X0202 4 2006-08-09 0 0000003673 ALLEGHENY ENERGY, INC AYE 0001300135 Dudzinski Edward C/O ALLEGHENY ENERGY, INC. 800 CABIN HILL DRIVE GREENSBURG PA 15601 0 1 0 0 Vice President Common Stock, $1.25 par value 2006-08-09 4 M 0 5000 41.32 A 8470 D Common Stock, $1.25 par value 2006-08-09 4 F 0 1530 41.32 D 6940 D Common Stock, $1.25 par value 1949.4529 I ESOSP Stock Units 2006-08-09 4 M 0 5000 D Common Stock 5000 15000 D Represents shares of the Issuer's Common Stock issued to Mr. Dudzinski in connection with the vesting of Stock Units. Calculated based on the average of the high and low sale prices for a share of the Issuer's Common Stock on the New York Stock Exchange on August 9, 2006. Shares of the Issuer's Common Stock withheld as payment for minimum required federal, state and local tax withholdings. Held through the Allegheny Energy, Inc. Employee Stock Ownership and Savings Plan. Mr. Dudzinski was granted 25,000 Stock Units on August 9, 2004. One-fifth of the Stock Units vested on August 9, 2005 and was paid on September 15, 2005, and one-fifth of the Stock Units vested and was paid on August 9, 2006. The remaining 15,000 Stock Units will vest in equal installments on each August 9 from 2007 through 2009, provided that Mr. Dudzinski is an employee of the Issuer on the applicable vesting date. The Issuer will pay Mr. Dudzinski the full value of each vested Stock Unit in stock, subject to his election to defer payments, if any. Amanda J. Skov, Attorney-in-Fact 2006-08-11