Document:

EX-4.2

 

EXHIBIT 4.2

EIGHTH SUPPLEMENTAL INDENTURE FOR

ADDITIONAL SUBSIDIARY GUARANTEES

     Eighth Supplemental Indenture (this “Supplemental Indenture for Additional
Guarantees”), dated as of November 13, 2006, among the guaranteeing subsidiaries listed on
Schedule A hereto (the “Guaranteeing Subsidiaries”), each an indirect subsidiary of NRG
Energy, Inc., a Delaware corporation (the “Company”), the Company, the existing guarantors set
forth on the signature page hereto (the “Existing Guarantors”) and Law Debenture Trust Company of
New York, as trustee under the indentures referred to below (the “Trustee”).

W I T N E S S E T H

     WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture
(the “Base Indenture”), dated as of February 2, 2006, between the Company and the Trustee, as
amended by a second supplemental indenture (the “Second Supplemental Indenture”), dated as of
February 2, 2006, among the Company, the Guarantors named therein and the Trustee, providing for
the original issuance of an aggregate principal amount of $2,400 million of 7.375% Senior Notes due
2016 (the “Initial Notes”), and, subject to the terms of the Indenture, future unlimited issuances
of 7.375% Senior Notes due 2016 (the “Additional Notes,” and together with the Initial Notes, the
“Notes”), a fourth supplemental indenture, dated as of March 14, 2006, among the Company, the
Existing Guarantors party thereto and the Trustee (the “Fourth Supplemental Indenture”) and a sixth
supplemental indenture, dated as of April 28, 2006, among the Company, the Existing Guarantors and
the Trustee (together with the Base Indenture, the Second Supplemental Indenture and the Fourth
Supplemental Indenture, the “Indenture”);

     WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing
Subsidiaries shall execute and deliver to the Trustee a supplemental indenture pursuant to which
the Guaranteeing Subsidiaries shall unconditionally guarantee all of the Company’s Obligations
under the Notes and the Indenture (the “Additional Guarantees”); and

     WHEREAS, pursuant to Section 4.17 of the Second Supplemental Indenture, the Trustee, the
Company and the other Guarantors are authorized and required to execute and deliver this
Supplemental Indenture for Additional Guarantees.

     NOW THEREFORE, in consideration of the foregoing and for good and valuable consideration, the
receipt of which is hereby acknowledged, the Guaranteeing Subsidiaries, the Trustee, the Company
and the other Guarantors mutually covenant and agree for the equal and ratable benefit of the
Holders of the Notes as follows:

     1. Capitalized
Terms. Unless otherwise defined in this Supplemental Indenture for
Additional Guarantees, capitalized terms used herein without definition shall have the meanings
assigned to them in the Indenture.

     2. Agreement to be Bound; Guarantee. Each of the Guaranteeing Subsidiaries hereby
becomes a party to the Second Supplemental Indenture as a Guarantor and as such will have all of
the rights and be subject to all of the Obligations and agreements of a Guarantor under the
Indenture. Each of the Guaranteeing Subsidiaries hereby agrees to be bound by all of the
provisions of the Second Supplemental Indenture applicable to a Guarantor and to perform all of the
Obligations and agreements of a Guarantor under the Second Supplemental Indenture. In furtherance
of the foregoing, each of the Guaranteeing Subsidiaries shall be deemed a Guarantor for purposes of
Article 10 of the Second Supplemental Indenture, including, without limitation, Section 10.02
thereof.

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     3. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE
USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE FOR ADDITIONAL GUARANTEES BUT WITHOUT GIVING EFFECT TO APPLICABLE
PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER
JURISDICTION WOULD BE REQUIRED THEREBY.

     4. Counterparts. The parties may sign any number of copies of this Supplemental
Indenture for Additional Guarantees. Each signed copy shall be an original, but all of them
together represent the same agreement.

     5. Effect of Headings. The Section headings herein are for convenience only and
shall not affect the construction hereof.

     6. The Trustee. The Trustee shall not be responsible in any manner whatsoever for
or in respect of the validity or sufficiency of this Supplemental Indenture for Additional
Guarantees or for or in respect of the recitals contained herein, all of which recitals are made
solely by the Guaranteeing Subsidiaries and the Company.

     7. Ratification of Indenture; Supplemental Indenture for Additional Guarantees Part of
Indenture. Except as expressly amended hereby, the Indenture is in all respects ratified and
confirmed and all the terms, conditions and provisions thereof shall remain in full force and
effect. This Supplemental Indenture for Additional Guarantees shall form a part of the Indenture
for all purposes, and every Holder of Notes heretofore or hereafter authenticated and delivered
shall by bound hereby.

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     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture for
Additional Guarantees to be duly executed and attested, all as of the date first above written.

	 	 	 	 	 	 	 
	 	 	Guaranteeing Subsidiaries:	 	 
	 
	 	 	 	 	 	 
	 	 	HUNTLEY IGCC LLC

INDIAN RIVER IGCC LLC

MONTVILLE IGCC LLC

PADOMA WIND POWER, LLC

HOFFMAN SUMMIT WIND PROJECT, LLC

SAN JUAN MESA WIND PROJECT II, LLC	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Clint Freeland
 

Clint Freeland
	 	 
	 

	 	Title:
	 	Treasurer	 	 
	 
	 	 	 	 	 	 
	 	 	LAKE ERIE PROPERTIES INC.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Clint Freeland
 

Clint Freeland
	 	 
	 

	 	Title:
	 	Vice President and Treasurer	 	 
	 
	 	 	 	 	 	 
	 	 	Issuer:	 	 
	 
	 	 	 	 	 	 
	 	 	NRG ENERGY, INC.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Clint Freeland
 

Clint Freeland
	 	 
	 

	 	Title:
	 	Vice President and Treasurer	 	 
	 
	 	 	 	 	 	 
	 	 	Existing Guarantors:	 	 
	 
	 	 	 	 	 	 
	 	 	ARTHUR KILL POWER LLC

ASTORIA GAS TURBINE POWER LLC

BERRIANS I GAS TURBINE POWER LLC

BIG CAJUN II UNIT 4 LLC

CABRILLO POWER I LLC

CABRILLO POWER II LLC

CHICKAHOMINY RIVER ENERGY CORP.

COMMONWEALTH ATLANTIC POWER LLC

CONEMAUGH POWER LLC

CONNECTICUT JET POWER LLC

DEVON POWER LLC	 	 

 

 

	 	 	 	 	 	 	 
	 	 	DUNKIRK POWER LLC

EASTERN SIERRA ENERGY COMPANY

EL SEGUNDO POWER LLC

EL SEGUNDO POWER II LLC

HANOVER ENERGY COMPANY

HUNTLEY POWER LLC

INDIAN RIVER OPERATIONS INC.

INDIAN RIVER POWER LLC

JAMES RIVER POWER LLC

KAUFMAN COGEN LP

KEYSTONE POWER LLC

LONG BEACH GENERATION LLC

LOUISIANA GENERATING LLC

MIDDLETOWN POWER LLC

MONTVILLE POWER LLC

NEO CALIFORNIA POWER LLC

NEO CHESTER-GEN LLC

NEO CORPORATION

NEO FREEHOLD-GEN LLC

NEO LANDFILL GAS HOLDINGS INC.

NEO POWER SERVICES INC.

NEW GENCO GP, LLC

NORWALK POWER LLC

NRG AFFILIATE SERVICES INC.

NRG ARTHUR KILL OPERATIONS INC.

NRG ASIA-PACIFIC, LTD.

NRG ASTORIA GAS TURBINE OPERATIONS, INC.

NRG BAYOU COVE LLC

NRG CABRILLO POWER OPERATIONS INC.

NRG CADILLAC OPERATIONS INC.

NRG CALIFORNIA PEAKER OPERATIONS LLC

NRG CONNECTICUT AFFILIATE SERVICES INC.

NRG DEVON OPERATIONS INC.

NRG DUNKIRK OPERATIONS INC.

NRG EL SEGUNDO OPERATIONS INC.

NRG GENERATION HOLDINGS, INC.

NRG HUNTLEY OPERATIONS INC.

NRG INTERNATIONAL LLC

NRG KAUFMAN LLC

NRG MESQUITE LLC

NRG MIDATLANTIC AFFILIATE SERVICES INC.

NRG MIDDLETOWN OPERATIONS INC.

NRG MONTVILLE OPERATIONS INC.

NRG NEW JERSEY ENERGY SALES LLC

NRG NEW ROADS HOLDINGS LLC

NRG NORTH CENTRAL OPERATIONS INC.

NRG NORTHEAST AFFILIATE SERVICES INC.

NRG NORWALK HARBOR OPERATIONS INC.

NRG OPERATING SERVICES, INC.

NRG OSWEGO HARBOR POWER OPERATIONS INC.

NRG POWER MARKETING INC.	 	 

 

 

	 	 	 	 	 	 	 
	 	 	NRG ROCKY ROAD LLC

NRG SAGUARO OPERATIONS INC.

NRG SOUTH CENTRAL AFFILIATE SERVICES INC.

NRG SOUTH CENTRAL GENERATING LLC

NRG SOUTH CENTRAL OPERATIONS INC.

NRG TEXAS LLC

NRG WEST COAST LLC

NRG WESTERN AFFILIATE SERVICES INC.

OSWEGO HARBOR POWER LLC

SAGUARO POWER LLC

SOMERSET OPERATIONS INC.

SOMERSET POWER LLC

TEXAS GENCO FINANCING CORP.

TEXAS GENCO GP, LLC

TEXAS GENCO HOLDINGS, INC.

TEXAS GENCO OPERATING SERVICES, LLC

VIENNA OPERATIONS INC.

VIENNA POWER LLC

WCP (GENERATION) HOLDINGS LLC

WEST COAST POWER LLC	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Clint Freeland
 

Clint Freeland
	 	 
	 

	 	Title:
	 	Treasurer	 	 
	 
	 	 	 	 	 	 
	 	 	GCP FUNDING COMPANY, LLC

NEW GENCO LP, LLC

TEXAS GENCO LP, LLC	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Susan T. Dubb
 

Susan T. Dubb
	 	 
	 

	 	Title:
	 	Treasurer and Secretary	 	 
	 
	 	 	 	 	 	 
	 	 	NRG SOUTH TEXAS LP	 	 
	 
	 	 	 	 	 	 
	 	 	By: Texas Genco GP, LLC, its General Partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Clint Freeland
 

Clint Freeland
	 	 
	 

	 	Title:
	 	Vice President and Treasurer	 	 
	 
	 	 	 	 	 	 
	 	 	NRG TEXAS LP

TEXAS GENCO SERVICES, LP	 	 
	 
	 	 	 	 	 	 
	 	 	By: New Genco GP, LLC, its General Partner	 	 

 

 

	 	 	 	 	 	 	 	 	 
	 

	 	 
	 	By:

Name:
	 	/s/ Clint Freeland
 

Clint Freeland
	 	 
	 

	 	 	 	Title:
	 	Vice President and Treasurer	 	 
	 
	 	 	 	 	 	 	 	 
	Attest:
	 	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	/s/ Tanuja M. Dehne
 

Name: Tanuja M. Dehne

	 	 	 	 	 	 	 	 
	Title: Corporate Secretary
	 	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	 	 	LAW DEBENTURE TRUST COMPANY OF NEW YORK,

     as Trustee
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	By:

Name:
	 	/s/ Daniel R. Fisher
 

Daniel R. Fisher
	 	 
	 

	 	 	 	Title:
	 	Senior Vice President	 	 

 

 

SCHEDULE A

SCHEDULE OF GUARANTEEING SUBSIDIARIES

	1.	 	Lake Erie Properties Inc., a Delaware corporation
	 
	2.	 	Huntley IGCC LLC, a Delaware limited liability company
	 
	3.	 	Indian River IGCC LLC, a Delaware limited liability company
	 
	4.	 	Montville IGCC LLC, a Delaware limited liability company
	 
	5.	 	Padoma Wind Power, LLC, a California limited liability company
	 
	6.	 	Hoffman Summit Wind Project, LLC, a California limited liability company
	 
	7.	 	San Juan Mesa Wind Project II, LLC, a Delaware limited liability companyEX-10.1

 

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EXHIBIT 10.1

NRG Energy, Inc.

$1,100,000,000

7.375% Senior Notes Due 2017

UNDERWRITING AGREEMENT

November 8, 2006

 

 

November 8, 2006

To the Representatives of the Underwriters named in Schedule II hereto

Ladies and Gentlemen;

     NRG Energy, Inc., a Delaware corporation (the “Company”), proposes to issue and sell to the
underwriters named in Schedule II hereto (the “Underwriters”), for whom you are acting as
representatives (the “Representatives”), the principal amount of its debt securities identified in
Schedule I hereto (the “Securities”), to be issued under the last supplemental indenture specified
in Schedule I hereto (the “Indenture”) between the Company and the Trustee identified in such
Schedule (the “Trustee”). If the firm or firms listed in Schedule II hereto include only the
Representatives listed in Schedule II hereto, then the terms “Underwriters” and “Representatives”
as used herein shall each be deemed to refer to such firm or firms. The terms “you” and “your” as
used herein shall be deemed to refer to the Representatives.

     The Company has filed with the Securities and Exchange Commission (the “Commission”) a
registration statement, including a prospectus (the file number of which is set forth in Schedule I
hereto), on Form S-3, relating to securities (the “Shelf Securities”), including the Securities, to
be issued from time to time by the Company. The registration statement as amended to the date of
this Agreement, including the information (if any) deemed to be part of the registration statement
at the time of effectiveness pursuant to Rule 430B under the Securities Act of 1933, as amended
(the “Securities Act”), is hereinafter referred to as the “Registration Statement,” and the related
prospectus covering the Shelf Securities dated December 21, 2005 in the form first used to confirm
sales of the Securities (or in the form first made available to the Underwriters by the Company to
meet requests of purchasers pursuant to Rule 173 under the Securities Act) is hereinafter referred
to as the “Basic Prospectus.” The Basic Prospectus, as supplemented by the prospectus supplement
specifically relating to the Securities in the form first used to confirm sales of the Securities
(or in the form first made available to the Underwriters by the Company to meet requests of
purchasers pursuant to Rule 173 under the Securities Act) is hereinafter referred to as the
“Prospectus,” and the term “preliminary prospectus” means any preliminary form of the Prospectus.
For purposes of this Agreement, “free writing prospectus” has the meaning set forth in Rule 405
under the Securities Act (which does not include communications not deemed a prospectus pursuant to
Rule 134 of the Securities Act and historical issuer information meeting the requirements of Rule
433(e)(2) of the Securities Act) and “Time of Sale Prospectus” means the Basic Prospectus, each
preliminary prospectus, and each free writing prospectus, if any, each identified in Basic Schedule
I hereto. As used herein, the terms “Registration
Statement,” “Basic Prospectus,” “preliminary prospectus,” “Time of Sale Prospectus” and “Prospectus” shall include the documents, if any,
incorporated by reference therein.

 

 

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The terms “supplement,”
“amendment,” and “amend” as used herein with respect to the Registration Statement, the Basic
Prospectus, the Time of Sale Prospectus, any preliminary prospectus or free writing prospectus
shall include all documents subsequently filed by the Company with the Commission pursuant to the
Securities Exchange Act of 1934, as amended (the “Exchange Act”), that are deemed to be
incorporated by reference therein.

     1. Representations and Warranties. The Company represents and warrants to and agrees with
each of the Underwriters that:

     (a) The Registration Statement has become effective; no stop order suspending the
effectiveness of the Registration Statement is in effect, and no proceedings for such purpose are
pending before or, to the knowledge of the Company, threatened by the Commission. The Company is a
well-known seasoned issuer (as defined in Rule 405 under the Securities Act) eligible to use the
Registration Statement as an automatic shelf registration statement and the Company has not
received notice that the Commission objects to the use of the Registration Statement as an
automatic shelf registration statement pursuant to Rule 401(g)(2) of the Securities Act.

     (b) (i) Each document, if any, filed or to be filed pursuant to the Exchange Act and
incorporated by reference in the Time of Sale Prospectus or the Prospectus complied or will comply
when so filed in all material respects with the Exchange Act and the applicable rules and
regulations of the Commission thereunder, (ii) each part of the Registration Statement, when such
part became effective, did not contain, and each such part, as amended or supplemented, if
applicable, will not contain any untrue statement of a material fact or omit to state a material
fact required to be stated therein or necessary to make the statements therein not misleading,
(iii) the Registration Statement as of the date hereof does not contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or necessary to make
the statements therein not misleading, (iv) the Registration Statement and the Prospectus comply,
and as amended or supplemented, if applicable, will comply in all material respects with the
Securities Act and the applicable rules and regulations of the Commission thereunder, (v) the Time
of Sale Prospectus does not, and at the time of each sale of the Securities in connection with the
offering and at the Closing Date (as defined in Section 4), the Time of Sale Prospectus, as then
amended or supplemented by the Company, if applicable, will not, contain any untrue statement of a
material fact or omit to state a material fact necessary to make the statements therein, in the
light of the circumstances under which they were made, not misleading and (vi) the Prospectus does
not contain and, as amended or

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supplemented, if applicable, will not contain any untrue statement
of a material fact or omit to state a material fact necessary to make the statements therein, in
the light of the circumstances under which they were made, not misleading, except that the
representations and warranties set forth in this paragraph do not
apply to (A) statements or omissions in the Registration Statement, the Time of Sale
Prospectus or the Prospectus, each as amended or supplemented, based upon information relating to
any Underwriter furnished to the Company in writing by such Underwriter through the Representatives
expressly for use therein or (B) that part of the Registration Statement that constitutes the
Statement of Eligibility (Form T-1) under the Trust Indenture Act of 1939, as amended (the “Trust
Indenture Act”), of the Trustee.

     (c) The Company is not an “ineligible issuer” in connection with the offering pursuant to
Rules 164, 405 and 433 under the Securities Act. Any free writing prospectus that the Company is
required to file pursuant to Rule 433(d) under the Securities Act has been, or will be, filed with
the Commission in accordance with the requirements of the Securities Act and the applicable rules
and regulations of the Commission thereunder. Each free writing prospectus that the Company has
filed, or is required to file, pursuant to Rule 433(d) under the Securities Act or that was
prepared by or on behalf of or used or referred to by the Company complies or will comply in all
material respects with the requirements of the Securities Act and the applicable rules and
regulations of the Commission thereunder. Except for the free writing prospectuses, if any,
identified in Schedule I hereto, and electronic road shows each furnished to you before first use,
the Company has not prepared, used or referred to, and will not, without your prior consent,
prepare, use or refer to, any free writing prospectus.

     (d) The Company has been duly incorporated, is validly existing as a corporation in good
standing under the laws of the state of Delaware, has the corporate power and authority to own its
property and to conduct its business as described in the Time of Sale Prospectus, Prospectus and
Registration Statement and is duly qualified to transact business and is in good standing in each
jurisdiction in which the conduct of its business or its ownership or leasing of property requires
such qualification, except (i) to the extent that the failure to be so qualified or be in good
standing would not have a material adverse effect on the business or result of operations of the
Company and its subsidiaries, taken as a whole (a “Material Adverse Effect”) and (ii) for
jurisdictions not recognizing the legal concepts of good standing or qualification.

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     (e) Each domestic subsidiary of the Company has been duly organized, is validly existing in
good standing under the laws of the jurisdiction of its organization, has the power and authority
to own its property and to conduct its business as described in the Time of Sale Prospectus and is
duly qualified to

transact business and is in good standing in each jurisdiction in which the
conduct of its business or its ownership or leasing of property requires such qualification, except
(i) to the extent that the failure to be so qualified or be in good standing would not have a
Material Adverse Effect on the Company and its subsidiaries, taken as a whole and (ii) for
jurisdictions not recognizing the legal concepts of good standing or qualification. Except as set
forth in the Registration Statement,
Time of Sale Prospectus and Prospectus, all of the issued shares of capital stock, or equity
interests, as applicable of each subsidiary of the Company have been duly and validly authorized
and issued, are fully paid and non-assessable and (except (i) for directors’ qualifying shares or
foreign national qualifying capital stock, and (ii) as pledged to secure indebtedness of the
Company and/or its subsidiaries pursuant to credit facilities, indentures and other instruments
evidencing indebtedness as set forth in the Exchange Act Reports of the Company, Registration
Statement, Time of Sale Prospectus and Prospectus and existing on the date hereof) are owned
directly by the Company, free and clear of all liens, encumbrances, equities or claims.

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

     (g) The Indenture has been duly qualified under the Trust Indenture Act and has been duly
authorized, executed and, on the Closing Date will be, duly delivered by, and will be a valid and
binding agreement of, the Company, enforceable in accordance with its terms, subject to applicable
bankruptcy, insolvency and similar laws affecting creditors’ rights generally and equitable
principles of general applicability.

     (h) The Securities have been duly authorized and, when executed and authenticated in
accordance with the provisions of the Indenture and delivered to and paid for by the Underwriters
in accordance with the terms of this Agreement will be valid and binding obligations of the
Company, in each case enforceable in accordance with their respective terms, subject to applicable
bankruptcy, insolvency and similar laws affecting creditors’ rights generally and equitable
principles of general applicability, and will be entitled to the benefits of the Indenture.

     (i) The execution and delivery by the Company of, and the performance by the Company of its
obligations under, this Agreement, the Indenture and the Securities will not contravene (i) any
provision of the amended and restated certificate of incorporation or the amended and restated
by-laws of the Company, (ii) or any agreement or other instrument binding upon the Company or any
of its subsidiaries that is material to the Company and its subsidiaries, taken as a whole, (iii)
or any applicable law or judgment, order or decree of any governmental body, agency or court having
jurisdiction over the Company or any subsidiary except that, in the case of clauses (ii) and (iii),
for any contravention that would not have a Material Adverse Effect on the Company.

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No consent,
approval, authorization or order of, or qualification with, any governmental body or agency is
required for the performance by the Company of its obligations under this Agreement, the Indenture,
or the Securities, except (x) for such consent, approvals, authorizations, orders or qualifications
that have been obtained or where failure to do so would not have a Material Adverse Effect on
the Company and (y) for the registration of the Securities under the Securities Act, the
qualification of the Indenture under the Trust Indenture Act and such as may be required by the
securities or Blue Sky laws of the various states in connection with the offer and sale of the
Securities.

     (j) There has not occurred any material adverse change, or any development involving a
prospective material adverse change, in the condition, financial or otherwise, or in the earnings,
business or operations of the Company and its subsidiaries, taken as a whole, from that set forth
in the Time of Sale Prospectus.

     (k) There are no legal or governmental proceedings pending or, to the knowledge of the
Company, threatened to which the Company or any of its subsidiaries is a party or to which any of
the properties of the Company or any of its subsidiaries is subject other than proceedings that are
disclosed or described in all material respects in the Registration Statement, Time of Sale
Prospectus, or the Prospectus and proceedings that are not expected to have a Material Adverse
Effect, and there are no statutes, regulations, contracts or other documents that are required to
be described in the Registration Statement, Time of Sale Prospectus, or the Prospectus or to be
filed as exhibits to the Registration Statement that are not described in all material respects or
filed, or incorporated by reference as required.

     (l) Each preliminary prospectus supplement filed pursuant to Rule 424 under the Securities
Act, complied when so filed in all material respects with the Securities Act and the applicable
rules and regulations of the Commission thereunder.

     (m) 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 Prospectus will not be, required to
register as an “investment company” as such term is defined in the Investment Company Act of 1940,
as amended.

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     (n) The Company and any subsidiary of the Company that 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, subject to regulation under the Public Utility Holding Company Act of 2005
(“PUHCA”) as a “holding company,” as such term is defined in PUHCA, will be exempt in accordance
with 18 CFR § 366.3 from the accounting, record-retention and reporting requirements of PUHCA.

     (o) Except as set forth in the Registration Statement, Time of Sale Prospectus, or Prospectus,
each subsidiary of the Company that is subject to regulation as a “public utility” as such term is
defined in the Federal Power Act (“FPA”) and that makes sales of energy or capacity that are not
pursuant to a state
regulatory authority’s implementation of PURPA (as defined below) has an order from the
Federal Energy Regulatory Commission, such order not subject to any pending challenge,
investigation, complaint, or other proceeding (other than generic proceedings generally applicable
in the industry) (i) authorizing such subsidiary to engage in wholesale sales of electricity and,
to the extent permitted under its market-based rate tariff, other transactions at market-based
rates and (y) granting such waivers and blanket authorizations as are customarily granted to
entities with market-based rate authority, including blanket authorizations to issue securities and
to assume liabilities pursuant to Section 204 of the FPA.

     (p) With respect to any subsidiary that owns a “Qualifying Facility” (“QF”) as defined under
the Public Utility Regulatory Policies Act and the current rules and regulations promulgated
thereunder (“PURPA”), such facility is a QF under PURPA.

     (q) Except as disclosed in the Registration Statement, the Time of Sale Prospectus, or
Prospectus, and except for such matters as would not, individually or in the aggregate, result in a
Material Adverse Effect, the Company and its subsidiaries (1) are conducting and have conducted
their businesses, operations and facilities in compliance with Environmental Laws (as defined
below); (2) have duly obtained, possess, maintain in full force and effect, and have fulfilled and
performed all of their obligations under any and all permits, licenses or registrations required
under Environmental Law (“Environmental Permits”); (3) have not received any notice from a
governmental authority or any other third party alleging any violation of Environmental Law or
liability thereunder; (4) are not subject to any pending or, to the best knowledge of the Company
or any of its subsidiaries, threatened claim in writing or other legal proceeding under any
Environmental Laws against the Company or any of its subsidiaries; and (5) do not have knowledge of
any applicable Environmental Laws, or any unsatisfied conditions in an Environmental Permit, that,
individually or in the aggregate, can reasonably be expected to require any material capital
expenditures for either the installation of new pollution control equipment, or a switch in a
project’s fuel or any other material modification of current
operations in order to maintain the Company’s or the subsidiaries’ compliance with Environmental Law.

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As used in this paragraph,
“Environmental Laws” means any and all applicable foreign, federal, state and local laws and
regulations, or any enforceable administrative or judicial interpretation thereof, relating to
pollution or the protection of human health or the environment, including, without limitation,
those relating to (i) emissions, discharges or releases of Hazardous Substances into ambient air,
surface water, groundwater or land, (ii) the generation, manufacture, processing, distribution,
use, treatment, storage, disposal, release, transport or handling of, or exposure to, Hazardous
Substances, (iii) the protection of wildlife or endangered or threatened species, or (iv) the
investigation, remediation or cleanup of any Hazardous Substances. As used in this paragraph,
“Hazardous Substances” means pollutants, contaminants, hazardous substances, materials or wastes,
petroleum, petroleum products and their breakdown constituents, or any other chemical
substance regulated under Environmental Laws.

     2. Agreements to Sell and Purchase. The Company hereby agrees to sell to the several
Underwriters, and each Underwriter, upon the basis of the representations and warranties herein
contained, but subject to the conditions hereinafter stated, agrees, severally and not jointly, to
purchase from the Company the respective principal amounts of Securities set forth in Schedule II
hereto opposite its name at the purchase price set forth in Schedule I hereto.

     3. Public Offering. The Company is advised by you that the Underwriters propose to make a
public offering of their respective portions of the Securities as soon after this Agreement has
become effective as in your judgment is advisable. The Company is further advised by you that the
Securities are to be offered to the public upon the terms set forth in the Time of Sale Prospectus.

     4. Payment and Delivery. Payment for the Underwriters’ Securities shall be made by wire
transfer in immediately available funds, or other funds immediately available in New York City on
the closing date and time set forth in Schedule I hereto, or at such other time on the same or such
other date, not later than the fifth business day thereafter, as may be designated by you in
writing. The time and date of such payment are hereinafter referred to as the “Closing Date.”

     Payment for the Securities shall be made against delivery to you on the Closing Date for the
respective accounts of the several Underwriters of the Securities registered in such names and in
such denominations as you shall request in writing not less than two business day prior to the
Closing Date, with any transfer taxes payable in connection with the transfer of the Securities to
the Underwriters duly paid, against payment of the purchase price therefor.

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     The Company hereby confirms its engagement of Merrill Lynch, Pierce, Fenner & Smith
Incorporated as, and Merrill Lynch, Pierce, Fenner & Smith Incorporated hereby confirms its
agreement with the Company to render services as, a “qualified independent underwriter” within the
meaning of Rule 2720 of the Conduct Rules of the National Association of Securities Dealers, Inc.
with respect to the offering and sale of the Securities. Merrill Lynch, Pierce, Fenner & Smith
Incorporated, solely in its capacity as qualified independent underwriter and not otherwise, is
referred to herein as the “Independent Underwriter.”

     5. Conditions to the Underwriters’ Obligations. The several obligations of the Underwriters
are subject to the following conditions:

     (a) Subsequent to the execution and delivery of this Agreement and prior to the Closing Date:

     (i) there shall not have occurred any downgrading, nor shall the Company have
received any notice from any “nationally recognized statistical rating organization,” as
such term is defined for purposes of Rule 436(g)(2) under the Securities Act of any
intended or potential downgrading or of any review for a possible change that does not
indicate the direction of the possible change, in the rating accorded the Company or any
of the securities of the Company or any of its subsidiaries or in the rating outlook for
the Company; and

     (ii) there shall not have occurred any change, or any development involving a
prospective change, in the condition, financial or otherwise, or in the earnings, business
or operations of the Company and its subsidiaries, taken as a whole, from that set forth
in the Time of Sale Prospectus that, in the judgment of the Representatives, is material
and adverse and that makes it, in the judgment of the Representatives, impracticable or
inadvisable to proceed with the offer, sale and delivery of the securities, or market the
Securities on the terms and in the manner contemplated in the this agreement and Time of
Sale Prospectus.

     (b) The Underwriters shall have received on the Closing Date a certificate, dated the Closing
Date and signed by an executive officer of the Company, to the effect set forth in Section 5(a)(i)
above and to the effect that the representations and warranties of the Company contained in this
Agreement that are not qualified by materiality are true and correct in all material respects, and
that the representations and warranties of the Company contained in this Agreement that are
qualified by materiality are true and correct, in each case, as of the Closing Date, and that the
Company has complied in all material respects with all of the agreements and satisfied all of the
conditions on its part to be performed or satisfied hereunder on or before the Closing Date.

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     The officer signing and delivering such certificate may rely upon the best of his or her
knowledge as to proceedings threatened.

     (c) The Underwriters shall have received on the Closing Date an opinion and a negative
assurance letter of Kirkland & Ellis LLP, outside counsel for the Company, dated the Closing Date,
to the effect set forth on Schedule III. Additionally, Tim O’Brien, General Counsel of the
Company, and other local counsel of the Company shall provide opinions, dated the Closing Date, as
the Representatives shall reasonably request.

     (d) The Underwriters shall have received on the Closing Date an opinion and a negative
assurance letter of Latham & Watkins LLP, counsel for the Underwriters, dated the Closing Date to
the effect set forth on Schedule III.

     (e) The Underwriters shall have received, on each of the date hereof and the Closing Date, a
letter dated the date hereof or the Closing Date, as the case may be, in form and substance
satisfactory to the Underwriters, from KPMG LLP and PricewaterhouseCoopers LLP, independent public
accountants, containing statements and information of the type ordinarily included in accountants’
“comfort letters” to underwriters with respect to the financial statements and certain financial
information contained in the Registration Statement, the Time of Sale Prospectus and the
Prospectus; provided that the letter delivered on the Closing Date shall use a “cut-off date” not
earlier than the date hereof.

     6. Covenants of the Company. The Company covenants with each Underwriter as follows:

     (a) To furnish to the Representatives, without charge, a conformed copy of the Registration
Statement (without exhibits thereto) and to deliver to each of the Underwriters during the period
mentioned in Section 6(f) below, as many copies of the Time of Sale Prospectus, the Prospectus, any
documents incorporated therein by reference therein and any supplements and amendments thereto or
to the Registration Statement as the Representatives may reasonably request; provided, that the
Company shall not be required to furnish copies of the Prospectus if the conditions of Rule 172(c)
under the Securities Act are satisfied by the Company.

     (b) Before amending or supplementing the Registration Statement, the Time of Sale Prospectus
or the Prospectus, to furnish to the Representatives a copy of each such proposed amendment or
supplement and not to file any such proposed amendment or supplement to which the Representatives
reasonably object.

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     (c) To furnish to the Representatives a copy of each proposed free writing prospectus to be
prepared by or on behalf of, used by, or referred to by the Company and not to use or refer to any
proposed free writing prospectus to which the Representatives reasonably object.

     (d) Not to take any action that would result in an Underwriter or the Company being required
to file with the Commission pursuant to Rule 433(d) under the Securities Act a free writing
prospectus prepared by or on behalf of the Underwriters that the Underwriters otherwise would not
have been required to file thereunder. For the avoidance of doubt, this paragraph (d) shall not be
applicable to the November 8 Issuer FWP (as defined below).

     (e) If the Time of Sale Prospectus is being used to solicit offers to buy the Securities at a
time when the Prospectus is not yet available to prospective purchasers and any event shall occur
or condition exist as a result of which the
Time of Sale Prospectus would include an untrue statement of a material fact or omit to state
a material fact required to be stated therein or necessary in order to make the statements therein,
in the light of the circumstances, not misleading, or if any event shall occur or condition exist
as a result of which, in the reasonable opinion of counsel for the Underwriters or counsel for the
Company, the Time of Sale Prospectus conflicts with the information contained in the Registration
Statement then on file, or if, in the reasonable opinion of counsel for the Underwriters or counsel
for the Company, it is necessary to amend or supplement the Time of Sale Prospectus to comply with
applicable law, forthwith to prepare, file with the Commission and furnish, at its own expense, to
the Underwriters and to any dealer upon request, either amendments or supplements to the Time of
Sale Prospectus so that either the statements in the Time of Sale Prospectus as so amended or
supplemented will not, in the light of the circumstances when delivered to a prospective purchaser,
be misleading or so that the Time of Sale Prospectus, as amended or supplemented, will no longer
conflict with the Registration Statement, or so that the Time of Sale Prospectus, as amended or
supplemented, will comply with applicable law.

     (f) If, during such period after the first date of the public offering of the Securities as in
the reasonable opinion of counsel for the Underwriters the Prospectus (or in lieu thereof the
notice referred to in Rule 173(a) under the Securities Act) is required by law to be delivered in
connection with sales by an Underwriter or dealer, any event shall occur or condition exist as a
result of which, in the reasonable opinion of counsel for the Underwriters or counsel for the
Company, the Prospectus would include any untrue statement of a material

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fact or omit to state a
material
fact required to be stated therein or necessary in order to make the statements therein,
in the light of the circumstances when the Prospectus (or in lieu thereof the notice referred to in
Rule 173(a) under the Securities Act) is delivered to a purchaser, not misleading, or if, in the
reasonable opinion of counsel for the Underwriters or counsel for the Company, it is necessary to
amend or supplement the Prospectus to comply with applicable law, forthwith to prepare, file with
the Commission and furnish, at its own expense, to the Underwriters and to the dealers (whose names
and addresses you will furnish to the Company) to which Securities may have been sold by you on
behalf of the Underwriters and to any other dealers upon request, either amendments or supplements
to the Prospectus so that either the statements in the Prospectus as so amended or supplemented
will not, in the light of the circumstances when the Prospectus (or in lieu thereof the notice
referred to in Rule 173(a) under the Securities Act) is delivered to a purchaser, be misleading or
so that the Prospectus, as amended or supplemented, will comply with applicable law; provided, that
the Company shall not be required to furnish copies of the Prospectus if the conditions of Rule
172(c) under the 1933 Act are satisfied by the Company.

     (g) To use its reasonable best efforts to qualify the Securities for offer and sale under the
securities or Blue Sky laws of such jurisdictions as you shall reasonably request; provided,
however, that nothing contained herein shall require the Company to qualify to do business in any
jurisdiction, to execute a general consent to service of process in any state or to subject itself
to taxation in any jurisdiction in which it is otherwise not so subject.

     (h) To make generally available to the Company’s security holders and to the Representatives
as soon as practicable an earning statement covering a period of at least twelve months beginning
with the first fiscal quarter of the Company occurring after the date of this Agreement which shall
satisfy the provisions of Section 11(a) of the Securities Act and the rules and regulations of the
Commission thereunder.

     (i) Whether or not the transactions contemplated in this Agreement are consummated or this
Agreement is terminated, to pay or cause to be paid the costs and expenses relating to the
following matters: (i) the fees, disbursements and expenses of the Company’s counsel and the
Company’s accountants in connection with the registration and delivery of the Securities under the
Securities Act and all other fees or expenses in connection with the preparation and filing of the
Registration Statement, any preliminary prospectus, the Time of Sale Prospectus, the Prospectus,
any free writing prospectus prepared by or on behalf of, used by, or referred to by the Company and
amendments and supplements to any of the foregoing, including the filing fees payable to the
Commission relating

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to the Securities (within the time required by Rule 456 (b)(1), if applicable),
all printing costs associated therewith, and the mailing and delivering of copies thereof to the
Underwriters and dealers, in the quantities hereinabove specified, (ii) all costs and expenses
related to the transfer and delivery of the Securities to the Underwriters, including any transfer
or other taxes payable thereon, (iii) the cost of printing or producing any Blue Sky or legal
investment memorandum in connection with the offer and sale of the Securities under state
securities laws and all expenses in connection with the qualification of the Securities for offer
and sale under state securities laws as provided in Section 6(f) hereof, including filing fees and
the reasonable fees and disbursements of counsel for the Underwriters in connection with such
qualification and in connection with the Blue Sky or legal investment memorandum, which shall be
$10,000 in the aggregate for this offering and the concurrent offerings by the Company of its
common stock and mandatory convertible preferred stock, (iv) any fees charged by the rating
agencies for the rating of the Securities, (v) the cost of the preparation, issuance and delivery
of the Securities, (vi) the costs and charges of any trustee, transfer agent, registrar or
depositary, (vii) the document production charges and expenses associated with printing this
Agreement and (viii) all other costs and expenses incident to the performance of the obligations of
the Company hereunder for which provision is not otherwise made in this Section; provided however
that any costs and expenses of the Company relating to investor presentations on any “road
show” undertaken in connection with the marketing or the offering of the Securities,
including, without limitation, expenses associated with the preparation or dissemination of any
electronic road show, expenses associated with the production of road show slides and graphics,
fees and expenses of any consultants engaged in connection with the road show presentations, travel
and lodging expenses of the representatives and officers of the Company and any such consultants,
and the cost of any aircraft chartered in connection with the road show, shall be paid or caused to
be paid by the Underwriters. It is understood, however, that except as provided in this Section,
Section 8 entitled “Indemnity and Contribution,” and the last paragraph of Section 10 below, the
Underwriters will pay all of their costs and expenses, including fees and disbursements of their
counsel, transfer taxes payable on resale of any of the Securities by them and any advertising
expenses connected with any offers they may make.

     (j) To prepare the issuer free writing prospectus (as defined in Rule 433 promulgated under
the Securities Act) attached hereto as Exhibit A (the “November 8 Issuer FWP”) and to file such
November 8 Issuer FWP on November 8, 2006 as soon as reasonably practicable.

     (k) If the third anniversary of the initial effective date of the Registration Statement
occurs before all the Securities have been sold by the Underwriters, prior to the third anniversary
to file a new shelf registration statement and to take any other action necessary to permit the
public offering of the Securities to continue without interruption; references herein to the
Registration Statement shall include the new registration statement declared effective by the
Commission.

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     (l) During the period beginning on the date hereof and continuing to and including the Closing
Date, not to offer, sell, contract to sell or otherwise dispose of any debt securities of the
Company or warrants to purchase or otherwise acquire debt securities of the Company substantially
similar to the Securities (other than (i) the Securities, (ii) commercial paper issued in the
ordinary course of business or (iii) securities or warrants permitted with the prior written
consent of the Representatives, provided that nothing in this paragraph (l) shall be construed as a
limitation on the Company’s ability to consummate, or prevent the Company from consummating the
transactions as described in the Time of Sale Prospectus and the Final Prospectus under the heading
“The Transactions.”

     7. Covenant of the Underwriters. Each Underwriter severally covenants with the Company not to
take any action that would result in the Company being required to file with the Commission under
Rule 433(d) a free writing prospectus prepared by or on behalf of such Underwriter that otherwise
would not be required to be filed by the Company thereunder, but for the action of
the Underwriter. For the avoidance of doubt, this Section 7 shall not restrict the
dissemination by the Underwriters of the November 8 Issuer FWP.

     8. Indemnity and Contribution. (a) The Company agrees to indemnify and hold harmless each
Underwriter, each person, if any, who controls any Underwriter within the meaning of either Section
15 of the Securities Act or Section 20 of the Exchange Act and each affiliate of any Underwriter
within the meaning of Rule 405 under the Securities Act (provided that the Company’s
indemnification obligation shall not extend to any free writing prospectus required to be filed by
the Company due to an Underwriter’s breach of Section 7) from and against any and all losses,
claims, damages and liabilities (including, without limitation, any legal or other expenses
reasonably incurred in connection with defending or investigating any such action or claim) caused
by any untrue statement or alleged untrue statement of a material fact contained in the
Registration Statement or any amendment thereof, any preliminary prospectus, the Time of Sale
Prospectus, any free writing prospectus that the Company has filed, or is required to file,
pursuant to Rule 433(d) under the Securities Act or the Prospectus or any amendment or supplement
thereto (if the Company furnished any amendments or supplements thereto), or caused by any omission
or alleged omission to state therein a material fact required to be stated therein or necessary to
make the statements therein, (i) with respect to the Registration Statement or

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any amendment
thereof, not misleading, and (ii) with respect to any preliminary prospectus, the Time of Sale
Prospectus, any free writing prospectus that the Company has filed, or is required to file,
pursuant to Rule 433(d) under the Securities Act or the Prospectus or any amendment or supplement
thereto (if the Company furnished any amendments or supplements thereto), not misleading in light
of the circumstances under which they were made, except in each case insofar as such losses,
claims, damages or liabilities are caused by any such untrue statement or omission or alleged
untrue statement or omission based upon information relating to any Underwriter furnished to the
Company in writing by such Underwriter through the Representatives expressly for use therein.

     (b) Each Underwriter agrees, severally and not jointly, to indemnify and hold harmless the
Company, its directors, its officers who sign the Registration Statement and each person, if any,
who controls the Company within the meaning of either Section 15 of the Securities Act or Section
20 of the Exchange Act to the same extent as the foregoing indemnity from the Company to such
Underwriter, but only with reference to information relating to such Underwriter furnished to the
Company in writing by such Underwriter through the Representatives expressly for use in the
Registration Statement, any preliminary prospectus, the Time of Sale Prospectus, any other free
writing prospectus that the Company has filed, or is required to file, pursuant to Rule 433(d)
under the Securities Act or the Prospectus or any amendment or supplement thereto.

     (c) In case any proceeding (including any governmental investigation) shall be instituted
involving any person in respect of which indemnity may be sought
pursuant to Section 8(a) or 8(b),
such person (the “indemnified party”) shall promptly notify the person against whom such indemnity
may be sought (the “indemnifying party”) in writing and the indemnifying party, upon request of the
indemnified party, shall retain counsel chosen by the indemnifying party and reasonably
satisfactory to the indemnified party to represent the indemnified party and any others entitled to
indemnification pursuant to this section 9 the indemnifying party may designate in such proceeding
and shall pay the reasonably incurred fees and expenses of such counsel related to such proceeding
as incurred. In any such proceeding, any indemnified party shall have the right to retain its own
counsel, but the reasonably incurred fees and expenses of such counsel shall be at the expense of
such indemnified party unless (i) the indemnifying party and the indemnified party shall have
mutually agreed to the retention of such counsel or (ii) the named parties to any such proceeding
(including any impleaded parties) include both the indemnifying party and the indemnified party and
representation of both parties by the same counsel would be inappropriate due to actual or
potential differing interests between them. It is understood and agreed that the indemnifying
party shall not, in connection with

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any proceeding or related proceedings in the same jurisdiction,
be liable for the reasonably incurred fees and expenses of more than one separate firm (in addition
to any local counsel) for all such indemnified parties and that all such reasonably incurred fees
and expenses shall be reimbursed as they are incurred. Such firm shall be designated in writing by
the Representatives in the case of parties indemnified pursuant to
Section 8(a), and by the Company,
in the case of parties indemnified pursuant to Section 8(b). The indemnifying party shall not be
liable for any settlement of any proceeding effected without its written consent, but if settled
with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees
to indemnify the indemnified party from and against any loss or liability by reason of such
settlement or judgment. No indemnifying party shall, without the prior written consent of the
indemnified party, effect any settlement of any pending or threatened proceeding in respect of
which any indemnified party is or could have been a party and indemnity could have been sought
hereunder by such indemnified party, unless such settlement includes an unconditional release of
such indemnified party from all liability on claims that are the subject matter of such proceeding.

     (d) To
the extent the indemnification provided for in Section 8(a) or Section 8(b) is unavailable
to an indemnified party or insufficient in respect of any losses, claims, damages or liabilities
referred to therein, then each indemnifying party under such paragraph, in lieu of indemnifying
such indemnified party thereunder, shall contribute to the amount paid or payable by such
indemnified party as a result of such losses, claims, damages or liabilities (i) in such proportion
as is appropriate to reflect the relative benefits received by the indemnifying party or parties on
the one hand and the indemnified party or parties
on the other hand from the offering of the Securities or (ii) if the allocation provided by
clause 8(d)(i) above is not permitted by applicable law, in such proportion as is appropriate to
reflect not only the relative benefits referred to in clause 8(d)(i) above but also the relative fault
of the indemnifying party or parties on the one hand and of the indemnified party or parties on the
other hand in connection with the statements or omissions that resulted in such losses, claims,
damages or liabilities, as well as any other relevant equitable considerations. The relative
benefits received by the Company on the one hand and the Underwriters on the other hand in
connection with the offering of the Securities shall be deemed to be in the same respective
proportions as the net proceeds (before deducting expenses) received by the Company from the sale
of Securities and the total underwriting discounts and commissions received by the Underwriters in
connection therewith, in each case as set forth in the table on the cover page of the Prospectus
bear to the aggregate offering price of the Securities. The relative fault of the Company on the
one hand and the Underwriters on the other hand shall be determined by reference to, among other
things, whether the untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by the Company or by the
Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission. The Underwriters’ respective obligations to
contribute pursuant to this Section 8 are several in proportion to the respective principal amounts
of Securities they have purchased hereunder, and not joint.

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     (e) The Company and the Underwriters agree that it would not be just or equitable if
contribution pursuant to this Section 8 were determined by pro rata allocation (even if the
Underwriters were treated as one entity for such purpose) or by any other method of allocation that
does not take account of the equitable considerations referred to in Section 8(d). The amount paid
or payable by an indemnified party as a result of the losses, claims, damages and liabilities
referred to in Section 8(d) shall be deemed to include, subject to the limitations set forth above,
any legal or other expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim. Notwithstanding the provisions of this
Section 8, no Underwriter shall be required to contribute any amount in excess of the amount by
which the total price at which the Securities underwritten by it and distributed to the public were
offered to the public exceeds the amount of any damages that such Underwriter has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Securities Act) shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation. The remedies provided for in this Section 8 are not exclusive and
shall not limit any rights or remedies which may otherwise be available to any indemnified party at
law or in equity.

     (f) The indemnity and contribution provisions contained in this Section 8 and the
representations, warranties and other statements of the Company contained in this Agreement shall
remain operative and in full force and effect regardless of (i) any termination of this Agreement,
(ii) any investigation made by or on behalf of any Underwriter, any person controlling any
Underwriter or any affiliate of any Underwriter or by or on behalf of the Company, its officers or
directors or any person controlling the Company and (iii) acceptance of and payment for any of the
Securities.

     (g) In addition to and without limitation or duplication of the Company’s obligation to
indemnify Merrill Lynch, Pierce, Fenner & Smith Incorporated as an Underwriter, the Company also
agrees to indemnify and hold harmless the Independent Underwriter, its Affiliates and Selling
Agents and each person, if any, who controls the Independent Underwriter within the meaning of
Section 15 of the 1933 Act or Section 20 of the 1934 Act,
from and against any and all loss,
liability, claim, damage and expense whatsoever, as incurred, incurred solely as a result of the
Independent Underwriter’s participation as a “qualified independent underwriter” within the meaning
of Rule 2720 of the Conduct Rules of the National Association of Securities Dealers, Inc. in
connection with the offering of the Securities.

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If indemnity is sought pursuant to this section
8(g), then, in addition to the fees and expenses of such counsel for the indemnified parties, the
indemnifying party shall be liable for the reasonable fees and expenses of not more than one
counsel (in addition to any local counsel) separate from its own counsel and that of the other
indemnified parties for the Independent Underwriter in its capacity as a “qualified independent
underwriter” and all persons, if any, who control the Independent Underwriter within the meaning of
Section 15 of the 1933 Act or Section 20 of 1934 Act in connection with any one action or separate
but similar or related actions in the same jurisdiction arising out of the same general allegations
or circumstances if, in the reasonable judgment of the Independent Underwriter, there may exist a
conflict of interest between the Independent Underwriter and the other indemnified parties. Any
such separate counsel for the Independent Underwriter and such control persons of the Independent
Underwriter shall be designated in writing by the Independent Underwriter.

     9. Termination. The Underwriters may terminate this Agreement by notice given by the
Representatives to the Company, if after the execution and delivery of this Agreement and prior to
the Closing Date (i) trading generally shall have been suspended or materially limited on, or by,
as the case may be, any of the New York Stock Exchange or the Nasdaq National Market, (ii) trading
of any securities of the Company shall have been suspended on the New York Stock Exchange, (iii) a
material disruption in securities settlement, payment or clearance services in the United States
shall have occurred, (iv) any moratorium on commercial banking activities shall have been declared
by Federal or New York State authorities or (v) there shall have occurred any outbreak or
escalation of
hostilities, or any change in financial markets or any calamity or crisis that, in your
judgment, is material and adverse and which, singly or together with any other event specified in
this clause (v), makes it, in the Representatives judgment, impracticable or inadvisable to proceed
with the offer, sale or delivery of the Securities on the terms and in the manner contemplated in
the Time of Sale Prospectus or the Prospectus.

     10. Effectiveness; Defaulting Underwriters. This Agreement shall become effective upon the
execution and delivery hereof by the parties hereto.

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     If, on the Closing Date, any one or more of the Underwriters shall fail or refuse to purchase
Securities that it has or they have agreed to purchase hereunder on such date, and the aggregate
principal amount of Securities which such

defaulting Underwriter or Underwriters agreed but failed
or refused to purchase is not more than one-tenth of the aggregate principal amount of the
Securities to be purchased on such date, the other Underwriters shall be obligated severally in the
proportions that the principal amount of Securities set forth opposite their respective names in
Schedule II bears to the aggregate principal amount of Securities set forth opposite the names of
all such non-defaulting Underwriters, or in such other proportions as you may specify, to purchase
the Securities which such defaulting Underwriter or Underwriters agreed but failed or refused to
purchase on such date; provided that in no event shall the principal amount of Securities that any
Underwriter has agreed to purchase pursuant to this Agreement be increased pursuant to this Section
10 by an amount in excess of one-ninth of such principal amount of Securities without the written
consent of such Underwriter. If, on the Closing Date, any Underwriter or Underwriters shall fail
or refuse to purchase Securities and the aggregate principal amount of Securities with respect to
which such default occurs is more than one-tenth of the aggregate principal amount of Securities to
be purchased on such date, and arrangements satisfactory to you and the Company for the purchase of
such Securities are not made within 36 hours after such default, this Agreement shall terminate
without liability on the part of any non-defaulting Underwriter or the Company. In any such case
either you or the Company shall have the right to postpone the Closing Date, but in no event for
longer than seven days, in order that the required changes, if any, in the Registration Statement,
in the Time of Sale Prospectus, in the Prospectus or in any other documents or arrangements may be
effected. Any action taken under this paragraph shall not relieve any defaulting Underwriter from
liability in respect of any default of such Underwriter under this Agreement.

     If this Agreement shall be terminated by the Underwriters, or any of them, because of any
failure or refusal on the part of the Company to comply with the terms or to fulfill any of the
conditions of this Agreement (other than by reason of a default by any of the Underwriters
described in the preceding paragraph), or if for any reason the Company shall be unable to perform
its obligations under this Agreement the Company will reimburse the Underwriters or such
Underwriters as
have so terminated this Agreement with respect to themselves, severally, through the
Representatives for all out-of-pocket expenses (including the reasonable fees and disbursements of
their counsel) reasonably incurred by such Underwriters in connection with this Agreement or the
offering contemplated hereunder.

     11. Entire Agreement. (a) This Agreement, together with any contemporaneous written
agreements and any prior written agreements (to the extent not superseded by this Agreement) that
relate to the offering of the Securities, represents the entire agreement between the Company and
the Underwriters with respect to the preparation of any preliminary prospectus, the Time of Sale
Prospectus, the Prospectus, the conduct of the offering, and the purchase and sale of the
Securities.

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     (b) The Company acknowledges that in connection with the offering of the Securities: (i) the
Underwriters have acted at arms length, are not agents of, and owe no fiduciary duties to, the
Company or any other person, (ii) the Underwriters owe the Company only those duties and
obligations set forth in this Agreement and prior written agreements (to the extent not superseded
by this Agreement), if any, and (iii) the Underwriters may have interests that differ from those of
the Company. The Company waives to the full extent permitted by applicable law any claims it may
have against the Underwriters arising from an alleged breach of fiduciary duty in connection with
the offering of the Securities.

     12. Counterparts. This Agreement may be signed in two or more counterparts, each of which
shall be an original, with the same effect as if the signatures thereto and hereto were upon the
same instrument.

     13. Applicable Law. This Agreement shall be governed by and construed in accordance with the
internal laws of the State of New York.

     14. Headings. The headings of the sections of this Agreement have been inserted for
convenience of reference only and shall not be deemed a part of this Agreement.

     15. Notices. All communications hereunder shall be in writing and effective only upon receipt
and if to the Underwriters shall be delivered, mailed or sent to you at the address set forth in
Schedule I hereto; and if to the Company shall be delivered, mailed or sent to the address set
forth in Schedule I hereto.

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	 	 	Very truly yours,	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	NRG ENERGY, INC.	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	By:	 	/s/ Clint Freeland	 	 
	 	 	 	 	 	 	 
	 

	 	 	 	Name:
	 	Clint Freeland	 	 
	 

	 	 	 	Title:
	 	Vice President and Treasurer	 	 

	 	 	 
	 

	 	           GUARANTORS:
	 
	 	 
	 

	 	Arthur Kill Power LLC
	 

	 	Astoria Gas Turbine Power LLC
	 

	 	Berrians I Gas Turbine Power LLC
	 

	 	Big Cajun II Unit 4 LLC
	 

	 	Cabrillo Power I LLC
	 

	 	Cabrillo Power II LLC
	 

	 	Chickahominy River Energy Corp.
	 

	 	Commonwealth Atlantic Power LLC
	 

	 	Conemaugh Power LLC
	 

	 	Connecticut Jet Power LLC
	 

	 	Devon Power LLC
	 

	 	Dunkirk Power LLC
	 

	 	Eastern Sierra Energy Company
	 

	 	El Segundo Power, LLC
	 

	 	El Segundo Power II LLC
	 

	 	GCP Funding Company, LLC
	 
	 	 
	 

	 	Hanover Energy Company
	 
	 	 
	 

	 	Hoffman Summit Wind Project, LLC
	 

	 	Huntley IGCC LLC
	 

	 	Huntley Power LLC
	 

	 	Indian River IGCC LLC
	 

	 	Indian River Operations Inc.
	 

	 	Indian River Power LLC
	 

	 	James River Power LLC
	 

	 	Kaufman Cogen LP
	 

	 	Keystone Power LLC
	 

	 	Lake Erie Properties Inc.
	 

	 	Long Beach Generation LLC
	 
	 	 
	 

	 	Louisiana Generating LLC
	 
	 	 
	 

	 	Middletown Power LLC

 

 

	 	 	 
	 

	 	Montville IGCC LLC
	 

	 	Montville Power LLC
	 

	 	NEO California Power LLC
	 

	 	NEO Chester-Gen LLC
	 

	 	NEO Corporation
	 

	 	NEO Freehold-Gen LLC
	 

	 	NEO Landfill Gas Holdings Inc.
	 

	 	NEO Power Services Inc.
	 

	 	New Genco GP, LLC
	 

	 	New Genco LP, LLC
	 

	 	Norwalk Power LLC
	 

	 	NRG Affiliate Services Inc.
	 

	 	NRG Arthur Kill Operations Inc.
	 

	 	NRG Asia-Pacific, Ltd.
	 

	 	NRG Astoria Gas Turbine Operations Inc.
	 

	 	NRG Bayou Cove LLC
	 

	 	NRG Cabrillo Power Operations Inc.
	 

	 	NRG Cadillac Operations Inc.
	 

	 	NRG California Peaker Operations LLC
	 

	 	NRG Connecticut Affiliate Services Inc.
	 

	 	NRG Devon Operations Inc.
	 

	 	NRG Dunkirk Operations Inc.
	 

	 	NRG El Segundo Operations Inc.
	 

	 	NRG Generation Holdings, Inc.
	 

	 	NRG Huntley Operations Inc.
	 

	 	NRG International LLC
	 

	 	NRG Kaufman LLC
	 

	 	NRG Mesquite LLC
	 

	 	NRG MidAtlantic Affiliate Services Inc.
	 

	 	NRG Middletown Operations Inc.
	 

	 	NRG Montville Operations Inc.
	 

	 	NRG New Jersey Energy Sales LLC
	 
	 	 
	 

	 	NRG New Roads Holdings LLC
	 
	 	 
	 

	 	NRG North Central Operations Inc.
	 

	 	NRG Northeast Affiliate Services Inc.
	 

	 	NRG Norwalk Harbor Operations Inc.
	 

	 	NRG Operating Services, Inc.
	 

	 	NRG Oswego Harbor Power Operations Inc.
	 

	 	NRG Power Marketing Inc.

2

 

	 	 	 
	 

	 	NRG Rocky Road LLC
	 

	 	NRG Saguaro Operations Inc.
	 

	 	NRG South Central Affiliate Services Inc.
	 

	 	NRG South Central Generating LLC
	 

	 	NRG South Central Operations Inc.
	 

	 	NRG South Texas LP
	 

	 	NRG Texas LLC
	 
	 	 
	 

	 	NRG Texas LP
	 
	 	 
	 

	 	NRG West Coast LLC
	 

	 	NRG Western Affiliate Services Inc.
	 

	 	Oswego Harbor Power LLC
	 

	 	Padoma Wind Power, LLC
	 

	 	Saguaro Power LLC
	 

	 	San Juan Mesa Wind Project II, LLC
	 

	 	Somerset Operations Inc.
	 

	 	Somerset Power LLC
	 

	 	Texas Genco Financing Corp.
	 

	 	Texas Genco GP, LLC
	 

	 	Texas Genco Holdings, Inc.
	 

	 	Texas Genco LP, LLC
	 

	 	Texas Genco Operating Services, LLC
	 
	 	 
	 

	 	Texas Genco Services, LP
	 
	 	 
	 

	 	Vienna Operations Inc.
	 
	 	 
	 

	 	Vienna Power LLC
	 
	 	 
	 

	 	WCP (Generation) Holdings LLC
	 
	 	 
	 

	 	West Coast Power LLC

	 	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Clint Freeland 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Clint Freeland	 	 
	 

	 	Title:
	 	Authorized Signatory	 	 

3

 

	 	 	 	 	 
	Accepted as of the date hereof	 	 
	 
	 	 	 	 
	MERRILL LYNCH, PIERCE, FENNER &	 	 
	SMITH INCORPORATED	 	 
	 
	 	 	 	 
	By:
	 	/s/ Richard C. Stoddard 	 	 
	 

	 	 

Name: Richard C. Stoddard
	 	 
	 

	 	Title:   Managing Director
	 
	 	 	 	 
	MORGAN STANLEY & CO. INCORPORATED	 	 
	 
	 	 	 	 
	By:
	 	/s/ Todd J. Singer 
	 

	 	 

Name: Todd J. Singer
	 	 
	 

	 	Title:   Executive
Director
	Acting severally on behalf of themselves and	 	 
	 

	 	the several Underwriters named in	 	 
	 

	 	Schedule II hereto	 	 

4

 

SCHEDULE I

	 	 	 	 	 	 	 
	Representatives:
	 	 	 	 	 	 
	      Merrill Lynch, Pierce,
	 	 	 	 	 	 
	          Fenner & Smith Incorporated,
and
	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	      Morgan, Stanley & Co.
	 	 	 	 	 	 
	           Incorporated
	 	 	 	 	 	 
	Indentures:
	 	Base Indenture to be dated as of	 	 	 	 
	 
	 	February 2, 2006 between the Company	 	 	 	 
	 
	 	and the Trustee, as supplemented by	 	 	 	 
	 
	 	the Supplemental Indenture, to be	 	 	 	 
	 
	 	dated February 2, 2006 and as	 	 	 	 
	 
	 	further supplemented by the	 	 	 	 
	 
	 	Supplemental Indenture relating to	 	 	 	 
	 
	 	the Securities, to be dated November	 	 	 	 
	 
	 	21, 2006.	 	 	 	 
	 
	 	 	 	 	 	 
	Trustee:
	 	Law Debenture Trust Company of New	 	 	 	 
	 
	 	York	 	 	 	 
	 
	 	 	 	 	 	 
	Registration Statement File No.:
	 	333-130549	 	 	 	 

	 	 	 	 	 	 	 	 	 
	Time of Sale Prospectus
	 	1.	 	Prospectus dated December 21,	 	 	 	 
	 
	 	 	 	2005 relating to the Shelf	 	 	 	 
	 
	 	 	 	Securities	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 
	 	2.	 	the Preliminary Prospectus	 	 	 	 
	 
	 	 	 	Supplement, dated November 6, 2006	 	 	 	 
	 
	 	 	 	relating to the Securities	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 
	 	3.	 	the November 8 Issuer FWP	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 
	 	4.	 	the Company’s road show with	 	 	 	 
	 
	 	 	 	respect to the offering that	 	 	 	 
	 
	 	 	 	constitutes a written communication	 	 	 	 
	 
	 	 	 	pursuant to Rule 433 promulgated	 	 	 	 
	 
	 	 	 	under the Securities Act of 1933, as	 	 	 	 
	 
	 	 	 	amended	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	Securities to be purchased:	 	7.375% Senior Notes Due 2017	 	 	 	 

I-1

 

	 	 	 	 	 	 	 
	Aggregate Principal Amount:
	 	$1,100 million	 	 	 	 
	 
	 	 	 	 	 	 
	Purchase Price:
	 	100% of the principal amount of the	 	 	 	 
	 
	 	Securities, plus accrued interest,	 	 	 	 
	 
	 	if any, from November 8, 2006	 	 	 	 
	 
	 	 	 	 	 	 
	Maturity:
	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	7.375% Senior Notes Due 2017
	 	January 15, 2017	 	 	 	 
	 
	 	 	 	 	 	 
	Interest Rate:
	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	Coupon:
	 	7.375%	 	 	 	 
	 
	 	 	 	 	 	 
	Yield:
	 	7.375%	 	 	 	 
	 
	 	 	 	 	 	 
	Interest Payment Dates:
	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	7.375% Senior Notes Due 2017
	 	January 15 and July 15 commencing	 	 	 	 
	 
	 	July 15, 2007	 	 	 	 
	 
	 	 	 	 	 	 
	Closing Date and Time:
	 	November 21, 2006, 9:00 a.m.	 	 	 	 
	 
	 	 	 	 	 	 
	Closing Location:
	 	Latham & Watkins LLP	 	 	 	 
	 
	 	885 Third Avenue	 	 	 	 
	 
	 	New York, NY 10022	 	 	 	 
	 
	 	 	 	 	 	 
	Address for Notices to Underwriters:
	 	Merrill Lynch, Pierce, Fenner &	 	 	 	 
	 
	 	Smith Incorporated	 	 	 	 
	 
	 	4 World Financial Center	 	 	 	 
	 
	 	New York, New York 10080	 	 	 	 
	 
	 	 	 	 	 	 
	 
	 	Morgan Stanley & Co. Incorporated	 	 	 	 
	 
	 	1585 Broadway	 	 	 	 
	 
	 	New York, New York 10036	 	 	 	 
	 
	 	 	 	 	 	 
	Address for Notices to the Company:
	 	NRG Energy, Inc.	 	 	 	 
	 
	 	211 Carnegie Center	 	 	 	 
	 
	 	Princeton, NJ 08540-6213	 	 	 	 

2

 

SCHEDULE II

	 	 	 	 	 
	 	 	7.375% Senior Notes	 
	Underwriter	 	Due 2017	 
	Merrill Lynch, Pierce, Fenner & Smith
Incorporated
	 	$	770,000,000	 
	Morgan Stanley & Co. Incorporated
	 	 	330,000,000	 
	 
	 	 	 	 
	 
	 	 	 
	Total
	 	$	1,100,000,000	 
	 
	 	 	 

II-1

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