POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this     21st   day of February, 2007.

/s/ R. A. Bemis

Richard A. Bemis

Director

POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this     21st   day of February, 2007.

/s/ Albert J. Budney, Jr.

Albert J. Budney, Jr.

Director

POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this    21st   day of February, 2007.

/s/ Ellen Carnahan

Ellen Carnahan

Director

POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this     21st   day of February, 2007.

/s/ Robert C. Gallagher

Robert C. Gallagher

Director

POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this     21st   day of February, 2007.

/s/ Kathryn M. Hasselblad-Pascale

Kathryn M. Hasselblad-Pascale

Director

POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this     21st   day of February, 2007.

/s/ James L. Kemerling

James L. Kemerling

Director

POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this     21st   day of February, 2007.

/s/ J. C. Meng

John C. Meng

Director

POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this     21st   day of February, 2007.

/s/ William F. Protz, Jr.

William F. Protz, Jr.

Director

POWER OF ATTORNEY

        WHEREAS, INTEGRYS ENERGY GROUP, INC. a Wisconsin corporation (hereinafter referred to as “Integrys”) will file with the Securities and Exchange Commission, under the provisions of the Securities Act of 1933, Form S-8 Registration Statement(s) for the Long Term Incentive Compensation Plan, a sub plan of the Peoples Energy Corporation 2004 Incentive Compensation Plan, the Peoples Energy Corporation Directors Deferred Compensation Plan, the Peoples Energy Corporation Directors Stock and Option Plan, and the Peoples Energy Corporation Long Term Incentive Compensation Plan, effective February 22, 1990 and as subsequently amended, and

        WHEREAS, the undersigned is a Director of Integrys;

        NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O’Leary, Peter H. Kauffman, and Barth J. Wolf or any one of them, as attorney, with full power to act for the undersigned and in the name, place and stead of the undersigned, to sign the name of the undersigned as Director to said Registration Statement on Form S-8 and any and all amendments to said statements, hereby ratifying and confirming all that said attorney may or shall lawfully do or cause to be done by virtue hereof.

        IN WITNESS WHEREOF, the undersigned has executed this document this     21st   day of February, 2007.

/s/ Larry L. Weyers

Larry L. Weyers

Director