X0202 4 2007-08-09 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 2007-08-09 4 M 0 5000 54.235 A 11940 D Common Stock, $1.25 par value 2007-08-09 4 F 0 1531 54.235 D 10409 D Common Stock, $1.25 par value 2726.269 I ESOSP Stock Units 2007-08-09 4 M 0 5000 D Common Stock 5000 10000 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, 2007. 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, one-fifth of the Stock Units vested and was paid on August 9, 2006 and one-fifth of the Stock Units vested and was paid on August 9, 2007. The remaining 10,000 Stock Units will vest in equal installments on August 9, 2008 and August 9, 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. /s/ Amanda J. Skov, Attorney-in-Fact 2007-08-13