Company:  ALLEGHENY ENERGY, INC
Form Type:  10-Q
Filing Date:  11/6/2008 
CIK:  0000003673 
Address:  800 CABIN HILL DRIVE 
City, State, Zip:  GREENSBURG, Pennsylvania 15601 
Telephone:  (724) 837-3000 
Fiscal Year:  12/31 
Description of Business
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  FORM 10-Q
    PART I
      FINANCIAL STATEMENTS
        INCOME STATEMENT
        CASH FLOW
        CASH FLOW
        BALANCE SHEET
        BALANCE SHEET
        STOCKHOLDERS EQUITY
        NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
          BALANCE SHEET
      ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
      ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 4. CONTROLS AND PROCEDURES
    PART II. OTHER INFORMATION
      ITEM 1. LEGAL PROCEEDINGS
      ITEM 1A. RISK FACTORS
      ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF ...
      ITEM 3. DEFAULTS UPON SENIOR SECURITIES
      ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
      ITEM 5. OTHER INFORMATION
    EXHIBIT INDEX
    SIGNATURE
  EXHIBIT 3.1
  EXHIBIT 10.1
  EXHIBIT 10.2
  EXHIBIT 10.3
  EXHIBIT 31.1
    CERTIFICATION
  EXHIBIT 31.2
    CERTIFICATION
  EXHIBIT 32.1
    CERTIFICATION
  EXHIBIT 32.2
    CERTIFICATION