File No. 70-7888 (Request to Re-authorize Money Pool) SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 POST-EFFECTIVE AMENDMENT NO. 21 FORM U-1 APPLICATION / DECLARATION UNDER THE PUBLIC UTILITY HOLDING COMPANY ACT OF 1935
Allegheny Energy, Inc. 10435 Downsville Pike Hagerstown, MD 21740 Allegheny Energy Service Corp. 800 Cabin Hill Drive Greensburg, PA 15601 Allegheny Generating Company 10435 Downsville Pike Hagerstown, MD 21740		Monongahela Power Company 1310 Fairmont Avenue Fairmont, WV 26554 The Potomac Edison Company 10435 Downsville Pike Hagerstown, MD 21740 West Penn Power Company 800 Cabin Hill Drive Greensburg, PA 15601 Allegheny Energy Supply, LLC. 10435 Downsville Pike Hagerstown, MD 21740
(Name of company or companies filing this statement and addresses of principal executive offices)
Allegheny Energy, Inc.
(Name of top registered holding company parent of each applicant or declarant) The Commission is requested to send copies of all notices, orders and communications in connection with this Application / Declaration to:
Thomas K. Henderson, Esq. Vice President and General Counsel Allegheny Energy, Inc. 10435 Downsville Pike Hagerstown, MD 21740	Anthony Wilson, Esq. Senior Counsel Allegheny Energy Service Corporation 10435 Downsville Pike Hagerstown, MD 21740		Carol G. Russ, Esq. Senior Counsel Allegheny Energy Service Corporation 800 Cabin Hill Drive Greensburg, PA 15601

1.         Applicants hereby amend the application by adding:

                      "Allegheny Energy Supply Company, LLC" as an Applicant.

2.         Applicants hereby amend the application by adding the following description:

"Allegheny Generating Company ("AGC"), a jointly owned public utility subsidiary                         of Allegheny Energy Supply Company and Monongahela, located in Hagerstown,                       Maryland"
SIGNATURE
Pursuant to the requirements of the Public Utility Holding Company Act of 1935, the undersigned Applicants have duly caused this statement to be signed on their behalf by the undersigned thereunto duly authorized.
	Allegheny Energy Service Corporation Allegheny Energy, Inc. Allegheny Generating Company The Potomac Edison Company Monongahela Power Company West Penn Power Company Allegheny Energy Supply Company, LLC By /s/ THOMAS K. HENDERSON      Thomas K. Henderson
Dated  November 13, 2001