationary, mobile or area source that is
certified by a Governmental Authority as real, quantifiable, surplus, permanent
and enforceable, and is recorded as such; or (ii) a reduction of emissions of
nitrogen oxides below the most stringent applicable emissions rate achieved
during the 1997 or 1998 control periods and approved by a Governmental
Authority.

       "Allowance" means (i) an "allowance" to emit up to one ton of sulfur
dioxide as defined in Section 7651 a(3) of the Clean Air Act; or (ii) the
limited authorization to emit up to one ton of nitrogen oxides during a
specified control period as defined in R.C.S.A. Section 226-174-22a.

       "Asset Demarcation Agreement" means the agreement between the Parties
evidencing their agreement as to the demarcation of ownership with respect to
certain assets not situated wholly on real property owned, or to be owned, by
either the Seller or the Buyer, in substantially the form attached hereto as
Exhibit G.

       "Assignment and Assumption Agreement" means the agreement between the
Parties by which the Seller shall assign certain rights, liabilities and
obligations and the Buyer shall assume the Assumed Liabilities, in
substantially the form attached hereto as Exhibit C.

       "Assumed Liabilities" has the meaning set forth in Section 2.3.

       "Bill of Sale" means the form of bill of sale by which the title to
personal property shall be conveyed to the Buyer, substantially in the form
attached hereto as Exhibit B.

       "Business Day" means any day other than a Saturday, Sunday or day on
which banks are legally closed for business in Hartford, Connecticut or New
York, New York.

       "Buyer" has the meaning set forth in the preamble above.

       "Buyer Material Adverse Effect" means any material adverse change in, or
effect on, the business, financial condition, operations, results of operations
or future prospects of the Buyer, including any change or effect that is
materially adverse to the Buyer's ability to own, operate or use the Acquired
Assets as so owned, operated

                                       2

<PAGE>   4

and used by the Seller prior to the Effective Date, taken as a whole; provided
that any change or effect that is cured prior to Closing shall not be
considered a Buyer Material Adverse Effect; and provided, further, that any
change or effect having a value of five percent of the Purchase Price or less
shall not be deemed to be a Buyer Material Adverse Effect.

       "Buyer's Regulatory Approvals" means those approvals identified on
Schedule 6.1(c) attached hereto to be obtained by the Buyer as a condition to
the Buyer's obligations under this Agreement.

       "Capital Commitments" means all binding contractual commitments to make
capital expenditures relating to the Acquired Assets, Facilities or Sites
incurred by the Seller during the Interim Period that extend beyond the Closing
Date, whether or not relating to the Pre-Approved Capital Expenditures.

       "Cash" means cash and cash equivalents (including marketable securities
and short term investments) calculated in accordance with GAAP.

       "C.G.S." means Connecticut General Statutes.

       "Closing" has the meaning set forth in Section 2.9.

       "Closing Adjustment" has the meaning set forth in Section 2.6(c).

       "Closing Date" has the meaning set forth in Section 2.9.

       "Closing Purchase Price" has the meaning set forth in Section 2.5.

       "Closing Statement" has the meaning set forth in Section 2.6(d).

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

       "Collective Bargaining Agreement" has the meaning set forth in Section
5.7(a).

       "Commercially Reasonable Efforts" means efforts which are reasonably
within the contemplation of the Parties at the Effective Date and which do not
require the performing Party to expend any funds other than expenditures which
are

                                       3

<PAGE>   5

customary and reasonable in transactions of the kind and nature contemplated by
this Agreement in order for the performing Party to satisfy its obligations
hereunder.

       "Contracts" has the meaning set forth in Section 2.1(f).

       "Deed" means the form of deed by which the Real Property shall be
conveyed to the Buyer, substantially in the form attached hereto as Exhibit
A-1.

       "Disclosing Party" has the meaning set forth in the definition of
Proprietary Information.

       "DPUC" means the Connecticut Department of Public Utility Control.

       "DPUC Approval" means the order or orders of the DPUC approving this
Agreement and. the Related Agreements and the consummation of the transactions
contemplated hereby and thereby and all related matters, including without
limitation approval of the amount of the proceeds of the sale of the Acquired
Assets, such order or orders to be in a form which is final, unconditional and
unappealable by any Person, including exhaustion of all administrative and
judicial appeals or remedies and the running of time periods and statutes of
limitation for rehearing and judicial review.

       "Effective Date" means the date on which this Agreement has been duly
executed and validly delivered by the Parties.

       "Employee Benefit Plan" means any (a) nonqualified deferred compensation
or retirement plan or arrangement which is an Employee Pension Benefit Plan,
(b) qualified defined contribution retirement plan or arrangement which is an
Employee Pension Benefit Plan, (c) qualified defined benefit retirement plan or
arrangement which is an Employee Pension Benefit Plan (including any
Multiemployer Plan), (d) Employee Welfare Benefit Plan or material fringe
benefit plan or program or (e) profit sharing, bonus, stock option, stock
purchase, equity, stock appreciation, deferred compensation, incentive,
severance plan or other benefit plan.

       "Employee Pension Benefit Plan" has the meaning set forth in ERISA
Section 3(2).

       "Employee Welfare Benefit Plan" has the meaning set forth in ERISA
Section 3(1).

                                       4

<PAGE>   6

       "Environment" means soil, land surface or subsurface strata, real
property, surface waters, groundwater, wetlands, sediments, drinking water
supply, ambient air (including indoor air) and any other environmental medium
or natural resource.

       "Environmental Claim" means a claim by any Person based upon a breach of
Environmental Laws or an Environmental Liability alleging loss of life, injury
to persons, property or business, damage to natural resources or trespass to
property, whether or not such loss, injury, damage or trespass arose or was
made manifest before the Closing Date or arises or becomes manifest after the
Closing Date.

       "Environmental Laws" means all applicable Laws and any binding
administrative or judicial interpretations thereof relating to: (a) the
regulation, protection and use of the Environment; (b) the conservation,
management, development, control and/or use of land, natural resources and
wildlife; (c) the management, manufacture, possession, presence, use,
generation, transportation, treatment, storage, disposal, release, threatened
release, abatement, removal, remediation, or handling of, or exposure to, any
Hazardous Substances; or (d) noise; and includes, without limitation, the
following federal statutes (and their implementing regulations): the
Comprehensive Environmental Response, Compensation and Liability Act of 1980,
as amended; the Solid Waste Disposal Act, as amended, 42 U.S.C. Section 6901 et
seq.; the Federal Water Pollution Control Act of 1972, as amended, 33 U.S.C.
Section 1251 et seq.; the Toxic Substances Control Act of 1976, as amended, 15
U.S.C. Section 2601 et. seq.; the Clean Air Act of 1966, as amended, 42 U.S.C.
Section 7401 et seq.; the Federal Insecticide, Fungicide, and Rodenticide Act,
as amended, 7 U.S.C. Section 136 et seq.; the Coastal Zone Management Act of
1972, as amended, 16 U.S.C. Section 1451 et seq.; the Oil Pollution Act of
1990, as amended, 33 U.S.C. Section 2701 et. seq.; the Rivers and Harbors Act
of 1899, as amended, 33 U.S.C. Section 401 et seq.; the Hazardous Materials
Transportation Act, as amended, 49 U.S.C. Section 1801 et seq.; the Endangered
Species Act of 1973, as amended, 16 U.S.C. Section 1531 et. seq.; the
Occupational Safety and Health Act of 1970, as amended, 29 U.S.C. Section 651
et seq.; and the Safe Drinking Water Act of 1974, as amended, 42 U.S.C. Section
300(f) et seq.; and all analogous or comparable state statutes and regulations,
including, without limitation, the Connecticut Transfer Act, as amended, CGS
Section 22a-134 et seq.; and the Connecticut Remediation Standard Regulations,
RCSA Section 22a-133k-1 et seq.

       "Environmental Liabilities" means any Liability under or related to
Environmental Laws arising as a result of or in connection with (i) any
violation or alleged violation of Environmental Law, prior to, on or after the
Closing Date, with respect to the ownership, operation or use of the Acquired
Assets; (ii) any Environmental

                                       5

<PAGE>   7

Claims caused (or allegedly caused) by the presence or Release of Hazardous
Substances at, on, in, under, adjacent to or migrating from the Acquired Assets
prior to, on or after the Closing Date,; (iii) the investigation and/or
Remediation (whether or not such investigation or Remediation commenced before
the Closing Date or commences after the Closing Date) of Hazardous Substances
that are present or have been Released prior to, on or after the Closing Date
at, on, in, under, adjacent to or migrating from the Acquired Assets; (iv)
compliance with Environmental Laws on or after the Closing Date with. respect
to the ownership or operation or use of the Acquired Assets; (v) any
Environmental Claim arising from or relating to the off-site disposal,
treatment, storage, transportation, discharge, Release or recycling, or the
arrangement for such activities, of Hazardous Substances, on or after the
Closing Date, in connection with the ownership or operation of the Acquired
Assets; and (vi) the investigation and/or remediation of Hazardous Substances
that are generated, disposed, treated, stored, transported, discharged,
Released, recycled, or the arrangement of such activities, on or after the
Closing Date, in connection with the ownership or operation of the Acquired
Assets, at any Offsite Disposal Facility.

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

       "Estimated Adjustment" has the meaning set forth in Section 2.6(c).

       "Estimated Closing Statement" has the meaning set forth in Section
2.6(c).

       "Event of Loss" has the meaning set forth in Section 5.10.

       "Excluded Assets" has the meaning set forth in Section 2.2.

       "Excluded Liabilities" has the meaning set forth in Section 2.4.

       "Exhibits" means the exhibits to this Agreement.

       "Facilities" means the generating facilities identified by name on
Schedule 2.1(h) attached hereto.

       "FERC" means the Federal Energy Regulatory Commission, or its regulatory
successor, as applicable.

       "FERC Applications" has the meaning set forth in Section 5.11.

                                       6

<PAGE>   8

       "FIRPTA Affidavit" means the affidavit to be delivered by the Parties at
Closing pursuant to Section 1445(b)(2) of the Code, to establish that each
Party is not a "foreign person" within the meaning of that Section.

       "GAAP" means United States generally accepted accounting principles as
in effect from time to time.

       "Generation Support Services Agreement" means an agreement between the
Buyer and. Northeast Generation Services, Inc. under which the Buyer can
contract, at the Buyer's option, for the provision of certain services to the
Buyer after the Closing.

       "Good Utility Practices" means any of the practices, methods and acts
engaged in or approved by a significant portion of the electric utility
industry during the relevant time period, or any of the practices, methods or
acts 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 good business practices,
reliability, safety and expedition. Good Utility Practices are 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.

       "Governmental Authority" means any federal, state, local or other
governmental, regulatory or administrative agency, commission, department,
board, or other governmental subdivision, court, tribunal, arbitral body or
other governmental authority, but excluding the Buyer and any subsequent owner
of the Sites (if otherwise a Governmental Authority under this definition).

       "Granted Easements" means the easements to be granted to the Buyer
pursuant to instruments in the form attached hereto as Exhibit A-3 for the
location of the Remote ICUs on T&D Assets of the Seller.

       "Group Health Plan" has the meaning set forth in Section 5000(b)(1) of
the Code.

       "Guaranty" means the form of guaranty in substantially the form attached
hereto as Exhibit F.

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

                                       7

<PAGE>   9

       "Hazardous Substance" means (a) any petrochemical or petroleum products,
oil, waste oil, asbestos in any form that is or could become friable, urea
formaldehyde foam insulations, lead-based paint and polychiorinated biphenyls;
(b) any products, mixtures, compounds, materials or wastes, air emissions,
toxic substances, wastewater discharges and any chemical, material or substance
that may give rise to liability pursuant to, or is listed or regulated under,
or the human exposure to which or the Release of which is controlled or limited
by applicable Environmental Laws; and (c) any materials or substances defined
in Environmental Laws as "hazardous", "toxic", "pollutant", or "contaminant",
or words of similar meaning or regulatory effect.

       "Improvements" means all buildings, structures (including all fuel
handling and storage facilities), machinery and equipment, fixtures,
construction in progress, including all piping, cables and similar equipment
forming part of the mechanical, electrical, plumbing or HVAC infrastructure of
any building, structure or equipment, and including all generating units,
located on and affixed to the Sites.

       "Indemnified Party" has the meaning set forth in Section 9.6(a).

       "Indemnifying Party" has the meaning set forth in Section 9.6(a).

       "Independent Appraiser" has the meaning set forth in Section 2.7.

       "Initial Purchase Price" has the meaning set forth in Section 2.5.

       "Inspections" means all tests, reviews, examinations, inspections,
investigations, verifications, samplings and similar activities conducted by
any Party or such Party's agents or representatives with respect to the
Acquired Assets prior to the Closing.

       "Interconnection Agreement" means the agreement between the Parties in
substantially the form attached hereto as Exhibit E.

       "Interim Period" means that period of time commencing on the Effective
Date and ending on the Closing Date.

       "Inventory" or "Inventories" means fuel inventories, materials, spare
parts, consumable supplies and chemical and gas inventories located at the
Sites, in transit to the Sites or identified in any Schedule.

                                       8

<PAGE>   10

       "ISO New England" means ISO New England, Inc., the independent system
operator as established or designated by NEPOOL.

       "Knowledge" means the actual, current knowledge, after due inquiry, of
the corporate officers charged with responsibility for the particular function
at the date of this Agreement, or, with respect to any certificate delivered
pursuant to this Agreement, the date of delivery of the certificate.

       "Laws" means all laws, rules, regulations, codes, injunctions,
judgments, orders, decrees, rulings, interpretations, constitution, ordinance,
common law, or treaty, of any federal, state, local municipal and foreign,
international, or multinational government or administration and related
agencies.

       "Leases" has the meaning set forth in Section 2. 1(c).

       "Liability" or "Liabilities" means any liability or obligation (whether
known or unknown, whether asserted or unasserted, whether absolute or
contingent, whether accrued or unaccrued, whether liquidated or unliquidated,
whether incurred or consequential and whether due or to become due), including
any liability for Taxes.

       "Lien" means the Mortgage Indenture and any other mortgage, pledge,
lien, security interest, charge, claim, equitable interest, encumbrance,
restriction on transfer, conditional sale or other title retention device or
arrangement (including, without limitation, a capital lease), transfer for
security for the payment of any indebtedness, or restriction on the creation of
any of the foregoing, whether relating to any property or right or the income
or profits therefrom; provided, however, that the term "Lien" shall not include
any of the following "Permitted Encumbrances": (i) Liens for Taxes or other
charges or assessments by any Governmental Authority to the extent that the
payment thereof is not in arrears or otherwise due or is being contested in
good faith; (ii) encumbrances in the nature of zoning restrictions, building
and land use laws, ordinances, orders, decrees, restrictions or any other
conditions imposed by any Governmental Authority; (iii) easements (including
without limitation, the Reserved Easements and any other easement or like right
granted by an instrument executed in connection with this Agreement or the
Related Agreements or the transactions contemplated hereby or thereby, but
excluding such encumbrances that secure indebtedness), rights, restrictions,
title imperfections and similar matters including such matters as are set forth
in any applicable FERC license or exemption on the uses of property if the same
do not materially detract from the operation or use of such property in the
business of the Seller as conducted

                                       9

<PAGE>   11

on the Effective Date; (iv) deposits or pledges made in connection with, or to
secure payment of, worker's compensation, unemployment insurance, old age
pension programs mandated under applicable laws or other social security
regulations; (v) statutory or common law liens in favor of carriers,
warehousemen, mechanics and materialmen, statutory or common law liens to
secure claims for labor, materials or supplies to the Acquired Assets and other
like liens, which, in the case of clauses (i) through (v), inclusive, secure
obligations to the extent that payment thereof is not in arrears or otherwise
due and which have been incurred under Good Utility Practices; (vi) any Lien
with respect to the Acquired Assets that arises under Good Utility Practices
and is not material to the operation or use of the Acquired Assets in the
business of the Seller as conducted on the Effective Date; (vii) any Lien or
title imperfection with respect to the Acquired Assets created by or resulting
from any act or omission of the Buyer; (viii) all exceptions set forth in the
"Title Commitments" or discoverable based on a review of an accurate survey of
the Sites or the land records of the respective towns in which the Sites are
located; (ix) matters set forth on Schedule 2. 1(a)(ii); and (x) the Norwalk
Harbor Conservation Easement.

       "Locals" means the International Brotherhood of Electrical Workers,
Local Union Nos. 420 and 457.

       "Losses" has the meaning set forth in Section 9.3.

       "Major Loss" has the meaning set forth in Section 5.10(b).

       "Material Adverse Effect" means any change in, or effect on, the
Acquired Assets that is materially adverse to the operations or condition of
the Acquired Assets as operated by the Seller on the Effective Date, taken as a
whole, other than any such change or effect resulting from (a) changes in the
international, national, regional or local wholesale or retail markets for
electric power or fuel used in connection with the Acquired Assets; (b) changes
in the North American, national, regional or local electric transmission
systems or the operation thereof or the costs imposed on generators of
electricity in connection with the use of such electric transmission systems;
or (c) any order of any Governmental Authority, or legislation applicable to
providers of generation, transmission or distribution of electricity generally
that imposes restrictions, regulations or other requirements thereon; provided
that any change or effect that is cured prior to Closing shall not be
considered a Material Adverse Effect.

                                       10

<PAGE>   12

       "Mortgage Indenture" means that certain Indenture of Mortgage and Deed
of Trust between the Seller and Bankers Trust Company, as Trustee, dated as of
May 1, 1921, as supplemented and amended.

       "Multiemployer Plan" has the meaning set forth in ERISA Section 3(37).

       "NEPOOL" means the New England Power Pool, established by the NEPOOL
Agreement, or its successor.

       "NEPOOL Agreement" means the New England Power Pool Agreement, dated
September 1, 1971, as amended by the Restated New England Power Pool Agreement
filed with FERC on July 22, 1998, as finally approved by FERC and as further
amended from time to time.

       "Non-Represented Employees" has the meaning set forth in Section 5.7(b).

       "Norwalk Harbor Conservation Easement" means the conservation easement
granted by the Seller to the State of Connecticut Department of Environmental
Protection with respect to the Norwalk Harbor Station set forth in Schedule D
to the Purchase and Sale Agreement dated March 31, 1999 between the Seller and
the State of Connecticut Department of Environmental Protection.

       "Offsite Disposal Facility" means a location, other than a Facility or a
Site, which receives or received Hazardous Substances for disposal by the
Seller prior to the Closing Date or by the Buyer on or after the Closing Date.

       "Party" and "Parties" have the meanings set forth in the preamble above.

       "Permits" means all certificates, licenses, permits, approvals,
consents, orders, decisions and other actions of a Governmental Authority
pertaining to a particular Acquired Asset, or the ownership, operation or use
thereof.

       "Permitted Encumbrances" has the meaning set forth in the definition of
Lien.

       "Person" means an individual, a partnership, a corporation, an
association, a joint stock company, a trust, a joint venture, a limited
liability company, an unincorporated organization, or a governmental entity (or
any department, agency, or political subdivision thereof).

                                       11

<PAGE>   13

       "Pre-Approved Capital Expenditures" means those capital expenditures set
forth on Schedule 5.3.

       "Proprietary Information" means all information about either Party (the
"Disclosing Party") or its properties or operations furnished to the other
Party (the "Receiving Party") or its Representatives by the Disclosing Party or
its Representatives, after the date hereof, regardless of the manner or medium
in which it is furnished. Proprietary Information does not include information
that (a) is or becomes generally available to the public, other than as a
result of a disclosure by the Receiving Party or its Representatives in
violation of this Agreement; (b) was available to the Receiving Party on a
nonconfidential basis prior to its disclosure by the Disclosing Party or its
Representatives; (c) becomes available to the Receiving Party on a
nonconfidential basis from a Person, other than the Disclosing Party or its
Representatives, who, to the Receiving Party's actual knowledge, is not
otherwise bound by a confidentiality agreement with the Disclosing Party or its
Representatives, or is not otherwise under any obligation to the Disclosing
Party or any of its Representatives not to transmit the information to the
Receiving Party or its Representatives, or (d) the Disclosing Party discloses
to others on a non-confidential basis.

       "Purchase Price" has the meaning set forth in Section 2.5.

       "Purchase Price Adjustment" has the meaning set forth in Section 2.6.

       "Real Property" has the meaning set forth in Section 2.1(a).

       "Receiving Party" has the meaning set forth in the definition of
Proprietary Information.

       "Related Agreements" means the Assignment and Assumption Agreement, the
Bill of Sale, the Deed, the Property Tax Agreement, the Interconnection
Agreement, the Guaranty, the Generation Support Services Agreement, the Release
of Mortgage Indenture, the Asset Demarcation Agreement, the Reserved Easement
and the Granted Easement.

       "Release" means any actual, threatened or alleged spilling, leaking,
pumping, pouring, emitting, dispersing, emptying, discharging, injecting,
escaping, leaching, dumping, or disposing of any Hazardous Substance into the
Environment that may cause an Environmental Liability (including the disposal
or abandonment of barrels,

                                       12

<PAGE>   14

containers, tanks or other receptacles containing or previously containing any
Hazardous Substance).

       "Release of Mortgage Indenture" means the form of release substantially
in the form attached hereto as Exhibit H.

       "Remediation" means any or all of the following activities to the extent
required to address the presence or Release of Hazardous Substances: (a)
monitoring, investigation, assessment, treatment, cleanup containment, removal,
mitigation, response or restoration work as well as obtaining any permits,
consents, approvals or authorizations of any Governmental Authority necessary
to conduct any such activity; (b) preparing and implementing any plans or
studies for any such activity; (c) obtaining a written notice from a
Governmental Authority with competent jurisdiction under Environmental Laws or
a written opinion of a Licensed Environmental Professional (as defined in
C.G.S. Section 22a-133v.) as contemplated by the relevant Environmental Laws
and in lieu of a written notice from a Governmental Authority, that no material
additional work is required; and (d) any other activities reasonably determined
by a Party to be necessary or appropriate or required under Environmental Laws.

       "Remote ICUs" means the internal combustion generating units located at
certain substations owned by the Seller and included as part of the Facilities,
as identified by name on Schedule 2.1(h).

       "Representative" means, as to any Person, such Person's Affiliates and
its and their directors, officers, employees, agents, advisors (including,
without limitation, financial advisors, counsel and. accountants).

       "Represented Employees" has the meaning set forth in Section 5.7(a).

       "Reserved Easements" means easements to be reserved by the Seller with
respect to certain T&D Assets and associated telecommunications facilities
located on the site of the Acquired Assets, as set forth in Schedule 2.1(a)
hereto, to be reserved in the Deeds by language substantially in the form
attached hereto as Exhibit A-2.

       "R.C.S.A." means Regulations of Connecticut State Agencies.

       "Schedule" means a schedule to this Agreement.

                                       13

<PAGE>   15

       "SEC" means the Securities and Exchange Commission.

       "Securities Act" means the Securities Act of 1933, as amended.

       "Securities Exchange Act" means the Securities Exchange Act of 1934, as
amended.

       "Seller" has the meaning set forth in the preamble.

       "Seller's Regulatory Approvals" means those approvals identified on
Schedule 6.2(c) hereto to be obtained by the Seller as a condition to the
Seller's obligation to close under this Agreement.

       "Site" means the Real Property and Improvements forming a part of, or
used or usable in connection with, a Facility. Any reference to a Site shall
include, by definition, the surface and subsurface elements, including the
soils and groundwater present at such Site, and any reference to items "at the
Site" shall include all items "at, on, in, upon, over, across, under and
within" the Site.

       "T&D" means the transmission and distribution of electricity.

       "T&D Assets" means the transmission, distribution, communication,
substation and other assets necessary to current or future T&D Operations of
the Seller.

       "T&D Operations" means the process of conducting and supporting T&D.

       "Taking" has the meaning set forth in Section 5.10.

       "Tax" or "Taxes" means any federal, state, local, or foreign income,
gross receipts, license, payroll, employment, excise, severance, stamp,
occupation, premium, windfall profits, environmental (including taxes under
Code Section 59A), customs duties, capital stock, franchise, profits,
withholding, social security (or similar, including FICA), unemployment,
disability, real property, personal property, sales, use, transfer,
registration, value added, alternative or add-on minimum, estimated, or other
tax of any kind whatsoever, including any interest, penalty, or addition
thereto, whether disputed or not.

                                       14

<PAGE>   16

       "Tax Return" means any return, declaration, report, claim for refund, or
information return or statement relating to Taxes, including any schedule or
attachment thereto, and including any amendment thereof.

       "Third Party" means a Person who is not a Party, an Affiliate of a
Party, a Representative of a Party, a Representative of an Affiliate of a Party
or a shareholder of any of a Party, a Party's Affiliate or a Party's
Representative.

       "Third Party Claim" has the meaning set forth in Section 9.6(a).

       "Title Commitments" has the meaning set forth in Section 3.5.

       "Trademarks" means any trademarks, service marks, trade dress, and
logos, together with all translations, adaptations, derivations, and
combinations thereof and including all goodwill associated therewith.

       "Transferable Permits" has the meaning set forth in Section 3.6(b).

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

       "Year 2000 Computer Problem" means the failure or inability of any
hardware, software, or firmware product (including embedded microcontrollers in
non-computer equipment) to correctly differentiate between years, in different
centuries, which years end in the same two digits, or accurately process
date/time data (including, but not limited to, calculating, comparing, and
sequencing) from, into and between the twentieth and twenty-first centuries,
including leap year calculations.

2.     Acquisition of Assets by Buyer

       2.1.   Purchase and Sale of Assets. The Seller agrees to sell and
transfer to the Buyer, and the Buyer agrees to purchase from the Seller at the
Closing, subject to and upon the terms and conditions contained herein, free
and clear of any Lien, all of the right, title and interest of the Seller in
and to the following properties and assets owned by the Seller constituting, or
used in and necessary for the operation of, the Facilities (collectively, the
"Acquired Assets"):

              (a)    the real property, Improvements thereon, easements and
       other rights in real property described in Schedule 2.1(a)(i), but
       subject to the

                                       15

<PAGE>   17

       exceptions and encumbrances set forth in the Title Commitments and
       subject to the Permitted Encumbrances, including the matters set forth
       in Schedule 2.1(a)(ii) (the "Real Property");

              (b)    the machinery, equipment, furniture, boats, vehicles,
       intellectual property and other personal property owned by the Seller
       and located at the Facilities and Inventories (including without
       limitation the items of personal property described on Schedule 2.1.(b),
       all applicable warranties against manufacturers or vendors, to the
       extent that such warranties are transferable without further action by
       the Seller, and all items of personal property due under applicable
       warranties), in each case as in existence on the Effective Date, but
       excluding such items disposed of by the Seller in the ordinary course of
       business during the Interim Period, and including such additional items
       as may be acquired by the Seller for use in connection with the Acquired
       Assets in the ordinary course of business during the Interim Period;

              (c)    all rights with respect to leasehold interests and
       subleases and rights thereunder relating to real property set forth on
       Schedule 2.1. (c) (the "Leases");

              (d)    the Granted Easements for the Remote ICUs;

              (e)    all Permits relating to ownership or operation of the
       Facilities;

              (f)    those contracts, agreements and personal property leases
       which are material to the operation of the Facilities and which are set
       forth in Schedule 2.1.(f) (the "Contracts"), and all other contracts
       which relate exclusively to the operation of the Facilities; provided
       that the Seller shall retain the rights and interests under any Contract
       to the extent such rights and interests provide for indemnity and
       exculpation rights for pre-Closing occurrences for which the Seller
       remains liable under this Agreement;

              (g)    all books, operating records, engineering designs,
       blueprints, as-built plans, specifications, procedures, studies, reports
       and equipment repair, safety, maintenance or service records of the
       Seller relating specifically to the operation of the Facilities,
       including the Acquired Assets Employees' Records but expressly excluding
       financial records, employees

                                       16

<PAGE>   18

       records (other than the Acquired Assets Employees' Records) and books of
       account;

              (h)    the rights of the Seller to the use of the names of the
       Facilities set forth in Schedule 2.1(h);

              (i)    subject to the provisions of Section 2.8(c), the
       Allowances set forth on Schedule 2.1(i) (including those Allowances set
       forth on such Schedule held by the United States Environmental
       Protection Agency in its Special Allowance Reserve for the benefit of
       the Seller pursuant to the Clean Air Act);

              (j)    subject to the provisions of Section 2.8(c), the Air
       Emission Credits set forth on Schedule 2.1(j); and

              (k)    all rights of the Seller in and to any causes of action
       against a Third Party relating to any Assumed Liability, whether
       received as a payment or credit against future liabilities, including,
       without limitation, insurance proceeds, condemnation awards and cash
       payments under warranties covering the Acquired Assets to the extent
       such payments relate to Assumed Liabilities.

       2.2.   Excluded Assets. Notwithstanding anything to the contrary in this
Agreement, there shall be excluded from the Acquired Assets to be sold,
assigned, transferred, conveyed or delivered to the Buyer hereunder, and to the
extent in existence on the Effective Date or on the Closing Date, there shall
be retained by the Seller, any and all right, title or interest to the
following assets, properties and rights (collectively, the "Excluded Assets"):

              (a)    as identified on Schedule 2.2.(a) or in the Asset
       Demarcation Agreement, or any document or exhibit referred to or
       incorporated in the Asset Demarcation Agreement, the property comprising
       or constituting any or all of the T&D Assets located at the Sites
       (whether or not regarded as a "transmission", "distribution" or
       "generation" asset for regulatory or accounting purposes), including all
       switchyard facilities, substation facilities and support equipment, as
       well as all Permits and contracts, to the extent they relate to the T&D
       Assets, and those certain assets and facilities identified for use or
       used by the Seller or others pursuant to an agreement or agreements with
       the Seller for telecommunications purposes;

                                       17

<PAGE>   19

              (b)    the interests in real property covered by the Norwalk
       Harbor Conservation Easement and the rights of the Seller under the
       agreement related thereto including, without limitation, the rights of
       the Seller to receive the proceeds due to it under such agreement;

              (c)    all Cash, accounts and notes receivable, checkbooks and
       canceled checks, bank deposits and property or income tax receivables or
       any other Tax refunds to the extent allocable to a period ending on or
       before the Closing Date;

              (d)    all contracts, instruments or other agreements relating to
       the sale by the Seller of electric capacity or energy under wholesale
       rates, or otherwise subject to regulation by the FERC;

              (e)    all rights of the Seller in and to any causes of action
       against a Third Party relating to any period through the Closing Date,
       whether received as a payment or credit against future liabilities,
       including, without limitation, any rights or interests in respect of any
       refunds relating to property Taxes paid by the Seller for any period
       prior to the Closing Date, insurance proceeds, condemnation awards and
       cash payments under warranties covering the Acquired Assets to the
       extent such payments relate to warranty claims made by the Seller prior
       to the Closing Date, but excluding any such rights of the Seller to the
       extent the associated Third Party claims relate to an Assumed Liability;

              (f)    all rights of the Seller to the words "CL&P" and "The
       Connecticut Light and Power Company" and any Trademark which is composed
       of or comprises any derivative thereof; and

              (g)    those Allowances which the Seller has committed to retire
       or swap with a third party subject to the receipt of certain regulatory
       approvals, as set forth on Schedule 2.2(g) hereto.

       2.3.   Assumption of Liabilities. On the terms and subject to the
conditions set forth herein, from and after the Closing, the Buyer will assume
and satisfy or perform all of the Liabilities of the Seller in respect of, or
otherwise arising from the operation or use of the Acquired Assets, other than
the Excluded Liabilities (as set

                                       18

<PAGE>   20

forth in Section 2.4 below), including, without limitation, the following
Liabilities (the "Assumed Liabilities"):

              (a)    all Environmental Liabilities, other than the Excluded
       Liabilities (as set forth in Section 2.4 below);

              (b)    all Liabilities under (i) the Contracts, Leases, and the
       Transferable Permits in accordance with the terms thereof, (ii) the
       contracts, leases and other agreements entered into by the Seller with
       respect to the Acquired Assets which would be required to be disclosed
       on Schedule 2.1(c) or 2.1(f) but for the exception provided in clause
       (iii) of Section 3.8(a), in accordance with the terms thereof, and (iii)
       the contracts, leases, commitments and other agreements entered into by
       the Seller with respect to the Acquired Assets during the Interim Period
       consistent with the terms of this Agreement (including, without
       limitation, Capital Commitments, agreements with respect to Liabilities
       for real or personal property Taxes on any of the Acquired Assets or, to
       the extent such agreements do not allocate such Tax liability between
       the Acquired Assets and the Excluded Assets, all Tax liability under
       such agreements entered into by the Seller and any local government);
       except (x) in each case, to the extent such Liabilities, but for a
       breach or default by the Seller, would have been. paid, performed or
       otherwise discharged on or prior to the Closing Date, or to the extent
       the same arise out of any such breach or default, or to the extent the
       same relate to performance rendered to the Seller prior to the Closing
       Date and (y) as otherwise provided in Section 2.4(f);

              (c)    all Liabilities under the Permitted Encumbrances other
       than under or with respect to the exercise of the Reserved Easements;

              (d)    all Liabilities relating to Employees for which the Buyer
       is responsible under Section 5.7; and

              (e)    all other Liabilities expressly allocated to the Buyer in
       this Agreement or in any -of the Related Agreements. -

       2.4.   Excluded Liabilities. The Buyer shall not assume or be responsible
for the performance of any of the following Liabilities (collectively, the
"Excluded Liabilities"):

                                       19

<PAGE>   21

              (a)   any liability of the Seller in respect of or otherwise
       arising from the operation or use of the Excluded Assets or any other
       assets of the Seller that are not Acquired Assets;

              (b)    any Liability of the Seller including, without limitation,
       any Environmental Liability, in respect of or otherwise arising from the
       exercise of the Reserved Easements or the condition of the- property on
       which the Substations (as defined in the Reserved Easements) are
       located, including Hazardous Substances disposed of or Released at, on
       or under property on which the Substations are located;

              (c)    any Liability relating to the treatment, disposal,
       storage, discharge, Release, recycling or the arrangement for such
       activities at, or the transportation to, any Offsite Disposal Facility,
       by the Seller, prior to the Closing Date, of Hazardous Substances that
       were generated at the Sites, provided that for purposes of this Section,
       "Offsite Disposal Facility" does not include any location to which
       Hazardous Substances disposed of or Released at the Acquired Assets have
       migrated;

              (d)    any Liability of the Seller arising from the making or
       performance of this Agreement or a Related Agreement or the transactions
       contemplated hereby or thereby;

              (e)    any Liability of the Seller in respect of payment
       obligations for goods delivered or services rendered prior to the
       Closing Date or other Liabilities under contracts or leases which the
       Buyer has not assumed pursuant to Section 2.3(b);

              (f)    any Liability which is or would be required to be accrued
       by the Seller on a balance sheet of the Seller as of the Closing Date
       prepared in accordance with GAAP, other than those Liabilities-which
       are-expressly set forth as Assumed Liabilities in Sections 2.3(a), (b)
       and (c) hereof,

              (g)    any Liability of the Seller arising out of any Employee
       Benefit Plan established or maintained by the Seller or to which the
       Seller contributes or any Liability for the termination of any such
       Employee Benefit Plan;

             (h)     any Liability of the Seller for any compensation or any
       benefits, including, without limitation, vacation pay, severance pay,
       post-

                                       20

<PAGE>   22

       retirement benefits and COBRA coverage, accruing on or prior to the
       Closing Date under the terms or provisions of any Seller Employee
       Benefit Plan, the Collective Bargaining Agreement or any other
       agreement, plan, practice, policy, instrument or document relating to
       any of the Acquired Assets Employees, other than the Liabilities
       expressly assumed by the Buyer under Section 5.7;

              (i)    any Liability of the Seller relating to any cause of
       action against the Seller filed -with or pending before any court or
       administrative agency on the Closing Date;

              (j)    any Liability of the Seller for any fines or penalties
       imposed by a Governmental Authority resulting from (x) any investigation
       or proceeding pending on or prior to the Closing Date or (y) illegal
       acts or willful misconduct of the Seller on or prior to the Closing
       Date;

              (k)    any Environmental Liability to the extent such
       Environmental Liability arises out of or relates to any Governmental
       Authority's allegation and investigation of any criminal violations of
       Environmental Laws by the Seller of which the Seller has received formal
       written notification from such Governmental Authority on or prior to the
       Closing Date;

              (l)    any Environmental Liability to the extent such
       Environmental Liability derives from the same facts which form the basis
       of a conviction of, or plea of nondisclosure by, the Seller for a
       violation of Environmental Laws which conviction or plea arises out of a
       Governmental Authority's investigation of criminal violations of
       Environmental Laws by the Seller of which the Seller receives formal
       written notification from such Governmental Authority on or before the
       sixth anniversary of the Effective Date; and

              (m)    any Liability in respect of Taxes attributable to the
       Acquired Assets and any Liability in respect of Taxes attributable to
       the Acquired Assets for periods prior to and including the Closing Date,
       except those Taxes for which the Buyer is liable pursuant to Sections
       2.8 and 8.

       2.5.   Purchase Price. The Buyer agrees to assume the Assumed
Liabilities and pay to the Seller at the Closing an aggregate amount equal to
$___________ (the "Initial Purchase Price") plus or minus amounts to account
for (i) the Estimated Adjustment to the Initial Purchase Price to be made as of
the Closing under Section

                                       21

<PAGE>   23

2.6(c), and (ii) the pro rations to be made as of the Closing under Section
2.8(a), (the Initial Purchase Price, as so adjusted, shall be referred to
herein as the "Closing Purchase Price"). The Closing Purchase Price shall be
payable in cash by wire transfer to the Seller in accordance with written
instructions of the Seller given to the Buyer at least three (3) Business Days
prior to the Closing. Following the Closing, the Closing Purchase Price shall
be subject to adjustment pursuant to Sections 2.6(d) and 2.8(b), and the
Closing Purchase Price, as so adjusted pursuant to such Sections, shall be
herein referred to as the "Purchase Price."

       2.6.   Adjustments to Initial Purchase Price. The Initial Purchase Price
shall be increased or reduced as set forth in Sections 2.6(a), (b) and (c), and
the Closing Purchase Price shall be subject to adjustment as set forth in
Section 2.6(d). Such increases or reductions, as the case may be, shall be
referred to herein as the "Purchase Price Adjustment" and shall be determined
and paid as set forth below:

              (a)    the Initial Purchase Price shall be increased to account
       for the following items: -(i) the net book value of all Inventories held
       by the Seller as of the Closing Date; (ii) the cost incurred by the
       Seller in purchasing the vehicles identified as leased vehicles on
       Schedule 2.1(b); (iii) any Pre-Approved Capital Expenditures incurred by
       the Seller during the Interim Period; (iv) any other capital
       expenditures incurred by the Seller during the Interim Period
       necessitated by Good Utility Practice and to which the Buyer shall have
       consented pursuant to Section 5.3(f); (v) any operations and maintenance
       expenses paid for by the Seller during the Interim Period that the
       Seller would not have actually paid but for the Buyer's written request;
       and (vi) the costs (not in excess of $75,000) incurred by the Seller in
       having surveys of the Facilities performed in connection with the
       transactions contemplated hereby;

              (b)    the Initial Purchase Price shall be reduced to account for
       any Capital Commitments assumed by the Buyer that were not (i)
       Pre-Approved Capital Expenditures or (ii) capital expenditures
       necessitated by Good Utility Practice to which Buyer consented pursuant
       to Section 5.3(f);

              (c)    at least twenty (20) Business Days prior to the Closing
       Date, the Seller shall prepare and deliver to the Buyer an Estimated
       Closing Statement (the "Estimated Closing Statement") that shall set
       forth the Seller's best estimate of all adjustments to the Initial
       Purchase Price required by Sections 2.6(a) and 2.6(b) (the "Estimated
       Adjustment"). Within ten (10) Business

                                       22

<PAGE>   24

       Days following the delivery of the Estimated Closing Statement by the
       Seller to the Buyer, the Buyer may object in good faith to the Estimated
       Adjustment in writing. If the Buyer objects to the Estimated Adjustment,
       the Parties shall attempt to resolve such dispute by negotiation. If the
       Parties are unable to resolve such dispute before five (5) Business Days
       prior to the Closing Date (or if the Buyer fails to object to the
       Estimated Adjustment), the Initial Purchase Price shall be adjusted (the
       "Closing Adjustment") for the Closing by the amount of the Estimated
       Adjustment not in dispute; and

              (d)    within thirty (30) days following the Closing Date, the
       Seller shall prepare and deliver to the Buyer a closing statement that
       shall set forth the Seller's computation of the final Purchase Price
       Adjustment based on Sections 2.6(a) and (b) and the components thereof
       taking into account actual data (the "Closing Statement"). Within twenty
       (20) days following the delivery of the Closing Statement by the Seller
       to the Buyer, the Buyer may object to the Closing Statement in writing.
       The Seller agrees to cooperate with the Buyer to provide to the Buyer or
       the Buyer's Representatives information used to prepare the Closing
       Statement and information relating thereto. If the Buyer objects to the
       Closing Statement, the Parties shall attempt to resolve such dispute by
       negotiation. If the Parties are unable to resolve such dispute within
       twenty (20) days of any objection by the Buyer, the Parties shall
       appoint Ernst & Young who shall, at the Seller's and the Buyer's joint
       expense, review the Closing Statement and determine the appropriate
       Purchase Price Adjustment under this Section 2.6. The agreed upon
       Closing Statement or the finding of such accounting firm, as the case
       may be, shall be the Purchase Price Adjustment and shall be binding on
       the Parties. Upon the determination of the Purchase Price Adjustment,
       the Party owing a balance on account of the Purchase Price Adjustment
       shall deliver the balance due to the other Party no later than two (2)
       Business Days after such determination in immediately available funds or
       in any other manner as reasonably requested by the payee. The balance
       due shall be determined by offsetting against each Party's credits and
       debits arising from the Purchase Price Adjustment the credits and debits
       accorded to each Party in the Closing Statement on account of the
       Estimated Adjustment. The acceptance by the Buyer and the Seller of the
       Purchase Price Adjustment shall not constitute or be deemed to
       constitute a waiver of the rights of such Party in respect of any other
       provision of this Agreement.

                                       23

<PAGE>   25

       2.7.   Allocation of Purchase Price. The Buyer and the Seller shall use
their good faith best efforts to agree upon an allocation among the Acquired
Assets of the sum of the Purchase Price and the Assumed Liabilities consistent
with Section 1060 of the Code and the Treasury Regulations thereunder within
one hundred and twenty (120) days of the Effective Date (or such later date as
the Parties may mutually agree) but in no event fewer than thirty (30) days
prior to the Closing; provided, however, that twenty-six million
($26,000,000.00) dollars shall be treated as the prepayment by Buyer of the
Interconnection Facilities Charge attributable to Middletown Unit 4 under the
Interconnection Agreement for a period of thirty (30) years after the Closing
Date (it being understood and acknowledged by the Parties that such prepayment
shall not entitle Buyer to interconnect more than 402 MW of capacity during
such thirty (30) year period, and that the Buyer shall not seek to have such
prepayment reduced or refunded by appeal to FERC or otherwise). In the event
that FERC disapproves such prepayment, or raises objections that may result in
a delay of the Closing, then the purchase price shall be reduced by twenty-six
million ($26,000,000.00) dollars and Buyer shall be required to pay FERC Tariff
No. 9 charges with respect to Middletown Unit 4, notwithstanding this Section
2.7. The Buyer and the Seller may jointly agree to obtain the services of an
independent engineer or appraiser (the "Independent Appraiser") to assist the
Parties in determining the fair value of the Acquired Assets solely for
purposes of such allocation under this Section 2.7. If such an appraisal is
made, both the Buyer and the Seller agree to accept the Independent Appraiser's
determination of the fair value of the Acquired Assets. The cost of the
appraisal shall be borne equally by the Buyer and the Seller. Each of the Buyer
and the Seller agrees to file Internal Revenue Service Form 8594 and all
federal, state, local and foreign Tax Returns in accordance with such agreed
allocation. Each of the Buyer and the Seller shall report the transactions
contemplated by this Agreement and the Related Agreements for federal Income
Tax and all other Tax purposes in a manner consistent with the allocation
determined pursuant to this Section 2.7. Each of the Buyer and the Seller
agrees to provide the other promptly with any other information required to
complete Form 8594. Each of the Buyer and the Seller shall notify and provide
the other with reasonable assistance in the event of an examination, audit or
other proceeding regarding the agreed upon allocation of the Purchase Price.

       2.8.   Proration.

              (a)    The Buyer and the Seller agree that all of the items
       normally prorated in a sale of assets of the type contemplated by this
       Agreement, including those listed below, relating to the business and
       operations of the

                                       24

<PAGE>   26

       Acquired Assets, will be prorated as of the Closing Date, with the
       Seller liable to the extent such items relate to any period through the
       Closing Date, and the Buyer liable to the extent such items relate to
       periods after the Closing Date: (i) personal property, Real Property,
       occupancy and water Taxes, assessments and other charges, if any, on or
       associated with the Acquired Assets; (ii) rent, Taxes and other items
       payable by or to the Seller under any of the Contracts or Leases
       assigned to and assumed by the Buyer hereunder; (iii) any Permit,
       license, registration or fees with respect to any Transferable Permit
       associated with the Acquired Assets; and (iv) sewer rents and charges
       for water, telephone, electricity and other utilities. Subject to
       Section 2.8(b), below, not less than five (5) Business Days prior to the
       Closing Date, the Parties shall agree upon the sum of the net amount of
       the prorated amounts to which either the Seller or the Buyer shall be
       entitled pursuant to this Section 2.8(a) and the Initial Purchase Price
       shall be adjusted to reflect such net amount.

              (b)    If the amount of one or more Taxes, fees or other
       liabilities to be prorated in accordance with Section 2.8(a) is not
       known or determinable on or prior to the Closing Date, the amounts to be
       prorated upon the Closing in accordance with Section 2.8(a) shall be
       based upon the actual Taxes, fees or other liabilities for the preceding
       year (or appropriate period) for which such actual Taxes, fees or
       liabilities are available. The amount of Taxes, fees or other
       liabilities prorated upon the Closing pursuant to Section 2.8(a) shall
       be adjusted upon the request of either the Seller, on the one hand, or
       the Buyer, on the other hand, made within sixty (60) days of the date
       the actual amounts become available. The Seller and the Buyer agree to
       furnish each other with such documents and other records that may be
       reasonably re quested in order to confirm all adjustment and proration
       calculations made pursuant to this Section 2.8.

              (c)    Seller and Buyer shall pro rate the use of all Allowances
       and Air Emission Credits as of the Closing Date as follows: (i) Seller
       shall be entitled to an allocation of all Air Emission credits available
       for the year in which the Closing occurs which is equal to the number of
       days in the calendar year preceding and including the Closing Date
       divided by the number of days in such calendar year; (ii) if the Closing
       occurs prior to January 1, 2000, then the Seller shall not be entitled
       to an allocation of any Phase II SO(2) Allowances; (iii) if the Closing
       occurs on or after January 1, 2000, then the Seller shall be entitled to
       an allocation of Phase II SO(2) Allowances available

                                       25

<PAGE>   27

       for the year in which the Closing occurs equal to (a) the sum of the
       percent age allocations for all months prior to the month in which the
       Closing Date occurs, as set forth on Schedule 2.8(c), plus (b)-a
       percentage of the percent age allocation for the month in which the
       Closing Date occurs, as set forth on Schedule 2.8(c), as is equal to a
       fraction, the numerator of which is the number of days in such month
       preceding and including the Closing Date, and the denominator of which
       is the number of days in such month; and (iv) the Seller shall be
       entitled to an allocation of the NOx Allowances available for the year
       in which the Closing occurs equal to the number of days after May 1 and
       before October 31 in such year before which the Closing occurs (if any),
       divided by 153. To the extent that as of the Closing Date the Seller has
       used less than or more than the amount of Allowances and Air Emission
       Credits provided for hereinabove, the Seller shall pay to the Buyer or
       the Buyer shall pay to the Seller, as the case may be, at the Closing,
       an amount per Allowance or Air Emission Credit equal to the most recent
       current market price of that specific Allowance or Air Emission Credit
       as determined by the average of three regional air credit brokers'
       prices for the most recent transactions in the same Allowance or Air
       Emission Credit, as the case may be.

       2.9.   The Closing. Unless otherwise agreed to by the Parties, the
closing of the transactions contemplated by this Agreement (the "Closing")
shall take place at the offices of LeBoeuf, Lamb, Greene & MacRae, L.L.P., 125
West 55th Street, New York, New York, commencing at 9:00a.m. eastern time on
the date that is five (5) days (or, if the fifth day is not a Business Day,
then the next Business Day following such fifth day) following the date on
which all of the conditions set forth in Sections 6.1 and 6.2 have either been
satisfied or waived by the Party for whose benefit such condition exists, such
satisfaction or waiver to conform to Section 11.12. The date of Closing is
hereinafter called the "Closing Date" and shall be effective for all purposes
herein as of 11:59 p.m. Eastern clock time on the Closing Date.

       2.10.  Deliveries by the Seller at the Closing. At the Closing, the
Seller shall deliver the following to the Buyer, duly executed and properly
acknowledged, if appropriate:

              (a)    deeds for the Real Property and Improvements,
       substantially in the form attached hereto as Exhibit A-i and otherwise
       in a form suitable for recording;

                                       26

<PAGE>   28

              (b)    instruments conveying the Granted Easements, substantially
       in the form attached hereto as Exhibit A-3 and otherwise in a form
       suitable for recording;

              (c)    the Bill of Sale, substantially in the form attached
       hereto as Exhibit B, for the tangible personal property included in the
       Acquired Assets;

              (d)    the Assignment and Assumption Agreement, in the form
       attached hereto as Exhibit C, in recordable form if necessary;

              (e)    the Property Tax Agreement, substantially in the form
       attached hereto as Exhibit

              (f)    the Interconnection Agreement, in the form attached hereto
       as Exhibit E;

              (g)    the Asset Demarcation Agreement, in the form attached
       hereto as Exhibit G;

              (h)    if requested by the Buyer, the Generation Support Services
       Agreement, executed by Northeast Generation Services, Inc.;

              (i)    the Release of Mortgage Indenture, substantially in the
       form attached hereto as Exhibit H;

              (j)    a FIRPTA Affidavit executed by the Seller;

              (k)    certificates evidencing ownership of the Allowances in
       proper form for recordation with the Environmental Protection Agency;

              (l)    certificates of title for the vehicles and boats which are
       part of the Acquired Assets;

              (m)    all attornment agreements, notices and other documents and
       instruments required for the assignment or other transfer of the Leases
       from the Seller to the Buyer, which agreements, notices, documents and
       instruments shall, upon the reasonable request of the Buyer, be in
       recordable form;

                                       27

<PAGE>   29

              (n)    copies of all consents, waivers or approvals obtained by
       the Seller with respect to the Acquired Assets, the transfer of the
       Transferable Permits or the consummation of the transactions
       contemplated by this Agreement and the Related Agreements, to the extent
       specifically required under this Agreement or the Related Agreements;

              (o)    the Environmental Consultant Reliance Letter in the form
       of Exhibit I hereto, duly executed and addressed to the Buyer and any
       lending institution identified by the Buyer;

              (p)    a certificate from an authorized officer of the Seller,
       dated the Closing Date, to the effect that, to such officer's Knowledge,
       the conditions set forth in Sections 6.1(a), (b), (e) and (g) and
       Sections 6.2(c) and (d) have been satisfied;

              (q)    a copy, certified by the Secretary or an Assistant
       Secretary of the Seller, of corporate resolutions authorizing the
       execution and delivery of this Agreement and the Related Agreements and
       instruments attached as exhibits hereto and thereto, and the
       consummation of the transactions contemplated hereby and thereby;

              (r)    a certificate of the Secretary or an Assistant Secretary
       of the Seller which shall identify by name and title and bear the
       signature of the officers of the Seller authorized to execute and
       deliver this Agreement and the Related Agreements and instruments
       attached as exhibits hereto and thereto;

              (s)    an opinion or opinions from one or more counsel to the
       Seller (any of whom may be an employee of the Seller), dated the Closing
       Date and reasonably satisfactory in form to the Buyer and its counsel,
       covering substantially the matters set forth in Schedule 2.10(s); and

              (t)    all such other instruments of sale, transfer, conveyance,
       assignment or assumption as the Buyer and its counsel may reasonably
       request in connection with the sale of the Acquired Assets, provided
       however, that this Section 2.10(t) shall not require the Seller to
       prepare or obtain any surveys relating to the Real Property other than
       those previously provided to the Buyer.

                                       28

<PAGE>   30

       2.11.  Deliveries by the Buyer at the Closing. At the Closing, the Buyer
shall deliver to the Seller, properly executed and acknowledged, if
appropriate:

              (a)    the Closing Purchase Price;

              (b)    the Assignment and Assumption Agreement, in the form
       attached hereto as Exhibit C to this Agreement, duly executed by the
       Buyer, and if necessary or desirable to the Seller, in recordable form;

              (c)    the Property Tax Agreement, substantially in the form
       attached hereto as Exhibit B, for the tangible personal property
       included in the Acquired Assets;

              (d)    the Interconnection Agreement, in the form attached hereto
       as Exhibit E;

              (e)    the Asset Demarcation Agreement, in the form attached
       hereto as Exhibit G;

              (f)    if requested by the Buyer, the Generation Support Services
       Agreement;

              (g)    a certificate from an authorized officer of the Buyer,
       dated the Closing Date, to the effect that, to such officer's Knowledge,
       the conditions set forth in Sections 6.1(c) and (d) and Sections 6.2(a),
       (b), (e) and (g) have been satisfied;

              (h)    a copy, certified by the Secretary or Assistant Secretary
       of the Buyer, of resolutions authorizing the execution and delivery of
       this Agreement and the Related Agreements and instruments attached as
       exhibits hereto and thereto, and the consummation of the transactions
       contemplated hereby and thereby;

              (i)    a certificate of the Secretary or Assistant Secretary of
       the Buyer which shall identify by name and title and bear the signature
       of the officers of the Buyer authorized to execute and deliver this
       Agreement and the Related Agreements and instruments attached as
       exhibits hereto and thereto;

                                       29

<PAGE>   31

              (j)    one or more opinions from Gray, Plant, Mooty, Mooty &
       Bennett, P.A., counsel to the Buyer, dated the Closing Date and
       reasonably satisfactory in form to the Seller and its counsel, covering
       substantially the matters set forth in Schedule 2.11. (j);

              (k)    evidence of the Buyer's membership in NEPOOL; and

              (l)    all such other instruments of purchase, sale, transfer,
       conveyance, delivery, receipt, assignment or assumption as the Seller
       and its counsel may reasonably request in connection with the sale or
       purchase of the Acquired Assets or assumption of the Assumed
       Liabilities.

3.     Representations, Warranties and Disclaimers of the Seller. The Seller
represents and -warrants to the Buyer that the statements contained in this
Section 3 are correct and complete as of the Effective Date.

       3.1.   Organization of the Seller. The Seller is duly organized, validly
existing and in good standing under the laws of the State of Connecticut.
Copies of the charter and by~laws of the Seller, each as amended to date, have
been heretofore delivered to the Buyer and are accurate and complete.

       3.2.   Authorization of Transaction. The Seller has the power and
authority (including full corporate power and authority) to execute and deliver
this Agreement and the Related Agreements and, subject to receipt of all the
Seller's Regulatory Approvals, to perform its obligations hereunder and
thereunder. All corporate actions or proceedings to be taken by or on the part
of the Seller to authorize and permit the due execution and valid delivery by
the Seller of this Agreement and the Related Agreements and the instruments
required to be duly executed and validly delivered by the Seller pursuant
hereto and thereto, the performance by the Seller of its obligations hereunder
and thereunder, and the consummation by the Seller of the transactions
contemplated herein and therein, have been duly and properly taken. This
Agreement and the Related Agreements have been duly executed and validly
delivered by the Seller and constitute the legal, valid and binding obligation
of Seller, enforceable in accordance with their terms and conditions.

       3.3. Noncontravention. Subject to the Seller obtaining the Seller's
Regulatory Approvals, neither the execution and the delivery of this Agreement
or any of the Related Agreements, nor the consummation of the transactions
contemplated hereby and thereby (including the assignments and assumptions
referred to in

                                       30

<PAGE>   32

Sections 2.10(t) and 2.11(1) above), will (a) violate any constitution,
statute, regulation, rule, injunction, judgment, order, decree, ruling, charge,
license or other restriction of any Governmental Authority to which the Seller
or any of its property is subject or any provision of the charter or by-laws of
the Seller, or (b) conflict with, result in a breach of, constitute a default
under, result in the acceleration of, create in any party the right to
accelerate, terminate, modify, or cancel, or require any notice under any
agreement, contract, lease, license, instrument, or other arrangement to which
the Seller is bound or to which any of the Acquired Assets is subject (or
result in the imposition of any Lien upon any of the Acquired Assets), except
for matters that will not have a Material Adverse Effect or as disclosed in
Schedule 3.3 or any other Schedule.

       3.4.   Brokers' Fees. The Seller has no Liability or obligation to pay
any fees or commissions to any broker, finder or agent with respect to the
transactions contemplated by this Agreement for which the Buyer could become
liable or obligated.

       3.5.   Title to Acquired Assets. Except for Permitted Encumbrances, the
Seller has title to the Real Property to the extent, and only to the extent,
specified in the title policy commitments attached hereto on Schedule 3.5 (the
"Title Commitments"). Except as set forth in Schedule 3.5 and except for
Permitted Encumbrances, the Seller has good and valid title to the other
Acquired Assets.

       3.6.   Legal and Other Compliance; Permits.

              (a)    The Seller is in compliance with all current Laws
       applicable to the Acquired -Assets or the Seller's operation of the
       Acquired Assets the violation of which could have a Material Adverse
       Effect, other than as disclosed in Schedule 3.6 and other than with
       respect to matters covered by Section 3.12, below.

              (b)    Schedule 2.1(e) sets forth all Permits which are material
       to the ownership or operation of the Facilities, and also identifies
       those material Permits which are transferable or assignable by the
       Seller to the Buyer or which will pass to the Buyer as successor in
       -title to the Facilities by operation of applicable Laws (the
       "Transferable Permits").

       3.7.   Taxes. The Seller has filed all Tax Returns that it was required
to file, and has paid all Taxes that have become due as indicated thereon,
where the failure

                                       31

<PAGE>   33

so to file or pay could have a Material Adverse Effect, except where the Seller
is contesting the same in good faith by appropriate proceedings. There is no
unpaid Tax due and payable that could have a Material Adverse Effect on the
Buyer's ownership, operation or use of the Acquired Assets for which the Buyer
could become liable.

       3.8.   Contracts and Leases.

              (a)    Except (i) as listed in Schedule 2.1. (1) or 2.1. (c) or
       any other Schedule, (ii) for contracts, agreements, personal property
       leases, commitments, understandings or instruments which will expire
       prior to the Closing Date, and (iii) for agreements with suppliers
       entered into in the ordinary course of business for amounts not in
       excess of $100,000 individually or $250,000 in the aggregate and which
       have a term ending on or prior to December 31, 2000, the Seller is not a
       party to any written contract, agreement, personal property lease,
       commitment, understanding or instrument which (x) is material to the
       business or operations of the Acquired Assets or (y) which provides for
       the sale of any amount of capacity or energy from any of the Acquired
       Assets (whether or not entered into in the ordinary course of business).

              (b)    Except as disclosed in Schedule 3. 6(b) (i) each of the
       Con tracts constitutes a valid and binding obligation of the Seller,
       (ii) the Seller is not in default in any material respect under any of
       the Contracts and, to the Seller's Knowledge, the other parties to the
       Contracts are not in default in any material respect under any thereof,
       and (iii) the Contracts may be transferred to the Buyer pursuant to this
       Agreement and will continue in full force and effect thereafter, in each
       case without breaching the terms thereof or resulting in the forfeiture
       or impairment of any material rights thereunder.

       3.9.   Insurance. Except as set forth in Schedule 3.9, all material
policies of fire, liability, worker's compensation and other forms of insurance
owned or held by the Seller insuring the Acquired Assets are in full force and
effect, all premiums with respect thereto covering all periods up to and
including the date as of which this representation is being made have been paid
(other than retroactive premiums which may be payable with respect to
comprehensive general liability and worker's compensation insurance policies),
and no written notice of cancellation or termination has been received with
respect to any such policy which was not replaced on substantially similar
terms prior to the date of such cancellation. Except as described in Schedule
3.9, as of the date of-this Agreement, the Seller has not been refused any

                                       32

<PAGE>   34

insurance with respect to the Acquired Assets nor has its coverage been limited
by any insurance carrier to which it has applied for any such insurance or with
which it has carried insurance during the last five years.

       3.10.  Litigation. Except as disclosed in Schedule 3.10, no action,
suit, claim, demand or other proceeding is pending or, to Seller's Knowledge,
threatened that would be reasonably likely to result in a Material Adverse
Effect or that questions the validity of this Agreement or the Related
Agreements or of any action taken or to be taken pursuant to or in connection
with the provisions of this Agreement or the Related Agreements.

       3.11.  Employees. The Collective Bargaining Agreement referenced in
Schedule 3.11 is the only collective bargaining agreement to which the Seller
is a party and which governs terms and conditions of employment of employees of
the Seller whose employment relates primarily to the Acquired Assets. A true
and correct copy of the Collective Bargaining Agreement has heretofore been
delivered to the Buyer. Except as described in Schedule 3.11, and except as to
such matters as will not have a Material Adverse Effect: (i) the Seller has not
experienced any labor disputes, strikes or work stoppages by such employees due
to labor disagreements since 1971 and to the Seller's Knowledge none is
currently pending; (ii) to the Seller's Knowledge the Seller is in compliance
with all applicable Laws respecting employment and employment practices, equal
employment opportunity, occupational health and safety and affirmative action,
terms and conditions of employment and wages and hours; (iii) the Seller has
not received written notice from any Govern mental Authority of any unfair
labor practice charge, complaint or proceeding against the Seller pending or
threatened before the National Labor Relations Board or any other Governmental
Authority with respect to such employees; (iv) no arbitration proceeding
arising out of or under any collective bargaining agreement with respect to the
Acquired Assets is pending against the Seller; and (v) the Seller is in
compliance in all material respects with the Collective Bargaining Agreement.

       3.12.  Environmental Matters. During the two-year period preceding the
Effective Date, except as disclosed in Schedule 3.12, and except where such
matters, individually or in the aggregate, would not reasonably be expected to
have a Material Adverse Effect, (i) the Seller did not receive any written
notice from any Govern mental Authority that it is not in compliance with
Environmental Laws or failed to obtain material Permits required for the
ownership or operation of any Acquired Asset under Environmental Laws; (ii) the
Seller did not receive any written notice from any Governmental Authority that
any Acquired Asset is listed under the

                                       33

<PAGE>   35

Comprehensive Environmental Response, Compensation Liability Information
Systems or any similar state list; (iii) the Seller did not receive any written
notice from any Person alleging Liability for any Environmental Claims; and
(iv) the Seller was not required by any applicable Environmental Laws to place
any use or activities restrictions or any institutional controls on any
Acquired Assets. The Seller is not aware of any matters which could give rise
to Environmental Liabilities which would reasonably be expected to have a
Material Adverse Effect which are not disclosed or identified in the Phase I
and Phase II Reports referred to in Schedule 3.12.

       3.13.  Condemnation. Except as set forth in Schedule 3.13, the Seller
has received no written notice from any Governmental Authority of any pending
or threatened proceeding to condemn or take by power of eminent domain or
otherwise, by any Governmental Authority, all or any part of the Acquired
Assets, which would constitute a Major Loss. -

       3.14.  Regulation as a Utility. The Seller is a public service company
and an electric company under C.G. S. section 16-1(4) and 16-1(8), and is
subject to regulation as such by the DPUC, and is a "subsidiary company" of a
"holding company" which is registered under (and as those terms are defined in)
the Public Utility Holding Company Act of 1935, as amended.

       3.15.  Benefit Plans. Schedule 3.15 lists as of the Effective Date, all
Employee Benefit Plans established, sponsored, - - maintained or -contributed
to by (or to which there is an obligation to contribute of) the Seller in
respect of the Acquired Assets Employees. Accurate and complete copies of all
such Employee Benefit Plans (excluding Multiemployer Plans) have been made
available to the Buyer. Except as disclosed on Schedule 3.15, the Seller does
not contribute to, and has no obligation to contribute to, any Multiemployer
Plan. No liability under Title IV or Section 302 of ERISA or Section 412 of the
Code has been incurred by the Seller with respect to the Acquired Assets
Employees that has not been satisfied in full, and to the Seller's Knowledge no
condition exists that presents a material risk to the Seller of incurring any
such liability, other than liability for premiums due the Pension Benefit
Guaranty Corporation, which premiums have been paid.

       3.16.  Assets Used in Operation of the Facilities. The Acquired Assets
include all material assets and properties that are used by the Seller in the
operation of the Facilities on the Effective Date.

                                       34

<PAGE>   36

       3.17.  Year 2000 Computer Problem. The Seller has performed all of the
work regarding addressing the Year 2000 Computer Problem which the Seller has
advised ISO New England and NEPOOL has been performed, as more particularly
identified in Schedule 3.17.

       3.18.  Disclaimers Regarding Acquired Assets. EXCEPT FOR ANY
REPRESENTATIONS AND WARRANTIES SET FORTH IN THIS SECTION 3, THE ACQUIRED ASSETS
ARE SOLD "AS IS, WHERE IS," AND THE SELLER EXPRESSLY - DISCLAIMS ANY
REPRESENTATIONS OR WARRANTIES OF ANY KIND OR NATURE, EXPRESS OR IMPLIED, AS TO
LIABILITIES, OPERATIONS OF THE FACILITIES, TITLE, CONDITION, VALUE OR QUALITY
OF THE ACQUIRED ASSETS OR THE PROSPECTS (FINANCIAL AND OTHERWISE), RISKS AND
OTHER INCIDENTS OF THE ACQUIRED ASSETS INCLUDING, WITHOUT LIMITATION, WITH
RESPECT TO THE ACTUAL OR RATED GENERATING CAPABILITY OF ANY OF THE FACILITIES
OR THE ABILITY OF THE BUYER TO SELL FROM ANY OF THE FACILITIES ELECTRIC ENERGY,
CAPACITY OR OTHER PRODUCTS RECOGNIZED BY ISO NEW ENGLAND FROM TIME TO TIME, AND
THE SELLER SPECIFICALLY DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANT
ABILITY, USAGE, OR SUITABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE WITH
RESPECT TO THE ACQUIRED 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 AS-TO THE CONDITION OF THE
ACQUIRED ASSETS, OR ANY PART THEREOF, INCLUDING, WITHOUT LIMITATION, THE
CONDITION OF THE ACQUIRED ASSETS WITH RESPECT TO TILE YEAR 2000 COMPUTER
PROBLEM, OR WHETHER THE SELLER POSSESSES SUFFICIENT REAL PROPERTY OR PERSONAL
PROPERTY TO OPERATE TILE ACQUIRED ASSETS. EXCEPT AS OTHER WISE EXPRESSLY
PROVIDED HEREIN, THE SELLER FURTHER SPECIFICALLY DISCLAIMS ANY REPRESENTATION
OR WARRANTY REGARDING THE ABSENCE OF HAZARDOUS SUBSTANCES OR LIABILITY OR
POTENTIAL LIABILITY ARISING UNDER ENVIRONMENTAL LAWS. WITHOUT LIMITING THE
GENERALITY OF THE FOREGOING, EXCEPT AS EXPRESSLY PROVIDED HEREIN, THE SELLER
EXPRESSLY DISCLAIMS ANY REPRESENTATION OR WARRANTY OF ANY KIND REGARDING THE
CONDITION OF THE ACQUIRED ASSETS OR THE SUITABILITY

                                  35

<PAGE>   37

THEREOF AS SITES FOR THE DEVELOPMENT OF ADDITIONAL OR RE PLACEMENT GENERATION
CAPACITY, AND NO MATERIAL OR INFORMATION PROVIDED BY OR COMMUNICATIONS MADE BY
THE SELLER, OR BY ANY BROKER OR INVESTMENT BANKER, INCLUDING WITHOUT LIMITATION
ANY INFORMATION OR MATERIAL CONTAINED IN THE DESCRIPTIVE MEMORANDUM DATED AS OF
FEBRUARY 10, 1999 AND ANY ORAL, WRITTEN OR ELECTRONIC RESPONSE TO ANY
INFORMATION REQUEST PROVIDED TO THE BUYER, WILL CAUSE OR CREATE ANY WARRANTY,
EXPRESS OR IMPLIED, AS TO THE TITLE, CONDITION, VALUE OR QUALITY OF THE
ACQUIRED ASSETS.

4.     Representations and Warranties of the Buyer. The Buyer represents and
warrants to the Seller that the statements contained in this Section 4 are
correct and complete as of the Effective Date.

       4.1.   Organization of the Buyer. The Buyer is a corporation duly
organized, validly existing and in good standing under the laws of Delaware.
Copies of the organizational documents and bylaws of the Buyer, each as amended
to date, have been heretofore delivered to the Seller and are accurate and
complete.

       4.2.   Authorization of Transaction. The Buyer has the power and
authority (including full corporate power and authority) to execute and deliver
this Agreement and the Related Agreements and, subject to receipt of all
Buyer's Regulatory Approvals, to perform its obligations hereunder and
thereunder. All corporate actions or proceedings to be taken by or on the part
of the Buyer to authorize and permit the due execution and valid delivery by
the Buyer of this Agreement, the Related Agreements and the instruments
required to be duly executed and validly delivered by the Buyer pursuant hereto
and thereto, the performance by the Buyer of its obligations hereunder and
thereunder, and the consummation by the Buyer of the transactions contemplated
herein and therein, have been duly and properly taken. This Agreement and the
Related Agreements have been duly executed and validly delivered by the Buyer
and constitute the valid and legally binding obligations of the Buyer,
enforceable in accordance with their terms and conditions.

       4.3.   Noncontravention. Subject to the Buyer obtaining the Buyer's
Regulatory Approvals, -neither the execution and the delivery of this Agreement
or any of the Related Agreements, nor the consummation of the transactions
contemplated hereby and thereby (including the assignments and assumptions
referred to in Sections 2.10(t) and 2.11(1) above), will (i) violate any
constitution, statute, regula-

                                       36

<PAGE>   38

tion, rule, injunction, judgment, order, decree, ruling, charge, or other
restriction of any Governmental Authority to which the Buyer is subject or any
provision of the [organizational documents] or bylaws of the Buyer or (ii)
conflict with, result in a breach of, constitute a default under, result in the
acceleration of, create in any party the right to accelerate, terminate,
modify, or cancel, or require any notice under any agreement, contract, lease,
license, instrument, or other arrangement to which the Buyer is a party or by
which it is bound or to which any of its assets is subject, except for matters
that will not have a Buyer Material Adverse Effect.

       4.4.   Brokers' Fees. The Buyer has no Liability or obligation to pay
any fees or commissions to any broker, finder or agent with respect to the
transactions contemplated by this Agreement for which the Seller could become
liable or obligated.

       4.5.   Litigation. No action, suit, claim, demand or other proceeding is
pending or, to the Buyer's Knowledge, threatened that would be reasonably
likely to result in a Buyer Material Adverse Effect or that questions the
validity of this Agreement or the Related Agreements or of any action taken or
to be taken pursuant to or in connection with the provisions of this Agreement
or the Related Agreements. There are no judgments, orders, decrees, citations,
fines or penalties heretofore assessed against the Buyer that have a Buyer
Material Adverse Effect or impair, estop, impede, restrain, ban or otherwise
adversely affect the Buyer's ability to satisfy or perform any of the Assumed
Liabilities under any federal, state or local Law.

       4.6.   No Knowledge of the Seller 's Breach. The Buyer has no Knowledge
of any breach by the Seller of any representation or warranty contained in
Section 3 hereof, or of any condition or circumstance that would excuse the
Buyer from performance of its obligations under this Agreement or the Related
Agreements.

       4.7.   Availability of Funds. The Buyer has sufficient funds available
to it to pay the Closing Purchase Price on the Closing Date.

       4.8.   "As Is" Sale. The representations and warranties set forth in
Section 3 hereof constitute the sole and exclusive representations and
warranties of the Seller in connection with the transactions contemplated
hereby. There are no representations, warranties, covenants, understandings or
agreements among the Parties regarding the Acquired Assets or their transfer
other than those incorporated in this Agreement. Except for the representations
and warranties expressly set forth in Section 3, the Buyer disclaims reliance
on any representations, warranties or guaran-

                                       37

<PAGE>   39

tees, either express or implied, by the Seller including but not limited to any
representation or warranty expressed or implied in the Descriptive Memorandum
dated as of February 10, 1999 and any oral, written or electronic response to
any information request provided to the Buyer. EXCEPT AS OTHERWISE EXPRESSLY
PROVIDED HEREIN, THE BUYER ACKNOWLEDGES AND AGREES THAT THE ACQUIRED ASSETS ARE
BEING ACQUIRED "AS IS, WHERE IS" - ON THE CLOSING DATE, AND IN THEIR CONDITION
ON THE CLOSING DATE, AND THAT PRIOR TO TILE EXECUTION OF THIS AGREEMENT, THE
BUYER HAS CONDUCTED TO ITS SATISFACTION ALL NECESSARY AND SUFFICIENT
EXAMINATION OF THE ACQUIRED ASSETS, AND THAT THE BUYER IS RELYING ON ITS OWN
EXAMINATION OF THE ACQUIRED ASSETS, AND IS NOT RELYING ON ANY REPRESENTATION OR
WARRANTY MADE BY THE SELLER, OR ANY BROKER OR INVESTMENT BANKER. TILE BUYER
FURTHER ACKNOWLEDGES AND AGREES THAT, EXCEPT AS SET FORTH IN SECTION 9.1, THE
REPRESENTATIONS AND WARRANTIES OF THE SELLER SET FORTH IN THIS AGREEMENT
TERMINATE AS OF THE CLOSING DATE OR TERMINATION OF THIS AGREEMENT PURSUANT TO
SECTION 10.1, AND THAT FOLLOWING THE CLOSING DATE OR SUCH TERMINATION, AS THE
CASE MAY BE, THE BUYER SHALL HAVE NO RECOURSE AGAINST THE SELLER WITH RESPECT
TO ANY BREACH OF SUCH REPRESENTATIONS AND WARRANTIES.

       4.9.   Affiliate Guaranty. If the Buyer assigns its rights and interests
to an Affiliate or Affiliates pursuant to Section 11.5 hereof, the Buyer shall
be deemed to have made the representations and warranties in this Section 4 on
behalf of itself and any such Affiliate as if such Affiliate were a signatory
to this Agreement.

       4.10.  Qualified Buyer. To the Knowledge of the Buyer, the Buyer is
qualified to obtain any Permits necessary for the Buyer to own and operate the
Acquired Assets as of the Closing, to the extent such operation is either
required by any Related Agreement or this Agreement, or is contemplated by the
Buyer.

5.     Covenants. The Parties agree as follows:

       5.1.   General. Prior to the Closing, each of the Parties will use its
best efforts to take all actions and to do all things necessary, proper or
advisable in order to consummate and make effective the transactions
contemplated by this Agreement

                                       38

<PAGE>   40

and the Related Agreements prior to January 1, 2000 (including satisfaction,
but not waiver, of the closing conditions set forth in Section 6 below).

       5.2.   Notices, Consents and Approvals.

              (a)    The Seller and the Buyer shall each file or cause to be
       filed with the Federal Trade Commission and the United States Department
       of Justice any notifications required to be filed under the
       Hart-Scott-Rodino Act and the rules and regulations promulgated
       thereunder with respect to the transactions contemplated hereby. The
       Parties shall cooperate with each other and use Commercially Reasonable
       Efforts to make such filings, as promptly as possible after the
       Effective Date, to respond promptly to any requests for additional
       information made by either of such agencies, and to cause the waiting
       periods under the Hart-Scott-Rodino Act to terminate or expire at the
       earliest possible date after the date of filing. The Buyer will pay all
       filing fees under the Hart-Scott-Rodino Act, but each Party will bear
       its own costs for the preparation of any filing. Both Parties shall use
       Commercially Reasonable Efforts to cause any waiting period under the
       Hart-Scott- Rodino Act with respect to the transactions contemplated by
       this Agreement and the Related Agreements to expire or terminate at the
       earliest possible time.

              (b)    Prior to the Closing, the Seller and the Buyer shall
       cooperate with each other and use all Commercially Reasonable Efforts to
       (i) promptly prepare and file all necessary documentation, (ii) effect
       all necessary applications, notices, petitions and filings and execute
       all agreements and documents, (iii) obtain the transfer or reissuance to
       the Buyer of all necessary Permits and (iv) obtain all necessary
       consents, approvals and authorizations of all other parties necessary or
       advisable to consummate the transactions contemplated by this Agreement
       or in any of the Related Agreements (including, without limitation, the
       Seller's Regulatory Approvals and the Buyer's Regulatory Approvals) or
       required by the terms of any note, bond, mortgage, indenture, deed of
       trust, license, franchise, permit, concession, contract, lease or other
       instrument to which the Seller or the Buyer is a party or by which any
       of them is bound. The Seller and the Buyer shall have the right to
       review in advance all characterizations of the information relating to
       the transactions contemplated by this Agreement or in any of the Related
       Agreements which appear in any filing made in connection with the
       transactions contemplated hereby or thereby. Notwithstanding the
       foregoing, the Seller is not obligated

                                       39

<PAGE>   41

       to assign or transfer any interest in any Transferable Permits,
       including, without limitation, those obtained pursuant to the applicable
       requirements of Environmental Laws, if the consent or approval of the
       third Person for such assignment or transfer cannot be obtained.

              (c)    The Buyer shall have primary responsibility for securing
       the transfer or reissuance of the Permits (including the Transferable
       Permits) effective as of the Closing Date. The Seller shall cooperate
       with the Buyer's efforts in this regard and the Seller shall use all
       Commercially Reasonable Efforts to assist in the transfer or reissuance
       when so requested by the Buyer. If Buyer is unable to secure the
       transfer or reissuance of one or more Permits effective on the Closing
       Date, the Seller shall continue to cooperate with the Buyer's efforts to
       secure such transfer or reissuance following the Closing Date.

       5.3.   Operation of Business. During the Interim Period, the Seller will
operate and maintain the Acquired Assets in the ordinary course consistent with
Good Utility Practices, unless otherwise contemplated by this Agreement or with
the prior written consent of the Buyer. Without limiting the generality of the
foregoing, the Seller shall not, without the prior written consent of the
Buyer, which Buyer shall not unreasonably withhold or delay, during the Interim
Period, with respect to the Acquired Assets:

              (a)    sell, lease (as lessor), transfer or otherwise dispose of,
       any of the Acquired Assets, other than as used, consumed or replaced in
       the ordinary course of business consistent with Good Utility Practices,
       or encumber, pledge, mortgage or suffer to be imposed on any of the
       Acquired Assets any encumbrance other than Permitted Encumbrances of the
       type described in clauses (i) through (vi) of the definition thereof,
       and other than such additional financing under the Mortgage Indenture as
       shall not prevent the Seller from obtaining a Mortgage-Indenture Release
       substantially in the form attached hereto as Exhibit H;

              (b)    make any material change in the levels of Inventories
       customarily maintained by the Seller with respect to the Acquired
       Assets, except for such changes that are consistent with Good Utility
       Practices;

              (c)    amend, terminate or otherwise modify any Contract, Lease
       or Permit other than in the ordinary course of business, or as may be
       required in

                                       40

<PAGE>   42

       connection with transferring the Seller's rights or obligations
       thereunder to the Buyer pursuant to this Agreement;

              (d)    enter into, amend, or otherwise modify any real or
       personal property Tax agreement, treaty or settlement;

              (e)    except as set forth in Schedule 5.3(e), enter into any
       commitment for the purchase or sale of fuel (whether commodity or
       transportation) having a term greater than three (3) months and not
       terminable either (i) automatically on the Closing Date; or (ii) by
       option of the Buyer in its sole discretion at any time after the Closing
       Date without penalty;

              (f)    make any capital expenditures that are not Pre-Approved
       Capital Expenditures or enter into a Capital Commitment with respect
       thereto, except for those capital expenditures or Capital Commitments
       necessitated by Good Utility Practice, with respect to which the Seller
       shall advise the Buyer of the proposed incurrence thereof not less than
       thirty (30) days prior to the time the capital expenditures are to be
       made or a Capital Commitment with respect thereto undertaken (or such
       shorter period as may be necessitated by an emergency situation), and
       with respect to which the Buyer shall promptly deliver the written
       consent contemplated by this Section 5.3 unless the Buyer reasonably
       objects thereto;

              (g)    except as set forth in Schedule 5.4(g), make or cause to
       be made any material modifications to the Employee Benefit Plans;

              (h)    make any material changes to any Collective Bargaining
       Agreement or enter into any new Collective Bargaining Agreement; or

              (i)    hire (whether by transfer from within Seller's or its
       Affiliates' organizations or otherwise) any employees who would be
       Acquired Assets Employees other than to replace or fill vacancies for
       safety or operational purposes, without first consulting with Buyer.

Notwithstanding anything in Section 5.3 to the contrary, the Seller may, in its
sole discretion, (i) make Pre-Approved Capital Expenditures or incur a Capital
Commitment with respect thereto and (ii) make Capital Commitments for which an
adjustment to the Initial Purchase Price will be made pursuant to Section
2.6(b).

                                       41

<PAGE>   43

       5.4.   Full Access; Year 2000 Computer Problem

              (a)    During the Interim Period, the Seller will permit the
       Buyer and Representatives of the Buyer during normal business hours (i)
       to have access upon reasonable notice, in a manner so as not to
       interfere with the normal business operations of the Seller, to all
       premises, properties, management, personnel, books., records (including
       Tax records) and documents associated with the Acquired Assets; (ii)
       permit the Buyer to make such reasonable inspections thereof as the
       Buyer may reasonably request; and (iii) furnish the Buyer with a copy of
       each material report, schedule or other document filed or received by it
       with respect to the Acquired Assets with a Governmental Authority.
       Notwithstanding the foregoing, and without limiting the generality of
       the confidentiality provisions set forth in Section 7 hereof, the Seller
       shall: (i) not provide any information that the Seller or the Seller's
       counsel believes constitutes or could be deemed to constitute a waiver
       of the attorney-client privilege, and (ii) not be required to supply the
       Buyer with any information or records that the Seller is under a legal
       obligation not to supply, including, without limitation, any Acquired
       Assets Employees' Records.

              (b)    During the Interim Period, the Seller shall consult with
       the Buyer and cooperate with the Buyer's reasonable requests regarding
       modifications to any hardware, software or firmware (including embedded
       microcontrollers in non-computer equipment) included in the Acquired
       Assets so as to ensure to the extent practicable that on and following
       the Closing Date the operation of the Acquired Assets by the Buyer will
       not be interrupted or adversely affected due to the Year 2000 Computer
       Problem. Any amounts expended by the Seller at the request of the Buyer
       under this Section 5.4(b) shall constitute an adjustment to the Initial
       Purchase Price pursuant to Section 2.6(a) hereof.

              (c)    During the Interim Period, at the sole cost and expense of
       the Buyer, the Seller will permit designated employees or
       Representatives of the Buyer (the "Buyer's Observers") to observe all
       operations of the Seller related to the Acquired Assets and such
       observation shall be permitted on a cooperative basis in the presence of
       personnel of the Seller during normal business hours of the Seller;
       provided, however, that the Buyer's Observers shall not unreasonably
       interfere with the operation of the Acquired Assets by the Seller.

                                       42

<PAGE>   44

              (d)    During the Interim Period, the Seller will permit the
       environ mental consulting firm which prepared the Phase I and Phase II
       Reports referred to in Schedule 3.12 to conduct additional
       investigations of the Sites solely for the purpose of determining the
       projected cost of Remediation which may be required solely with respect
       to Releases specifically identified in such Phase I and Phase II
       Reports. Any such additional investigation shall be at the sole cost and
       expense of Buyer, shall be completed no later than sixty (60) days after
       the date of this Agreement, and shall be pursuant to a work plan
       reasonably acceptable to Buyer and Seller. The Buyer expressly
       acknowledges and agrees that any facts or other matters discovered as a
       result of the conduct of such additional investigations (including,
       without limitation, the projected cost of anticipated Remediation
       activities at the Sites) shall not be deemed to be or cause a Material
       Adverse Effect, shall not affect the Buyer's obligation to consummate
       the transactions contemplated hereby or the amount of the Purchase Price
       payable by it hereunder, and shall not impose any obligation on Seller
       to undertake any Remediation of any kind at or with respect to the
       Sites.

       5.5.   Interim Period Notice.

              (a)    The Buyer shall notify the Seller promptly if any
       information comes to its attention prior to the Closing that is likely
       (i) to excuse the Buyer from the performance of its obligations under
       this Agreement or the Related Agreements or (ii) cause any condition to
       close set forth in Sections 6.1 or 6.2 not to be satisfied.

              (b)    The Seller shall notify the Buyer of the existence of any
       matter which would cause any of the representations or warranties in
       Section 3 above to be untrue or incorrect. Unless the Buyer has the
       right to terminate this Agreement pursuant to Section 10. 1(b)(vi) below
       by reason of such notice and exercises that right within the period of
       15 days referred to in Section 10. 1(b)(vi) below, the written notice
       pursuant to this Section 5.5(b) shall be deemed to have amended the
       appropriate Schedule or Schedules as of the Effective Date, to have
       qualified the representations and warranties contained in Section 3
       above as of the Effective Date, and to have cured any misrepresentation
       or breach of warranty that otherwise might have existed hereunder by
       reason of the existence of such matter.

                                       43

<PAGE>   45

              (c)    The Buyer may elect at any time to notify the Seller of
       the existence of any matter, which if in existence on the Effective Date
       or the Closing Date would or might cause any of the representations or
       warranties in Section 4 above to be untrue or incorrect. Unless the
       Seller has the right to terminate this Agreement pursuant to Section
       10.1 (c)(vi) below by reason of such notice and exercises that right
       within the period of 15 days referred to in Section 10. 1(c)(vi) below,
       the written notice pursuant to this Section 5.5(b) shall be deemed to
       have amended the appropriate Schedule or Schedules as of the Effective
       Date, to have qualified the representations and warranties contained in
       Section 4 above as of the Effective Date, and to have cured any
       misrepresentation or breach of warranty that otherwise might have
       existed hereunder by reason of the existence of such matter.

       5.6.   Further Assurances.

              (a)    any time and from time to time after the Closing, at the
       request of a Party, the other Party will execute and deliver such
       instruments of sale, transfer, conveyance, assignment and confirmation
       and take such action as the Seller and the Buyer may both reasonably
       agree is necessary to transfer, convey and assign to the Buyer, and to
       confirm the Buyer's title to or interest in the Acquired Assets and
       Assumed Liabilities or to put the Buyer in actual possession and
       operating control of the Acquired Assets.

              (b)    In the event that any asset that is an Acquired Asset
       shall not have been conveyed to the Buyer at the Closing, the Seller
       shall, subject to Sections 5.6(c), (d) and (e), use its best efforts to
       convey such asset to the Buyer as promptly as is practicable after the
       Closing.

              (c)    To the extent that the Seller's rights under any Contract
       or Lease may not be assigned without the consent of another Person which
       consent has not been obtained by the Closing Date, this Agreement shall
       not constitute an agreement to assign the same if an attempted
       assignment would constitute a breach thereof or be unlawful, and the
       Seller, at its expense, shall use its Commercially Reasonable Efforts to
       obtain any such required consent(s) as promptly as possible. The Seller
       and the Buyer agree that if any consent to an assignment shall not be
       obtained, or if any attempted assignment would be ineffective or would
       impair the Buyer's rights and obligations under the Contract or Lease in
       question, so that the Buyer would not in effect acquire the benefit of
       all such rights and obligations, the Seller, to the maxi-

                                       44

<PAGE>   46

       mum extent permitted by law and such Contract or Lease, shall, after the
       Closing, appoint the Buyer to be the Seller's agent with respect to such
       Contract or Lease, and the Seller shall, to the maximum extent permitted
       by law and such Contract or Lease, enter into such reasonable
       arrangements with the Buyer as are necessary to provide the Buyer with
       the benefits and obligations of such Contract or Lease. The Seller and
       the Buyer shall cooperate and shall each use their Commercially
       Reasonable Efforts after the Closing to obtain an assignment of such
       Contract or Lease to the Buyer; provided that neither the Seller nor the
       Buyer shall have any obligation to offer or pay any consideration in
       order to obtain any such consents.

              (d)    To the extent that the Seller's rights under any warranty
       or guaranty described in Section 2.1 (b) may not be assigned without the
       consent of another Person, which consent has not been obtained by the
       Closing Date, this Agreement shall not constitute an agreement to assign
       the same, if an attempted assignment would constitute a breach thereof,
       or be unlawful. The Seller and the Buyer agree that if any consent to an
       assignment of any such warranty or guaranty would be ineffective or
       would impair the Buyer's rights and obligations under the warranty or
       guaranty in question, so that the Buyer would not in effect acquire the
       benefit of all such rights and obligations, the Seller shall use
       Commercially Reasonable Efforts, at the Buyer's sole cost and expense,
       to the extent permitted by law and such warranty or guaranty, to enforce
       such warranty or guaranty for the benefit of the Buyer so as to the
       maximum extent possible to provide the Buyer with the benefits and
       obligations of such warranty or guaranty. Notwithstanding the foregoing,
       the Seller shall not be obligated to bring or if suit against any Third
       Party, provided that if the Seller shall determine not to bring or file
       suit after being requested by the Buyer to do so, the Seller shall
       assign, to the extent permitted by law or any applicable agreement or
       contract, its rights in respect of the claims so that the Buyer may
       bring or file such suit.

              (e)    To the extent that any personal property lease cannot be
       assigned to the Buyer or is not subject to arrangements described in
       Section 5.6(c), upon the Buyer's request and at the Buyer's sole
       expense, the Seller will use Commercially Reasonable Efforts to acquire
       the assets relating to such lease and to include them in the Acquired
       Assets before the Closing Date.

       5.7.   Employee Matters.

                                       45

<PAGE>   47

              (a)    The Buyer shall offer employment, commencing as of mid
       night on the Closing Date, to all employees of the Seller who are
       represented by the Locals and who were employed in the operation of the
       Acquired Assets at any time during the three-month period prior to the
       Closing Date, at levels of wages and overall compensation not lower
       than. each such employee's level of wages and overall compensation as of
       the Effective Date; provided that the Buyer shall recognize all
       increases in wages made in the ordinary course of business and in
       accordance with the Collective Bargaining Agreement (as defined
       hereinbelow) between the Effective Date and the Closing Date. Those
       employees who accept such offer of employment are hereinafter referred
       to as the "Represented Employees". All such offers of employment shall
       be made in accordance with all applicable laws and regulations and the
       Collective Bargaining Agreement between the Seller and the Locals dated
       June 1, 1998, as amended by the Memorandum of Understand ing dated
       December 17, 1998 between the Locals and the Seller (the "MOU", and,
       together with the above-referenced Collective Bargaining Agreement,
       referred to herein as the "Collective Bargaining Agreement"). Effective
       as of the Closing Date, the Buyer shall agree to be bound by the terms
       of the Collective Bargaining Agreement and to thereafter comply with all
       applicable obligations thereunder, subject to changes negotiated with
       and acceptable to the Locals.

              (b)    The Buyer agrees to offer employment, commencing as of
       midnight on the Closing Date, for a period of at least twelve months
       (the "Minimum Employment Period") to all employees of the Seller who
       were employed in the operation of the Acquired Assets at any time during
       the three-month period prior to the Closing Date, other than Represented
       Employees, at levels of wages and overall compensation not lower than
       each such employee's level of wages and overall compensation as of the
       Effective Date; provided that the Buyer shall recognize all increases in
       wages made in the ordinary course of business between the Effective Date
       and the Closing Date; and provided, further, that nothing herein shall
       prevent the Buyer from terminating any Non-Represented Employee's
       employment for cause during the Minimum Employment Period. Those
       employees who accept such offer of employment are hereinafter referred
       to as the "Non-Represented Employees, and the Non-Represented Employees
       and the Represented Employees are hereafter referred to as the "Acquired
       Assets Employees". All such offers of employment shall be made in
       accordance with all applicable laws. Notwith-

                                       46

<PAGE>   48

       standing anything herein to the contrary, all Non-Represented Employees
       will be employed as at-will employees whose employment may be terminated
       at any time with or without cause or reason by either the employee or
       the Buyer. In addition, the Buyer shall provide to any Non-Represented
       Employee who is furloughed during the six months following the Minimum
       Employment Period out-placement assistance and tuition reimbursement
       consistent with that provided to the Represented Employees in the Locals
       420 and 457 MOU. For purposes of this Section 5.7, the term "furloughed"
       shall refer to the termination of employment with or without possibility
       of recall, made by the Buyer without cause.
              (c)    As soon as practical after the Effective Date, Buyer shall
       take all action necessary and appropriate to establish and maintain a
       tax qualified pension plan for the Acquired Assets Employees (the
       "Buyer's Plan").

              (i)    The Buyer shall provide a minimum level of pension
                     benefits calculated using the pension benefit formula
                     applicable to each Acquired Asset Employee under the NUSCO
                     Retirement Plan (the "Seller's Plan") as of the Effective
                     Date. The Buyer's minimum obligation with regard to this
                     pension benefit will be calculated as the difference
                     between (a) the Acquired Assets Employee's total pension
                     benefit as calculated as of the employee's retirement date
                     using (1) the pension benefit formula under the Seller's
                     Plan applicable to the employee as of the Effective Date,
                     (ii) such employee's final average earnings (as defined in
                     the Seller's Plan) as of the employee's retirement date,
                     taking into account compensation earned from the Seller
                     and the Buyer, (iii) such employee's total years of
                     service with the Seller and the Buyer as of the employee's
                     retirement date, and (iv) covered compensation as of the
                     employee's retirement date and (b) the pension benefit
                     payable to the employee by the Seller at retirement as
                     follows: the pension benefit payable to each Acquired
                     Assets Employee at age 65 by the Seller shall be
                     calculated by the Seller as of the Closing Date, based
                     upon (i) the pension benefit formula under the Seller's
                     Plan applicable to the employee as of the Closing Date,
                     (ii) years of credited service with the Seller as of the
                     Closing Date, (iii) final average earnings (as defined in
                     the Seller's Plan) as of the Closing Date, and (iv)
                     covered compensation as of the Closing Date. This benefit
                     shall be a vested terminated benefit subject

                                       47

<PAGE>   49

                     to the vested terminated actuarial factors applied under
                     the Seller's Plan.

              (ii)   The Seller shall provide each Acquired Assets Employee
                     with a vested and non-forfeitable right to a benefit equal
                     to his accrued benefit under the Seller's Plan determined
                     as of the Closing Date as described in Section 5.7(c)(i)
                     above.

              (iii)  (iii)  Employee (as defined below), the Buyer will provide
                     the benefits described in Schedule 5.7(c)(iii). An
                     Eligible Non-Represented Employee is an employee whose
                     age on the date of announcement of the successful
                     bidder(s) is between 50 and 54 years, inclusive, and whose
                     age plus years of credited service under the Seller's Plan
                     on the same date equals or exceeds 65 years.

              (iv)   Effective September 30, 1999, the Seller's Plan will
                     permit employees age 55 and older to retire on or after
                     January 1, 2000 with full pension benefits if the sum of
                     the employee's age and years of credited service equals 85
                     at such employee's termination date (the "Rule of 85").
                     The Buyer shall apply the Rule of 85 to all Acquired
                     Assets Employees.

              (d)    The Buyer shall establish and maintain for the
       Non-Represented Employees for a period of at least twelve months
       following the Closing Date plans and programs which, in the aggregate,
       shall be generally comparable to the plans and programs provided to such
       employees by Seller as of the Effective Date as listed on Schedule 3.15.

              (e)    The Buyer shall apply each Acquired Assets Employee's
       prior service with the Seller toward any eligibility, vesting or other
       waiting period requirements under the Buyer's Employee Benefit Plans
       (including the Buyer's Plan) to the extent such conditions were
       satisfied under the Seller's Employee Benefit Plans prior to the Closing
       Date. In addition, the Buyer shall waive all limitations with respect to
       preexisting conditions, exclusions and waiting periods with respect to
       participation and coverage requirements under the Buyer's Employee
       Benefit Plans and credit each Acquired Assets Employee for any
       co-payments and deductibles paid prior to the Closing Date under any
       such plans in which each Acquired Assets Employee participates.

                                       48

<PAGE>   50

       The Buyer shall vest each Acquired Assets Employee to the extent such
       employee is vested under the Seller's Employee Benefit Plans as of the
       Closing Date.

              (f)    Within a reasonable time prior to the Closing Date, the
       Seller shall provide the Buyer with such pertinent data or information
       as the Buyer shall reasonably require to determine each Acquired Assets
       Employee's service, compensation and accrued benefits under the Seller's
       Plan before the Closing Date.

              (g)    The authorized complement of employees (by position) for
       the Acquired Assets, as of the Effective Date, is set forth on Schedule
       5.7(g).

              (h)    The Seller shall provide and remain liable for any and all
       continuation of coverage under the Seller's Employee Benefit Plans as
       required under Section 601 through 608 of ERISA and Section 4980B of the
       Code with respect to any person as to whom a "qualifying event" as
       defined in Section 4980 of the Code occurred on or prior to the Closing
       Date.

              (i)    On or before the Closing Date, the Seller shall terminate
       the employment of the Acquired Assets Employees and shall be solely
       responsible for the payment of all wages and compensation thereupon
       legally owing to or with respect to the Acquired Assets Employees
       including, without limitation, accrued and payable vacation pay,
       bonuses, severance pay, overtime, and all benefits under any Employee
       Benefit Plan that became payable on account of such termination of
       employment or any other amounts to which the Acquired Assets Employees
       may be entitled for services rendered prior to their termination or by
       virtue of their termination. The Seller shall retain any and all
       liability under the Seller's Employee Benefit Plans for retirees of the
       Seller as of the Closing Date.

              (j)    The Seller agrees to timely perform and discharge all
       requirements under the WARN Act and under applicable state and local
       Laws for the notification of its employees arising from the sale of the
       Acquired Assets to the Buyer up to and including the Closing Date,
       including those employees who will become Acquired Assets Employees
       effective as of the Closing Date. After the Closing Date, the Buyer
       shall be responsible for performing and discharging all requirements
       under the WARN Act and under applicable state and local laws and
       regulations for the notification of its employees,

                                       49

<PAGE>   51

       whether Acquired Assets Employees or otherwise. All severance and other
       costs associated with workforce restructuring activities associated with
       the Assets and/or the Acquired Assets Employees subsequent to the
       Closing Date shall be borne solely by the Buyer.

       5.8.   Access after Closing.

              (a)    Records. For a period of five (5) years after the Closing
       Date, the Seller shall have reasonable access to all of the records,
       books and documents related to the Acquired Assets to the extent that
       such access may reasonably be required by the Seller in connection with
       matters relating to or affected by the operations of the Seller prior to
       the Closing Date. Such access shall be afforded by the Buyer upon
       receipt of reasonable advance notice and during normal business hours.
       The Seller shall be solely responsible for any costs or expenses
       incurred by it pursuant to this Section 5.8(a). If the Buyer shall
       desire to dispose of any records, books or documents that may relate to
       operation of the Acquired Assets before the Closing prior to the
       expiration of such five-year period, the Buyer shall, prior to such
       disposition, give to the Seller a reasonable opportunity, at the
       Seller's expense, to segregate and remove such records, books or
       documents as the Seller may select.

              (b)    Employees. For a period of five (5) years after the
       Closing Date, the Seller shall have reasonable access to the Acquired
       Assets Employees, for purposes of consultation or otherwise, to the
       extent that such access may reasonably be required by the Seller in
       connection with matters relating to or affected by the operations of the
       Seller prior to the Closing.

       5.9.   NEPOOL. At the Closing, the Buyer shall be a member in good
standing in NEPOOL. Except as required to preserve system reliability and in
compliance with the requirements of the ISO or NEPOOL, and as may be otherwise
provided in any Related Agreement, the Seller shall not interfere with the
Buyer's efforts to expand or modify generation capacity at any of the Sites.

       5.10.  Risk of Loss. Except as otherwise provided in this Section 5.10,
during the Interim Period all risk of loss or damage to the Acquired Assets
shall be borne by the Seller. If during the Interim Period the Acquired Assets
are damaged by fire or other casualty (each such event, an "Event of Loss"), or
are taken by a Governmental Authority by exercise of the power of eminent
domain (each, a "Taking"), then the following provisions shall apply:

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<PAGE>   52

              (a)    the occurrence of (i) any one or more Events of Loss, as a
       result of which the aggregate costs to restore, repair or replace, less
       any insurance proceeds received or payable to the Seller in connection
       with such Event or Events of Loss (provided that any insurance proceeds
       received or payable in connection with an Event or Events of Loss are
       either used to restore, repair or replace such Event or Events of Loss
       or made available to the Buyer), are reasonably estimated to be an
       amount less than or equal to $1,000,000, and/or (ii) any one or more
       Takings, as a result of which the aggregate condemnation proceeds equal
       an amount less than or equal to $1,000,000, shall have no effect on the
       transactions contemplated hereby;

              (b)    upon the occurrence of (i) any one or more Events of Loss,
       as a result of which the aggregate costs to restore, repair or replace,
       less any insurance proceeds received or payable to the Seller in
       connection with such Event or Events of Loss (provided that any
       insurance proceeds received or payable in connection with an Event or
       Events of Loss are either used to restore, repair or replace such Event
       or Events of Loss or made available to the Buyer'), are reasonably
       estimated to be an amount in excess of $1,000,000, or (ii) any one or
       more Takings, as a result of which the aggregate condemnation proceeds
       equal an amount in excess of$ 1,000,000 (a "Major Loss"), the Seller
       shall have, in the case of a Major Loss relating to one or more Events
       of Loss, the option, exercised by notice to the Buyer, to restore,
       repair or replace the damaged Acquired Assets prior to Closing. If the
       Seller elects to restore, repair or replace the Acquired Assets relating
       to a Major Loss, which election shall be made by notice to the Buyer
       within fifteen (15) days following the occurrence of the Major Loss, the
       completion of the repair, replacement or restoration will be a condition
       to the Closing and the Closing Date shall be postponed at the election
       of the Seller for the amount of time reasonably necessary to complete
       the restoration, repair or replacement, not to exceed one hundred and
       eighty (180) days without the Buyer's consent. If the Seller elects not
       to restore, repair or replace the Acquired Assets affected by a Major
       Loss, or such Major Loss is the result of one or more Takings, the
       provisions of Section 5. 10(c) will apply;

              (c)    in the event that the Seller elects not to restore, repair
       or replace a Major Loss, or in the event that the Seller, having elected
       to repair, replace or restore the Major Loss, fails to complete the
       repair, replacement or restoration within the one hundred eighty (180)
       days (or such longer period as

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<PAGE>   53

       the Buyer shall have consented to), or in the event that a Major Loss is
       the result of one or more Takings, then the Parties shall, within thirty
       (30) days following the Seller's election, failure to complete, or the
       occurrence of such Takings, as the case may be, negotiate in good faith
       an equitable adjustment in the Purchase Price to reflect the impact of
       the Major Loss, as mitigated by any repair, replacement or restoration
       work actually completed by the Seller, on the Acquired Assets being sold
       to the Buyer, and proceed to Closing. To assist the Buyer in its
       evaluation of any and all Events of Loss, the Seller shall provide the
       Buyer such access to the Acquired Assets and such information as the
       Buyer may reasonably request in connection therewith; and

              (d)    in the event that the parties fail to reach agreement on
       an equitable adjustment of the Purchase Price within the thirty (30)
       days provided in Section 5. 10(c), then the Buyer shall have the
       election, exercisable by notice to the Seller within fifteen (15) days
       immediately following the expiration of the thirty (30) day period, to
       either (a) proceed with the consummation of the transaction at Closing,
       with a reduction in the Purchase Price consistent with the Seller's last
       offer communicated to the Buyer, in which event the Seller shall assign
       over or deliver to the Buyer at Closing all condemnation proceeds or
       insurance proceeds which the Seller receives, or to which the Seller
       becomes entitled by virtue of the Events of Loss, less any costs and
       expenses reasonably incurred by the Seller in obtaining such
       condemnation proceeds or insurance proceeds, or (b) terminate this
       Agreement, in which event this Agreement shall terminate and neither
       Party shall thereafter have any obligation or liability to the other by
       reason of this Agreement. If the Buyer fails to make the election within
       the fifteen (15) day period, the Buyer will be deemed to have made the
       election to proceed with the Closing.

       5.11.  Regulatory Approval Process. The Parties acknowledge and agree
that it is essential that the Closing occur prior to December 31, 1999, and
that the Seller may suffer certain adverse consequences if the Closing does not
take place by that time. Accordingly, the Buyer hereby covenants that it shall
(x) submit its portion of the draft applications, including all required
exhibits and attachments, under Sections 203 and 205 of the Federal Power Act
substantially in a form ready for filing with the FERC (the "FERC
Applications") to the Seller on or before July 31, 1999 for the Seller's review
and (y) cooperate with the Seller with a view to filing the FERC Applications
with the FERC in accordance with the rules and regulations of the

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<PAGE>   54

FERC on or before September 1, 1999 and shall thereafter not seek to amend or
withdraw such FERC Applications.

       5.12.  Connecticut Transfer Act. The Buyer agrees that certain Sites on
which some or all of the Facilities are located are "establishments" within the
meaning of the Connecticut Transfer Act (CGS section 22a-134 et seq.), and that
it is the Buyer's sole and exclusive responsibility (i) to determine the
"establishment" status for each Site and Facility; (ii) to comply, at its sole
cost and expense, with any requirement for executing appropriate forms and
making necessary submissions in connection with the Connecticut Transfer Act;
(iii) to comply, at its sole cost and expense, with any requirement under the
Connecticut Transfer Act for investigations or Remediations of Hazardous
Substances Released at or emanating from the Sites; and (iv) to pay any
transfer fees due the Connecticut Department of Environmental Protection and
other related fees or costs; provided, however, that the Seller shall pay to
and indemnify the Buyer for any such costs or expenses (including the costs of
investigations or Remediations of Hazardous Substances Released at or emanating
from the Sites) to the extent they relate to (i) any Substation Area (as
defined in the Reserved Easements) or (ii) to the portion of the properties on
which the Granted Easements are located which are not part of the Generating
Easement Area, as defined in the Granted Easements.

       5.13.  Discharge of Environmental Liabilities. In discharging its
Environ mental Liabilities, if any, on or after the Closing Date, pursuant to
Section 2.3(a) hereof, the Buyer agrees and covenants that the Buyer will not
prejudice or impair the Seller's rights under the Environmental Laws or
interfere with the Seller's ability to contest in appropriate administrative,
judicial or other proceedings its liability, if any, for Environmental Claims
or Remediation. The Buyer further agrees to provide to the Seller draft copies
of all plans and studies prepared in connection with any Site investigation or
Remediation prior to their submission to the Governmental Authority with
jurisdiction under Environmental Laws. The Seller shall have the right, without
the obligation, to attend all meetings between the Buyer, its agents or
representatives, and such Governmental Authorities. The Buyer shall promptly
provide to the Seller copies of all written information, plans, documents and
material correspondence submitted to or received from such Governmental
Authorities relating to the Buyer'

6.     Conditions to Obligation to Close.

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<PAGE>   55

       6.1.   Conditions to Obligation of the Buyer to Close. The obligation of
the Buyer to consummate the transactions to be performed by it in connection
with the Closing is subject to satisfaction of the following conditions:

              (a)    Representations and Warranties. The representations and
       warranties set forth in Section 3 above shall be true and correct in all
       material respects at and as of the Closing Date;

              (b)    Performance by the Seller. The Seller shall have performed
       and complied in all material respects with all of its covenants,
       agreements and obligations hereunder through the Closing;

              (c)    Buyer's Regulatory Approvals. The Buyer shall have
       received the Buyer's Regulatory Approvals specified in Schedule 6.1.
       (c), with such terms and conditions as may be included therein except
       for such terms and conditions that, either singly or in the aggregate,
       are reasonably likely to have a Material Adverse Effect;

              (d)    Seller's Regulatory Approvals. The Seller shall have
       received the Seller's Regulatory Approvals specified in Schedule 6.2(c),
       with such terms and conditions as may be included therein except for
       such terms and conditions that, either singly or in the aggregate, are
       reasonably likely to have a Material Adverse Effect;

              (e)    Absence of Litigation. There shall not be any injunction,
       judgment, order, decree or ruling in effect or pending which would
       prevent or inhibit consummation of the transactions contemplated by this
       Agreement or the Related Agreements;

              (f)    Antitrust Matters. All applicable waiting periods (and any
       extensions thereof) under the Hart-Scott-Rodino Act shall have expired
       or otherwise been terminated;

              (g)    No Material Adverse Effect.  There shall not be any
       Material Adverse Effect; and

              (h)    Deliveries. The Seller shall have complied in all material
       respects with the delivery requirements of Section 2.10.

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<PAGE>   56

              (i)    Title Insurance. The issuer of the Title Commitment shall
       have made available to Buyer title insurance policies in an amount equal
       to the Purchase Price insuring title to the Acquired Assets as of the
       Closing Date substantially in the form of the Title Commitments, with
       such changes therefrom as shall not in the aggregate have a Material
       Adverse Effect and with the exceptions for parties in possession (other
       than those disclosed in Schedule 2. 1(a)(ii), if any) and unfiled
       mechanics' and materialmen's liens (other than those that arise from any
       act of Buyer or arise under Good Utility Practice and are not material
       to the operation or use of the Acquired Assets in the business of Seller
       as conducted on the Effective Date) removed; provided, that Buyer shall
       be under no obligation to pay any amounts to the issuer of such title
       insurance policies in order to cause an exception not contained in the
       Title Commitments to be removed from such title insurance policies if
       the amount of such payment would constitute a Material Adverse Effect.

The Buyer may waive any condition specified in this Section 6.1 if it executes
a writing so stating at or prior to the Closing and such waiver shall not be
considered a waiver of any other provision in this Agreement unless the writing
specifically so states.

       6.2.   Conditions to Obligation of the Seller to Close. The obligation
of the Seller to consummate the transactions to be performed by it in
connection with the Closing is subject to satisfaction of the following
conditions:

              (a)    Representations and Warranties. The representations and
       warranties set forth in Section 4 above shall be true and correct in all
       material respects at and as of the Closing Date;

              (b)    Performance by Buyer. The Buyer shall have performed and
       complied in all material respects with all of its covenants, agreements
       and obligations hereunder through the Closing;

              (c)    Seller's Regulatory Approvals. The Seller shall have
       received the Seller's Regulatory Approvals specified in Schedule 6.2.
       (c), in each case without terms and conditions that are reasonably
       likely to have a material adverse effect on the Seller and in the case
       of the DPUC Approval, with such terms and conditions as are acceptable
       to the Seller in its sole and absolute discretion;

                                       55

<PAGE>   57

              (d)    Buyer's Regulatory Approvals. The Buyer shall have
       received the Buyer's Regulatory Approvals specified in Schedule 6.1(c),
       in each case without terms and conditions that are reasonably likely to
       have a material adverse effect on the Seller;

              (e)    Absence of Litigation. There shall not be any injunction,
       judgment, order, decree or ruling in effect or pending which would
       prevent or inhibit consummation of the transactions contemplated by this
       Agreement or the Related Agreements;

              (f)    Antitrust Matters. All applicable waiting periods (and any
       extensions thereof) under the Hart-Scott-Rodino Act shall have expired
       or otherwise been terminated;

              (g)    Deliveries. The Buyer shall have complied in all material
       respects with the delivery requirements of Section 2.11; and

              (h)    NEPOOL. The Buyer shall be a member in good standing of
       NEPOOL. The Seller may waive any condition specified in this Section 6.2
       if it executes a writing so stating at or prior to the Closing and such
       waiver shall not be considered a waiver of any other provision in this
       Agreement unless the writing specifically so states.

7.    Confidentiality.

              (a)    Each Receiving Party and each Representative thereof will
       treat and hold as confidential all of the Proprietary Information, and
       refrain from using any of the Proprietary Information except in
       connection with this Agreement and the Related Agreements and
       transactions contemplated hereby and thereby. In the event that the
       Receiving Party or any Representative thereof is requested or required
       (including, without limitation, (i) pursuant to any rule or regulation
       of any stock exchange or other self-regulatory organization upon which
       any of the Receiving Party's securities are listed or (ii) by oral
       question or request for information or documents in any legal
       proceeding, including without limitation the Buyer's Regulatory Approval
       and the Seller's Regulatory Approval processes, interrogatory, subpoena,
       civil investigative demand, or similar process) to disclose any
       Proprietary Information, the Receiving Party will notify the Disclosing
       Party promptly of the request or requirement so that the Disclosing
       Party may seek an appropriate

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<PAGE>   58

       protective order or waive compliance with the provisions of this Section
       7. If, in the absence of a protective order or the receipt of a waiver
       hereunder, the Receiving Party or any Representative thereof is, on the
       advice of counsel, compelled to disclose any Proprietary Information
       pursuant to any such request or requirement, then the Receiving Party or
       such Representative may disclose the Proprietary Information so
       requested or required to be disclosed; provided, however, that the
       Receiving Party shall use its reasonable best efforts to obtain, at the
       request of the Disclosing Party, an order or other assurance that
       confidential treatment will be accorded to such portion of the
       Proprietary Information required to be disclosed as the Disclosing Party
       shall designate. If this Agreement is terminated pursuant to Section
       10.1 hereof, then each Receiving Party shall deliver promptly to the
       Disclosing Party or destroy, at the request and option of the Disclosing
       Party, all tangible embodiments (and all copies) of the Proprietary
       Information which are in his or its possession.

              (b)    The obligations of the Parties contained in this Section 7
       shall be in full force and effect for three years from the date hereof
       and will survive the termination of this Agreement, the discharge of all
       other obligations owed by the Parties to each other and any transfer of
       title to the Acquired Assets. Nothing in this Section 7 shall in any way
       alter the Buyer's obligations under the Confidentiality Agreement dated
       February 12, 1999 by and between the Buyer and J.P. Morgan Securities
       Inc.

              (c)    Upon the Disclosing Party's prior written approval (which
       will not be unreasonably withheld), the Receiving Party may provide
       Proprietary Information to the DPUC, the FERC, the SEC, the United
       States Department of Justice, the United States Federal Trade Commission
       or any other Govern mental Authority with jurisdiction, as necessary, to
       obtain any consents, waivers or approvals as may be required for the
       Receiving Party to undertake the transactions contemplated herein. The
       Receiving Party will seek confidential treatment for such Proprietary
       Information provided to any such Governmental Authority (if such
       confidential treatment is available from the appropriate Governmental
       Authority) and the Receiving Party will notify the Disclosing Party as
       far in advance as is practicable of its intention to release to any such
       Governmental Authority any such Proprietary Information.

8.     Taxes.

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<PAGE>   59

              (a)    All transfer and sales Taxes incurred in connection with
       this Agreement and the transactions contemplated hereby shall be borne
       by the Buyer, including, without limitation, Connecticut state sales
       tax, and the Buyer, at its own expense, will file, to the extent
       required by applicable Laws, all necessary Tax Returns and other
       documentation with respect to all such transfer or sales Taxes, and, if
       required by applicable Laws, the Seller will join in the execution of
       any such Tax Returns or other documentation. Prior to the Closing Date,
       the Buyer will provide to the Seller, to the extent possible, an
       appropriate certificate of no tax due from each applicable taxing
       authority.

              (b)    With respect to Taxes to be prorated in accordance with
       Section 2.8 of this Agreement only, the Buyer shall prepare and timely
       file all Tax Returns required to be filed after the Closing with respect
       to the Acquired Assets, if any, and shall duly and timely pay all such
       Taxes shown to be due on such Tax Returns. The Buyer's preparation of
       any such Tax Re turns shall be subject to the Seller's approval, which
       approval shall not be unreasonably withheld. No later than twenty-five
       (25) Business Days prior to the due date of any such Tax Return, the
       Buyer shall make such Tax Return available for the Seller's review and
       approval. The Seller shall respond no later than ten (10) Business Days
       prior to the due date for filing such Tax Return. With respect to such
       Tax Return, the Seller shall pay to the Buyer its appropriate share of
       the amount shown as due on the Tax Returns determined in accordance with
       Section 2.8 of this Agreement.

              (c)    Each of the Buyer and the Seller shall provide the other
       with such assistance as may reasonably be requested by the other Party
       in connection with the preparation of any Tax Return, any audit or other
       examination by any taxing authority, or any judicial or administrative
       proceedings relating to liability for Taxes, and each will retain and
       provide the requesting Party with any records or information which may
       be relevant to such Tax Return, audit or examination, proceedings or
       determination. Any information obtained pursuant to this Section 8 or
       pursuant to any other Section hereof providing for the sharing of
       information or review of any Tax Return or other schedule relating to
       Taxes shall be deemed to be and shall be Proprietary Information.

9.     Survival of Representations and Warranties; Effect of Closing and
Indemnification.

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<PAGE>   60

       9.1.   Survival of Representations and Warranties; Survival of Covenants
and Agreements. The representations and warranties of the Seller set forth in
Sections 3.1, 3.2, 3.3, 3.4 and 3.16, and the representations and warranties of
the Buyer set forth in Sections 4.1, 4.2, 4.3 and 4.4, shall survive the
Closing for a period of twelve months; all other representations and warranties
of the Parties contained in this Agreement shall terminate at the Closing and
all representations and warranties of the Parties contained in this Agreement
shall terminate upon a termination of this Agreement pursuant to Section 10.1.
The covenants of the Parties contained in this Agreement, other than those
which by their terms survive the Closing and/or termination of this Agreement,
shall terminate at the Closing or the termination of this Agreement pursuant to
Section 10.1.

       9.2.   Effect of Closing. Upon the Closing, any condition to the
obligations of either Party hereunder that has not been satisfied, or any
representation, warranty or covenant that has been breached or left unsatisfied
by either Party will be deemed waived by the Parties, and each Party will be
deemed to fully release and forever discharge the other Party on account of any
and all claims, demands or charges, known or unknown, with respect to the same.
Nothing in this Section 9.2 shall be deemed to affect any provision herein
which expressly survives the Closing or pertains to matters which will occur
after the Closing.

       9.3.   Indemnity by the Seller. The Seller shall indemnify, defend and
hold harmless the Buyer against and in respect of all Liabilities, obligations,
judgments, Liens, injunctions, charges, orders, decrees, rulings, damages,
assessments, Taxes, losses, fines, penalties, damages, expenses, fees, costs,
and amounts paid in settlement (including reasonable consultants', attorneys'
and expert witness fees and disbursements in connection with investigating,
defending or settling any action or threatened action), arising out of any
claim, complaint, demand, cause of action, audit, investigation, hearing,
action, suit or other proceeding asserted or initiated or otherwise existing in
respect of any matter (collectively, the "Losses"), that results from:

              (a)    any Liability of the Seller that becomes a Liability of
       the Buyer under any bulk transfer law of any jurisdiction;

              (b)    any Excluded Liability;

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<PAGE>   61

              (c)    any breach by the Seller of any representation or warranty
       which by its terms survives the Closing or the termination of this
       Agreement under Section 10.1 hereof, provided that the Losses associated
       therewith have a Buyer Material Adverse Effect; and

              (d)    any breach by the Seller of any of its covenants contained
       in Article V hereof

       9.4.   Indemnity by Buyer. The Buyer hereby agrees to indemnify, defend
and hold harmless the Seller and its Affiliates against and in respect of all
Losses that result from:

              (a)    any Third Party Claim against the Seller based on or
       relating to the Buyer's ownership, operation or use of the Acquired
       Assets on or after the Closing Date;

              (b)    the Assumed Liabilities;

              (c)    any breach by the Buyer of any of its covenants contained
       in Article V hereof or

              (d)    the failure of the Buyer to close the transactions
       contemplated hereby within the time provided in Section 2.9 hereof,
       other than because of a failure of the Seller to perform its obligations
       under this Agreement.

       9.5.   Exclusive Remedy. From and after the Closing, the remedies set
forth in this Section 9 shall constitute the sole and exclusive remedies for
any and all claims, damages, complaints, demands, causes of action,
investigations, hearings, actions, suits or other proceedings relating to this
Agreement and are in lieu of any and all other rights and remedies which the
Seller or the Buyer may have under this Agreement or otherwise for monetary
relief with respect to any breach or failure to perform or with respect to the
Assumed or Excluded Liabilities. Each Party waives any provision of law to the
extent that it would limit or restrict the agreements contained in this Section
9. Nothing herein shall prevent either Party from terminating this Agreement in
accordance with Section 10.

       9.6.   Matters Involving Third Parties.

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<PAGE>   62

              (a)    If any Third Party shall notify any Party (the
       "Indemnified Party") with respect to any matter (a "Third Party Claim")
       which may give rise to a claim for indemnification against any other
       Party (the "Indemnfying Party") under this Section 9, then the
       Indemnified Party shall promptly notify the Indemnifying Party thereof
       in writing; provided, however, that no delay on the part of the
       Indemnified Party in notifying the Indemnifying Party shall relieve the
       Indemnifying Party from any obligation hereunder unless (and then solely
       to the extent) the Indemnifying Party thereby is prejudiced.

              (b)    Any Indemnifying Party will have the right to defend the
       Indemnified Party against the Third Party Claim with counsel of its
       choice reasonably satisfactory to the Indemnified Party so long as (i)
       the Indemnify ing Party notifies the Indemnified Party in writing within
       fifteen days after the Indemnified Party has given notice of the Third
       Party Claim that the Indemnifying Party will indemnify the Indemnified
       Party from and against the entirety of any Losses the Indemnified Party
       may suffer resulting from, arising out of, relating to, in the nature
       of, or caused by the Third Party Claim, (ii) the Indemnifying Party
       provides the Indemnified Party with evidence acceptable to the
       Indemnified Party that the Indemnifying Party will have the financial
       resources to defend against the Third Party Claim and fulfill its
       indemnification obligations hereunder, (iii) the Third Party Claim
       involves only money damages and does not seek an injunction or other
       equitable relief, settlement of, or an adverse judgment with respect to,
       the Third Party Claim is not, in the good faith judgment of the
       Indemnified Party, likely to establish a precedential custom or practice
       adverse to the continuing business interests of the Indemnified Party,
       and (iv) the Indemnifying Party conducts the defense of the Third Party
       Claim actively and diligently.

              (c)    So long as the Indemnifying Party is conducting the
       defense of the Third Party Claim in accordance with Section 9.5(b)
       above, (i) the Indemnified Party may retain separate co-counsel at its
       sole cost and expense and participate in the defense of the Third Party
       Claim, (ii) the Indemnified Party will not consent to the entry of any
       judgment or enter into any settlement with respect to the Third Party
       Claim without the prior written consent of the Indemnifying Party (which
       consent shall not unreasonably be with held), and (iii) the Indemnifying
       Party will not consent to the entry of any judgment or enter into any
       settlement with respect to the Third Party Claim unless written
       agreement is obtained releasing the Indemnified Party from all liability
       thereunder.

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              (d)    In the event any of the conditions in Section 9.5(b) above
       is or becomes unsatisfied, however, (1) the Indemnified Party may defend
       against, and consent to the entry of any judgment or enter into any
       settlement with respect to, the Third Party Claim in any manner it may
       deem appropriate (and the Indemnified Party need not consult with, or
       obtain any consent from, any Indemnifying Party in connection
       therewith), (ii) the Indemnifying Party will reimburse the Indemnified
       Party promptly and periodically for the costs of defending against the
       Third Party Claim (including attorneys' fees and expenses,
       notwithstanding Section 9.3), and (iii) the Indemnifying Party will
       remain responsible for any Losses the Indemnified Party may suffer
       resulting from, arising out of, relating to, in the nature of, or caused
       by the Third Party Claim to the fullest extent provided in this Section
       9.

       9.7.   Net of Taxes and Insurance. Any calculation of a Loss under this
Section 9 shall, in each case, give full effect to (i) any and all income Tax
benefits to the Indemnified Party in respect of the Loss, and (ii) any and all
insurance proceeds received or payable to the Indemnified Party in respect of
the Loss.

       9.8.   No Recourse. To the extent the transfer, conveyance, assignment
and delivery of the Acquired Assets to the Buyer as provided in this Agreement
is accomplished by deeds, assignments, easements, leases, licenses, bills of
sale, or other instruments of transfer and conveyance, whether executed at the
Closing or thereafter, these instruments are made without representation or
warranty by, or recourse against, the Seller, except as expressly provided in
this Agreement or in any such instrument.

10.    Termination.

       10.1.  Termination of Agreement. The Parties may terminate this
Agreement as provided below:

              (a)    the Parties may terminate this Agreement by mutual written
       consent at any time prior to the Closing;

              (b)    the Buyer may terminate this Agreement by giving written
       notice to the Seller at any time prior to the Closing if any of the
       following has occurred: (i) the Seller has breached any representation,
       warranty or covenant contained in this Agreement in any material
       respect, the Buyer has notified

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<PAGE>   64

       the Seller of the breach, and the breach has continued without cure for
       a period of sixty (60) days after the notice of breach; (ii) the Closing
       shall not have occurred on or before June 30, 2000 by reason of the
       failure of any condition precedent under Section 6.1 hereof (unless the
       failure results primarily from the Buyer itself breaching any
       representation, warranty, or covenant contained in this Agreement);
       (iii) one or more courts of competent jurisdiction shall have issued an
       order, judgment or decree permanently restraining, enjoining or
       otherwise prohibiting the Closing, which order, judgment or decree shall
       not have been terminated, lifted, vacated or other wise rendered
       irrelevant within ninety (90) days of the issuance thereof, (iv) any
       statute, rule or regulation shall have been enacted by any Governmental
       Authority which, directly or indirectly, prohibits the consummation of
       the transactions contemplated hereby; (v) in accordance with Section
       5.10 hereof, or (vi) (W) the Seller has within the then previous fifteen
       (15) days given the Buyer any notice pursuant. to Section 5.5(a) above
       and the matter that is the subject of such notice, if in existence on
       the Effective Date or the Closing Date, would cause the representations
       and warranties of the Seller set forth in Section 3 hereof not to be
       true and correct, (X) such matter would have a Material Adverse Effect,
       (Y) the Buyer has notified the Seller of its intent to terminate
       pursuant to this Section 10.1 (b)(vi), and (Z) the matter that is the
       subject of such notice continues to exist for a period of sixty (60)
       consecutive days after such notice by the Buyer; and

              (c)    the Seller may terminate this Agreement by giving written
       notice to the Buyer at any time prior to the Closing if any of the
       following has occurred: (i) the Buyer has breached any representation,
       warranty, or covenant contained in this Agreement in any material
       respect, the Seller has notified the Buyer of the breach, and the breach
       has continued without cure for a period of sixty (60) days after the
       notice of breach; (ii) the Closing shall not have occurred on or before
       June 30, 2000 by reason of the failure of any condition precedent under
       Section 6.2 hereof (unless the failure results primarily from the Seller
       itself breaching any representation, warranty, or covenant contained in
       this Agreement); (iii) one or more courts of competent jurisdiction
       shall have issued an order, judgment or decree permanently restraining,
       enjoining or otherwise prohibiting the Closing, which order, judgment or
       decree shall not have been terminated, lifted, vacated or other wise
       rendered irrelevant within ninety (90) days of the issuance thereof;
       (iv) any statute, rule or regulation shall have been enacted by any
       Governmental Authority which, directly or indirectly, prohibits the
       consummation of the

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<PAGE>   65

       transactions contemplated hereby; (v) in accordance with Section 5.10
       hereof, or (vi) (W) the Buyer has within the then previous fifteen (15)
       days given the Seller any notice pursuant to Section 5.5(a) above and
       the matter that is the subject of such notice, if in existence on the
       Effective Date or the Closing Date, would cause the representations and
       warranties of the Buyer set forth in Section 4 hereof not to be true and
       correct, (X) such matter would have a Material Adverse Effect, (Y) the
       Seller has notified the Buyer of its intent to terminate pursuant to
       this Section 10.1(c)(vi), and (Z) the matter that is the subject of such
       notice continues to exist for a period of sixty (60) consecutive days
       after such notice by the Seller.

       10.2.  Effect of Termination. If either Party terminates this Agreement
pursuant to Section 10.1 above, all rights and obligations of the Parties
hereunder shall terminate without any Liability of either Party to the other
Party (except for any Liability of any Party then in breach and except as
otherwise expressly provided herein).

11.    Miscellaneous.

       11.1.  Press Releases and Public Announcements. No Party shall issue any
press release or -make any public announcement relating to the subject matter
of this Agreement prior to the Closing without the prior approval of the other
Party; provided, however, that any Party may make any public disclosure it
believes in good faith is required by applicable law or any listing or trading
agreement concern ing its publicly-traded securities (in which case the
disclosing Party will provide the other Party with the opportunity to review in
advance the disclosure).

       11.2.  No Third Party Beneficiaries. This Agreement shall not confer any
rights or remedies upon any Third Party.

       11.3.  No Joint Venture. Nothing in this Agreement creates or is
intended to create an association, trust, partnership, joint venture or other
entity or similar legal relationship between the Parties, or impose a trust,
partnership or fiduciary duty, obligation, or liability on or with respect to
either Party. Except as provided in Section 5.6 hereof, neither Party is or
shall act as or be the agent or representative of the other Party.

       11.4.  Entire Agreement. This Agreement (including the Exhibits and
Schedules hereto), together with the Related Agreements and any other documents

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referred to herein, constitute the entire agreement between the Parties and
supersede any prior understandings, agreements, or representations by or
between the Parties, written or oral, to the extent they relate in any way to
the subject matter hereof, provided however, that the Confidentiality Agreement
referred to in Section 7(b) hereof shall remain in full force and effect
without regard to any provision of this Agreement. All conflicts or
inconsistencies between the terms hereof and the terms of any of the Related
Agreements, if any, shall be resolved in favor of this Agreement.

       11.5.  Succession and Assignment. This Agreement shall be binding upon
and inure to the benefit of the Parties named herein and their respective
successors and permitted assigns. No Party may assign either this Agreement or
the Related Agreements or any of its rights, interests, or obligations
hereunder or thereunder without the prior written approval of the other Party;
provided, however, that the Seller's written approval shall not be unreasonably
withheld if the Buyer elects to assign any or all of its rights and interests
hereunder to one or more of its Affiliates, provided that the Buyer shall
deliver the following documents before such assignment: (i) a Guaranty
substantially in the form of Exhibit F that guarantees the full and timely
performance of all obligations of such Affiliate under this Agreement, all
Related Agreements and all other agreements and commitments contemplated hereby
or thereby or in connection with the Closing entered into for the benefit of
the Seller, as so assigned; (ii) a copy, certified by the Secretary of the
Buyer, of resolutions authorizing the execution and delivery of such Guaranty;
(iii) a certificate of the Secretary of the Buyer identifying by name and title
and bearing the signatures of the officers of the Buyer authorized to execute
and deliver the Guaranty; (iv) an opinion from Gray, Plant, Mooty, Mooty &
Bennett, P.A., counsel to the Buyer, dated as of the date of such assignment
and reasonably satisfactory in form to the Seller and its counsel,
substantially to the effect that the Guaranty is a valid and binding obligation
of the Buyer; (v) evidence that such Affiliate is a member of NEPOOL.

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

       11.7.  Headings.  The section headings contained in this Agreement are
inserted for convenience only and shall not affect in any way the meaning or
interpretation of this Agreement.

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<PAGE>   67

       11.8.  Notices. All notices, requests, demands, claims and other
communications hereunder will be in writing. Any notice, request, demand, claim
or other communication hereunder shall be deemed duly given (i) upon
confirmation of facsimile, (ii) one Business Day following the date sent when
sent by overnight delivery and (iii) five Business Days following the date
mailed when mailed by registered or certified mail return receipt requested and
postage prepaid at the following address:

If to the Seller:

The Connecticut Light and Power Company
107 Selden Street
Berlin, CT 06037
Attn: Vice President - Administration

Copy to:

Vice President, Secretary and General Counsel
Northeast Utilities
107 Selden Street
Berlin, CT 06037

If to the Buyer:

NRG Energy, Inc.
1221 Nicollet Mall, Suite 700
Minneapolis, MN 5 5403-2445
Fax:  612-373-5392
Attn: Vice President and General Counsel

Copy to:

Joseph T. Kinning, Esq.
Gray, Plant, Mooty, Mooty & Bennett, P.A.
3400 City Center
33 South Sixth Street
Minneapolis, MN 55402-3796

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<PAGE>   68

Either Party may send any notice, request, demand, claim, or other
communication hereunder to the intended recipient at the address set forth
above using any other means (including personal delivery, expedited courier,
messenger service, telecopy, telex, ordinary mail, or electronic mail), but no
such notice, request, demand, claim or other communication shall be deemed to
have been duly given unless and until it actually is received by the intended
recipient. Either Party may change the address to which notices, requests,
demands, claims and other communications hereunder are to be delivered by
giving the other Party notice in the manner herein set forth. -

       11.9.  Governing Law. This Agreement shall be governed by and construed
in accordance with the domestic laws of the State of Connecticut without giving
effect to any choice or conflict of law provision or rule (whether of the State
of Connecticut or any other jurisdiction) that would cause the application of
the laws of any jurisdiction other than the State of Connecticut.

       11.10. Change in Law. If and to the extent that, during the Interim
Period, any laws or regulations that govern any aspect of this Agreement shall
change, so as to make any aspect of this transaction unlawful, then the Parties
agree to make such modifications to this Agreement as may be reasonably
necessary for this Agreement to accommodate any such legal or regulatory
changes.

       11.11. Consent to Jurisdiction. Each of the Seller and the Buyer
consents to the nonexclusive jurisdiction of any local, state or federal court
located within the City of Hartford, Connecticut, for adjudication of any suit,
claim, action or other proceeding at law or in equity relating to this
Agreement, or to any transaction contemplated hereby. The Seller and the Buyer
each accept, generally and unconditionally, the nonexclusive jurisdiction of
the aforesaid courts and waive any objection as to venue, and any defense
offorum nonconveniens.

       11.12. Amendments and Waivers. No amendment of any provision of this
Agreement shall be valid unless the same shall be in writing and signed by the
Buyer and the Seller. No waiver by any Party of any default, misrepresentation,
or breach of warranty or covenant hereunder, whether intentional or not, shall
be deemed to extend to any prior or subsequent default, misrepresentation, or
breach of warranty or covenant hereunder or affect in any way any rights
arising by virtue of any prior or subsequent such occurrence.

       11.13. Severability.  Any term or provision of this Agreement that is
invalid or unenforceable in any situation in any jurisdiction shall not affect
the validity or

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<PAGE>   69

enforceability of the remaining terms and provisions hereof or the validity or
enforceability of the offending term or provision in any other situation or in
any other jurisdiction.

       11.14. Expenses. Each of the Buyer and the Seller will bear its own
costs and expenses incurred in connection with this Agreement and the
transactions contemplated hereby (including legal and accounting fees and
expenses, except as otherwise provided in Section 9 above), except that the
Buyer shall bear the entire cost of(i) all filings by both the Seller and the
Buyer under the Hart-Scott Rodino Act and (ii) the Joint Application for
authorization pursuant to Sections 203 and 205 of the Federal Power Act.

       11.15. Construction. Ambiguities or uncertainties in the wording of this
Agreement will not be construed for or against any Party, but will be construed
in the manner that most accurately -reflects the Parties' intent as of the
Effective Date. The Parties acknowledge that they have 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.

       11.16. Incorporation of Exhibits and Schedules. The Exhibits and
Schedules identified in this Agreement are incorporated herein by reference and
made a part hereof

       11.17. Specific Performance. Each of the Parties acknowledges and agrees
that the other Party would be damaged irreparably in the event any of the
provisions of this Agreement are not performed in accordance with their
specific terms or otherwise are breached. Accordingly, each of the Parties
agrees that the other Party shall be entitled to an injunction or injunctions
to prevent breaches of the provisions of this Agreement and to enforce
specifically this Agreement and the terms and provisions hereof in any action
instituted in any court of the United States or any state thereof having
jurisdiction over the Parties and the matter in addition to any other remedy to
which it may be entitled, at law or in equity.

       11.18. Dispute Resolution. Prior to instituting any litigation or
dispute resolution mechanism, the Parties will attempt in good faith to resolve
any dispute or claim promptly by referring any such matter to their respective
chief executive officers for resolution. Either Party may give the other Party
written notice of any dispute or claim. Within ten (10) days after delivery of
said notice, the executives

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will meet at a mutually acceptable time and place, and thereafter as often as
they reasonably deem necessary to exchange information and to attempt to
resolve the dispute or claim within thirty (30) days.

                           [SIGNATURE PAGE TO FOLLOW]

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<PAGE>   71

              IN WITNESS WHEREOF, the Parties hereto have executed this
Agreement on the date first above written.

                               NRG ENERGY, INC.

                               /s/ Craig A. Mataczynski
                               ----------------------------------------
                               By:  Craig A. Mataczynski
                               Title:  Senior Vice President

                               THE CONNECTICUT LIGHT AND POWER COMPANY

                               /s/ John B. Keane
                               ----------------------------------------
                               By: John B. Keane
                               Title:  Vice President - Administration

                                       70

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