INTERSTATE POWER AND LIGHT COMPANY (an Iowa corporation) 4.700% SENIOR DEBENTURES DUE 2043 UNDERWRITING AGREEMENT Dated: October 3, 2013Interstate Power and Light Company • October 8th, 2013 • 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 Goldman, Sachs & Co. (“Goldman”), Mitsubishi UFJ Securities (USA), Inc. (“Mitsubishi”) and RBS Securities Inc. (“RBS”), 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 Goldman, Mitsubishi and RBS 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 4.700% Senior Debentures due 2043 (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 York Me
