EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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   28th     day of   February  , 2007.

/s/ R. A. Bemis

Richard A. Bemis

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th      day of   February  , 2007.

/s/ Albert J. Budney, Jr.

Albert J. Budney, Jr.

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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   28th     day of   February  , 2007.

/s/ Ellen Carnahan

Ellen Carnahan

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th     day of   February  , 2007.

/s/ Robert C. Gallagher

Robert C. Gallagher

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th     day of   February  , 2007.

/s/ Kathryn M. Hasselblad-Pascale

Kathryn M. Hasselblad-Pascale

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th      day of   February  , 2007.

/s/ James L. Kemerling

James L. Kemerling

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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   28th     day of   February  , 2007.

/s/ J. C. Meng

John C. Meng

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th    day of   February  , 2007.

/s/ William F. Protz, Jr.

William F. Protz, Jr.

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, INTEGRYS ENERGY GROUP, INC., a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Integrys Energy Group, Inc.;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th      day of   February  , 2007.

/s/ Larry L. Weyers

Larry L. Weyers

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, WISCONSIN PUBLIC SERVICE CORPORATION, a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Wisconsin Public Service Corporation;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th     day of   February  , 2007.

/s/ Lawrence T. Borgard

Lawrence T. Borgard

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, WISCONSIN PUBLIC SERVICE CORPORATION, a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Wisconsin Public Service Corporation;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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   28th     day of   February  , 2007.

/s/ Thomas P. Meinz

Thomas P. Meinz

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, WISCONSIN PUBLIC SERVICE CORPORATION, a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Wisconsin Public Service Corporation;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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   28th     day of   February  , 2007.

/s/ Phillip M. Mikulsky

Phillip M. Mikulsky

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, WISCONSIN PUBLIC SERVICE CORPORATION, a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Wisconsin Public Service Corporation;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th     day of   February  , 2007.

/s/ Joseph P. O'Leary

Joseph P. O'Leary

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, WISCONSIN PUBLIC SERVICE CORPORATION, a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Wisconsin Public Service Corporation;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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    28th     day of   February  , 2007.

/s/ Charles A. Schrock

Charles A. Schrock

Director

EXHIBIT 24

POWER OF ATTORNEY

WHEREAS, WISCONSIN PUBLIC SERVICE CORPORATION, a Wisconsin corporation, will file on or before the due date of March 1, 2007 with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, an annual report on Form 10-K, and

WHEREAS, the undersigned is a Director of Wisconsin Public Service Corporation;

NOW, THEREFORE, the undersigned hereby constitutes and appoints Larry L. Weyers, Joseph P. O'Leary, Bradley A. Johnson, Diane L. Ford, and Peter H. Kauffman 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 annual report on Form 10-K and any and all amendments to said annual report, 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     28th      day of   February  , 2007.

/s/ Larry L. Weyers

Larry L. Weyers

Director