UNITED STATES SECURITES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM U-9C-3 QUARTERLY REPORT PURSUANT TO RULE 58 For the quarter ended December 31, 2003 ALLEGHENY ENERGY, INC. (Name of registered holding company) 10435 Downsville Pike, Hagerstown, Maryland 21740-1766 (Address of principal executive offices)
Inquiries concerning this Form U-9C-3 should be directed to:	Thomas R. Gardner Allegheny Energy, Inc. 10435 Downsville Pike Hagerstown, MD 21740-1766 (301) 665-2711

ITEM 1 - ORGANIZATION CHART

Name

Energy or

State

Percentage

of Reporting

gas-related

Date of

Of

of Voting

Company

Company

Organization

Organization

Securities Held

This section is not required for fourth quarter filings.

ITEM 2 - ISSUANCES AND RENEWALS OF SECURITIES AND CAPITAL CONTRIBUTIONS

Company

Company

Amount

Contributing

Receiving

Of Capital

Capital

Capital

Contribution

No new issues or renewals of securities and capital contributions.

ITEM 3 - ASSOCIATE TRANSACTIONS

Part I - Transactions performed by reporting companies on behalf of associate companies

Reporting

Associate

Company

Company

Types of

Direct

Indirect

Cost

Total

Rendering

Receiving

Services

Costs

Costs

Of

Amount

Services

Services

Rendered

Charged

Charged

Capital

Billed

No services have been provided by the reporting company to associate companies to date.

Part II - Transactions performed by associate companies on behalf of reporting companies
(In thousands)
Associate	Reporting
Company	Company	Types of	Direct	Indirect	Cost	Total
Rendering	Receiving	Services	Costs	Costs	Of	Amount
Services	Services	Rendered	Charged	Charged	Capital	Billed
Allegheny Energy Service Corporation	Allegheny Energy Solutions, Inc.	Technical support; planning & implementation of financial programs; counsel on corporate, legal and regulatory matters; general and administrative services	$67	$213	-	$280

ITEM 4 - SUMMARY OF AGGREGATE INVESTMENT (In thousands)
Investments in energy-related companies:
	Total consolidated capitalization as of December 31, 2003			$7,329,206		line 1
	Total capitalization multiplied by 15%
	(line 1 multiplied by 0.15)			$1,099,381		line 2
	Greater of $50 million or line 2				$1,099,381	line 3
	Total current aggregate investment:
	(categorized by major line of energy-related business)
		Allegheny Ventures, Inc.: (including Allegheny Energy Solutions Inc. and Alliance Gas Services Holdings, LLC)		$     41,510
		Allegheny Energy Supply Company LLC: (including NYC Energy and Buchanan Energy of VA LLC)		$     49,772
			Total current aggregate investment		$     91,282	line 4
	Difference between the greater of $50 million or 15%
	of capitalization and the total aggregate investment
	of the registered holding company system
	(line 3 less line 4)				$1,008,099	line 5
Investments in gas-related companies:
	None

ITEM 5 - OTHER INVESTMENTS
Major Line	Other	Other
of Energy-Related	Investment in Last	Investment in This	Reason for Difference in
Business	U-9C-3 Report	U-9C-3 Report	Other Investment
None
ITEM 6 - FINANCIAL STATEMENTS AND EXHIBITS
No exhibits required.

Signature
Pursuant to the requirements of the Public Utilities Holding Company Act of 1935, Allegheny Energy, Inc. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
March 30, 2004	ALLEGHENY ENERGY, INC. /s/ Thomas R. Gardner Vice President and Controller (Chief Accounting Officer)