NRG ENERGY INC
8-K, EX-1.1, 2000-09-08
ELECTRIC SERVICES
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                                NRG Energy, Inc.

                                  $350,000,000

                           8.25% SENIOR NOTES DUE 2010

                             Underwriting Agreement

                                                              New York, New York
                                                               September 6, 2000

Salomon Smith Barney Inc.
Banc of America Securities LLC
Merrill Lynch, Pierce, Fenner & Smith Incorporated
c/o Salomon Smith Barney Inc.
388 Greenwich Street
New York, New York  10013

Ladies and Gentlemen:

     NRG Energy, Inc., a Delaware Corporation (the "Company"), proposes to sell
to the several underwriters named in Schedule I hereto (the "Underwriters"), for
whom you (the "Representatives") are acting as representatives, $350,000,000
principal amount of its 8.25% Senior Notes due 2010 (the "Securities"), to be
issued under an indenture (the "Indenture") dated as of September 11, 2000,
between the Company and Wells Fargo Bank Minnesota, National Association, as
trustee (the "Trustee"). To the extent there are no additional Underwriters
listed on Schedule I other than you, the term Representatives as used herein
shall mean you, as Underwriters, and the terms Representatives and Underwriters
shall mean either the singular or plural as the context requires. Any reference
herein to the Registration Statement, the Basic Prospectus, any Preliminary
Final Prospectus or the Final Prospectus shall be deemed to refer to and include
the documents incorporated by reference therein pursuant to Item 12 of Form S-3
which were filed under the Exchange Act on or before the Effective Date of the
Registration Statement or the issue date of the Basic Prospectus, any
Preliminary Final Prospectus or the Final Prospectus, as the case may be; and
any reference herein to the terms "amend", "amendment" or "supplement" with
respect to the Registration Statement, the Basic Prospectus, any Preliminary
Final Prospectus or the Final Prospectus shall be deemed to refer to and include
the filing of any document under the Exchange Act after the Effective Date of
the Registration Statement or the issue date of the Basic Prospectus, any
Preliminary Final Prospectus or the Final Prospectus, as the case may be, deemed
to be incorporated therein by reference. Certain terms used herein are defined
in Section 17 hereof.

                  1.       Representations and Warranties.  The Company
represents and warrants to, and agrees with, each Underwriter as set forth
below in this Section 1.


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                  (a) The Company meets the requirements for use of Form S-3
         under the Act and has prepared and filed with the Commission a
         registration statement (Registration Statement No. 333-93055) on Form
         S-3, including a related basic prospectus, for registration under the
         Act of the offering and sale of the Securities. The Company may have
         filed one or more amendments thereto, including a Preliminary Final
         Prospectus, each of which has previously been furnished to you. The
         Company will next file with the Commission one of the following: (1)
         after the Effective Date of such registration statement, a final
         prospectus supplement relating to the Securities in accordance with
         Rules 430A and 424(b), (2) prior to the Effective Date of such
         registration statement, an amendment to such registration statement
         (including the form of final prospectus supplement) or (3) a final
         prospectus in accordance with Rules 415 and 424(b). In the case of
         clause (1), the Company has included in such registration statement, as
         amended at the Effective Date, all information (other than Rule 430A
         Information) required by the Act and the rules thereunder to be
         included in such registration statement and the Final Prospectus. As
         filed, such final prospectus supplement or such amendment and form of
         final prospectus supplement shall contain all Rule 430A Information,
         together with all other such required information, and, except to the
         extent the Representatives shall agree in writing to a modification,
         shall be in all substantive respects in the form furnished to you prior
         to the Execution Time or, to the extent not completed at the Execution
         Time, shall contain only such specific additional information and other
         changes (beyond that contained in the Basic Prospectus and any
         Preliminary Final Prospectus) as the Company has advised you, prior to
         the Execution Time, will be included or made therein. The Registration
         Statement, at the Execution Time, meets the requirements set forth in
         Rule 415(a)(1)(x).

                  (b) On the Effective Date, the Registration Statement did or
         will, and when the Final Prospectus is first filed (if required) in
         accordance with Rule 424(b) and on the Closing Date (as defined
         herein), the Final Prospectus (and any supplement thereto) will, comply
         in all material respects with the applicable requirements of the Act,
         the Exchange Act and the Trust Indenture Act and the respective rules
         thereunder; on the Effective Date and at the Execution Time, the
         Registration Statement did not or will not contain any untrue statement
         of a material fact or omit to state any material fact required to be
         stated therein or necessary in order to make the statements therein not
         misleading; on the Closing Date the Indenture will comply in all
         material respects with the applicable requirements of the Trust
         Indenture Act and the rules thereunder; and, on the Effective Date, the
         Final Prospectus, if not filed pursuant to Rule 424(b), will not, and
         on the date of any filing pursuant to Rule 424(b) and on the Closing
         Date, the Final Prospectus (together with any supplement thereto) will
         not, include any untrue statement of a material fact or omit to state a
         material fact necessary in order to make the statements therein, in the
         light of the circumstances under which they were made, not misleading;
         provided, however, that the Company makes no representations or
         warranties as to (i) that part of the Registration Statement which
         shall constitute the Statement of Eligibility and Qualification (Form
         T-1) under the Trust Indenture Act of the Trustee or (ii) the
         information contained in or omitted from the Registration Statement or
         the Final Prospectus (or any supplement thereto) in reliance upon and
         in conformity with information furnished in writing to the Company by
         or on behalf of any Underwriter through the


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         Representatives specifically for inclusion in the Registration
         Statement or the Final Prospectus (or any supplement thereto).

                  (c) None of the Company and its significant subsidiaries (as
         defined by Rule 1-02 of Regulation S-X), all of which are set forth in
         Schedule II (the "Subsidiaries"), is or, after giving effect to the
         offering and sale of the Securities and the application of the proceeds
         thereof as described in the Prospectus, will be required to be
         registered or regulated as an "investment company" as defined in the
         Investment Company Act of 1940, as amended.

                  (d) The Company has not paid or agreed to pay to any person
         any compensation for soliciting another to purchase any Securities
         (except as contemplated by this Agreement).

                  (e) Except as set forth in the Final Prospectus, the Company
         and its Subsidiaries possess and are in compliance with all approvals,
         certificates, authorizations, licenses and permits issued by the
         appropriate state, Federal or foreign regulatory agencies or bodies
         necessary to conduct the business now being operated by them, except
         where the failure to possess such approvals, certificates,
         authorizations, licenses and permits or be in compliance therewith is
         not reasonably likely to have a material adverse effect on the
         condition, financial or otherwise, earnings, business or prospects of
         the Company and its subsidiaries, taken as a whole (a "Material Adverse
         Effect"), and none of the Company or its Subsidiaries has received any
         notice of proceedings relating to the revocation or modification of any
         such approval, certificate, authorization, license or permit which,
         individually or in the aggregate, is likely to have a Material Adverse
         Effect.

                  (f) Except as set forth in the Final Prospectus, there is no
         action, suit or proceeding before or by any court or governmental
         agency or body, domestic or foreign, now pending or, to the knowledge
         of the Company and its Subsidiaries threatened against the Company or
         any of its subsidiaries which is likely to result in any Material
         Adverse Effect or materially and adversely affect the offering of the
         Securities in the manner contemplated by the Final Prospectus.

                  (g)      This Agreement has been duly authorized, executed
         and delivered by the Company.

                  (h) The Securities have been duly authorized and at the
         Closing Date will have been duly executed by the Company and, when
         authenticated, issued and delivered in the manner provided for in the
         Indenture and delivered against payment of the purchase price therefor
         as provided in this Agreement, will constitute valid and binding
         obligations of the Company, enforceable against the Company in
         accordance with their terms, except as the enforcement thereof may be
         limited by bankruptcy, insolvency (including, without limitation, all
         laws relating to fraudulent transfers), reorganization, moratorium or
         similar laws affecting enforcement of creditors' rights generally and
         except as enforcement thereof is subject to general principles of
         equity (regardless of whether enforcement is considered in a proceeding

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         in equity or at law), and will be in the form contemplated by, and
         entitled to the benefits of, the Indenture.

                  (i) Except as set forth in the Final Prospectus and except for
         (i) San Francisco Thermal, Limited Partnership, (ii) Pittsburgh
         Thermal, Limited Partnership, and (iii) RSD Power Partners, L.P. (each
         of which is subject to regulation by virtue of its steam sales), none
         of the Company or the Subsidiaries is subject to regulation as a "steam
         corporation", "electric utility", "electric utility company", "utility
         company" or "public utility company" (collec tively, "Regulated
         Utilities") or any similar term by any federal, state, local or foreign
         public utility commission or regulatory body or under any applicable
         federal, state, local or foreign law as a Regulated Utility other than
         as public utilities that have been granted market-based rates under the
         Federal Power Act or any state regulation applicable to "exempt
         wholesale generators," as defined in Section 32 of the Public Utility
         Holding Company Act of 1935, as amended ("PUHCA").

                  (j) None of the Company or the Subsidiaries is an "electric
         utility company", a "public utility company", a "holding company", a
         "subsidiary company" of any of the foregoing or an "affiliate" of any
         of the foregoing or an "affiliate" of a "subsidiary" of a "holding
         company" (except insofar as the Company is a subsidiary of a registered
         holding company), each as defined in PUHCA.

                  (k) The Company's percentage ownership interest in its
         facilities, operations or projects under construction as set forth in
         the Final Prospectus are true and accurate in all material respects as
         of the date presented and any changes in the Company's percentage
         ownership interest in its facilities, operations or projects under
         construction which have occurred between such date and the date of this
         Agreement are as set forth on Schedule III hereto.

         Any certificate signed by any officer of the Company and delivered to
the Representatives or counsel for the Underwriters in connection with the
offering of the Securities shall be deemed a representation and warranty by the
Company, as to matters covered thereby, to each Underwriter.

                  2. Purchase and Sale. Subject to the terms and conditions and
in reliance upon the representations and warranties herein set forth, the
Company agrees to sell to each Underwriter, and each Underwriter agrees,
severally and not jointly, to purchase from the Company, the Securities, in the
respective principal amounts set forth opposite such Underwriter's name in
Schedule I hereto, at a purchase price equal to 99.053% of the principal amount
thereof (the "Purchase Price").

                  3. Delivery and Payment.  Delivery of and payment for the
Securities shall be made at 10:00 AM, New York City time, on September 11, 2000,
or at such time on such later date not more than three Business Days after the
foregoing date as the Representatives shall designate, which date and time may
be postponed by agreement between the Representatives and the Company or as
provided in Section 9 hereof (such date and time of delivery and payment for the
Securities

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being herein called the "Closing Date"). Delivery of the Securities shall be
made to the Representa tives for the respective accounts of the several
Underwriters, against payment by the several Underwriters through the
Representatives, of the Purchase Price thereof to or upon the order of the
Company by wire transfer payable in same-day funds to an account specified by
the Company. Delivery of the Securities shall be made through the facilities of
The Depository Trust Company unless the Representatives shall otherwise
instruct.

                  4. Offering by Underwriters.  It is understood that the
several Underwriters propose to offer the Securities for sale to the public as
set forth in the Final Prospectus.

                  5. Agreements.  The Company agrees with the several
Underwriters that:

                  (a) The Company will use its best efforts to cause the
         Registration Statement, if not effective at the Execution Time, and any
         amendment thereof, to become effective. Prior to the termination of the
         offering of the Securities, the Company will not file any amendment of
         the Registration Statement or supplement (including the Final
         Prospectus or any Preliminary Final Prospectus) to the Basic Prospectus
         or any Rule 462(b) Registration Statement unless the Company has
         furnished you a copy for your review prior to filing and will not file
         any such proposed amendment or supplement to which you reasonably
         object. Subject to the foregoing sentence, if the Registration
         Statement has become or becomes effective pursuant to Rule 430A, or
         filing of the Final Prospectus is otherwise required under Rule 424(b),
         the Company will cause the Final Prospectus, properly completed, and
         any supplement thereto to be filed with the Commission pursuant to the
         applicable paragraph of Rule 424(b) within the time period prescribed
         and will provide evidence satisfactory to the Representatives of such
         timely filing. The Company will promptly advise the Representa tives
         (1) when the Registration Statement, if not effective at the Execution
         Time, shall have become effective, (2) when the Final Prospectus, and
         any supplement thereto, shall have been filed (if required) with the
         Commission pursuant to Rule 424(b) or when any Rule 462(b) Registration
         Statement shall have been filed with the Commission, (3) when, prior to
         termination of the offering of the Securities, any amendment to the
         Registration Statement shall have been filed or become effective, (4)
         of any request by the Commission or its staff for any amendment of the
         Registration Statement, or any Rule 462(b) Registration Statement, or
         for any supplement to the Final Prospectus or for any additional
         information, (5) of the issuance by the Commission of any stop order
         suspending the effectiveness of the Registration Statement or the
         institution or threatening of any proceeding for that purpose and (6)
         of the receipt by the Company of any notification with respect to the
         suspension of the qualification of the Securities for sale in any
         jurisdiction or the institution or threatening of any proceeding for
         such purpose. The Company will use its best efforts to prevent the
         issuance of any such stop order or the suspension of any such
         qualification and, if issued, to obtain as soon as possible the
         withdrawal thereof.

                  (b) If, at any time when a prospectus relating to the
         Securities is required to be delivered under the Act, any event occurs
         as a result of which the Final Prospectus as then

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         supplemented would include any untrue statement of a material fact or
         omit to state any material fact necessary to make the statements
         therein in the light of the circumstances under which they were made
         not misleading, or if it shall be necessary to amend the Registration
         Statement or supplement the Final Prospectus to comply with the Act or
         the Exchange Act or the respective rules thereunder, the Company
         promptly will (1) notify the Representatives of such event, (2) prepare
         and file with the Commission, subject to the second sentence of
         paragraph (a) of this Section 5, an amendment or supplement which will
         correct such statement or omission or effect such compliance and (3)
         supply any supplemented Final Prospectus to you in such quantities as
         you may reasonably request.

                  (c) As soon as practicable, the Company will make generally
         available to its security holders and to the Representatives an
         earnings statement or statements of the Company and its subsidiaries
         which will satisfy the provisions of Section 11(a) of the Act and Rule
         158 under the Act.

                  (d) The Company will furnish to the Representatives and
         counsel for the Underwriters, without charge, signed copies of the
         Registration Statement (including exhibits thereto) and to each other
         Underwriter a copy of the Registration Statement (without exhibits
         thereto) and, so long as delivery of a prospectus by an Underwriter or
         dealer may be required by the Act, as many copies of each Preliminary
         Final Prospectus and the Final Prospectus and any supplement thereto as
         the Representatives may reasonably request. The Company will pay the
         expenses of printing or other production of all documents relating to
         the offering.

                  (e) The Company will arrange, if necessary, for the
         qualification of the Securities for sale under the laws of such
         jurisdictions as the Representatives may designate, will maintain such
         qualifications in effect so long as required for the distribution of
         the Securities and will pay any fee of the National Association of
         Securities Dealers, Inc., in connection with its review of the
         offering; provided that in no event shall the Company be obligated to
         qualify to do business in any jurisdiction where it is not now so
         qualified or to take any action that would subject it to service of
         process in suits, other than those arising out of the offering or sale
         of the Securities, in any jurisdiction where it is not now so subject.

                  (f) The Company will not, without the prior written consent of
         Salomon Smith Barney Inc., offer, sell, contract to sell, pledge, or
         otherwise dispose of, (or enter into any transaction which is designed
         to, or might reasonably be expected to, result in the disposition
         (whether by actual disposition or effective economic disposition due to
         cash settlement or otherwise) by the Company or any affiliate of the
         Company or any person in privity with the Company or any affiliate of
         the Company) directly or indirectly, including the filing (or
         participation in the filing) of a registration statement with the
         Commission in respect of, or establish or increase a put equivalent
         position or liquidate or decrease a call equivalent position within the
         meaning of Section 16 of the Exchange Act, any debt securities issued
         or guaranteed by the Company (other than the Securities) or publicly
         announce an intention to effect any such transaction, within 30 days
         after the Closing Date.

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                  (g) The Company will not take, directly or indirectly, any
         action designed to or that would constitute or that might reasonably be
         expected to cause or result, under the Exchange Act or otherwise, in
         stabilization or manipulation of the price of any security of the
         Company to facilitate the sale or resale of the Securities.

                  6. Conditions to the Obligations of the Underwriters. The
obligations of the Underwriters to purchase the Securities shall be subject to
the accuracy of the representations and warranties on the part of the Company
contained herein as of the Execution Time and the Closing Date, to the accuracy
of the statements of the Company made in any certificates pursuant to the
provisions hereof, to the performance by the Company of its obligations
hereunder and to the following additional conditions:

                  (a) If the Registration Statement has not become effective
         prior to the Execution Time, unless the Representatives agree in
         writing to a later time, the Registration Statement will become
         effective not later than (i) 6:00 PM New York City time, on the date of
         determination of the public offering price, if such determination
         occurred at or prior to 3:00 PM New York City time on such date or (ii)
         9:30 AM on the Business Day following the day on which the public
         offering price was determined, if such determination occurred after
         3:00 PM New York City time on such date; if filing of the Final
         Prospectus, or any supplement thereto, is required pursuant to Rule
         424(b), the Final Prospectus, and any such supplement, will be filed in
         the manner and within the time period required by Rule 424(b); and no
         stop order suspending the effectiveness of the Registration Statement
         shall have been issued and no proceedings for that purpose shall have
         been instituted or threatened.

                  (b) The Company shall have requested and caused Gibson, Dunn &
         Crutcher LLP, counsel for the Company, to have furnished to the
         Representatives their opinion, dated the Closing Date and addressed to
         the Representatives, to the effect that:

                           (i)  the Securities conform to the description
                  thereof contained in the Final Prospectus in all material
                  respects;

                           (ii) the Indenture has been duly authorized, executed
                  and delivered by the Company, has been duly qualified under
                  the Trust Indenture Act, and (assuming due authorization,
                  execution and delivery thereof by the Trustee) constitutes a
                  legal, valid and binding instrument enforceable against the
                  Company in accordance with its terms (subject, as to
                  enforcement of remedies, to applicable bankruptcy,
                  reorganization, insolvency, moratorium or other laws affecting
                  creditors' rights generally from time to time in effect and to
                  general principles of equity, including, without limitation,
                  concepts of materiality, reasonableness, good faith and fair
                  dealing, regardless of whether considered in a proceeding in
                  equity or at law); and the Securities have been duly
                  authorized by the Company and, when executed and authenticated
                  in accordance with the provisions of the Indenture and
                  delivered to and paid for by the Underwriters


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                  pursuant to this Agreement, will constitute legal, valid and
                  binding obligations of the Company entitled to the benefits of
                  the Indenture (subject, as to enforcement of remedies, to
                  applicable bankruptcy, reorganization, insolvency, moratorium
                  or other laws affecting creditors' rights generally from time
                  to time in effect and to general principles of equity,
                  including, without limitation, concepts of materiality,
                  reasonableness, good faith and fair dealing, regardless of
                  whether considered in a proceeding in equity or at law);

                           (iii) the Registration Statement has become effective
                  under the Act; any required filing of the Basic Prospectus,
                  any Preliminary Final Prospectus and the Final Prospectus, and
                  any supplements thereto, pursuant to Rule 424(b) have been
                  made in the manner and within the time period required by Rule
                  424(b); to the knowledge of such counsel, no stop order
                  suspending the effectiveness of the Registration Statement has
                  been issued, no proceedings for that purpose have been
                  instituted or threatened, and the Registration Statement and
                  the Final Prospectus (other than the financial statements and
                  other financial information contained therein, as to which
                  such counsel need express no opinion) comply as to form in all
                  material respects with the applicable requirements of the Act,
                  the Exchange Act and the Trust Indenture Act and the
                  respective rules thereunder;

                           (iv) this Agreement has been duly authorized,
                  executed and delivered by the Company;

                           (v)  the Company is not and, after giving effect to
                  the offering and sale of the Securities and the application of
                  the proceeds thereof as described in the Final Prospectus,
                  will not be an "investment company" required to be registered
                  under the Investment Company Act of 1940, as amended;

         Furthermore, following the opinion paragraphs, such counsel shall state
the following:

         "We have participated in conferences with officers and other
         representatives of the Company, representatives of the independent
         auditors of the Company and your representatives and counsel at which
         the contents of the Registration Statement, Preliminary Final
         Prospectus and/or Final Prospectus and related matters were discussed.
         Because the purpose of our professional engagement was not to establish
         or confirm factual matters and because the scope of our examination of
         the affairs of the Company did not permit us to verify the accuracy,
         completeness or fairness of the statements set forth in the
         Registration Statement, Preliminary Final Prospectus and/or Final
         Prospectus, we are not passing upon and do not assume any
         responsibility for the accuracy, completeness or fairness of the
         statements contained in the Registration Statement, Preliminary Final
         Prospectus and/or Final Prospectus, except to the extent set forth
         below in the last sentence of the immediately following paragraph.

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         On the basis of the foregoing, and except for the financial statements
         and schedules and other financial and statistical data included
         therein, as to which we express no opinion or belief, no facts have
         come to our attention that lead us to believe that the Registration
         Statement, on the Effective Date or on the date the Registration
         Statement was last deemed amended, contained any untrue statement of a
         material fact or omitted to state a material fact required to be stated
         therein or necessary to make the statements therein not misleading, or
         that the Preliminary Final Prospectus and/or Final Prospectus, as of
         their respective dates and as of the date hereof, contained or contains
         any untrue statement of a material fact or omitted or omits to state a
         material fact necessary to make the statements therein, in the light of
         the circumstances under which they were made, not misleading.
         Furthermore, on the basis of the foregoing, and insofar as the
         statements in the Registration Statement, Preliminary Final Prospectus
         and/or Final Prospectus under the caption 'Description of Notes' and
         'Description of Debt Securities' purport to describe specific
         provisions of the Indenture, such statements present in all material
         respects an accurate summary of such provisions."

         In rendering such opinion, such counsel may rely (A) as to matters
         involving the application of laws of any jurisdiction other than the
         State of New York, the State of Delaware or the Federal laws of the
         United States, to the extent they deem proper and specified in such
         opinion, upon the opinion of other counsel of good standing whom they
         believe to be reliable and who are satisfactory to counsel for the
         Underwriters and (B) as to matters of fact, to the extent they deem
         proper, on certificates of responsible officers of the Company and
         public officials. References to the Final Prospectus in this paragraph
         (b) include any supplements thereto at the Closing Date.

                  (c)      The Company shall have furnished to the
         Representatives the opinion of James J. Bender, Esq., general counsel
         of the Company, dated the Closing Date, to the effect
         that:

                           (i) each of the Company and the Subsidiaries has been
                  duly incorporated and is validly existing as a corporation in
                  good standing under the laws of the jurisdiction in which it
                  is chartered or organized, with full corporate power and
                  authority to own or lease, as the case may be, and to operate
                  its properties and conduct its business as described in the
                  Final Prospectus, and is duly qualified to do business as a
                  foreign corporation and is in good standing under the laws of
                  each jurisdiction which requires such qualification, except
                  where the failure to be so qualified or in good standing is
                  not reasonably likely to have a Material Adverse Effect;

                           (ii)     all the outstanding shares of capital stock
                  of the Company and of each Subsidiary have been duly and
                  validly authorized and issued and are fully paid and
                  nonassessable, and, except as otherwise set forth in the Final
                  Prospectus, all outstanding shares of capital stock of each of
                  the Subsidiaries are owned of record by the Company either
                  directly or through wholly owned Subsidiaries free and clear
                  of any perfected security interest and, to the knowledge of
                  such counsel, after due

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<PAGE>   10


                  inquiry, any other security interest, claim, lien or
                  encumbrance, other than such liens or other security interests
                  granted or created in connection with indebtedness of the
                  projects owned by such Subsidiaries;

                           (iii)    the Company's authorized equity
                  capitalization is as set forth in the Final Prospectus;

                           (iv) there is no pending, or, to the knowledge of
                  such counsel, threatened action, suit or proceeding by or
                  before any court or governmental agency, authority or body or
                  any arbitrator involving the Company or any of its
                  subsidiaries or its or their property, of a character required
                  to be disclosed in the Registration Statement which is not
                  adequately disclosed in the Final Prospectus, and there is no
                  franchise, contract or other document of a character required
                  to be described in the Registration Statement or Final
                  Prospectus, or to be filed as an exhibit thereto, which is not
                  described or filed as required; and the statements included or
                  incorporated by reference in the Final Prospectus under the
                  heading "Risk Factors -- Our business is subject to
                  substantial governmental regulation and permitting
                  requirements and may be adversely affected by any future
                  inability to comply with existing or further regulations or
                  requirements," fairly summarize the matters therein described;

                           (v) no consent, approval, authorization, filing with
                  or order of any court or governmental agency or body is
                  required in connection with the transactions contemplated
                  herein, except such as have been obtained under the Act and
                  such as may be required under the blue sky laws of any
                  jurisdiction in connection with the purchase and distribution
                  of the Securities by the Underwriters (about which such
                  counsel need express no opinion) in the manner contemplated in
                  this Agreement and in the Final Prospectus and such other
                  approvals (specified in such opinion) as have been obtained;

                           (vi) neither the execution and delivery of the
                  Indenture, the issue and sale of the Securities, nor the
                  consummation of any other of the transactions herein
                  contemplated nor the fulfillment of the terms hereof will
                  conflict with, result in a breach or violation or constitute a
                  default under (i) the charter or by-laws of the Company or its
                  Subsidiaries, (ii) the terms of any indenture, contract,
                  lease, mortgage, deed of trust, note agreement, loan agreement
                  or other agreement, obligation, condition, covenant or
                  instrument to which the Company or its Subsidiaries is a party
                  or bound or to which its or their property is subject, or
                  (iii) any statute, law, rule, regulation, judgment, order or
                  decree applicable to the Company or its Subsidiaries of any
                  court, regulatory body, administrative agency, governmental
                  body, arbitrator or other authority having jurisdiction over
                  the Company or its Subsidiaries or any of its or their
                  properties, except in the cases of clauses (ii) and (iii)
                  above, such conflict, breach, violation or default which is
                  not reasonably likely to have a Material Adverse Effect;


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<PAGE>   11

                           (vii) except as set forth in the Final Prospectus and
                  except for (i) San Francisco Thermal, Limited Partnership,
                  (ii) Pittsburgh Thermal, Limited Partner ship, and (iii) RSD
                  Power Partners, L.P., (each of which is subject to regulation
                  by virtue of its steam sales) none of the Company or its
                  Subsidiaries is subject to regulation as a Regulated Utility
                  or any similar term by any federal law, law of the State of
                  Minnesota or Minnesota public utility commission or federal
                  regulatory body or under any such law as a Regulated Utility
                  other than as public utilities that have been granted
                  market-based rates under the Federal Power Act or any state
                  regulation applicable to "exempt wholesale generators," as
                  defined in Section 32 of PUHCA;

                           (viii) none of the Company or its Subsidiaries is an
                  "electric utility company", a "public utility company", a
                  "holding company", a "subsidiary company" of any of the
                  foregoing, an "affiliate" of any of the foregoing, or an
                  "affiliate" of a "subsidiary" of a "holding company" (except
                  insofar as the Company is a subsidiary of an exempt holding
                  company), each as defined in PUHCA, which is subject to
                  regulation as such an entity under PUHCA, except pursuant to
                  Section 9(a)(2), Section 32 or Section 33 thereof;

                           (ix) except as set forth in the Final Prospectus, the
                  Company and its Subsidiaries possess and are in compliance
                  with all approvals, certificates, authorizations, licenses and
                  permits issued by the appropriate state, Federal or foreign
                  regulatory agencies or bodies necessary to conduct their
                  business as described in the Final Prospectus, except where
                  the failure to possess such approvals, certificates,
                  authorizations, licenses and permits or be in compliance
                  therewith would not be reasonably likely to have a Material
                  Adverse Effect and to the knowledge of such counsel, none of
                  the Company or its Subsidiaries has received any notice of
                  proceedings relating to the revocation or modification of any
                  such approval, certificate, authorization, license or permit
                  which, individually or in the aggregate, if it became the
                  subject of an unfavorable decision, ruling or finding, would
                  be reasonably likely to have a Material Adverse Effect; and

                           (x)      no holders of securities of the Company have
                  rights to the registration of such securities under the
                  Registration Statement.

         (d) The Representatives shall have received from Skadden, Arps, Slate,
         Meagher and Flom LLP, counsel for the Underwriters, such opinion or
         opinions, dated the Closing Date and addressed to the Representatives,
         with respect to the issuance and sale of the Securities, the Indenture,
         the Registration Statement, the Final Prospectus (together with any
         supplement thereto) and other related matters as the Representatives
         may reasonably require, and the Company shall have furnished to such
         counsel such documents as they request for the purpose of enabling them
         to pass upon such matters.

                                       11

<PAGE>   12



                  (e) The Company shall have furnished to the Representatives a
         certificate of the Company, signed by the Chairman of the Board or the
         President and the principal financial or accounting officer of the
         Company, dated the Closing Date, to the effect that the signers of such
         certificate have carefully examined the Registration Statement, the
         Final Prospectus, any supplements to the Final Prospectus and this
         Agreement and that:

                           (i) the representations and warranties of the Company
                  in this Agreement are true and correct in all material
                  respects on and as of the Closing Date with the same effect as
                  if made on the Closing Date and the Company has complied with
                  all the agreements and satisfied all the conditions on its
                  part to be performed or satisfied at or prior to the Closing
                  Date;

                           (ii) no stop order suspending the effectiveness of
                  the Registration Statement has been issued and no proceedings
                  for that purpose have been instituted or, to the Company's
                  knowledge, threatened; and

                           (iii) since the date of the most recent financial
                  statements included or incorporated by reference in the Final
                  Prospectus (exclusive of any supplement thereto), there has
                  been no material adverse effect on the condition (financial or
                  otherwise), earnings, business or properties of the Company
                  and its subsidiaries, taken as a whole, whether or not arising
                  from transactions in the ordinary course of business, except
                  as set forth in or contemplated in the Final Prospectus
                  (exclusive of any supplement thereto).

                  (f) The Company shall have requested and caused
         PricewaterhouseCoopers LLP to have furnished to the Representatives, at
         the Execution Time and at the Closing Date, letters, (which may refer
         to letters previously delivered to one or more of the Representa
         tives), dated respectively as of the Execution Time and as of the
         Closing Date, in form and substance satisfactory to the
         Representatives, confirming that they are independent accountants
         within the meaning of the Act and the Exchange Act and the respective
         applicable rules and regulations adopted by the Commission thereunder
         and that they have performed a review of the unaudited interim
         financial information of the Company for the six-month period ended
         June 30, 2000, and as at June 30, 2000, in accordance with Statement on
         Auditing Standards No. 71, and stating in effect that:

                           (i) in their opinion the audited financial statements
                  and financial statement schedules included or incorporated by
                  reference in the Registration Statement and the Final
                  Prospectus and reported on by them comply as to form in all
                  material respects with the applicable accounting requirements
                  of the Act and the Exchange Act and the related rules and
                  regulations adopted by the Commission;

                           (ii) on the basis of a reading of the latest
                  unaudited financial statements made available by the Company
                  and its subsidiaries; their limited review, in

                                       12

<PAGE>   13

                  accordance with standards established under Statement on
                  Auditing Standards No. 71, of the unaudited interim financial
                  information for the six-month period ended June 30, 2000 and
                  as at June 30, 2000, incorporated by reference in the
                  Registration Statement and the Final Prospectus; carrying out
                  certain specified procedures (but not an examination in
                  accordance with generally accepted auditing standards) which
                  would not necessarily reveal matters of significance with
                  respect to the comments set forth in such letter; a reading of
                  the minutes of the meetings of the stockholders, directors and
                  audit committees of the Company and the Subsidiaries; and
                  inquiries of certain officials of the Company who have
                  responsibility for financial and accounting matters of the
                  Company and its subsidiaries as to transactions and events
                  subsequent to December 31, 1999, nothing came to their
                  attention which caused them to believe that:

                           (1) any unaudited financial statements included or
                           incorporated by reference in the Registration
                           Statement and the Final Prospectus do not comply as
                           to form in all material respects with applicable
                           accounting requirements of the Act and with the
                           related rules and regulations adopted by the
                           Commission with respect to financial statements
                           included or incorporated by reference in quarterly
                           reports on Form 10-Q under the Exchange Act; and said
                           unaudited financial statements are not in conformity
                           with generally accepted accounting principles applied
                           on a basis substantially consistent with that of the
                           audited financial statements included or incorporated
                           by reference in the Registration Statement and the
                           Final Prospectus;

                           (2) with respect to the period subsequent to June 30,
                           2000, there were, at a specified date not more than
                           five days prior to the date of the letter, any
                           increases in the long-term debt or total current
                           liabilities of the Company and its subsidiaries or
                           decreases in the stockholders' equity of the Company
                           or decreases in total current assets or total assets
                           of the Company and its subsidiaries as compared with
                           the amounts shown on the June 30, 2000, consolidated
                           balance sheet included or incorporated by reference
                           in the Registration Statement and the Final
                           Prospectus, or for the period from July 1, 2000 to
                           such specified date there were any decreases, as
                           compared with the six months ended June 30, 1999 in
                           consolidated operating revenues or income before
                           income taxes or net income of the Company and its
                           subsidiar ies, except in all instances for changes or
                           decreases set forth in such letter, in which case the
                           letter shall be accompanied by an explanation by the
                           Company as to the significance thereof unless said
                           explanation is not deemed necessary by the
                           Representatives;


                           (3) the information included or incorporated by
                           reference in the Registration Statement and Final
                           Prospectus in response to Regulation S-K, Item 301
                           (Selected Financial Data) and Item 503(d) (Ratio of
                           Earnings to Fixed

                                       13

<PAGE>   14

                           Charges) is not in conformity with the applicable
                           disclosure require ments of Regulation S-K; and

                           (iii) they have performed certain other specified
                  procedures as a result of which they determined that certain
                  information of an accounting, financial or statistical nature
                  (which is limited to accounting, financial or statistical
                  information derived from the general accounting records of the
                  Company and its subsidiaries) set forth in the Registration
                  Statement and the Final Prospectus and in Exhibit 12 to the
                  Registration Statement, including the financial information
                  set forth under the captions "Summary and Consolidated
                  Financial and Operating Data", certain information included or
                  incorporated by reference in the Company's Annual Report on
                  Form 10-K, incorporated by reference in the Registration
                  Statement and the Final Prospectus, and certain information
                  included or incorporated by reference in the Company's
                  Quarterly Reports on Form 10-Q, incorporated by reference in
                  the Registration Statement and the Final Prospectus, agrees
                  with the accounting records of the Company and its
                  subsidiaries, excluding any questions of legal interpretation.

                  (g) Subsequent to the Execution Time or, if earlier, the dates
         as of which information is given in the Registration Statement
         (exclusive of any amendment thereof) and the Final Prospectus
         (exclusive of any supplement thereto), there shall not have been (i)
         any change or decrease in the items specified in the letter or letters
         referred to in paragraph (e) of this Section 6 or (ii) any change, or
         any development involving a prospective change, in or affecting the
         business or properties of the Company and its subsidiaries, taken as a
         whole, whether or not arising from transactions in the ordinary course
         of business, except as set forth in or contemplated in the Final
         Prospectus (exclusive of any supplement thereto) the effect of which,
         in any case referred to in clause (i) or (ii) above, is, in the
         reasonable judgment of the Representatives, so material and adverse as
         to make it impractical or inadvisable to proceed with the offering or
         delivery of the Securities as contemplated by the Registration
         Statement (exclusive of any amendment thereof) and the Final Prospectus
         (exclusive of any supplement thereto).

                  (h) Subsequent to the Execution Time, there shall not have
         been any decrease in the rating of any of the Company's debt securities
         by any "nationally recognized statistical rating organization" (as
         defined for purposes of Rule 436(g) under the Act) or any notice given
         of any intended or potential decrease in any such rating or of a
         possible change in any such rating that does not indicate the direction
         of the possible change.

                  (i) Prior to the Closing Date, the Company shall have
         furnished to the Representatives such further information, certificates
         and documents as the Representatives may reasonably request.

                  If any of the conditions specified in this Section 6 shall not
have been fulfilled in all material respects when and as provided in this
Agreement, or if any of the opinions and certificates


                                       14

<PAGE>   15

mentioned above or elsewhere in this Agreement shall not be in all material
respects reasonably satisfactory in form and substance to the Representatives
and counsel for the Underwriters, this Agreement and all obligations of the
Underwriters hereunder may be canceled at, or at any time prior to, the Closing
Date by the Representatives. Notice of such cancellation shall be given to the
Company in writing or by telephone or facsimile confirmed in writing.

                  The documents required to be delivered by this Section 6 shall
be delivered at the office of the Company, 1221 Nicollet Mall, Minneapolis,
Minnesota, on the Closing Date.

                  7. Reimbursement of Underwriters' Expenses. If the sale of the
Securities provided for herein is not consummated because any condition to the
obligations of the Underwriters set forth in Section 6 hereof is not satisfied,
because of any termination pursuant to Section 10 hereof or because of any
refusal, inability or failure on the part of the Company to perform any
agreement herein or comply with any provision hereof other than by reason of a
default by any of the Underwriters, the Company will reimburse the Underwriters
severally through Salomon Smith Barney Inc. on demand for all out-of-pocket
expenses (including reasonable fees and disbursements of counsel) that shall
have been incurred by them in connection with the proposed purchase and sale of
the Securities.

                  8.       Indemnification and Contribution.

                  (a) The Company agrees to indemnify and hold harmless each
         Underwriter, the directors, officers, employees and agents of each
         Underwriter and each person who controls any Underwriter within the
         meaning of either the Act or the Exchange Act against any and all
         losses, claims, damages or liabilities, joint or several, to which they
         or any of them may become subject under the Act, the Exchange Act or
         other Federal or state statutory law or regulation, at common law or
         otherwise, insofar as such losses, claims, damages or liabilities (or
         actions in respect thereof) arise out of or are based upon any untrue
         statement or alleged untrue statement of a material fact contained in
         the registration statement for the registration of the Securities as
         originally filed or in any amendment thereof, or in the Basic
         Prospectus, any Preliminary Final Prospectus or the Final Prospectus,
         or in any amendment thereof or supplement thereto, or arise out of or
         are based upon the omission or alleged omission to state therein a
         material fact required to be stated therein or necessary to make the
         statements therein not misleading, and agrees to reimburse each such
         indemnified party, as incurred, for any legal or other expenses
         reasonably incurred by them in connection with investigating or
         defending any such loss, claim, damage, liability or action; provided,
         however, that the Company will not be liable in any such case to the
         extent that any such loss, claim, damage or liability arises out of or
         is based upon any such untrue statement or alleged untrue statement or
         omission or alleged omission made therein in reliance upon and in
         conformity with written information furnished to the Company by or on
         behalf of any Underwriter through the Representatives specifically for
         inclusion therein; provided, further, that with respect to any untrue
         statement or omission of a material fact made in the Basic Prospectus
         or any Preliminary Final Prospectus, the indemnity agreement contained
         in this Section 8(a)


                                       15

<PAGE>   16



         shall not inure to the benefit of any Underwriter from whom the person
         asserting any such loss, claim, damage or liability purchased the
         Securities concerned, to the extent that any such loss, claim, damage
         or liability of such Underwriter occurs under the circumstance where it
         shall have been determined by a court of competent jurisdiction by
         final and nonappealable judgment that (w) the Company had previously
         furnished copies of the Final Prospectus to the Representatives, (x)
         delivery of the Final Prospectus was required to be made to such
         person, (y) the untrue statement or omission of a material fact
         contained in the Preliminary Final Prospectus was corrected in the
         Final Prospectus, and (z) there was not sent or given to such person,
         at or prior to the written confirmation of the sale of such Securities
         to such person, a copy of the Final Prospectus. This indemnity
         agreement will be in addition to any liability which the Company may
         otherwise have.

                  (b) Each Underwriter severally and not jointly agrees to
         indemnify and hold harmless the Company, each of its directors, each of
         its officers who signs the Registration Statement, and each person who
         controls the Company within the meaning of either the Act or the
         Exchange Act, to the same extent as the foregoing indemnity from the
         Company to each Underwriter, but only with reference to written
         information relating to such Underwriter furnished to the Company by or
         on behalf of such Underwriter through the Representatives specifically
         for inclusion in the documents referred to in the foregoing indemnity.
         This indemnity agreement will be in addition to any liability which any
         Underwriter may otherwise have. The Company acknowledges that the
         statements set forth in the last paragraph of the cover page regarding
         delivery of the Securities, and, under the heading "Underwriting", (i)
         the list of Underwriters and their respective participation in the sale
         of the Securities, (ii) the sentences related to concessions and
         reallowances and (iii) the paragraph related to stabilization,
         syndicate covering transactions and penalty bids constitute the only
         information furnished in writing by or on behalf of the several
         Underwriters for inclusion in any Preliminary Final Prospectus or the
         Final Prospectus.

                  (c) Promptly after receipt by an indemnified party under this
         Section 8 of notice of the commencement of any action, such indemnified
         party will, if a claim in respect thereof is to be made against the
         indemnifying party under this Section 8, notify the indemnifying party
         in writing of the commencement thereof; but the failure so to notify
         the indemnifying party (i) will not relieve it from liability under
         paragraph (a) or (b) above unless and to the extent it did not
         otherwise learn of such action and such failure results in the
         forfeiture by the indemnifying party of substantial rights and defenses
         and (ii) will not, in any event, relieve the indemnifying party from
         any obligations to any indemnified party other than the indemnification
         obligation provided in paragraph (a) or (b) above. The indemnifying
         party shall be entitled to appoint counsel of the indemnifying party's
         choice at the indemnifying party's expense to represent the indemnified
         party in any action for which indemnification is sought (in which case
         the indemnifying party shall not thereafter be responsible for the fees
         and expenses of any separate counsel retained by the indemnified party
         or parties except as set forth below); provided, however, that such
         counsel shall be satisfactory to the indemnified party. Notwithstanding
         the indemnifying party's election to appoint counsel to represent the

                                       16

<PAGE>   17


         indemnified party in an action, the indemnified party shall have the
         right to employ separate counsel (including local counsel), and the
         indemnifying party shall bear the reasonable fees, costs and expenses
         of such separate counsel if (i) the use of counsel chosen by the
         indemnifying party to represent the indemnified party would present
         such counsel with a conflict of interest, (ii) the actual or potential
         defendants in, or targets of, any such action include both the
         indemnified party and the indemnifying party and the indemnified party
         shall have reasonably concluded that there may be legal defenses
         available to it and/or other indemnified parties which are different
         from or additional to those available to the indemnifying party, (iii)
         the indemnifying party shall not have employed counsel satisfactory to
         the indemnified party to represent the indemnified party within a
         reasonable time after notice of the institution of such action or (iv)
         the indemnifying party shall authorize the indemnified party to employ
         separate counsel at the expense of the indemnifying party, it being
         understood that the indemnifying party shall not be liable for more
         than one separate firm (in addition to one local firm in each
         jurisdiction) for all indemnified parties in each jurisdiction in which
         any claim or action arising out of the same general allegations or
         circumstances is brought. An indemnifying party will not, without the
         prior written consent of the indemnified parties, settle or compromise
         or consent to the entry of any judgment with respect to any pending or
         threatened claim, action, suit or proceeding in respect of which
         indemnification or contribution may be sought hereunder (whether or not
         the indemnified parties are actual or potential parties to such claim
         or action) unless such settlement, compromise or consent includes an
         unconditional release of each indemnified party from all liability
         arising out of such claim, action, suit or proceeding. An indemnifying
         party will not, without the prior written consent of the indemnified
         party, enter into any settlement or compromise or consent to the entry
         of any judgment.

                  (d) In the event that the indemnity provided in paragraph (a)
         or (b) of this Section 8 is unavailable to or insufficient to hold
         harmless an indemnified party for any reason, the Company and the
         Underwriters severally agree to contribute to the aggregate losses,
         claims, damages and liabilities (including legal or other expenses
         reasonably incurred in connection with investigating or defending same)
         (collectively "Losses") to which the Company and one or more of the
         Underwriters may be subject in such proportion as is appropriate to
         reflect the relative benefits received by the Company on the one hand
         and by the Underwriters on the other from the offering of the
         Securities; provided, however, that in no case shall any Underwriter
         (except as may be provided in any agreement among underwriters relating
         to the offering of the Securities) be responsible for any amount in
         excess of the underwriting discount or commission applicable to the
         Securities purchased by such Underwriter hereunder. If the allocation
         provided by the immediately preceding sentence is unavailable for any
         reason, the Company and the Underwriters severally shall contribute in
         such proportion as is appropriate to reflect not only such relative
         benefits but also the relative fault of the Company on the one hand and
         of the Underwriters on the other in connection with the statements or
         omissions which resulted in such Losses as well as any other relevant
         equitable considerations. Benefits received by the Company shall be
         deemed to be equal to the total net proceeds from the offering (before
         deducting expenses) received by it, and

                                       17

<PAGE>   18


         benefits received by the Underwriters shall be deemed to be equal to
         the total underwriting discounts and commissions, in each case as set
         forth on the cover page of the Final Prospectus. Relative fault shall
         be determined by reference to, among other things, whether any untrue
         or any alleged untrue statement of a material fact or the omission or
         alleged omission to state a material fact relates to information
         provided by the Company on the one hand or the Underwriters on the
         other. The Company and the Underwriters agree that it would not be just
         and equitable if contribution were determined by pro rata allocation or
         any other method of allocation which does not take account of the
         equitable considerations referred to above. Notwithstanding the
         provisions of this paragraph (d), no person guilty of fraudulent
         misrepresentation (within the meaning of Section 11(f) of the Act)
         shall be entitled to contribution from any person who was not guilty of
         such fraudulent misrepresen tation. For purposes of this Section 8,
         each person who controls an Underwriter within the meaning of either
         the Act or the Exchange Act and each director, officer, employee and
         agent of an Underwriter shall have the same rights to contribution as
         such Underwriter, and each person who controls the Company within the
         meaning of either the Act or the Exchange Act, each officer of the
         Company who shall have signed the Registration Statement and each
         director of the Company shall have the same rights to contribution as
         the Company, subject in each case to the applicable terms and
         conditions of this paragraph (d).

                  9. Default by an Underwriter. If any one or more Underwriters
shall fail to purchase and pay for any of the Securities agreed to be purchased
by such Underwriter or Underwriters hereunder and such failure to purchase shall
constitute a default in the performance of its or their obligations under this
Agreement, the remaining Underwriters shall be obligated severally to take up
and pay for (in the respective proportions which the principal amount of
Securities set forth opposite their names in Schedule I hereto bears to the
aggregate principal amount of Securities set forth opposite the names of all the
remaining Underwriters) the Securities which the defaulting Underwriter or
Underwriters agreed but failed to purchase; provided, however, that in the event
that the aggregate principal amount of Securities which the defaulting
Underwriter or Underwriters agreed but failed to purchase shall exceed 10% of
the aggregate principal amount of Securities set forth in Schedule I hereto, the
remaining Underwriters shall have the right to purchase all, but shall not be
under any obligation to purchase any, of the Securities, and if such
nondefaulting Underwriters do not purchase all the Securities, this Agreement
will terminate without liability to any nondefaulting Underwriter or the
Company. In the event of a default by any Underwriter as set forth in this
Section 9, the Closing Date shall be postponed for such period, not exceeding
five Business Days, as the Representatives shall determine in order that the
required changes in the Registration Statement and the Final Prospectus or in
any other documents or arrangements may be effected. Nothing contained in this
Agreement shall relieve any defaulting Underwriter of its liability, if any, to
the Company and any nondefaulting Underwriter for damages occasioned by its
default hereunder.

                  10. Termination. This Agreement shall be subject to
termination in the absolute discretion of the Representatives, by notice given
to the Company prior to delivery of and payment for the Securities, if at any
time prior to such time (i) trading in the Company's Common Stock shall have
been suspended by the Commission or the New York Stock Exchange or trading in
securities

                                       18

<PAGE>   19

generally on the New York Stock Exchange shall have been suspended or
limited or minimum prices shall have been established on such Exchange, (ii) a
banking moratorium shall have been declared either by Federal or New York State
authorities or (iii) there shall have occurred any outbreak or escalation of
hostilities, declaration by the United States of a national emergency or war, or
other calamity or crisis the effect of which on financial markets is such as to
make it, in the reasonable judgment of the Representatives, impractical or
inadvisable to proceed with the offering or delivery of the Securities as
contemplated by the Final Prospectus (exclusive of any supplement thereto).

                  11. Representations and Indemnities to Survive. The respective
agreements, representations, warranties, indemnities and other statements of the
Company or its officers and of the Underwriters set forth in or made pursuant to
this Agreement will remain in full force and effect, regardless of any
investigation made by or on behalf of any Underwriter or the Company or any of
the officers, directors, employees, agents or controlling persons referred to in
Section 8 hereof, and will survive delivery of and payment for the Securities.
The provisions of Sections 7 and 8 hereof shall survive the termination or
cancellation of this Agreement.

                  12. Notices.  All communications hereunder will be in writing
and effective only on receipt, and, if sent to the Representatives, will be
mailed, delivered or telefaxed to the Salomon Smith Barney Inc. General Counsel
(fax no.: (212) 816-7912) and confirmed to the General Counsel, Salomon Smith
Barney Inc., at 388 Greenwich Street, New York, New York, 10013, Attention:
General Counsel; or, if sent to the Company, will be mailed, delivered or
telefaxed to James J. Bender, Vice President and General Counsel (fax no.: (612)
373-5392) and confirmed to it at NRG Energy, Inc., 1221 Nicollet Mall,
Minneapolis, Minnesota 55403, Attention: General Counsel.

                  13. Successors. This Agreement will inure to the benefit of
and be binding upon the parties hereto and their respective successors and the
officers, directors, employees, agents and controlling persons referred to in
Section 8 hereof, and no other person will have any right or obligation
hereunder.

                  14. Applicable Law.  This Agreement will be governed by and
construed in accordance with the laws of the State of New York applicable to
contracts made and to be performed within the State of New York.

                  15. Counterparts.  This Agreement may be signed in one or more
counterparts, each of which shall constitute an original and all of which
together shall constitute one and the same agreement.

                  16. Headings.  The section headings used herein are for
convenience only and shall not affect the construction hereof.

                  17. Definitions.  The terms which follow, when used in this
Agreement, shall have the meanings indicated.


                                       19

<PAGE>   20

                  "Act" shall mean the Securities Act of 1933, as amended and
         the rules and regulations of the Commission promulgated thereunder.

                  "Basic Prospectus" shall mean the prospectus referred to in
         paragraph 1(a) above contained in the Registration Statement at the
         Effective Date including any Preliminary Final Prospectus.

                  "Business Day" shall mean any day other than a Saturday, a
         Sunday or a legal holiday or a day on which banking institutions or
         trust companies are authorized or obligated by law, executive order or
         regulation to close in New York City.

                  "Commission" shall mean the Securities and Exchange
         Commission.

                  "Effective Date" shall mean each date and time that the
         Registration Statement, any post-effective amendment or amendments
         thereto and any Rule 462(b) Registration Statement became or become
         effective.

                  "Exchange Act" shall mean the Securities Exchange Act of 1934,
         as amended, and the rules and regulations of the Commission promulgated
         thereunder.

                  "Execution Time" shall mean the date and time that this
         Agreement is executed and delivered by the parties hereto.

                  "Final Prospectus" shall mean the prospectus supplement
         relating to the Securities that was first filed pursuant to Rule 424(b)
         after the Execution Time, together with the Basic Prospectus.

                  "Preliminary Final Prospectus" shall mean any preliminary
         prospectus supplement to the Basic Prospectus which describes the
         Securities and the offering thereof and is used prior to filing of the
         Final Prospectus, together with the Basic Prospectus.

                  "Registration Statement" shall mean the registration statement
         referred to in paragraph 1(a) above, including exhibits and financial
         statements, as amended at the Execution Time (or, if not effective at
         the Execution Time, in the form in which it shall become effective)
         and, in the event any post-effective amendment thereto or any Rule
         462(b) Registration Statement becomes effective prior to the Closing
         Date, shall also mean such


         registration statement as so amended or such Rule 462(b) Registration
         Statement, as the case may be. Such term shall include any Rule 430A
         Information deemed to be included therein at the Effective Date as
         provided by Rule 430A.

                  "Rule 415", "Rule 424", "Rule 430A" and "Rule 462" refer to
         such rules under the Act.

                                       20

<PAGE>   21


                  "Rule 430A Information" shall mean information with respect to
         the Securities and the offering thereof permitted to be omitted from
         the Registration Statement when it becomes effective pursuant to Rule
         430A.

                  "Rule 462(b) Registration Statement" shall mean a registration
         statement and any amendments thereto filed pursuant to Rule 462(b)
         relating to the offering covered by the registration statement referred
         to in Section 1(a) hereof.

                  "Trust Indenture Act" shall mean the Trust Indenture Act of
         1939, as amended and the rules and regulations of the Commission
         promulgated thereunder.

                                       21

<PAGE>   22



                  If the foregoing is in accordance with your understanding of
our agreement, please sign and return to us the enclosed duplicate hereof,
whereupon this letter and your acceptance shall represent a binding agreement
among the Company and the several Underwriters.

                                                  Very truly yours,

                                                  NRG Energy, Inc.



                                                  By:  _______________________
                                                  Name:
                                                  Title:

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

Salomon Smith Barney Inc.
Banc of America Securities LLC
Merrill Lynch, Pierce, Fenner & Smith Incorporated


By:  Salomon Smith Barney Inc.



By:  _________________________
        Name:
        Title:






                                       22

<PAGE>   23


                                   SCHEDULE I


                                                           Principal Amount
                                                           of Securities to
Underwriters                                                 be Purchased
------------                                               ----------------

Salomon Smith Barney Inc..................................   $157,500,000

Banc of America Securities LLC............................   $157,500,000

Merrill Lynch, Pierce, Fenner & Smith Incorporated........   $ 35,000,000
                                                             ------------

Total.....................................................   $350,000,000
                                                             ============










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