Common Contracts

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, 2007

First Supplemental Indenture • March 9th, 2007 • Integrys Energy Group, Inc. • Electric & other services combined • Illinois

• Contract Type
  First Supplemental Indenture
• Filed
  March 9th, 2007
• Company
  Integrys Energy Group, Inc.
• Industry
  Electric & other services combined
• Jurisdiction
  Illinois

This 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).

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 ______________________, 2007

First Supplemental Indenture • February 16th, 2007 • WPS Resources Corp • Electric & other services combined • Illinois

• Contract Type
  First Supplemental Indenture
• Filed
  February 16th, 2007
• Company
  WPS Resources Corp
• Industry
  Electric & other services combined
• Jurisdiction
  Illinois

This First Supplemental Indenture, dated as of _______________, 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).