INTERSTATE POWER AND LIGHT COMPANY (an Iowa corporation) 3.25% SENIOR DEBENTURES DUE 2024 UNDERWRITING AGREEMENT Dated: November 17, 2014Interstate Power and Light Company • November 24th, 2014 • Interstate Power & Light Co • Electric & other services combined • New York
Interstate Power and Light Company, an Iowa corporation (the “Company”), confirms its agreement (the “Agreement”) with Barclays Capital Inc. (“Barclays”), BNY Mellon Capital Markets, LLC (“BNY Mellon”) and Goldman, Sachs & Co. (“Goldman”), and each of the other underwriters named on Schedule A hereto (collectively, the “Underwriters”, which term shall also include any underwriter substituted as hereinafter provided in Section 10 hereof), for whom Barclays, BNY Mellon and Goldman are acting as representatives (in such capacity, the “Representatives”), with respect to the issue and sale by the Company and the purchase by the Underwriters, acting severally and not jointly, of the respective principal amounts set forth on Schedule A of $250,000,000 aggregate principal amount of the Company’s 3.25% Senior Debentures due 2024 (the “Securities”). The Securities will be issued pursuant to an indenture dated as of August 20, 2003 (the “Base Indenture”) between the Company and The Bank of New Yo
