PEOPLES ENERGY CORPORATION AND INTEGRYS ENERGY GROUP, INC. TO THE BANK OF NEW YORK TRUST COMPANY, N.A., as Trustee FIRST SUPPLEMENTAL INDENTURE Dated as of March 5, 2007First Supplemental Indenture • March 9th, 2007 • Integrys Energy Group, Inc. • Electric & other services combined • Illinois
Contract Type FiledMarch 9th, 2007 Company Industry JurisdictionThis First Supplemental Indenture, dated as of March 5, 2007 (this “First Supplemental Indenture”), by and among Peoples Energy Corporation, an Illinois corporation (“PEC”), Integrys Energy Group, Inc., a Wisconsin corporation (“Integrys”), and The Bank of New York Trust Company, N.A. (successor to Bank One Trust Company National Association) (the “Trustee”), as trustee under the Original Indenture (defined below).