8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 12, 2012

DUKE ENERGY INDIANA, INC.

(Exact Name of Registrant as Specified in its Charter)

Indiana	1-3543	35-0594457
(State or Other Jurisdiction	(Commission	(IRS Employer
of Incorporation)	File Number)	Identification No.)

1000 East Main Street, Plainfield, Indiana  46168

(Address of Principal Executive Offices, including Zip code)

(704) 594-6200

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

oWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

oSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

oPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

oPre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240. 13e-4(c))

Item 8.01.   Other Events.

On March 12, 2012, Duke Energy Indiana, Inc. (the “Company”) entered into an underwriting agreement, dated as of March 12, 2012, with RBC Capital Markets, LLC, RBS Securities Inc. and UBS Securities LLC, as representatives of the several underwriters named therein (the “Underwriters”), pursuant to which the Company agreed to issue and sell to the Underwriters $250,000,000 aggregate principal amount of the Company’s First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042 (the “Bonds”). The Bonds will be issued under our Indenture of Mortgage or Deed of Trust, dated September 1, 1939, between the Company and Deutsche Bank National Trust Company, as Trustee, as amended and supplemented from time to time (the “Indenture”), including by the Sixty-Fifth Supplemental Indenture, dated as of March 15, 2012 (the “Supplemental Indenture”).  The disclosure in this Item 8.01 is qualified in its entirety by the provisions of the Indenture, the Supplemental Indenture, which is filed as Exhibit 4.1 hereto, and the Underwriting Agreement, which is filed as Exhibit 99.1 hereto. Such exhibits are incorporated herein by reference. Also, in connection with the issuance and sale of the Bonds, the Company is filing a legal opinion regarding the validity of the Bonds as Exhibit 5.1 to this Form 8-K for the purpose of incorporating the opinion into the Company’s Registration Statement No. 333-169633-02.

Item 9.01.      Financial Statements and Exhibits.

(d)  Exhibits

4.1	Sixty-Fifth Supplemental Indenture, dated as of March 15, 2012, between the Company and Deutsche Bank National Trust Company, as Trustee, providing for the issuance of the Bonds.
5.1	Opinion of Taft Stettinius & Hollister LLP regarding validity of the Bonds.
23.1	Consent of Taft Stettinius & Hollister LLP (included as part of Exhibit 5.1).
99.1	Underwriting Agreement, dated as of March 12, 2012, among the Company and RBC Capital Markets, LLC, RBS Securities Inc. and UBS Securities LLC, as representatives of the several underwriters named therein, in connection with the Company’s issuance and sale of the Bonds.

SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	DUKE ENERGY INDIANA, INC.
Date: March 15, 2012	By:	/s/ David S. Maltz
	Name: David S. Maltz
	Title:  Vice President and Corporate Secretary

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EXHIBIT INDEX

Exhibit	Description
4.1	Sixty-Fifth Supplemental Indenture, dated as of March 15, 2012, between the Company and Deutsche Bank National Trust Company, as Trustee, providing for the issuance of the Bonds.
5.1	Opinion of Taft Stettinius & Hollister LLP regarding validity of the Bonds.
23.1	Consent of Taft Stettinius & Hollister LLP (included as part of Exhibit 5.1).
99.1	Underwriting Agreement, dated as of March 12, 2012, among the Company and RBC Capital Markets, LLC, RBS Securities Inc. and UBS Securities LLC, as representatives of the several underwriters named therein, in connection with the Company’s issuance and sale of the Bonds.

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EX-4.1

Exhibit 4.1

SIXTY-FIFTH SUPPLEMENTAL

INDENTURE

TO

INDENTURE DATED SEPTEMBER 1, 1939

DUKE ENERGY INDIANA, INC.

TO

DEUTSCHE BANK NATIONAL TRUST COMPANY

AS TRUSTEE

DATED AS OF MARCH 15, 2012

CREATING FIRST MORTGAGE BONDS, SERIES UUU, 4.20%, DUE MARCH 15, 2042

AND

OTHERWISE SUPPLEMENTING AND AMENDING THE INDENTURE

TABLE OF CONTENTS

	Page
PARTIES:
Company (Duke Energy Indiana, Inc., formerly named each of PSI Energy, Inc. and Public Service Company of Indiana, Inc., and successor by consolidation to Initial Mortgagor (Public Service Company of Indiana)), and Trustee	1
RECITALS:
Indenture of the Initial Mortgagor, dated September 1, 1939, and First Supplemental Indenture thereto of the Initial Mortgagor, dated as of March 1, 1941	1
Consolidation of Initial Mortgagor (and four other companies) into the Company	1
Execution by Company of Second Supplemental Indenture to the original Indenture	1
Company substituted for Initial Mortgagor under Indenture	1
Execution by Company of Third through the Sixty-Fourth Supplemental Indentures to the original Indenture	2
Deutsche Bank National Trust Company appointed as Successor Trustee	3
Change of name of Company from Public Service Company of Indiana, Inc. to PSI Energy, Inc., and thereafter to Duke Energy Indiana, Inc.	3
Amount of bonds presently outstanding under the Indenture	3
Sixty-Fifth Supplemental Indenture and Bonds of Series UUU authorized	4
Conditions precedent performed	4
EXECUTING CLAUSE	4

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		Page
ARTICLE I.
FIRST MORTGAGE BONDS, SERIES UUU, 4.20%, DUE MARCH 15, 2042.
Section 1.	Creation and designation of Bonds of Series UUU	4
Section 2.	Bonds of Series UUU to be in registered form only	4
	Form of Face of Bond of Series UUU	9
	Form of Reverse of Bond of Series UUU	11
	Form of Trustee’s certificate	14
Section 3.	Date of Bonds of Series UUU	15
Section 4.	Maturity dates, interest rates and payment dates, and principal payments of Bonds of Series UUU	15
Section 5.	Place and manner of payment of Bonds of Series UUU	15
Section 6.	Denominations and numbering of definitive Bonds of Series UUU	15
	Temporary Bonds of Series UUU and exchange thereof for definitive bonds	15
Section 7	Maintenance and Renewal Fund shall not apply to Bonds of Series UUU	16
Section 8.	Inspection requirements shall not apply to Bonds of Series UUU	16
Section 9.	Company’s right to further amend the original Indenture	16
ARTICLE II.
ISSUANCE OF BONDS OF SERIES UUU.
Section 1.	Aggregate principal amount of Bonds of Series UUU issuable at once	17
Section 2.	Issuance of additional Bonds of Series UUU	17
ARTICLE III.
INDENTURE AMENDMENTS.
Section 1.	Amendments to Article I of the original Indenture	18
Section 2.	Amendments to Article VII of the original Indenture	18
Section 3.	No sinking fund for Bonds of Series UUU	20

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		Page
ARTICLE IV.
CONCERNING THE TRUSTEE.
Acceptance of trusts by Trustee		20
Trustee not responsible for validity or sufficiency of Sixty-Fifth Supplemental Indenture, etc.		20
Terms and conditions of Article XVII of the original Indenture to be applied to the Sixty-Fifth Supplemental Indenture		20
ARTICLE V.
MISCELLANEOUS PROVISIONS.
Section 1.	References in any article or section of the original Indenture refer to such article or section as amended by all Sixty-Five Supplemental Indentures thereto	20
Section 2.	Operation and construction of amendments to the original Indenture	20
Section 3.	All covenants, etc., for sole benefit of parties to the Sixty-Fifth Supplemental Indenture and holders of bonds	21
Section 4.	Table of contents and headings of articles not part of Sixty-Fifth Supplemental Indenture	21
Section 5.	Execution of Sixty-Fifth Supplemental Indenture in counterparts	21
Section 6.	Payments Due on Legal Holidays	21
ATTESTATION CLAUSE		22
SIGNATURES		22
ACKNOWLEDGMENT BY COMPANY		24
ACKNOWLEDGMENT BY TRUSTEE		25

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SIXTY-FIFTH SUPPLEMENTAL INDENTURE dated as of the 15th day of March, 2012, made and entered into by and between DUKE ENERGY INDIANA, INC. (hereinafter commonly referred to as the “Company”), a corporation organized and existing under the laws of the State of Indiana, formerly named each of PSI Energy, Inc. and Public Service Company of Indiana, Inc., and the successor by consolidation to Public Service Company of Indiana, an Indiana corporation, party of the first part, and DEUTSCHE BANK NATIONAL TRUST COMPANY, a national banking association organized and existing under the laws of the United States and having its office or place of business in the City of Chicago, State of Illinois, successor trustee to Bank of America, N.A., as successor by merger to LaSalle Bank National Association, which was the successor trustee to The First National Bank of Chicago (hereinafter commonly referred to as the “Trustee”), party of the second part,

WITNESSETH:

WHEREAS, Public Service Company of Indiana (hereinafter commonly referred to as the “Initial Mortgagor”), prior to its consolidation with certain other corporations to form the Company, executed and delivered to the Trustee a certain indenture of mortgage or deed of trust (hereinafter called the “original Indenture” when referred to as existing prior to any amendment thereto, and the “Indenture” when referred to as heretofore, now or hereafter amended), dated September 1, 1939, and a First Supplemental Indenture thereto, dated as of March 1, 1941, to secure the bonds of the Initial Mortgagor, its successors and assigns, issued from time to time under the Indenture in series for the purposes of and subject to the limitations specified in the Indenture; and

WHEREAS, the Company on September 6, 1941, became, through a consolidation, the successor of the Initial Mortgagor (and four other companies) and succeeded to all the rights and became liable for all the obligations of the Initial Mortgagor (and such other companies); and

WHEREAS, after said consolidation, the Company executed and delivered a Second Supplemental Indenture, dated as of November 1, 1941, to the original Indenture for the purposes, among others, of (i) the making by the Company of an agreement of assumption and adoption by it of the Indenture, (ii) the assumption by the Company of the bonds (and interest and premium, if any, thereon) issued or to be issued under the Indenture, and of all terms, covenants and conditions binding upon it under the Indenture, and the agreeing by the Company to pay, perform and fulfill the same, and (iii) the conveying to the Trustee upon the trusts declared in the Indenture, but subject to any outstanding liens and encumbrances, all the property which the Company then owned or which it might thereafter acquire, except property of a character similar to the property of the Initial Mortgagor which is excluded from the lien of the Indenture; and

WHEREAS, all conditions have been met and all acts and things necessary have been done and performed to make the Indenture the valid and binding agreement of the Company and to substitute the Company for the Initial Mortgagor under the Indenture, and to vest the Company with each and every right and power of the Initial Mortgagor, including the right and power to issue bonds thereunder; and

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WHEREAS, the Company has subsequently executed and delivered, for purposes authorized under the Indenture, a Third Supplemental Indenture dated as of March 1, 1942, a Fourth Supplemental Indenture dated as of May 1, 1943, a Fifth Supplemental Indenture dated as of August 1, 1944, a Sixth Supplemental Indenture dated as of September 1, 1945, a Seventh Supplemental Indenture dated as of November 1, 1947, an Eighth Supplemental Indenture dated as of January 1, 1949, a Ninth Supplemental Indenture dated as of May 1, 1950, a Tenth Supplemental Indenture dated as of July 1, 1952, an Eleventh Supplemental Indenture dated as of January 1, 1954, a Twelfth Supplemental Indenture dated as of October 1, 1957, a Thirteenth Supplemental Indenture dated as of February 1, 1959, a Fourteenth Supplemental Indenture dated as of July 15, 1960, a Fifteenth Supplemental Indenture dated as of June 15, 1964, a Sixteenth Supplemental Indenture dated as of January 1, 1969, a Seventeenth Supplemental Indenture dated as of March 1, 1970, an Eighteenth Supplemental Indenture dated as of January 1, 1971, a Nineteenth Supplemental Indenture dated as of January 1, 1972, a Twentieth Supplemental Indenture dated as of February 1, 1974, a Twenty-First Supplemental Indenture dated as of August 1, 1974, a Twenty-Second Supplemental Indenture dated as of August 1, 1975, a Twenty-Third Supplemental Indenture dated as of January 1, 1977, a Twenty-Fourth Supplemental Indenture dated as of October 1, 1977, a Twenty-Fifth Supplemental Indenture dated as of September 1, 1978, a Twenty-Sixth Supplemental Indenture dated as of September 1, 1978, a Twenty-Seventh Supplemental Indenture dated as of March 1, 1979, a Twenty-Eighth Supplemental Indenture dated as of May 1, 1979, a Twenty-Ninth Supplemental Indenture dated as of March 1, 1980, a Thirtieth Supplemental Indenture dated as of August 1, 1980, a Thirty-First Supplemental Indenture dated as of February 1, 1981, a Thirty-Second Supplemental Indenture dated as of August 1, 1981, a Thirty-Third Supplemental Indenture dated as of December 1, 1981, a Thirty-Fourth Supplemental Indenture dated as of December 1, 1982, a Thirty-Fifth Supplemental Indenture dated as of March 30, 1984, a Thirty-Sixth Supplemental Indenture dated as of November 15, 1984, a Thirty-Seventh Supplemental Indenture dated as of August 15, 1985, a Thirty-Eighth Supplemental Indenture dated as of October 1, 1986, a Thirty-Ninth Supplemental Indenture dated as of March 15, 1987, a Fortieth Supplemental Indenture dated as of June 1, 1987, a Forty-First Supplemental Indenture dated as of June 15, 1988, a Forty-Second Supplemental Indenture dated as of August 1, 1988, a Forty-Third Supplemental Indenture dated as of September 15, 1989, a Forty-Fourth Supplemental Indenture dated as of March 15, 1990, a Forty-Fifth Supplemental Indenture dated as of March 15, 1990, a Forty-Sixth Supplemental Indenture dated as of June 1, 1990, a Forty-Seventh Supplemental Indenture dated as of July 15, 1991, a Forty-Eighth Supplemental Indenture dated as of July 15, 1992, a Forty-Ninth Supplemental Indenture dated as of February 15, 1993, a Fiftieth Supplemental Indenture dated as of February 15, 1993, a Fifty-First Supplemental Indenture dated as of February 1, 1994, a Fifty-Second Supplemental Indenture dated as of April 30, 1999, a Fifty-Third Supplemental Indenture dated as of June 15, 2001, a Fifty-Fourth Supplemental Indenture dated as of September 1, 2002, a Fifty-Fifth Supplemental Indenture dated as of February 15, 2003, a Fifty-Sixth Supplemental Indenture dated as of December 1, 2004, a Fifty-Seventh Supplemental Indenture dated as of August 21, 2008, a Fifty-Eighth Supplemental Indenture dated as of December 19, 2008, a Fifty-Ninth Supplemental Indenture dated as

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of March 23, 2009, a Sixtieth Supplemental Indenture dated as of June 1, 2009, a Sixty-First Supplemental Indenture dated as of October 1, 2009, a Sixty-Second Supplemental Indenture dated as of July 9, 2010, a Sixty-Third Supplemental Indenture dated as of September 23, 2010, and a Sixty-Fourth Supplemental Indenture dated as of December 1, 2011, each supplementing and amending the Indenture; and

WHEREAS, the Thirty-Fifth Supplemental Indenture authorized and appointed LaSalle Bank National Association, a national banking association duly organized and existing under the law of the United States of America with its principal office in Chicago, Illinois and formerly named LaSalle National Bank, as Successor Trustee to The First National Bank of Chicago, which appointment was accepted, and all trust powers under the Indenture were thereby transferred from The First National Bank of Chicago to LaSalle Bank National Association; and

WHEREAS, by an Instrument of Resignation, Appointment and Acceptance dated as of December 15, 2008, Bank of America, N.A., as successor by merger to LaSalle Bank National Association, resigned as trustee and the Company appointed the Trustee as Successor Trustee thereto, which appointment was thereby accepted by the Trustee effective as of that date, and all trust powers were thereby transferred from Bank of America, N.A. to the Trustee; and

WHEREAS, the Forty-Sixth Supplemental Indenture amended the Indenture to reflect a change in the name of the Company from Public Service Company of Indiana, Inc. to PSI Energy, Inc. effective as of April 20, 1990, and the Fifty-Seventh Supplemental Indenture amended the Indenture to reflect a change in the name of the Company from PSI Energy, Inc. to Duke Energy Indiana, Inc., effective as of October 1, 2006; and

WHEREAS, as of March 15, 2012, the only bonds that have been heretofore issued under the Indenture which are now outstanding are $28,000,000 aggregate principal amount of “PSI Energy, Inc. First Mortgage Bonds, Series WW, Due August 15, 2027” and $53,055,000 aggregate principal amount of “PSI Energy, Inc. First Mortgage Bonds, Series CCC, 8.85%, Due January 15, 2022” and $38,000,000 aggregate principal amount of “PSI Energy, Inc. First Mortgage Bonds, Series DDD, 8.31%, Due September 1, 2032” and $500,000,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series LLL, 6.35%, Due August 15, 2038” and $47,700,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, 2005A Pledge Series, Due July 1, 2035” and $450,000,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series MMM, 6.45%, Due April 1, 2039” and $55,000,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series NNN, 6%, Due August 1, 2039” and $50,000,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series OOO, 4.95%, Due October 1, 2040” and $500,000,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series PPP, 3.75%, Due July 15, 2020” and $10,000,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series QQQ, 3¾%, Due April 1, 2022” and $59,600,000 aggregate principal

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amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series RRR, 33/8%, Due March 1, 2019” and $44,025,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series SSS, Due May 1, 2035” and $23,000,000 aggregate principal amount of “Duke Energy Indiana, Inc. First Mortgage Bonds, Series TTT, Due March 1, 2031”; and

WHEREAS, in accordance with the provisions of Section 1 of Article XVIII of the Indenture, the Board of Directors has authorized the execution and delivery by the Company of a Sixty-Fifth Supplemental Indenture, substantially in the form of this Sixty-Fifth Supplemental Indenture, for the purpose of creating a sixty-sixth series of bonds to be issued under the Indenture, to be known as “Duke Energy Indiana, Inc. First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042” (such bonds being hereinafter referred to as the “Bonds of Series UUU”), and prescribing the form and substance of the Bonds of Series UUU and the terms, provisions and characteristics thereof, and for the purpose of adding to the covenants and agreements of the Company for the protection of the bondholders and of the trust estate, of providing the terms and conditions for the redemption of the Bonds of Series UUU, of adding certain other covenants and undertakings with respect to the Bonds of Series UUU and of making such changes in the Indenture as are deemed necessary or desirable and as are permitted by the Indenture; and

WHEREAS, all conditions and requirements necessary to make this Sixty-Fifth Supplemental Indenture a valid, binding and legal instrument have been done, performed and fulfilled and the execution and delivery hereof have been in all respects duly authorized:

NOW, THEREFORE, in consideration of the premises, and of the acceptance and purchase of the Bonds of Series UUU by the holders and registered owners thereof, and of the sum of One Dollar ($1.00) duly paid by the Trustee to the Company, the receipt whereof is hereby acknowledged, and in accordance with and subject to the terms and provisions of the Indenture, the Company and the Trustee, respectively, have entered into, executed and delivered this Sixty-Fifth Supplemental Indenture for the uses and purposes hereinafter expressed, that is to say:

ARTICLE I.

FIRST MORTGAGE BONDS, SERIES UUU, 4.20%, DUE MARCH 15, 2042

Section 1.  There are hereby created a sixty-sixth series of bonds to be issued under and secured by the Indenture, to be designated as “Duke Energy Indiana, Inc. First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042” (such series being the Bonds of Series UUU hereinbefore referred to).

Section 2.  The following provisions shall apply to the Bonds of Series UUU.

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(a)  The Bonds of Series UUU shall be issued in fully registered form only.  However, except as provided elsewhere in this Section, the registered owner of all of the Bonds of Series UUU initially shall be The Depository Trust Company (“DTC”) or its nominee, and such Bonds of Series UUU initially shall be registered in the name of DTC or its nominee.  Payment of the principal of or interest on Bonds of Series UUU registered in the name of DTC or its nominee shall be made in the manner specified in DTC’s rules and by-laws.  DTC (and any successor securities depository) and its (or their) participating institutions (collectively “Participants”) shall maintain a book-entry registration and transfer system with respect to ownership of beneficial interests in the Bonds of Series UUU (the “Book-Entry System”).

(b)  The Bonds of Series UUU, initially shall be issued in the form of one or more authenticated, fully registered bonds for such series (each a “Global Security”) which (i) need not be in the form of a lithographed or engraved certificate, but may be typewritten or printed on ordinary paper or such paper as the Trustee may reasonably request, (ii) shall represent and be denominated in an amount equal to 100% of the aggregate principal amount of the Bonds of Series UUU issued under this Supplemental Indenture, (iii) shall be executed by the Company and authenticated by the Trustee in accordance with the provisions of the Indenture, (iv) shall be registered in the name of DTC or its nominee, and delivered to DTC or its nominee or a custodian therefor, and (v) shall contain the following legend on the face thereof:

Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to issuer or its agent for registration of transfer, exchange or payment, and any certificate issued is registered in the name of Cede & Co. or in such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered holder hereof, Cede & Co., has an interest herein.

Unless and until it is exchanged in whole or in part for Bonds of Series UUU in definitive certificated form, each Global Security representing the Bonds of Series UUU may not be transferred except as a whole by DTC to a nominee of DTC or by a nominee of DTC to DTC or another nominee of DTC or by DTC or any such nominee to a successor securities depository or a nominee of any such successor securities depository.

(c)  The Trustee and the Company may treat Cede & Co. or its nominee, or any successor securities depository or nominee thereof (collectively, the “Depository”) as the sole and exclusive owner of the Bonds of Series UUU,

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registered in its name for the purposes of payment of the principal or redemption price of or interest on the Bonds of Series UUU, giving any notice permitted or required to be given to holders of the Bonds of Series UUU, under the Indenture or this Supplemental Indenture, registering the transfer of the Bonds of Series UUU, obtaining any consent or other action to be taken by holders of the Bonds of Series UUU, and for all other purposes whatsoever and neither the Trustee nor the Company shall be affected by any notice to the contrary.  Neither the Company nor the Trustee nor any registrar nor any paying agent shall have any responsibility or obligation to any Participant, any person claiming a beneficial ownership interest in the Bonds of Series UUU under or through the Depository or any Participant, or any other person which is not shown on the registration books as being a holder of the Bonds of Series UUU with respect to (i) the accuracy of any records maintained by the Depository or any Participant; (ii) the payment by the Depository to any Participant of any amount in respect of the principal or redemption price of or interest on the Bonds of Series UUU; (iii) the payment by any Participant to any owner of a beneficial ownership interest in the Bonds of Series UUU, in respect of the principal of or interest on the Bonds of Series UUU or (iv) any consent or other action taken by the Depository as owner of the Bonds of Series UUU.  The Trustee shall pay all principal of and interest on the Bonds of Series UUU only to or upon the order of the registered holder or holders of the Bonds of Series UUU, as shown on the registration books, and all such payments shall be valid and effective to fully satisfy and discharge the Company’s obligations with respect to the principal or redemption price of and interest on the Bonds of Series UUU, to the extent of the sum or sums so paid. No person other than a holder of the Bonds of Series UUU, as shown on the registration books of DTC, shall receive an authenticated Bond evidencing the obligation of the Company to make payment of the principal of and interest on the Bonds of Series UUU, pursuant to the Indenture and this Supplemental Indenture. Upon delivery by DTC to the Trustee of written notice to the effect that DTC has determined to substitute a new nominee for Cede & Co, and subject to the provisions of the Indenture and this Supplemental Indenture, the word “Cede & Co.”, as used in this Supplemental Indenture, shall refer to each new nominee of DTC.

(d)  In the event that after the occurrence of an event of default that has not been cured or waived, holders of a majority in aggregate principal amount of the beneficial interests in the Bonds of Series UUU, as reflected in the books and records of the Depository, notify the Trustee, through the Depository or any Participant, that the continuation of the Book-Entry System is no longer in the best interests of such holders of beneficial interests in the Bonds of such Series, then the Trustee shall notify the Depository and the Company, and the Depository will notify the Participants of the availability through the Depository of definitive certificated Bonds of such Series.  In such event, the Company shall execute, and the Trustee, upon receipt of a written order of the Company, signed by its President or a Vice President and by its Treasurer, Assistant Treasurer, Secretary or Assistant Secretary (an “Issuer Order”), for the authentication and delivery of definitive certificated Bonds of Series UUU, will authenticate and deliver Bonds of such Series in definitive certificated form, in any authorized denominations, all pursuant to the provisions of the Indenture, to the person or persons specified to the Trustee in writing by the Depository in the aggregate principal amount of the

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applicable Global Security or Securities and in exchange for such Global Security or Securities.

(e)  If at any time the Depository notifies the Company that it is unwilling or unable to continue as Depository for the Bonds of Series UUU, or if at any time the Depository shall no longer be registered as a clearing agency in good standing under the Securities Exchange Act of 1934, as amended, or other applicable statute or regulation, the Company may appoint a successor Depository with respect to the Bonds of such Series.  If a successor Depository for the Bonds of such Series is not appointed by the Company within 90 days after the Company receives such notice or becomes aware of such condition, the Company will execute, and the Trustee, upon receipt of an Issuer Order for the authentication and delivery of definitive certificated Bonds of Series UUU, will authenticate and deliver Bonds of such Series in definitive certificated form, in any authorized denominations, all pursuant to the provisions of the Indenture, to the person or persons specified to the Trustee in writing by the Depository in the aggregate principal amount of the applicable Global Security or Securities and in exchange for such Global Security or Securities.

(f)  The Company may at any time and in its sole discretion determine that the Bonds of Series UUU shall no longer be represented by a Global Security or Securities.  In such event the Company will execute, and the Trustee, upon receipt of an Issuer Order for the authentication and delivery of definitive certificated Bonds of such Series, will authenticate and deliver Bonds of Series UUU in definitive certificated form, in any authorized denominations, all pursuant to the provisions of the Indenture, to the person or persons specified to the Trustee in writing by the Depository in the aggregate principal amount of the Global Security or Securities and in exchange for such Global Security or Securities.

(g)  Upon the exchange of any Global Security for the Bonds of Series UUU in definitive certificated form, in authorized denominations, the Global Security or Securities shall be cancelled by the Trustee.

(h)  Whenever the Depository requests the Company and the Trustee to do so, the Trustee and the Company will cooperate with the Depository in taking appropriate action after reasonable notice to (i) make available one or more separate Global Securities evidencing the Bonds of Series UUU to any Participant having Bonds of such Series credited to its account at the Depository, or (ii) arrange for another Depository to maintain custody of the Global Security or Securities evidencing the Bonds of Series UUU.

(i)  In connection with any notice or other communication to be provided to holders of the Bonds of Series UUU pursuant to the Indenture and this Supplemental Indenture by the Company or the Trustee with respect to any consent or other action to be taken by holders of the Bonds of such Series, the Company or the Trustee, as the case may be, shall establish a record date for such consent or other action and give the Depository notice of such record date not less than 15 calendar days in advance of such record date to the extent possible.  Such notice to the Depository shall be given only so long as a Depository or its nominee is the sole holder of the Bonds of Series UUU.

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The Bonds of Series UUU and the Trustee’s certificate to be endorsed thereon shall be substantially in the following form:

[THE REMAINDER OF THIS PAGE HAS BEEN LEFT BLANK INTENTIONALLY.]

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(FORM OF FACE OF BOND OF SERIES UUU)

[Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to issuer or its agent for registration of transfer, exchange or payment, and any certificate issued is registered in the name of Cede & Co. or in such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered holder hereof, Cede & Co., has an interest herein.](1)

No. UUU-R-	$
CUSIP No: 263901 AD 2
ISIN: US263901AD25

DUKE ENERGY INDIANA, INC.

FIRST MORTGAGE BOND, SERIES UUU, 4.20%,

DUE MARCH 15, 2042

Duke Energy Indiana, Inc., an Indiana corporation (hereinafter called the “Company”), for value received, hereby promises to pay to                             , or registered assigns, the principal sum of                                                            Dollars ($   ) on the fifteenth day of March, 2042 and to pay interest on said sum from the date hereof, until said principal sum is paid, at the rate of 4.20% per annum, payable semi-annually on the fifteenth day of March and September in each year. Both the principal of and the interest on this bond shall be payable in any coin or currency of the United States of America which at the time of payment is legal tender for the payment of public and private debts at the office or agency of the Company in Plainfield, Indiana, or, at the option of the registered owner hereof, at the office or agency of the Company in the Borough of Manhattan, the City of New York, State of New York, except that interest on this bond may be paid, at the option of the Company, by check or draft mailed to the address of the person entitled thereto as it appears on the books of the Company maintained for that purpose.

REFERENCE IS MADE TO THE FURTHER PROVISIONS OF THIS BOND SET FORTH ON THE REVERSE HEREOF.  SUCH FURTHER PROVISIONS SHALL FOR ALL PURPOSES HAVE THE SAME EFFECT AS THOUGH FULLY SET FORTH AT THIS PLACE.

This bond shall not be valid or become obligatory for any purpose unless and until it shall have been authenticated by the execution by the Trustee, or its successor in trust under the Indenture, of the certificate endorsed hereon.

(1)   This should be included only if the Bonds of Series UUU are being issued in global form.

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IN WITNESS WHEREOF, Duke Energy Indiana, Inc. has caused this bond to be executed in its name by the manual or facsimile signature of its President or an Executive Vice President or one of its Vice Presidents, and its corporate seal or a facsimile thereof to be hereto affixed and attested by the manual or facsimile signature of its Secretary or one of its Assistant Secretaries.

Dated as of:
		DUKE ENERGY INDIANA, INC.
		By
			President
ATTEST:
	Secretary

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(FORM OF REVERSE OF BOND OF SERIES UUU)

This bond is one of the bonds of the Company issued and to be issued from time to time under and in accordance with and all secured by an indenture of mortgage or deed of trust, dated September 1, 1939, from Public Service Company of Indiana (predecessor of the Company) to The First National Bank of Chicago, as Trustee, to which Deutsche Bank National Trust Company is successor trustee (which indenture as amended by all supplemental indentures is hereinafter referred to as the “Indenture”). Said Trustee or its successor in trust under the Indenture is hereinafter sometimes referred to as the “Trustee.” Reference is hereby made to the Indenture for a description of the property mortgaged and pledged and the nature and extent of the security for said bonds. By the terms of the Indenture, the bonds secured thereby are issuable in series which may vary as to date, amount, dates of maturity, rate of interest and in other respects as in the Indenture provided.

This bond is one of a series designated as “Duke Energy Indiana, Inc. First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042” (hereinafter referred to as the “Bonds of Series UUU”) of the Company issued under and secured by the Indenture and created by a Sixty-Fifth Supplemental Indenture, dated as of March 15, 2012 (the “Sixty-Fifth Supplemental Indenture”), which also amends the Indenture.

The rights and obligations of the Company and of the bearers and registered owners of bonds may be modified or amended with the consent of the Company by an affirmative vote of the bearers or registered owners entitled to vote of at least seventy-five per centum (75%) in principal amount of the bonds then outstanding at a meeting of bondholders called for the purpose (and by an affirmative vote of the bearers or registered owners entitled to vote of at least seventy-five per centum (75%) in principal amount of bonds of any series affected by such modification or amendment in case one or more, but less than all, series of bonds are so affected), all in the manner and subject to the limitations set forth in the Indenture, any consent by the bearer or registered owner of any bond being conclusive and binding upon such bearer or registered owner and upon all future bearers or registered owners of such bond, irrespective of whether or not any notation of such consent is made on such bond; provided that no such modification or amendment shall, among other things, extend the maturity or reduce the amount of, or reduce the rate of interest on, or otherwise modify the terms of the payment of the principal of, or interest or premium (if any) on this bond, which obligations are absolute and unconditional, or permit the creation of any lien ranking prior to or equal with the lien of the Indenture on any of the mortgaged property.  The Sixty-Fifth Supplemental Indenture provides that at any time when no bonds issued under the Indenture prior to the issuance of the “PSI Energy, Inc. First Mortgage Bonds, Series BBB, 8%, Due July 15, 2009” are outstanding, the Company reserves the right to amend the Indenture, without the consent or other action by the holders of the bonds outstanding at that time, to decrease the seventy-five per centum (75%) vote requirement referred to above to sixty-six and two-thirds per centum (66-2/3%).

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At any time before September 15, 2041, the Bonds of Series UUU will be redeemable in whole or in part, at the option of the Company at any time, at a redemption price equal to the greater of (1) 100% of the principal amount of the Bonds of Series UUU to be redeemed and (2) the sum of the present values of the remaining scheduled payments of principal and interest thereon (exclusive of interest accrued to the redemption date), discounted to the redemption date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus 0.15% (15 basis points), plus, in each case, accrued interest to the redemption date. For the avoidance of doubt, interest that is due and payable on an interest payment date falling on or prior to a redemption date will be payable on such interest payment date in accordance with the Bonds of Series UUU and the Indenture.  The Company shall notify the Trustee of the redemption price with respect to any redemption pursuant to this paragraph promptly after the calculation thereof. The Trustee shall not be responsible for calculating said redemption price.

At any time on or after September 15, 2041, the Bonds of Series UUU will be redeemable in whole or in part, at the option of the Company at any time, at a redemption price equal to 100% of the principal amount of such Bonds of Series UUU to be redeemed plus accrued interest to the date of redemption.

“Business Day” means any day other than a day on which banks in New York City are required or authorized to be closed.

“Comparable Treasury Issue” means the United States Treasury security selected by the Quotation Agent as having an actual or interpolated maturity comparable to the remaining term of the Bonds of Series UUU to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of a comparable maturity to the remaining term of the Bonds of Series UUU.

“Comparable Treasury Price” means, with respect to any redemption date for the Bonds of Series UUU, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (B) if the Quotation Agent obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations.

“Quotation Agent” means one of the Reference Treasury Dealers appointed by the Company.

“Reference Treasury Dealer” means each of RBC Capital Markets, LLC, RBS Securities Inc. and UBS Securities LLC, plus two other financial institutions appointed by the Company at the time of any redemption or their affiliates which are primary U.S. Government securities dealers, and their respective successors; provided, however, that if any of the foregoing or their affiliates shall cease to be a primary U.S. Government securities dealer in the United States (a “Primary Treasury Dealer”), the Company shall substitute therefor another Primary Treasury Dealer.

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“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Quotation Agent, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Quotation Agent by the Reference Treasury Dealers at 3:30 p.m. New York time on the third Business Day preceding such redemption date.

“Treasury Rate” means, with respect to any redemption date, the rate per annum equal to the semiannual equivalent yield to maturity or interpolated maturity (on a day count basis) of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date.

Notice of any redemption by the Company will be mailed at least 30 days but not more than 60 days before any redemption date to each holder of Bonds of Series UUU to be redeemed. If less than all the Bonds of Series UUU are to be redeemed at the option of the Company, and if the Bonds of Series UUU are not Global Securities, the Trustee shall select, in such manner as it shall deem fair and appropriate, the Bonds of Series UUU to be redeemed in whole or in part.

Unless the Company defaults in payment of the redemption price, on and after any redemption date, interest will cease to accrue on the Bonds of Series UUU or portions thereof called for redemption.

In the case of any of certain events of default specified in the Indenture, the principal of this bond may be declared or may become due and payable prior to the stated date of maturity hereof in the manner and with the effect provided in the Indenture.

No recourse shall be had for the payment of the principal of or interest on this bond, or for any claim based hereon, or otherwise in respect hereof or of the Indenture, to or against any incorporator, shareholder, officer or director, past, present or future, of the Company or of any predecessor or successor company, either directly or through the Company or such predecessor or successor company, under any constitution or statute or rule of law, or by the enforcement of any assessment or penalty, or otherwise, all such liability of incorporators, shareholders, directors and officers being waived and released by the registered owner hereof by the acceptance of this bond and being likewise waived and released by the terms of the Indenture.

The Bonds of Series UUU are issuable only in registered form without coupons. This bond is transferable by the registered owner hereof, in person or by an attorney duly authorized, at the principal office or place of business of Deutsche Bank National Trust Company, the Trustee, or its successor in trust under the Indenture, or, if the Bonds of Series UUU are not Global Securities, at the option of the registered owner, at the office or agency of the Company in the Borough of Manhattan, the City of New York, State of New York, upon the surrender and cancellation of this bond, and upon any such transfer a

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new registered bond or bonds of the same series and maturity date and for the same aggregate principal amount will be issued to the transferee in exchange herefor.

The Bonds of Series UUU are issuable in denominations of $2,000 and multiples of $1,000 in excess thereof as shall from time to time be determined and authorized by the Board of Directors of the Company. In the manner and subject to the limitations provided in the Indenture, Bonds of Series UUU are exchangeable as between authorized denominations, upon presentation thereof for such purpose by the registered owner, at the principal office or place of business of Deutsche Bank National Trust Company, the Trustee, or its successor in trust under the Indenture, or, at the option of the registered owner, at the office or agency of the Company in the Borough of Manhattan, the City of New York, State of New York.

No service charge will be made for any transfer or exchange of this bond, but the Company may require a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

(FORM OF TRUSTEE’S CERTIFICATE)

TRUSTEE’S CERTIFICATE

This bond is one of the Bonds of Series UUU designated therein referred to and described in the within mentioned Indenture and Sixty-Fifth Supplemental Indenture.

DEUTSCHE BANK NATIONAL TRUST COMPANY, AS TRUSTEE
By
	Authorized Officer

[THE REMAINDER OF THIS PAGE HAS BEEN LEFT BLANK INTENTIONALLY.]

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Section 3.  Each Bond of Series UUU issued prior to the first interest payment date shall be dated as of March 15, 2012, and otherwise shall be dated as provided in Section 1 of Article II of the Indenture.

Section 4.  All Bonds of Series UUU shall be due and payable on March 15, 2042, and shall bear interest from the date thereof at the rate of 4.20% per annum, payable semi-annually on the fifteenth day of March and September in each year, commencing September 15, 2012.

Section 5.  Subject to agreements with or the rules of the Depository or any successor book-entry security system or similar system with respect to Global Securities, both the principal of and the interest on the Bonds of Series UUU shall be payable in any coin or currency of the United States of America which at the time of payment is legal tender for the payment of public and private debts, at the office or agency of the Company in Plainfield, Indiana, or, at the option of the holder thereof, at the office or agency of the Company in the Borough of Manhattan, the City of New York, State of New York, except that interest on the Bonds of Series UUU may be paid, at the option of the Company, by check or draft mailed to the address of the person entitled thereto as it appears on the books of the Company maintained for that purpose.

Section 6.  Definitive Bonds of Series UUU shall be issuable in denominations of $2,000 and multiples of $1,000 in excess thereof, numbered consecutively from “UUU-R-1” upward.

The Bonds of Series UUU shall be executed on behalf of the Company by the manual or facsimile signature of its President or an Executive Vice President or one of its Vice Presidents and shall have affixed thereto the seal of the Company or a facsimile thereof attested by the manual or facsimile signature of its Secretary or one of its Assistant Secretaries and shall be authenticated by the execution by the Trustee of the certificate endorsed on said bonds.

No service charge will be made by the Company for the transfer or for the exchange of Bonds of Series UUU except, in the case of transfer, a charge sufficient to reimburse the Company for any tax or other governmental charge payable in connection therewith.

Pursuant to the provisions of Section 11 of Article II of the Indenture, Bonds of Series UUU may be issued in temporary form, and if temporary bonds be issued, the Company shall, with all reasonable dispatch, at its own expense and without charge to the holders of the temporary bonds, prepare and execute definitive Bonds of Series UUU and exchange the temporary bonds for such definitive bonds in the manner provided for in said section, provided, however, no presentation or surrender of temporary Bonds of Series UUU shall be necessary in order for the holders entitled to interest thereon to receive such interest.

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Section 7.  Article IX of the Indenture, “Maintenance and Renewal Fund and Sinking Fund Provisions”, as heretofore amended or supplemented shall not apply to the “PSI Energy, Inc. First Mortgage Bonds, Series BBB, 8%, Due July 15, 2009” (such bonds being hereinafter referred to as the “Bonds of Series BBB”) or to any subsequently created series of bonds (which includes the Bonds of Series UUU) from and after the date on which no series of bonds created under the Indenture prior to the Bonds of Series BBB are outstanding.

Section 8.  Section 22 of Article V of the Indenture as heretofore amended or supplemented which, among other things, requires an inspection of the mortgaged property every two years by an independent engineer, shall not apply to the Bonds of Series BBB or to any subsequently created series of bonds (which includes the Bonds of Series UUU), from and after the date on which no series of bonds created under the Indenture prior to the Bonds of Series BBB are outstanding.

Section 9.  The Company reserves the right, without consent or other action by the holders of the Bonds of Series BBB or of any subsequently created series of bonds (which includes the Bonds of Series UUU), to amend the Indenture, as heretofore amended or supplemented, at any time after all bonds of any series created prior to the Bonds of Series BBB are no longer outstanding under the Indenture, as follows:

(a)  by substituting for the words “in principal amount not greater than sixty per centum (60%) of” in Section 3 of Article IV thereof the following:

“in principal amount not greater than sixty-six and two-thirds per centum (66-2/3%) of “.

(b)  by substituting for the words “shall exceed sixty per centum (60%) of the value of bondable property so acquired” in Section 9 of Article V thereof the following:

“shall exceed sixty-six and two-thirds per centum (66-2/3%) of the value of bondable property so acquired”.

(c)  by substituting for the words “shall be deemed to be paid within the meaning of this article; provided, that the date for the payment or redemption of such bonds shall be not more than one (1) year after such moneys shall have been so set apart or paid.” in the first paragraph of Article XIV thereof the following:

“shall be deemed to be paid within the meaning of this article.”.

(d)  by substituting for the words “with the consent of holders of at least seventy-five per centum (75%) in aggregate principal amount of the bonds

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at the time outstanding;” in sub-section (a) of Section 3 of Article XVIII thereof the following:

“with the consent of holders of at least sixty-six and two-thirds per centum (66-2/3%) in aggregate principal amount of the bonds at the time outstanding;”.

(e)  by substituting for the words “holders (or persons entitled to vote the bonds) of not less than seventy-five per centum (75%) in aggregate principal amount of the bonds entitled to be voted” in sub-section (l) of Section 3 of Article XVIII thereof the following:

“holders (or persons entitled to vote the bonds) of not less than sixty-six and two-thirds per centum (66-2/3%) in aggregate principal amount of the bonds entitled to be voted”.

(f)  by substituting for the words “holders (or persons entitled to vote the bonds) of at least seventy-five per centum (75%) in principal amount of the bonds outstanding” in sub-section (m) of Section 3 of Article XVIII thereof the following:

“holders (or persons entitled to vote the bonds) of at least sixty-six and two-thirds per centum (66-2/3%) in principal amount of the bonds outstanding”.

ARTICLE II.

ISSUANCE OF BONDS OF SERIES UUU.

Section 1.  An initial issue of Bonds of Series UUU, in the aggregate principal amount not exceeding two hundred fifty million dollars ($250,000,000), may be executed by the Company and delivered to the Trustee for authentication, and shall be authenticated and delivered by the Trustee to or upon the order of the Company (which authentication and delivery may be made without awaiting the filing or recording of this Sixty-Fifth Supplemental Indenture), upon receipt by the Trustee of the resolutions, certificates, orders, opinions and other instruments required by the provisions of Section 3 of Article IV of the Indenture to be received by the Trustee as a condition to the authentication and delivery by the Trustee of bonds pursuant to said Section 3.

Section 2.  Subject to the limitations provided in Section 24 of Article V of the Indenture, additional Bonds of Series UUU may be issued by the Company under the provisions of Sections 2, 3 or 4 of Article IV of the Indenture.

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ARTICLE III.

INDENTURE AMENDMENTS.

Section 1.  Article I of the Indenture, as heretofore amended, is hereby further amended (i) by adding immediately after subdivision “(104)” thereof an additional subdivision numbered “(105)” and reading as follows:

“(105) The term ‘Sixty-Fifth Supplemental Indenture’ shall mean the Sixty-Fifth Supplemental Indenture executed by the Company and the Trustee, dated as of March 15, 2012, supplementing and amending the Indenture; and the term ‘Bonds of Series UUU’ shall mean the ‘Duke Energy Indiana, Inc. First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042’ created by the Sixty-Fifth Supplemental Indenture.”

and (ii) by changing the numbering of the present subdivision “(105)” thereof to “(106)”.

Section 2.  Article VII of the Indenture, as heretofore amended, is hereby further amended by inserting therein immediately after Section 50 thereof, a new section designated “Section 51” and reading as follows:

“Section 51. At any time before September 15, 2041, the Bonds of Series UUU will be redeemable in whole or in part, at the option of the Company at any time, at a redemption price equal to the greater of (1) 100% of the principal amount of the Bonds of Series UUU to be redeemed and (2) the sum of the present values of the remaining scheduled payments of principal and interest thereon (exclusive of interest accrued to the redemption date), discounted to the redemption date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus 0.15% (15 basis points), plus, in each case, accrued interest to the redemption date. For the avoidance of doubt, interest that is due and payable on an interest payment date falling on or prior to a redemption date will be payable on such interest payment date in accordance with the Bonds of Series UUU and the Indenture.  The Company shall notify the Trustee of the redemption price with respect to any redemption pursuant to this paragraph promptly after the calculation thereof. The Trustee shall not be responsible for calculating said redemption price.

At any time on or after September 15, 2041, the Bonds of Series UUU will be redeemable in whole or in part, at the option of the Company at any time, at a redemption price equal to 100% of the principal amount of such Bonds of Series UUU to be redeemed plus accrued interest to the date of redemption.

‘Business Day’ means any day other than a day on which banks in New York City are required or authorized to be closed.

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‘Comparable Treasury Issue’ means the United States Treasury security selected by the Quotation Agent as having an actual or interpolated maturity comparable to the remaining term of the Bonds of Series UUU to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of a corporate debt securities of a comparable maturity to the remaining term of the Bonds of Series UUU.

‘Comparable Treasury Price’ means, with respect to any redemption date for the Bonds of Series UUU, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (B) if the Quotation Agent obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations.

‘Quotation Agent’ means one of the Reference Treasury Dealers appointed by the Company.

‘Reference Treasury Dealer’ means each of RBC Capital Markets, LLC, RBS Securities Inc. and UBS Securities LLC, plus two other financial institutions appointed by the Company at the time of any redemption or their affiliates which are primary U.S. Government securities dealers, and their respective successors; provided, however, that if any of the foregoing or their affiliates shall cease to be a primary U.S. Government securities dealer in the United States (a “Primary Treasury Dealer”), the Company shall substitute therefor another Primary Treasury Dealer.

‘Reference Treasury Dealer Quotations’ means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Quotation Agent, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Quotation Agent by the Reference Treasury Dealers at 3:30 p.m., New York time, on the third Business Day preceding such redemption date.

‘Treasury Rate’ means, with respect to any redemption date, the rate per annum equal to the semiannual equivalent yield to maturity or interpolated maturity (on a day count basis) of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date.

Notice of any redemption by the Company will be mailed at least 30 days but not more than 60 days before any redemption date to each holder of Bonds of Series UUU to be redeemed.  If less than all the Bonds of Series UUU are to be redeemed at the option of the Company, and if the Bonds of Series UUU are not Global Securities, the Trustee shall select, in such manner as it shall deem fair and appropriate, the Bonds of Series UUU to be redeemed in whole or in part.

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Unless the Company defaults in payment of the redemption price, on and after any redemption date, interest will cease to accrue on the Bonds of Series UUU or portions thereof called for redemption.

The Company shall indemnify and hold harmless the Trustee from any and all losses, costs, damages, expenses, fees (including attorneys’ fees), court costs, judgments, penalties, obligations, suits, disbursements and liabilities of any kind or character whatsoever which may at any time be imposed upon, incurred by or asserted against the Trustee by reason of or arising out of or caused, directly or indirectly by any act or omission of the Trustee with respect to this Section 51, except for such that would arise out of the willful misconduct or gross negligence of the Trustee and except for costs and expenses arising in the ordinary course of the Trustee’s business.”

Section 3.  The Bonds of Series UUU shall not be entitled to the benefit of a sinking fund.

ARTICLE IV.

CONCERNING THE TRUSTEE.

The Trustee hereby accepts the trusts hereby declared and agrees to perform the same upon the terms and conditions in the Indenture and in this Sixty-Fifth Supplemental Indenture set forth.  The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Sixty-Fifth Supplemental Indenture or the due execution hereof by the Company or for or in respect of the recitals contained herein, all of which recitals are made by the Company solely. In general, each and every term and condition contained in Article XVII of the Indenture shall apply to this Sixty-Fifth Supplemental Indenture.

ARTICLE V.

MISCELLANEOUS PROVISIONS.

Section 1. Wherever in the original Indenture or in any of the sixty-five supplemental indentures thereto reference is made to any article or section of the original Indenture, such reference shall be deemed to refer to such article or section as amended by such supplemental indentures.

Section 2.  Upon the execution and delivery hereof, the Indenture shall thereupon be deemed to be amended as hereinabove set forth as fully and with the same effect as if the amendments made hereby were set forth in the original Indenture and each of the sixty-five supplemental indentures to the Indenture shall henceforth be read, taken and construed as one and the same instrument; but such amendments shall not operate so as to

20

render invalid or improper any action heretofore taken under the original Indenture or said supplemental indentures.

Section 3. All the covenants, stipulations and agreements in this Sixty-Fifth Supplemental Indenture contained are and shall be for the sole and exclusive benefit of the parties hereto, their successors and assigns, and of the holders from time to time of the bonds.

Section 4.  The table of contents to, and the headings of the different articles of, this Sixty-Fifth Supplemental Indenture are inserted for convenience of reference, and are not to be taken to be any part of the provisions hereof, nor to control or affect the meaning, construction or effect of the same.

Section 5.  This Sixty-Fifth Supplemental Indenture may be simultaneously executed in any number of counterparts, and all such counterparts shall constitute but one and the same instrument.

Section 6.  Whenever a payment of principal or interest in respect of the Bonds of Series UUU are due on any day other than a business day (as hereinafter defined), such payment shall be payable on the first business day next following such date, and, in the case of a principal payment, interest on such principal payment shall accrue to the date of such principal payment. For the purposes of this Section 6 the term business day shall mean any day other than a day on which the Trustee is authorized by law to close.

[THE REMAINDER OF THIS PAGE HAS BEEN LEFT BLANK INTENTIONALLY.]

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IN WITNESS WHEREOF, said Duke Energy Indiana, Inc. has caused this instrument to be executed in its corporate name by its President or one of its Vice Presidents and to be attested by its Secretary or one of its Assistant Secretaries and said Deutsche Bank National Trust Company has caused this instrument to be executed in its corporate name by one of its Vice Presidents and to be attested by one of its Vice Presidents, in several counterparts, all as of the day and year first above written.

	DUKE ENERGY INDIANA, INC.
(CORPORATE SEAL)	By	/S/ DAVID S. MALTZ
		David S. Maltz
		Vice President
ATTEST:
/S/ RICHARD G. BEACH
Richard G. Beach, Assistant Secretary

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	DEUTSCHE BANK NATIONAL TRUST COMPANY, solely as Trustee and not in its individual capacity
(CORPORATE SEAL)	By	/S/	VICTORIA Y. DOUYON
			Victoria Y. Douyon
			Vice President
ATTEST:
/S/ KATHERINE COKIC
Katherine Cokic, Vice President

23

STATE OF NORTH CAROLINA	)
	) ss:
COUNTY OF MECKLENBURG	)

BE IT REMEMBERED, that on this 15th day of March, 2012, before me, the undersigned, a notary public in and for the County and State aforesaid, duly commissioned and qualified, personally appeared David S. Maltz and Richard G. Beach, personally known to me to be the same persons whose names are subscribed to the foregoing instrument, and personally known to me to be a Vice President and an Assistant Secretary, respectively, of Duke Energy Indiana, Inc., an Indiana corporation, and acknowledged that they signed and delivered said instrument as their free and voluntary act as such Vice President and Assistant Secretary, respectively, and as the free and voluntary act of said Duke Energy Indiana, Inc., for the uses and purposes therein set forth; in pursuance of the power and authority granted to them by resolution of the Board of Directors of said Company.

IN WITNESS WHEREOF, I have hereunto set my hand and affixed my notarial seal the day and year aforesaid.

(NOTARIAL SEAL)

/S/ PATRICIA C. ROSS

Patricia C. Ross, Notary Public

Commission expires: 10/17/2014

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STATE OF ILLINOIS	)
	) ss:
COUNTY OF COOK	)

BE IT REMEMBERED, that on this 13th day of March, 2012, before me, the undersigned, a notary public in and for the County and State aforesaid, duly commissioned and qualified, personally appeared Victoria Y. Douyon and Katherine Cokic personally known to me to be the same persons whose names are subscribed to the foregoing instrument, and personally known to me to be Vice Presidents of Deutsche Bank National Trust Company, a national banking association, and acknowledged that they signed and delivered said instrument as their free and voluntary act as such Vice Presidents, respectively, and as the free and voluntary act of said Deutsche Bank National Trust Company, for the uses and purposes therein set forth; in pursuance of the power and authority granted to them by the bylaws of said association.

IN WITNESS WHEREOF, I have hereunto set my hand and affixed my notarial seal the day and year aforesaid.

(NOTARIAL SEAL)

/S/ MARY E. POTTER
	Notary Public

This instrument was prepared by:

Bradley C. Arnett, Esq.*

Taft Stettinius & Hollister LLP

425 Walnut Street, Suite 1800

Cincinnati, Ohio  45202-3957

*Admitted in Ohio; not admitted in Indiana

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EX-5.1

Exhibit 5.1

Taft Stettinius & Hollister LLP

425 Walnut Street, Suite 1800 / Cincinnati, OH 45202-3957 / Tel: 513.381.2838 / Fax: 513.381.0205 / www.taftlaw.com

Cincinnati / Cleveland / Columbus / Dayton / Indianapolis / Northern Kentucky / Phoenix / Beijing

March 15, 2012

Duke Energy Indiana, Inc.

1000 East Main Street

Plainfield, Indiana 46168

Ladies and Gentlemen:

We have acted as counsel to Duke Energy Indiana, Inc., an Indiana corporation (the “Company”), in connection with the public offering of $250,000,000 aggregate principal amount of the Company’s First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042 (the “Bonds”), issuable pursuant to an Indenture of Mortgage or Deed of Trust, dated September 1, 1939 (the “Original Indenture”), between the Company and Deutsche Bank National Trust Company, as Trustee (the “Trustee”), as amended and supplemented from time to time, including by the Sixty-Fifth Supplemental Indenture, dated as of March 15, 2012 (the “Supplemental Indenture”) (the Original Indenture, as so amended and supplemented, being hereinafter called the “First Mortgage Indenture”).  On March 12, 2012, the Company entered into an Underwriting Agreement (the “Underwriting Agreement”) with RBC Capital Markets, LLC, RBS Securities Inc. and UBS Securities LLC, as representatives of the several underwriters named therein (the “Underwriters”), relating to the sale by the Company to the Underwriters of the Bonds.

In connection with the rendering of this opinion, we have examined and relied, as to factual matters, upon originals, or copies certified or otherwise identified to our satisfaction, of such documents, corporate records, statements of public officials and Company officers and directors, and such other instruments, and have made such investigations of law, as we have deemed relevant and necessary as a basis for this opinion, including, without limitation, the following documents:

(a)the registration statement on Form S-3 (File No. 333-169633-02) of the Company filed on September 29, 2010, with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “1933 Act”), allowing for delayed offerings pursuant to Rule 415 under the 1933 Act, the information deemed to be a part of such registration statement as of the date hereof pursuant to Rule 430B of the rules and regulations under the 1933 Act (the “1933 Act Regulations”) and the information incorporated or deemed to be incorporated by reference in such registration statement pursuant to Item 12 of Form S-3 under the 1933 Act (such registration statement being hereinafter referred to as the “Registration Statement”);

(b)the prospectus, dated September 29, 2010, including the information incorporated or deemed to be incorporated by reference therein (the “Base Prospectus”), which forms a part of and is included in the Registration Statement

in the form filed with the Commission pursuant to Rule 424(b) of the 1933 Act Regulations;

(c)the preliminary prospectus supplement, dated March 12, 2012, including the information incorporated or deemed to be incorporated by reference therein (the “Preliminary Prospectus Supplement”), relating to the offering of the Bonds in the form filed with the Commission pursuant to Rule 424(b) of the 1933 Act Regulations;

(d)the prospectus supplement, dated March 12, 2012 (the “Prospectus Supplement”), relating to the offering of the Bonds in the form filed with the Commission pursuant to Rule 424(b) of the 1933 Act Regulations (the Prospectus Supplement, together with the Base Prospectus, are collectively referred to herein as the “Prospectus”);

(e)the Issuer Free Writing Prospectus issued at or prior to the Applicable Time, attached as Schedule C to the Underwriting Agreement and filed with the Commission pursuant to Rule 433(d) of the 1933 Act Regulations and Section 5(e) of the Underwriting Agreement (the Base Prospectus, the Preliminary Prospectus and the Free Writing Prospectus are collectively referred to herein as the “Pricing Disclosure Package”);

(f)an executed copy of the Underwriting Agreement;

(g)an executed copy of the First Mortgage Indenture;

(h)an executed copy of the Supplemental Indenture;

(i)a specimen of the Bonds;

(j)the Amended Articles of Consolidation of the Company, effective October 1, 2006;

(k)the By-Laws of the Company, as amended on July 23, 2003;

(l)the Company’s minute books, including an Action by Written Consent of the Board of Directors of the Company, effective September 22, 2010, relating to the preparation and filing with the Commission of the Registration Statement and the issuance of the Company’s securities, and a Written Consent of the Assistant Treasurer of the Company, effective March 12, 2012, establishing the terms of the Bonds pursuant to authority granted in the aforementioned Action of the Board of Directors;

(m)the Order entered on December 29, 2010 by the Indiana Utility Regulatory Commission in Cause No. 43951 wherein, among other things, the Company secured the necessary authorizations and approvals of said Commission in respect of the issuance of the Bonds;

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(n)a Certificate of Assistant Secretary of the Company, dated March 15, 2012, with respect to signatures and incumbency of officers of the Company, and other corporate matters; and

(o)an Officers’ Certificate of the Company, dated March 15, 2012, pursuant to Section 6(i) of the Underwriting Agreement.

We have discussed with representatives of the Company such questions of fact as we have deemed necessary or appropriate for the purpose of this opinion, and have relied upon certificates of officers of the Company with respect to the accuracy of such factual matters as well as the factual matters contained in the representations and warranties of the Company that are contained in the Underwriting Agreement.

For purposes of this opinion, we have assumed, other than as to the Company, (i) the due authorization, execution and delivery of each of the Underwriting Agreement and the First Mortgage Indenture and (ii) that each of the Underwriting Agreement and the First Mortgage Indenture constitutes the legal, valid and binding obligation of all respective parties to each of the Underwriting Agreement and the First Mortgage Indenture under applicable law, enforceable against all such parties in accordance with its terms. Further, we have assumed the authenticity of all documents submitted to us as originals, the legal capacity of all parties signing such documents, the genuineness of the signatures on such documents, and the conformity to original documents of all photostatic copies of such documents submitted to us.

The opinions expressed herein are limited to the laws (excluding principles of conflicts of law) of the State of Indiana and the laws of the United States of America. In rendering such opinions, we have made such examination of Indiana law and federal laws as we have deemed relevant for the purposes hereof, but we have not made an independent review of the laws of any jurisdiction other than the State of Indiana and the United States of America. Accordingly, we express no opinions as to the laws of any jurisdiction other than the State of Indiana and the laws of the United States of America.

Based upon the foregoing, and subject to the assumptions, qualifications and limitations set forth herein, we are of the opinion that the Bonds have been duly authorized, and when duly executed by the Company, authenticated by the Trustee and delivered to and paid for by the Underwriters pursuant to the Underwriting Agreement, will be valid and binding obligations of the Company enforceable in accordance with their terms.

The above opinion with regard to the enforceability of the Bonds is qualified by the effects of bankruptcy, insolvency, reorganization, moratorium or similar laws relating to or affecting creditors’ rights generally and general principles of equity (regardless of whether such principles are considered in a proceeding in equity or at law).

This opinion is rendered as of the date hereof based upon the facts and law in existence on the date hereof. We assume no obligation to update or supplement this letter to reflect any circumstances which may hereafter come to our attention with respect to the opinion and statements set forth above, including any changes in applicable law which may hereafter occur.

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We hereby consent to the filing of this letter as an exhibit to the Current Report on Form 8-K filed by the Company in connection with the issuance and sale of the Bonds, incorporated by reference in the Registration Statement. In giving such consent, we do not thereby concede that we are within the category of persons whose consent is required under Section 7 of the 1933 Act or the 1933 Act Regulations.

Very truly yours,

/s/ TAFT STETTINIUS & HOLLISTER LLP

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EX-99.1

Exhibit 99.1

DUKE ENERGY INDIANA, INC.

$250,000,000 FIRST MORTGAGE BONDS,

SERIES UUU, 4.20%, DUE MARCH 15, 2042

UNDERWRITING AGREEMENT

March 12, 2012

RBC Capital Markets, LLC

200 Vesey Street

New York, New York 10281

RBS Securities Inc.

600 Washington Boulevard

Stamford, Connecticut  06901

UBS Securities LLC

677 Washington Boulevard

Stamford, Connecticut  06901

As Representatives of the several Underwriters

c/o UBS Securities LLC

677 Washington Boulevard

Stamford, Connecticut  06901

Ladies and Gentlemen:

1.Introductory. DUKE ENERGY INDIANA, INC., an Indiana corporation (the “Company”), proposes, subject to the terms and conditions stated herein, to issue and sell  $250,000,000 aggregate principal amount of First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042 (the “Bonds”).  The Bonds will be issued under and secured by an Indenture of Mortgage or Deed of Trust, dated September 1, 1939 (the “Original Mortgage”), between the Company and Deutsche Bank National Trust Company, as successor trustee (the “Trustee”), as supplemented and amended from time to time, including by the Sixty-Fifth Supplemental Indenture, to be dated as of March 15, 2012 (the “Sixty-Fifth Supplemental Indenture” and together with the Original Mortgage (as supplemented and amended) the “First Mortgage Indenture”).  RBC Capital Markets, LLC, RBS Securities Inc. and UBS Securities LLC (the “Representatives”) are acting as representatives of the several underwriters named on Schedule A hereto (together with the Representatives, the “Underwriters”).

2.Representations and Warranties of the Company. As of the date hereof, as of the Applicable Time (as defined below) and as of the Closing Date, the Company represents and warrants to, and agrees with, the several Underwriters that:

(a)A registration statement (No. 333-169633-02), including a prospectus, relating to the Bonds and certain other securities has been filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “1933 Act”); such registration statement and any post-effective amendment thereto, each in the form heretofore delivered to you, became effective upon filing with the Commission pursuant to Rule 462 of the rules and regulations of the Commission under the 1933 Act (the “1933 Act Regulations”).  The base prospectus filed as part of such registration statement, as amended and supplemented immediately prior to the Applicable Time, is hereinafter called the “Base Prospectus”; the preliminary prospectus supplement specifically relating to the Bonds immediately prior to the Applicable Time filed with the Commission pursuant to Rule 424(b) of the 1933 Act Regulations is hereinafter called the “Preliminary Prospectus”; the various parts of such registration statement, including all exhibits thereto and including the prospectus supplement relating to the Bonds that is filed with the Commission and deemed by virtue of Rule 430B of the 1933 Act Regulations to be part of such registration statement, each as amended at the time such part of the registration statement became effective, are hereinafter collectively called the “Registration Statement”; the form of the final prospectus relating to the Bonds filed with the Commission pursuant to Rule 424(b) of the 1933 Act Regulations in accordance with Section 5(a) hereof is hereinafter called the “Prospectus” and any information included in such Prospectus that was omitted from the Registration Statement at the time it became effective but that is deemed to be a part of and included in the Registration Statement pursuant to Rule 430B is referred to as “Rule 430B Information”; any reference herein to the Base Prospectus, the Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the 1933 Act, as of the date of such prospectus; any reference to any amendment or supplement to the Base Prospectus, the Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any post-effective amendment to the Registration Statement, the prospectus supplement relating to the Bonds filed with the Commission pursuant to Rule 424(b) under the 1933 Act and any documents filed under the Securities Exchange Act of 1934, as amended (the “1934 Act”), and incorporated therein, in each case after the date of the Base Prospectus, the Preliminary Prospectus or the Prospectus, as the case may be; any reference to any amendment to the Registration Statement shall be deemed to include any annual report of the Company filed pursuant to Section 13(a) or 15(d) of the 1934 Act after the effective date of the Registration Statement that is incorporated by reference in the Registration Statement.  For purposes of this Agreement, the term “Applicable Time” means 1:25 p.m. (New York City Time) on the date hereof.

(b)No stop order suspending the effectiveness of the Registration Statement has been issued and no proceeding for that purpose or pursuant to Section 8A of the 1933 Act has been initiated or threatened by the Commission.

(c)The Registration Statement, the Base Prospectus, the document or documents specified in Item 3 of Schedule B hereto (such document or documents, the

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“Permitted Free Writing Prospectus”), the Preliminary Prospectus and the Prospectus conform or will conform, and any amendments or supplements thereto will conform, in all material respects to the requirements of the 1933 Act and the 1933 Act Regulations; the Registration Statement as of its original effective date, at each deemed effective date with respect to the Underwriters pursuant to Rule 430B(f)(2) of the 1933 Act Regulations and at the Closing Date (as defined in Section 3), did not and will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading; the Prospectus and any amendment or supplement thereto, at the time the Prospectus or any such amendment or supplement is issued and at the Closing Date, will not 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; and the Base Prospectus, the Preliminary Prospectus and the Permitted Free Writing Prospectus (collectively, the “Pricing Disclosure Package”), all considered together, as of the Applicable Time, did not 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; provided, however, the Company makes no representation or warranty to the Underwriters with respect to any statements or omissions made in reliance upon and in conformity with written information furnished to the Company by the Representatives on behalf of the Underwriters specifically for use in the Registration Statement, the Prospectus, the Preliminary Prospectus or the Permitted Free Writing Prospectus.

(d)The Permitted Free Writing Prospectus specified on Schedule B hereto as of its issue date and at all subsequent times through the completion of the public offer and sale of the Bonds (or until any earlier date that the Company notifies the Underwriters as described in Section 5(f)) did not and will not include any information that conflicts with the information contained in the Registration Statement, the Base Prospectus, the Preliminary Prospectus or the Prospectus that has not been superseded or modified.

(e)At the earliest time the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) of the 1933 Act Regulations) of the Bonds, the Company was not an “ineligible issuer” as defined in Rule 405 of the 1933 Act Regulations.  The Company is, and was at the time of the initial filing of the Registration Statement, eligible to use Form S-3 under the 1933 Act.

(f)The documents and interactive data in eXtensible Business Reporting Language (“XBRL”) incorporated or deemed to be incorporated by reference in the Registration Statement, the Pricing Disclosure Package and the Prospectus, at the time they were filed or hereafter are filed with the Commission, complied or will comply, as the case may be, in all material respects with the requirements of the 1934 Act and the rules and regulations of the Commission thereunder (the “1934 Act Regulations”) and, when read together with the other information in the Prospectus, (a) at the time the Registration Statement became effective, (b) at the

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Applicable Time and (c) on the Closing Date, did not and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(g)The Company’s most recent Annual Report on Form 10-K meets the conditions specified in General Instruction I(1) of the General Instructions for Form 10-K, and any Quarterly Report filed on Form 10-Q by the Company after the filing of the Company’s most recent Annual Report on Form 10-K meets the conditions specified in General Instruction H(1) of the General Instructions for Form 10-Q.

(h)The compliance by the Company with all of the provisions of this Agreement has been duly authorized by all necessary corporate action and the consummation of the transactions herein contemplated will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or its subsidiary is a party or by which either is bound or to which any of their respective properties or assets are subject that would have a material adverse effect on the business, financial condition or results of operations of the Company and its subsidiary, taken as a whole; nor will such compliance result in any violation of the provisions of the Company’s Amended Articles of Consolidation (“Articles”) or the Company’s By-Laws (“By-Laws”) or any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or its subsidiary or any of their respective properties that would have a material adverse effect on the business, financial condition or results of operations of the Company and its subsidiary, taken as a whole.  No consent, approval, authorization, order, registration or qualification of or with any such court or governmental agency or body is required for the consummation by the Company of the transactions contemplated by this Agreement, except for authorization by the Indiana Utility Regulatory Commission (“IURC”), registration of the offer and sale of the Bonds under the 1933 Act, qualification of the First Mortgage Indenture under the Trust Indenture Act of 1939 (the “1939 Act”) and such consents, approvals, authorizations, registrations or qualifications as may be required under state securities or Blue Sky laws in connection with the purchase and distribution of the Bonds by the Underwriters.

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

(j)The Original Mortgage has been duly authorized, executed and delivered by the Company and duly qualified under the 1939 Act.  The Sixty-Fifth Supplemental Indenture has been duly authorized by the Company and, when executed and delivered by the Company (assuming the due authorization, execution and delivery thereof by the Trustee), the First Mortgage Indenture will constitute a valid and legally binding instrument of the Company, enforceable against the Company in accordance with its terms, except as (i) the enforceability thereof

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may be limited by bankruptcy, insolvency, or similar laws affecting creditors’ rights generally, and (ii) the rights of acceleration and the availability of equitable remedies may be limited by equitable principles of general applicability.

(k)The Bonds have been duly authorized by the Company and when executed by the Company, authenticated by the Trustee (in the manner provided in the First Mortgage Indenture) and delivered against payment therefor will constitute valid and legally binding obligations of the Company, enforceable against the Company in accordance with their terms, except as (i) the enforceability thereof may be limited by bankruptcy, insolvency, or similar laws affecting creditors’ rights generally, and (ii) the rights of acceleration and the availability of equitable remedies may be limited by equitable principles of general applicability.

(l)The Company (i) is a corporation duly incorporated and validly existing in good standing under the laws of the State of Indiana and (ii) is duly qualified to do business in each jurisdiction where the failure to be so qualified would materially adversely affect the ability of the Company to perform its obligations under this Agreement, the First Mortgage Indenture or the Bonds.

3.Purchase, Sale and Delivery of Bonds. On the basis of the representations, warranties and agreements herein contained, but subject to the terms and conditions herein set forth, the Company agrees to sell to the Underwriters, and the Underwriters agree, severally and not jointly, to purchase from the Company, at a purchase price of 98.939% of the principal amount of the Bonds plus accrued interest from March 15, 2012, the respective principal amount of Bonds set forth opposite the name of each Underwriter on Schedule A hereto plus the respective principal amount of additional Bonds which each such Underwriter may become obligated to purchase pursuant to the provisions of Section 8 hereof.  The Underwriters hereby also agree to make a payment to the Company in an aggregate amount equal to $312,500, including in respect of expenses incurred by the Company in connection with the offering of the Bonds.

Payment of the purchase price for the Bonds to be purchased by the Underwriters and the payment referred to above shall be made at the offices of Taft Stettinius & Hollister LLP, 425 Walnut Street, Suite 1800, Cincinnati, Ohio 45202, or at such other place as shall be mutually agreed upon by the Representatives and the Company, at 10:00  a.m., New York City time, on March 15, 2012, or such other time and date as shall be mutually agreed upon in writing by the Representatives and the Company (the “Closing Date”).  All other documents referred to herein that are to be delivered at the Closing Date shall be delivered at that time at the offices of Sidley Austin LLP, 787 Seventh Avenue, New York, NY 10019.  Payment shall be made to the Company by wire transfer of immediately available funds to a bank account designated by the Company, against delivery of the Bonds, in fully registered form, to the Representatives for the respective accounts of the Underwriters.  The Bonds shall be delivered in the form of one or more global certificates in aggregate denomination equal to the aggregate principal amount of Bonds upon original issuance, and registered in the name of Cede & Co., as nominee for The Depository Trust Company (“DTC”).

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4.Offering by the Underwriters. It is understood that the several Underwriters propose to offer the Bonds for sale to the public as set forth in the Pricing Disclosure Package and the Prospectus.

5.Covenants of the Company. The Company covenants and agrees with the several Underwriters that:

(a)The Company will cause the Preliminary Prospectus and the Prospectus to be filed pursuant to and in compliance with Rule 424(b) of the 1933 Act Regulations; the Company will advise the Underwriters promptly of (x) the filing of any amendment or supplement to the Registration Statement, the Base Prospectus, the Preliminary Prospectus or the Prospectus, and (y) the institution by the Commission of any stop order proceedings in respect of the Registration Statement.  The Company will use its best efforts to prevent the issuance of any such stop order and to obtain as soon as possible its lifting, if issued.

(b)If at any time when a prospectus relating to the Bonds (or the notice referred to in Rule 173(a) of the 1933 Act Regulations) is required to be delivered under the 1933 Act any event occurs as a result of which the Pricing Disclosure Package or the Prospectus as then amended or supplemented would include an 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 is necessary at any time to amend the Pricing Disclosure Package or the Prospectus to comply with the 1933 Act, the Company promptly will prepare and file with the Commission an amendment, a supplement or an appropriate document pursuant to Section 13 or 14 of the 1934 Act which will correct such statement or omission or which will effect such compliance.

(c)The Company, during the period when a prospectus relating to the Bonds is required to be delivered under the 1933 Act, will timely file all documents required to be filed with the Commission pursuant to Section 13 or 14 of the 1934 Act.

(d)Without the prior consent of the Underwriters, the Company has not made and will not make any offer relating to the Bonds that would constitute a “free writing prospectus” as defined in Rule 405 of the 1933 Act Regulations, other than the Permitted Free Writing Prospectus; each Underwriter, severally and not jointly, represents and agrees that, without the prior consent of the Company, it has not made and will not make any offer relating to the Bonds that would constitute a “free writing prospectus” as defined in Rule 405 of the 1933 Act Regulations, other than a Permitted Free Writing Prospectus or a free writing prospectus that is not required to be filed by the Company pursuant to Rule 433 of the 1933 Act Regulations (“Rule 433”); any such free writing prospectus (which shall include the pricing term sheet discussed in Section 5(e) below), the use of which has been consented to by the Company and the Underwriters, is specified in Item 3 of Schedule B hereto.  The Company represents that it has treated and agrees that it will treat each Permitted Free Writing Prospectus as an “issuer free writing

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prospectus,” as defined in Rule 433, and has complied and will comply with the requirements of Rule 433 applicable to any Permitted Free Writing Prospectus, including timely filing with the Commission where required, legending and record keeping.

(e)The Company agrees to prepare a pricing term sheet specifying the terms of the Bonds not contained in the Preliminary Prospectus, substantially in the form of Schedule C hereto and approved by the Representatives on behalf of the Underwriters, and to file such pricing term sheet as an “issuer free writing prospectus” pursuant to Rule 433 prior to the close of business two business days after the date hereof.

(f)The Company agrees that if at any time following the issuance of a Permitted Free Writing Prospectus any event occurs as a result of which such Permitted Free Writing Prospectus would conflict with the information (not superseded or modified) in the Registration Statement, the Pricing Disclosure Package or the Prospectus or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in light of the circumstances then prevailing, not misleading, the Company will give prompt notice thereof to the Underwriters and, if requested by the Underwriters, will prepare and furnish without charge to each Underwriter a free writing prospectus or other document, the use of which has been consented to by the Underwriters, which will correct such conflict, statement or omission; provided, however, that this covenant shall not apply to any statements or omissions made in reliance upon and in conformity with written information furnished to the Company by the Representatives on behalf of the Underwriters specifically for use in the Registration Statement, the Pricing Disclosure Package or the Prospectus.

(g)The Company will timely make generally available to its securityholders as soon as practicable an earnings statement for the purposes of the last paragraph of Section 11(a) of the 1933 Act.

(h)The Company will furnish to you, without charge, copies of the Registration Statement (three of which will include all exhibits other than those incorporated by reference), the Pricing Disclosure Package and the Prospectus, and all amendments and supplements to such documents, in each case as soon as available and in such quantities as you reasonably request.

(i)The Company will arrange or cooperate in arrangements for the qualification of the Bonds for sale under the laws of such jurisdictions as you designate and will continue such qualifications in effect so long as required for the distribution; provided, however, that the Company shall not be required to qualify as a foreign corporation or to file any general consent to service of process under the laws of any state where it is not now so subject.

(j)The Company will pay all expenses incident to the performance of its obligations under this Agreement including (i) the printing and filing of the Registration

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Statement and the printing of this Agreement and any Blue Sky Survey, (ii) the preparation and printing of certificates for the Bonds, (iii) the issuance and delivery of the Bonds as specified herein, (iv) the fees and disbursements of counsel for the Underwriters in connection with the qualification of the Bonds under the securities laws of any jurisdiction in accordance with the provisions of Section 5(i) and in connection with the preparation of the Blue Sky Survey (such fees not to exceed $5,000), (v) the printing and delivery to the Underwriters, in quantities as hereinabove referred to, of copies of the Registration Statement and any amendments thereto, of the Preliminary Prospectus, of the Prospectus, of any Permitted Free Writing Prospectus and any amendments or supplements thereto, (vi) any fees charged by independent rating agencies for rating the Bonds, (vii) any fees and expenses in connection with the listing of the Bonds on the New York Stock Exchange, (viii) any filing fee required by the Financial Industry Regulatory Authority, (ix) the costs of any depository arrangements for the Bonds with DTC or any successor depositary and (x) the costs and expenses of the Company relating to investor presentations on any “road show” undertaken in connection with the marketing of the offering of the Bonds, including, without limitation, 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 with the prior approval of the Company, travel and lodging expenses of the Underwriters and officers of the Company and any such consultants, and the cost of any aircraft chartered in connection with the road show; provided, however, the Underwriters shall reimburse a portion of the costs and expenses referred to in this clause (x).

6.Conditions of the Obligations of the Underwriters. The obligations of the several Underwriters to purchase and pay for the Bonds will be subject to the accuracy of the representations and warranties on the part of the Company herein, to the accuracy of the statements of officers of the Company made pursuant to the provisions hereof, to the performance by the Company of its obligations hereunder and to the following additional conditions precedent:

(a)The Prospectus shall have been filed by the Company with the Commission pursuant to Rule 424(b) within the applicable time period prescribed for such filing by the 1933 Act Regulations, and each Permitted Free Writing Prospectus shall have been filed by the Company with the Commission pursuant to Rule 433 within the applicable time period prescribed for such filing by the 1933 Act Regulations (to the extent so required).

(b)On or after the Applicable Time and prior to the Closing Date, no stop order suspending the effectiveness of the Registration Statement shall have been issued and no proceedings for that purpose or pursuant to Section 8A of the 1933 Act shall have been instituted or, to the knowledge of the Company or you, shall be threatened by the Commission.

(c)On or after the Applicable Time and prior to the Closing Date, the rating assigned by Moody’s Investors Service, Inc. or Standard & Poor’s Ratings Services (or any

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of their successors) to any debt securities or preferred stock of the Company as of the date of this Agreement shall not have been lowered.

(d)Since the respective most recent dates as of which information is given in the Pricing Disclosure Package and the Prospectus and up to the Closing Date, there shall not have been any material adverse change in the condition of the Company and its subsidiary, taken as a whole, financial or otherwise, except as reflected in or contemplated by the Pricing Disclosure Package and the Prospectus, and since such dates and up to the Closing Date, there shall not have been any material transaction entered into by the Company other than transactions contemplated by the Pricing Disclosure Package and the Prospectus and transactions in the ordinary course of business, the effect of which in your reasonable judgment is so material and adverse as to make it impracticable or inadvisable to proceed with the public offering or the delivery of the Bonds on the terms and in the manner contemplated by the Pricing Disclosure Package and the Prospectus.

(e)You shall have received an opinion of Kelley A. Karn, Esq., Deputy General Counsel of Duke Energy Business Services LLC, the service company affiliate of the Company, dated the Closing Date, to the effect that:

(i)The Company is a corporation duly organized and validly existing in good standing under the laws of the State of Indiana, with power and authority (corporate and other) to own its properties and conduct its business as described in the Pricing Disclosure Package and the Prospectus and to enter into and perform its obligations under this Agreement.

(ii)The Company’s sole subsidiary is a corporation duly organized and validly existing in good standing under the laws of Indiana and has due corporate and governmental authority to carry on the business in which it is engaged, except where the failure would not, singularly or in the aggregate, reasonably be expected to have a material adverse effect on the consolidated financial position, stockholder’s equity, results of operations, business or prospects of the Company and its subsidiary, taken as a whole, and to own and operate the properties in use in such business.

(iii)The execution, delivery and performance of this Agreement, the First Mortgage Indenture and the Bonds and compliance by the Company with its obligations hereunder and thereunder (x) will not conflict with, or result in any charge or encumbrance upon any of the assets of the Company (other than pursuant to the First Mortgage Indenture) pursuant to the terms of, or constitute a default under, any agreement, indenture or instrument known to such counsel, or result in a violation of the Articles or By-Laws of the Company (as in effect on the Closing Date) or any order, rule or regulation (also as in effect on the Closing Date) of any court or governmental agency having jurisdiction over the Company and (y) the issuance of the Bonds in accordance with the First Mortgage Indenture and the sale of the Bonds in accordance with this Agreement, do not and

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will not result in any violation by the Company of any of the terms or provisions of the Articles or By-Laws, or of the First Mortgage Indenture, or any mortgage or other agreement or instrument known to such counsel by which the Company is bound.

(iv)The First Mortgage Indenture is in due and proper form, has been duly and validly authorized by all necessary corporate action, has been duly executed and delivered by the Company, qualified under the 1939 Act, and, assuming due authorization, execution and delivery by the Trustee, the First Mortgage Indenture is a valid and binding instrument of the Company, enforceable in accordance with its terms, except as (i) the enforceability thereof may be limited by bankruptcy, insolvency, or similar laws affecting creditors’ rights generally, and (ii) the rights of acceleration and the availability of equitable remedies may be limited by equitable principles of general applicability.

(v)The issue of the Bonds by the Company in accordance with the terms of the First Mortgage Indenture has been duly authorized by all necessary corporate action; when duly executed by the Company, authenticated by the Trustee and delivered to and paid for by the Underwriters pursuant to this Agreement, the Bonds will constitute the legal, valid and binding obligations of the Company enforceable in accordance with their terms, secured by the lien of and entitled to the benefits provided by the First Mortgage Indenture, except as (i) the enforceability thereof may be limited by bankruptcy, insolvency, or similar laws affecting creditors’ rights generally, and (ii) the rights of acceleration and the availability of equitable remedies may be limited by equitable principles of general applicability.

(vi)The Company has good and marketable title to the properties, rights and assets described in and conveyed by the First Mortgage Indenture and not released by the Trustee from the lien thereof prior to the time of delivery of the Bonds, subject only to the lien of the First Mortgage Indenture, to “permitted liens” as defined in the First Mortgage Indenture and to certain encumbrances and defects in respect of certain properties in service the aggregate book value of which is not deemed material; the description in the First Mortgage Indenture of such properties, rights and assets is adequate to constitute the First Mortgage Indenture a lien thereon; the First Mortgage Indenture, subject only to the matters referred to above, constitutes a valid and direct first lien on such properties, rights and assets, which include substantially all permanent fixed properties and franchises of the Company (except that real estate which is not used or useful in the public utility business of the Company is excluded from the lien of the First Mortgage Indenture by the provisions thereof); and all permanent fixed properties and franchises acquired by the Company subsequent to the time of issuance of the Bonds (except that in certain cases real estate which is not used or useful in the public utility business of the Company is

10

excluded from the lien of the First Mortgage Indenture by the provisions thereof) will be subject to the lien of the First Mortgage Indenture, subject, however, to “permitted liens” as defined in the First Mortgage Indenture and liens, if any, existing or placed on such properties at the time of acquisition thereof by the Company.

(vii)The First Mortgage Indenture, other than the Sixty-Fifth Supplemental Indenture, has been duly filed for record in such manner and in such places as are required by law in order to give constructive notice of, and to establish, preserve and protect the lien of, the First Mortgage Indenture on all property of the Company of every kind referred to in the First Mortgage Indenture as subject to the lien thereof.

(viii)Except as referred to in the Pricing Disclosure Package and the Prospectus, there is no action, suit or proceeding, inquiry or investigation, at law or in equity or before or by any court, public board or body, pending or, to such counsel’s knowledge, threatened against or affecting the Company, wherein an unfavorable decision, ruling or finding would (i) materially and adversely affect the condition (financial or otherwise), results of operations, business or properties of the Company or (ii) materially and adversely affect the transactions contemplated by this Agreement, or which would adversely affect the validity or enforceability of the First Mortgage Indenture or the Bonds.  The descriptions in the Registration Statement, the Pricing Disclosure Package and the Prospectus of any legal or governmental proceedings are accurate and fairly present the information required to be shown, and such counsel does not know of any litigation or any legal or governmental proceeding instituted or threatened against the Company or any of its properties that would be required to be disclosed in the Registration Statement, the Pricing Disclosure Package or the Prospectus and is not so disclosed.

(ix)An order of the IURC relating to the issuance of the Bonds has been duly entered and, to such counsel’s knowledge, has not been modified or repealed in any respect and is in full force and effect.  The issuance and sale of the Bonds to the Underwriters are in conformity with the terms of such order. Except as may be required under the 1933 Act or the securities or Blue Sky laws of any jurisdiction, no further consent, approval, authorization or order of, or registration or filing with, any court or governmental or public agency, authority or body is required with respect to the Company for the execution, delivery and performance of this Agreement, the First Mortgage Indenture or the Bonds, the issuance by the Company of the Bonds or the consummation by the Company of the transactions contemplated by this Agreement, the First Mortgage Indenture or the Bonds.

In addition, such counsel shall state that no facts have come to such counsel’s attention that have caused such counsel to believe that the Registration

11

Statement, at the Applicable Time, contained an 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 Prospectus, as of its date and as of the Closing Date, contained or contains an untrue statement of a material fact or omitted or omits 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 (except that in each case such counsel need not express an opinion as to the financial statements and other financial data included or incorporated by reference therein or excluded therefrom).  Such counsel shall further state that, in addition, no facts have come to such counsel’s attention that have caused such counsel to believe that the Pricing Disclosure Package, as of the Applicable Time, contained an untrue statement of a material fact or omitted 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 (except that such counsel need not express an opinion as to the financial statements and other financial data included or incorporated by reference therein or excluded therefrom).

Such counsel shall expressly authorize the Underwriters to rely on such counsel’s opinion dated the Closing Date delivered to the Trustee pursuant to the First Mortgage Indenture.

(f)You shall have received an opinion of Taft Stettinius & Hollister LLP, counsel to the Company, dated the Closing Date, to the effect that:

(i)The Sixty-Fifth Supplemental Indenture has been duly authorized, executed and delivered by the Company, and assuming due authorization, execution and delivery by the Trustee, the First Mortgage Indenture is a valid and binding instrument of the Company enforceable in accordance with its terms, except as (i) the enforceability thereof may be limited by bankruptcy, insolvency or similar laws affecting creditors’ rights generally, and (ii) the rights of acceleration and the availability of equitable remedies may be limited by equitable principles of general applicability.

(ii)The Bonds have been duly authorized, and when duly executed by the Company, authenticated by the Trustee and delivered to and paid for by the Underwriters pursuant to this Agreement, will be valid and binding obligations of the Company enforceable in accordance with their terms, except as (i) the enforceability thereof may be limited by bankruptcy, insolvency or similar laws affecting creditors’ rights generally and (ii) the rights of acceleration and the availability of equitable remedies may be limited by equitable principles of general applicability.

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

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(iv)The statements made in the Preliminary Prospectus and the Prospectus under the captions “Description of the Mortgage Bonds” and “Certain U.S. Federal Income Tax Considerations for Non-U.S. Holders,” and in the Base Prospectus under the caption “Description of the First Mortgage Bonds,” in each case insofar as such statements constitute summaries of the legal matters, documents or proceedings referred to therein, accurately and fairly summarize the matters referred to therein in all material respects.

(v)The Company is not, and solely after giving effect to the offering and sale of the Bonds and the application of the proceeds thereof as described in the Prospectus, will not be subject to registration and regulation as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended.

In rendering the foregoing opinions, such counsel may state that it has relied as to certain factual matters on information obtained from public officials, officers and representatives of the Company and has assumed that the signatures on all documents examined by it are genuine, and that such counsel has not independently verified such factual matters or assumptions. In addition, such counsel may assume matters governed by New York law.

You shall also have received a statement of Taft Stettinius & Hollister LLP, dated the Closing Date, to the effect that:

(1)no facts have come to such counsel’s attention that have caused such counsel to believe that the documents filed by the Company under the 1934 Act and the 1934 Act Regulations that are incorporated by reference in the Registration Statement, the Pricing Disclosure Package and the Prospectus, were not, on their face, appropriately responsive in all material respects to the requirements of the 1934 Act and the 1934 Act Regulations (except that in each case such counsel need not express any view as to the financial statements, schedules and other financial information included or incorporated by reference therein or excluded therefrom or the Form T-1);

(2)the Registration Statement, at the Applicable Time and the Prospectus, as of its date, appeared on their face to be appropriately responsive in all material respects to the requirements of the 1933 Act and the 1933 Act Regulations (except that in each case such counsel need not express any view as to the financial statements, schedules and other financial information included or incorporated by reference therein or excluded therefrom or the Form T-1); and

(3)no facts have come to such counsel’s attention that have caused such counsel to believe that the Registration Statement, at the Applicable Time, contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the

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statements therein not misleading, or that the Prospectus, as of its date and as of the Closing Date, contained or contains an untrue statement of a material fact or omitted or omits 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 (except that in each case such counsel need not express any view as to the financial statements, schedules and other financial information included or incorporated by reference therein or excluded therefrom or the Form T-1).

Such counsel shall further state that, in addition, no facts have come to such counsel’s attention that have caused such counsel to believe that the Pricing Disclosure Package, as of the Applicable Time, contained an untrue statement of a material fact or omitted 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 (except that in each case such counsel need not express any view as to the financial statements, schedules and other financial information included or incorporated by reference therein or excluded therefrom or the Form T-1).

In addition, such statement shall confirm that the Prospectus has been filed with the Commission within the time period required by Rule 424(b) of the 1933 Act Regulations and any required filing of a Permitted Free Writing Prospectus pursuant to Rule 433 of the 1933 Act Regulations has been made with the Commission within the time period required by Rule 433(d) of the 1933 Act Regulations. Such statement shall further state that the Registration Statement became effective upon filing under the 1933 Act and the First Mortgage Indenture has been qualified under the 1939 Act, and that such counsel has been orally advised by the Commission that no stop order suspending the effectiveness of the Registration Statement has been issued and, to such counsel’s knowledge, no proceedings for that purpose have been instituted or are pending or threatened by the Commission.

In addition, such counsel may state that such counsel does not pass upon, or assume any responsibility for, the accuracy, completeness or fairness of the statements contained or incorporated by reference in the Registration Statement, the Pricing Disclosure Package or the Prospectus and has made no independent check or verification thereof (except to the limited extent referred to in Section 6(f)(iv) above).

(g)You shall have received opinions and statements of Sidley Austin LLP, counsel for the Underwriters, dated the Closing Date, as to such matters as you may reasonably request; the Company shall have furnished Sidley Austin LLP with such documents as it reasonably requests for the purpose of enabling it to satisfy such request.  In giving its opinion, Sidley Austin LLP may rely on the opinions of Kelley A. Karn, Esq., Deputy General Counsel of Duke Energy Business Services LLC, and Taft Stettinius & Hollister LLP (or other appropriate counsel reasonably satisfactory to the Representatives) as to matters of Indiana law.

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(h)On or after the date hereof, there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally or of the securities of Duke Energy Corporation, on the New York Stock Exchange; or (ii) a general moratorium on commercial banking activities in New York declared by either Federal or New York State authorities or a material disruption in commercial banking services or securities settlement or clearance services in the United States; or (iii) the outbreak or escalation of hostilities involving the United States or the declaration by the United States of a national emergency or war, if the effect of any such event specified in this subsection (h) in your reasonable judgment makes it impracticable or inadvisable to proceed with the public offering or the delivery of the Bonds on the terms and in the manner contemplated in the Pricing Disclosure Package and the Prospectus. In such event there shall be no liability on the part of any party to any other party except as otherwise provided in Section 7 hereof and except for the expenses to be borne by the Company as provided in Section 5(j) hereof.

(i)You shall have received a certificate of the Chairman of the Board, the President, any Vice President, the Secretary or an Assistant Secretary and any financial or accounting officer of the Company, dated the Closing Date, in which such officers, to the best of their knowledge after reasonable investigation, shall state that the representations and warranties of the Company in this Agreement are true and correct as of the Closing Date, that the Company has complied with all agreements and satisfied all conditions on its part to be performed or satisfied at or prior to the Closing Date, that the conditions specified in Section 6(c) and Section 6(d) have been satisfied, and that no stop order suspending the effectiveness of the Registration Statement has been issued and no proceedings for that purpose have been instituted or are threatened by the Commission.

(j)At the time of the execution of this Agreement, you shall have received a letter dated such date, in form and substance satisfactory to you, from Deloitte & Touche LLP, the Company’s 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 or incorporated by reference in the Registration Statement, the Pricing Disclosure Package and the Prospectus, including specific references to inquiries regarding any increase in long-term debt (excluding current maturities), decrease in net current assets (defined as current assets less current liabilities) or stockholder’s equity, and decrease in operating revenues or net income for the period subsequent to the latest financial statements incorporated by reference in the Registration Statement, as compared with the corresponding period in the preceding year, as of a specified date not more than three business days prior to the date of this Agreement.

(k)At the Closing Date, you shall have received from Deloitte & Touche LLP, a letter dated as of the Closing Date, to the effect that they reaffirm the statements made in the letter furnished pursuant to subsection (j) of this Section 6, except

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that the specified date referred to shall be not more than three business days prior to the Closing Date.

(l)An appropriate order or orders of the IURC necessary to permit the issue and sale of the Bonds as contemplated hereby and containing no material provision or condition which is unacceptable to the Company or the Underwriters shall be in effect and no proceedings to suspend the effectiveness of such order or orders shall be pending or threatened.

The Company will furnish you with such conformed copies of such opinions, certificates, letters and documents as you reasonably request.

7.Indemnification. (a)  The Company agrees to indemnify and hold harmless each Underwriter, their respective officers and directors, and each person, if any, who controls any Underwriter within the meaning of Section 15 of the 1933 Act, as follows:

(i)against any and all loss, liability, claim, damage and expense whatsoever arising out of any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement (or any amendment thereto) including the Rule 430B Information, or the omission or alleged omission therefrom of a material fact required to be stated therein or necessary to make the statements therein not misleading or arising out of any untrue statement or alleged untrue statement of a material fact contained in the Preliminary Prospectus, the Pricing Disclosure Package, the Prospectus (or any amendment or supplement thereto) or any Permitted Free Writing Prospectus, or the omission or alleged omission therefrom of a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, unless such statement or omission or such alleged statement or omission was made in reliance upon and in conformity with written information furnished to the Company by the Representatives on behalf of the Underwriters expressly for use in the Registration Statement (or any amendment thereto), the Preliminary Prospectus, the Pricing Disclosure Package, the Prospectus (or any amendment or supplement thereto) or any Permitted Free Writing Prospectus;

(ii)against any and all loss, liability, claim, damage and expense whatsoever to the extent of the aggregate amount paid in settlement of any litigation, commenced or threatened, or of any claim whatsoever based upon any such untrue statement or omission or any such alleged untrue statement or omission, if such settlement is effected with the written consent of the Company; and

(iii)against any and all expense whatsoever reasonably incurred in investigating, preparing or defending against any litigation, commenced or threatened, or any claim whatsoever based upon any such untrue statement

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or omission, or any such alleged untrue statement or omission, to the extent that any such expense is not paid under (i) or (ii) of this Section 7.

In no case shall the Company be liable under this indemnity agreement with respect to any claim made against any Underwriter or any such controlling person unless the Company shall be notified in writing of the nature of the claim within a reasonable time after the assertion thereof, but failure so to notify the Company shall not relieve it from any liability which it may have otherwise than under subsections 7(a) and 7(b). The Company shall be entitled to participate at its own expense in the defense, or if it so elects within a reasonable time after receipt of such notice, to assume the defense of any suit brought to enforce any such claim, but if it so elects to assume the defense, such defense shall be conducted by counsel chosen by it and approved by the Underwriter or Underwriters or controlling person or persons, or defendant or defendants in any suit so brought, which approval shall not be unreasonably withheld. In any such suit, any Underwriter or any such controlling person shall have the right to employ its own counsel, but the fees and expenses of such counsel shall be at the expense of such Underwriter or such controlling person unless (i) the Company and such Underwriter shall have mutually agreed to the employment of such counsel, or (ii) the named parties to any such action (including any impleaded parties) include both such Underwriter or such controlling person and the Company and such Underwriter or such controlling person shall have been advised by such counsel that a conflict of interest between the Company and such Underwriter or such controlling person may arise and for this reason it is not desirable for the same counsel to represent both the indemnifying party and also the indemnified party (it being understood however, that the Company shall not, in connection with any one such action or separate but substantially similar or related actions in the same jurisdiction arising out of the same general allegations or circumstances, be liable for the reasonable fees and expenses of more than one separate firm of attorneys for all such Underwriters and all such controlling persons, which firm shall be designated in writing by you). The Company agrees to notify you within a reasonable time of the assertion of any claim against it, any of its officers or directors or any person who controls the Company within the meaning of Section 15 of the 1933 Act, in connection with the sale of the Bonds.

(b)Each Underwriter severally agrees that it will indemnify and hold harmless the Company, its directors and each of the officers of the Company who signed the Registration Statement and each person, if any, who controls the Company within the meaning of Section 15 of the 1933 Act to the same extent as the indemnity contained in subsection (a) of this Section 7, but only with respect to statements or omissions made in the Registration Statement (or any amendment thereto), the Preliminary Prospectus, the Pricing Disclosure Package, the Prospectus (or any amendment or supplement thereto) or any Permitted Free Writing Prospectus, in reliance upon and in conformity with written information furnished to the Company by the Representatives on behalf of the Underwriters expressly for use in the Registration Statement (or any amendment thereto), the Preliminary Prospectus, the Pricing Disclosure Package, the Prospectus (or any amendment or supplement thereto) or any Permitted Free Writing Prospectus.  In case any action shall be brought against the Company or any person so indemnified based on the Registration Statement (or any amendment thereto), the Preliminary Prospectus, the Pricing Disclosure Package, the Prospectus (or any amendment or supplement

17

thereto) or any Permitted Free Writing Prospectus, and in respect of which indemnity may be sought against any Underwriter, such Underwriter shall have the rights and duties given to the Company, and the Company and each person so indemnified shall have the rights and duties given to the Underwriters, by the provisions of subsection (a) of this Section 7.

(c)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, and does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party.

(d)If the indemnification provided for in this Section 7 is unavailable to or insufficient to hold harmless an indemnified party in respect of any and all loss, liability, claim, damage and expense whatsoever (or actions in respect thereof) that would otherwise have been indemnified under the terms of such indemnity, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of such loss, liability, claim, damage or expense (or actions in respect thereof) in such proportion as is appropriate to reflect the relative benefits received by the Company on the one hand and the Underwriters on the other from the offering of the Bonds. If however, the allocation provided by the immediately preceding sentence is not permitted by applicable law, or if the indemnified party failed to give the notice required above, then each indemnifying party shall contribute to such amount paid or payable by such indemnified party 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 the Underwriters on the other in connection with the statements or omissions which resulted in such loss, liability, claim, damage or expense (or actions in respect thereof), 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 shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company bear to the total compensation received by the Underwriters in respect of the underwriting discount as set forth in the table on the cover page of the Prospectus. The relative fault 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 on the one hand or the Underwriters on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 7 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 which does not take account of the equitable considerations referred to above in this Section 7.

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The amount paid or payable by an indemnified party as a result of the losses, liabilities, claims, damages or expenses (or actions in respect thereof) referred to above in this Section 7 shall be deemed to include 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 7, no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Bonds underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which 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 1933 Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations to contribute are several in proportion to their respective underwriting obligations and not joint.

8.Default by One or More of the Underwriters.  (a)  If any Underwriter shall default in its obligation to purchase the principal amount of the Bonds which it has agreed to purchase hereunder on the Closing Date, you may in your discretion arrange for you or another party or other parties to purchase such Bonds, as applicable, on the terms contained herein. If within thirty-six hours after such default by any Underwriter you do not arrange for the purchase of such Bonds, then the Company shall be entitled to a further period of thirty-six hours within which to procure another party or other parties satisfactory to you to purchase such Bonds on such terms. In the event that, within the respective prescribed periods, you notify the Company that you have so arranged for the purchase of such Bonds, or the Company notifies you that it has so arranged for the purchase of such Bonds, you or the Company shall have the right to postpone such Closing Date for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary in the Registration Statement or the Prospectus, or in any other documents or arrangements, and the Company agrees to file promptly any amendments to the Registration Statement, the Pricing Disclosure Package or the Prospectus which may be required. The term “Underwriter” as used in this Agreement shall include any person substituted under this Section 8 with like effect as if such person had originally been a party to this Agreement with respect to such Bonds.

(b)If, after giving effect to any arrangements for the purchase of the Bonds of a defaulting Underwriter or Underwriters by you or the Company as provided in subsection (a) above, the aggregate amount of such Bonds which remains unpurchased does not exceed one-tenth of the aggregate amount of all the Bonds to be purchased at such Closing Date, then the Company shall have the right to require each non-defaulting Underwriter to purchase the amount of Bonds which such Underwriter agreed to purchase hereunder at such Closing Date and, in addition, to require each non-defaulting Underwriter to purchase its pro rata share (based on the amount of Bonds which such Underwriter agreed to purchase hereunder) of the Bonds of such defaulting Underwriter or Underwriters for which such arrangements have not been made; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

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(c)If, after giving effect to any arrangements for the purchase of the Bonds of a defaulting Underwriter or Underwriters by you or the Company as provided in subsection (a) above, the aggregate amount of such Bonds which remains unpurchased exceeds one-tenth of the aggregate amount of all the Bonds to be purchased at such Closing Date, or if the Company shall not exercise the right described in subsection (b) above to require non-defaulting Underwriters to purchase Bonds of a defaulting Underwriter or Underwriters, then this Agreement shall thereupon terminate, without liability on the part of any non-defaulting Underwriter or the Company, except for the expenses to be borne by the Company as provided in Section 5(j) hereof and the indemnity and contribution agreement in Section 7 hereof; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

9.Representations and Indemnities to Survive Delivery. The respective indemnities, agreements, representations, warranties and other statements of the Company or its officers and of the several Underwriters set forth in or made pursuant to this Agreement will remain in full force and effect, regardless of any investigation, or statement as to the results thereof, made by or on behalf of any Underwriter or the Company, or any of its officers or directors or any controlling person, and will survive delivery of and payment for the Bonds.

10.Reliance on Your Acts. In all dealings hereunder, the Representatives shall act on behalf of each of the Underwriters, and the Company shall be entitled to act and rely upon any statement, request, notice or agreement on behalf of any Underwriter made or given by the Representatives.

11.No Fiduciary Relationship.  The Company acknowledges and agrees that (i) the purchase and sale of the Bonds pursuant to this Agreement is an arm’s-length commercial transaction between the Company on the one hand, and the Underwriters on the other hand, (ii) in connection with the offering contemplated hereby and the process leading to such transaction, each Underwriter is and has been acting solely as a principal and is not the agent or fiduciary of the Company or its shareholders, creditors, employees, or any other party, (iii) no Underwriter has assumed or will assume an advisory or fiduciary responsibility in favor of the Company with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company on other matters) and no Underwriter has any obligation to the Company with respect to the offering contemplated hereby except the obligations expressly set forth in this Agreement, (iv) the Underwriters and their respective affiliates may be engaged in a broad range of transactions that involve interests that differ from those of the Company, and (v) the Underwriters have not provided any legal, accounting, regulatory or tax advice with respect to the transaction contemplated hereby and the Company has consulted its own legal, accounting, regulatory and tax advisors to the extent it deemed appropriate.

12.Notices. All communications hereunder will be in writing and, if sent to the Underwriters, will be mailed or telecopied and confirmed to RBC Capital Markets, LLC, 200 Vesey Street, New York, New York 10281, Attention: DCM Transaction Management (Fax no.: (212) 658-6137); RBS Securities Inc, 600 Washington Boulevard, Stamford, Connecticut 06901, Attention: Debt Capital Markets Syndicate (Fax no.: (203) 873-4534); and UBS Securities LLC,

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677 Washington Boulevard, Stamford, Connecticut 06901, Attention: Fixed Income Syndicate (Fax no.: (203) 719-0495), or if sent to the Company, will be mailed or telecopied and confirmed to it at 526 South Church Street, Charlotte, North Carolina 28202, facsimile number (704) 382-3288, attention of Treasurer. Any such communications shall take effect upon receipt thereof.

13.   Business Day. As used herein, the term “business day” shall mean any day when the Commission’s office in Washington, D.C. is open for business.

14.   Successors. This Agreement shall inure to the benefit of and be binding upon the Underwriters and the Company and their respective successors.  Nothing expressed or mentioned in this Agreement is intended or shall be construed to give any person, firm or corporation, other than the parties hereto and their respective successors and the controlling persons, officers and directors referred to in Section 7 and their respective successors, heirs and legal representatives, any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision herein contained; this Agreement and all conditions and provisions hereof being intended to be and being for the sole and exclusive benefit of the parties hereto and their respective successors and said controlling persons, officers and directors and their respective successors, heirs and legal representatives, and for the benefit of no other person, firm or corporation. No purchaser of Bonds from any Underwriter shall be deemed to be a successor or assign by reason merely of such purchase.

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

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

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If the foregoing is in accordance with your understanding, kindly sign and return to us two counterparts hereof, and upon confirmation and acceptance by the Underwriters, this letter and such confirmation and acceptance will become a binding agreement between the Company, on the one hand, and each of the Underwriters, on the other hand, in accordance with its terms.

Very truly yours,
DUKE ENERGY INDIANA, INC.
By:	/s/ M. Allen Carrick
	Name: M. Allen Carrick
	Title: Assistant Treasurer

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

RBC CAPITAL MARKETS, LLC	RBS SECURITIES INC.
/s/ John Sconzo	/s/ Jennifer Powers
Name: John Sconzo	Name: Jennifer Powers
Title: Managing Director	Title: Managing Director
UBS SECURITIES LLC
/s/ Scott Whitney
Name: Scott Whitney
Title: Managing Director
UBS Securities, LLC
/s/ Mark Spadaccini
Name: Mark Spadaccini
Title: Director
UBS Securities, LLC

For themselves and as Representatives of the several Underwriters named on Schedule A hereto.

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SCHEDULE A

Underwriter	Principal Amount of Bonds to be Purchased
RBC Capital Markets, LLC	$	70,000,000
RBS Securities Inc.	70,000,000
UBS Securities LLC	70,000,000
China International Capital Corporation Hong Kong Securities Limited (with CICC US Securities, Inc. acting as its selling agent in the United States)	20,000,000
Fifth Third Securities, Inc.	10,000,000
PNC Capital Markets LLC	10,000,000
Total	$	250,000,000

A-1

SCHEDULE B

PRICING DISCLOSURE PACKAGE

Item

1)             Base Prospectus

2)             Preliminary Prospectus Supplement dated March 12, 2012

3)             Permitted Free Writing Prospectuses

a)       Pricing Term Sheet attached as Schedule C hereto

B-1

SCHEDULE C

Filed pursuant to Rule 433

March 12, 2012

Relating to

Preliminary Prospectus Supplement dated March 12, 2012 to

Prospectus dated September 29, 2010

Registration Statement No. 333-169633-02

Duke Energy Indiana, Inc.
$250,000,000 First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042

Pricing Term Sheet

Issuer:	Duke Energy Indiana, Inc.
Settlement:	March 15, 2012; T+3
Interest Payment Dates:	March 15 and September 15, commencing September 15, 2012
Security Description:	First Mortgage Bonds, Series UUU, 4.20%, Due March 15, 2042
Principal Amount:	$250,000,000
Maturity:	March 15, 2042
Coupon:	4.20%
Benchmark Treasury:	3.125% due November 15, 2041
Benchmark Treasury Yield:	3.161%
Spread to Benchmark Treasury:	+105 bps
Yield to Maturity:	4.211%
Initial Price to Public:	99.814% per Bond
Redemption Provisions	At any time before September 15, 2041, the Mortgage Bonds will be redeemable in whole or in part, at the issuer’s option at any time, at a redemption price equal to the greater of (i) 100% of the principal amount of such Mortgage Bonds to be redeemed and (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon (exclusive of interest accrued to the date of redemption ) discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the treasury rate plus 15 basis points, plus in

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	each case accrued interest to the date of redemption. At any time on or after September 15, 2041, the Mortgage Bonds will be redeemable in whole or in part, at the issuer’s option at any time, at a redemption price equal to 100% of the principal amount of such Mortgage Bonds to be redeemed plus accrued interest to the date of redemption.
CUSIP:	263901 AD2
ISIN:	US263901AD25
Book-Running Managers:	RBC Capital Markets, LLC RBS Securities Inc. UBS Securities LLC
Co-Managers:	China International Capital Corporation Hong Kong Securities Limited (with CICC US Securities, Inc. acting as its selling agent in the United States) Fifth Third Securities, Inc. PNC Capital Markets LLC

*Security ratings are not recommendations to buy, sell or hold securities.  The ratings are subject to change or withdrawal at any time by the respective credit rating agencies.

The issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates.  Before you invest, you should read the prospectus in that registration statement and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering.  You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov.  Alternatively, the issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling RBC Capital Markets, LLC toll-free at (866) 375-6829, RBS Securities Inc. toll-free at (866) 884-2071 or UBS Securities LLC toll-free at (877) 827-6444 (ext. 561-3884).

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