SEC File No. 70-10122




                       SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549




                             CERTIFICATE PURSUANT TO

                                     RULE 24

                            OF PARTIAL COMPLETION OF

                                  TRANSACTIONS




                                FirstEnergy Corp.




------------------------------------
                                    :
In the matter of                    :
FirstEnergy Corp.                   :        Certificate Pursuant
                                    :        to Rule 24 of Partial
                                    :        Completion of
                                    :        Transactions
                                    :
SEC File No. 70-10122               :
(Public Utility Holding Company Act :
of 1935)                            :
------------------------------------


TO THE MEMBERS OF THE SECURITIES AND EXCHANGE COMMISSION:

        The  undersigned,   FirstEnergy  Corp.  (FirstEnergy)  hereby  certifies
pursuant  to Rule 24 of the  Rules and  Regulations  under  the  Public  Utility
Holding Company Act of 1935 (the Act), that certain of the transactions proposed
in the Applications,  as filed in SEC File No. 70-10122 have been carried out in
accordance with the Commission's Orders dated June 30, 2003 as follows:

1.      Balance  Sheets and Income  Statements  for the  FirstEnergy  Nonutility
        Holding Company and its consolidated  Subsidiaries for the quarter ended
        June 30, 2003 are attached as following exhibits:

        Exhibit
        -------
        1-1     Consolidated  Balance Sheet and Income  Statement of FirstEnergy
                Ventures Corp.
        1-2     Consolidated  Balance Sheet and Income  Statement of FirstEnergy
                Facilities Services Group, LLC.
        1-3     Balance Sheet and Income Statement of OES Ventures, Inc. - filed
                pursuant to request for confidential treatment.
        1-4     Balance Sheet and Income  Statement of Centerior  Communications
                Holdings,  Inc. - filed  pursuant  to request  for  confidential
                treatment.
        1-5     Consolidated   Balance   Sheet  and  Income   Statement  of  E-L
                Enterprises,  Inc. - filed pursuant to request for  confidential
                treatment.
        1-6     Consolidated  Balance  Sheet  and  Income  Statement  of  MARBEL
                HoldCo,  Inc.  - filed  pursuant  to  request  for  confidential
                treatment.

        Balance Sheet and Income  Statement of GPU Diversified  Holdings LLC are
        reported on Form U-9C-3.

2.      During the period  April 1, 2003  through  June 30,  2003,  there was no
        Development  Activity.  Investments  made during the second quarter 2003
        are as follows:

        Category                                      Investment
        --------                                    --------------
                                                   (In Thousands $)

        Energy Related Company                         $1,000

3.      During the  second  quarter of 2003,  there were no  guarantees  made on
        behalf  of other  direct or  indirect  Subsidiaries  of the  FirstEnergy
        Nonutility Holding Companies.


4.      During the second  quarter of 2003,  there were no services  obtained by
        the FirstEnergy Nonutility Holding Companies,  or any direct or indirect
        Subsidiary  of  the  Nonutility   Holding  Companies  from  the  Utility
        Subsidiaries.

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5.      A  chart  of  the  nonutility  businesses,  financing  subsidiaries  and
        nonsystem  securities  in which  FirstEnergy  and its  subsidiaries  are
        engaged  in or have  investments  in of 10% or  greater  are  identified
        below:



                                                                                     Type of
                                                                                     Type of
Name of Company                                                                     Subsidiary                % Ownership
---------------                                                                     ----------                -----------

                                                                                                             
American Transmission Systems, Incorporated (ATSI)                                      US                         100
Centerior Service Company (Inactive)                                                                               100
FE Acquisition Corp. (Inactive)                                                         NUHC                       100
    Mid-Atlantic Energy Development Co. (Inactive)                                                                 100
FE Holdings, L.L.C. (Inactive)                                                                                       -
FELHC, Inc.                                                                             ERC                        100
First Communications, LLC                                                               ETC                        65
FirstEnergy Facilities Services Group, LLC (FEFSG)                                      NUHC                       100
    Ancoma, Inc.                                                                        ERC                        100
    Dunbar Mechanical, Inc.                                                             ERC                        100
    Edwards Electrical & Mechanical, Inc.                                               ERC                        100
    Elliott-Lewis Corporation                                                           ERC                        100
       A.A. Duckett, Inc. ERC 100 E-L Enterprises, Inc. NUHC 100
         Modern Air Conditioning, Inc.                                                  ERC                        100
           Airdex Air Conditioning Corporation                                          ERC                        100
         R.L. Anderson, Inc. ERC 100 Sautter Crane Rental, Inc. ERC 100
    The Hattenbach Company                                                              ERC                        100
    L.H. Cranston and Sons, Inc.                                                        ERC                        100
    Roth Bros., Inc.                                                                    ERC                        100
    R.P.C. Mechanical, Inc.                                                             ERC                        100
    Spectrum Controls Systems                                                           ERC                        100
FirstEnergy Nuclear Operating Company (FENOC)                                           ERC                        100
FirstEnergy Properties, Inc. (FirstEnergy Properties)                                   RES                        100
    BSG Properties, Inc. (Inactive)                                                     RES                        100
FirstEnergy Securities Transfer Company                                                 FS                         100
FirstEnergy Service Company (FECO)                                                      ERC                        100
FirstEnergy Solutions Corp. (FES)                                                       ERC                        100
    FirstEnergy Generation Corp. (GenCo)                                                EWG                        100
    FirstEnergy Engineering, Inc.                                                       ERC                        100
FirstEnergy Ventures Corp. (FirstEnergy Ventures)                                       NUHC                       100
    Advanced Technologies Development Corp.                                             ETC                        100
    Bay Shore Power Company                                                             ERC                        100
    Centerior Communications Holdings, Inc.                                             NUHC                       100
       Fiber Venture Equity, Inc. (Inactive)                                            ETC                        100
       AFN Finance Company No. 3, LLC                                                   ETC                        100
    Centerior Energy Services, Inc.                                                     ERC                        100
    Centerior Power Enterprises, Inc. (Inactive)                                                                   100
    Engineered Processes, Ltd.                                                          ERC                        50
    Eastroc Technologies, LLC                                                           ERC                        50
    FirstEnergy Telecommunications Corp.                                                ETC                        100
    Warrenton River Terminal, Ltd.                                                      ERC                        100

                                       2






                                                                                     Type of
Name of Company                                                                     Subsidiary                % Ownership
---------------                                                                     ----------                -----------

                                                                                                             
GPU Capital, Inc. (GPU Capital)                                                         FUCO                       100
    GPU Electric, Inc. (GPU Electric)                                                   FUCO                       100
      GPU Argentina Services S.R.L.                                                     FUCO                       100
      GPU Australia Holdings, Inc.                                                      FUCO                       100
        Austran Holdings, Inc.                                                          FUCO                       100
      GPU International Australia Pty Ltd.                                              FUCO                       100
      EI UK Holdings, Inc.                                                              FUCO                       100
          Aquila Sterling Holdings LLC                                                  FUCO                       20.1*
          Aquilla Sterling LTD                                                          FUCO                       100
             Avon Energy Partners Holdings                                              FUCO                       100
                 Midlands Electricity plc                                               FUCO                       100
GPU Diversified Holdings LLC (GPUDH)                                                    NUHC                       100
    GPU Solar, Inc.                                                                     ERC                        50
    GPU EnerTech Holdings, Inc.                                                         ERC                        100
    GPU Distributed Power, Inc.                                                         ERC                        100
GPU Nuclear, Inc. (GPUN)                                                                ERC                        100
    Private Fuel Storage LLC                                                            ERC                        10.1
GPU Power, Inc. (GPU Power)                                                             EWG                        100
    Barranquilla Lease Holding, Inc.                                                    EWG                        100
      Los Amigos Leasing Company, Ltd.                                                  EWG                        100
    EI Barranquilla, Inc.                                                               EWG                        100
      Termobarranquilla, S.A.                                                           EWG                        28.67
    EI Canada Holding Limited                                                           EWG                        100
      EI Services Canada Limited                                                        EWG                        100
      EI Brooklyn Power Limited                                                         EWG                        100
        EI Brooklyn Investments Limited                                                 EWG                        100
    EI International                                                                    EWG                        100
      GPUI Colombia, Ltda.                                                              EWG                        100
    GPU Power Philippines, Inc.                                                         EWG                        100
      Magellan Utilities Development Corporation                                        EWG                        40
    Guaracachi America, Inc.                                                            EWG                        100
      Empresa Guaracachi S.A.                                                           EWG                        50
    International Power Advisors, Inc.                                                  EWG                        100
    NCP Ada Power, Inc. (Inactive)**                                                    EWG                        100
    NCP Energy, Inc.**                                                                  EWG                        100
    Syracuse Orange Partners LP                                                         EWG                          -
GPU Telcom Services, Inc. (GPU Telcom)                                                  ETC                        100
Jersey Central Power & Light Company (JCP&L)                                            US                         100
    JCP&L Capital L.P.                                                                  FS                         100
    JCP&L Transition Funding, LLC                                                       FS                         100
    Saxton Nuclear Experimental Corporation                                             ERC                        44
MARBEL Energy Corporation (MARBEL)                                                      ERC                        100
    Marbel HoldCo, Inc.                                                                 NUHC                       100
      Great Lakes Energy Partners, LLC                                                  ERC                        50
Metropolitan Edison Company (Met-Ed)                                                    US                         100
    Met-Ed Preferred Capital II, Inc.                                                   FS                         100
      Met-Ed Capital II, L.P.                                                           FS                         100
        Met-Ed Capital Trust                                                            FS                         100
    Saxton Nuclear Experimental Corporation                                             ERC                        32
    York Haven Power Company                                                            US                         100

                                       3






                                                                                      Type of
Name of Company                                                                      Subsidiary                % Ownership
---------------                                                                      ----------                -----------

                                                                                                             
MYR Group Inc. (MYR)                                                                    ERC                        100
    The L. E. Myers Company                                                             ERC                        100
    Hawkeye Construction, Inc.                                                          ERC                        100
    MYRcom, Inc.                                                                        ERC                        100
    MYRpower, Inc.                                                                      ERC                        100
    Great Southwestern Construction, Inc.                                               ERC                        100
    Harlan Electric Company                                                             ERC                        100
      Sturgeon Electric Company, Inc.                                                   ERC                        100
      ComTel Technology, Inc.                                                           ERC                        100
    Power Piping Company                                                                ERC                        100
    D.W.Close Company, Inc.                                                             ERC                        100
Pennsylvania Electric Company (Penelec)                                                 US                         100
    Nineveh Water Company                                                               ERC                        100
    Penelec Preferred Capital II, Inc.                                                  FS                         100
      Penelec Capital II, L.P.                                                          FS                         100
        Penelec Capital Trust                                                           FS                         100
    Saxton Nuclear Experimental Corporation                                             ERC                        24
    The Waverly Electric Light and Power Company                                        US                         100
Ohio Edison Company (OE)                                                                US                         100
    OES Capital, Inc.                                                                   FS                         100
    OES Finance, Inc.                                                                   FS                         100
    OES Nuclear, Inc.                                                                   FS                         100
    OES Ventures, Inc.                                                                  NUHC                       100
    Ohio Edison Financing Trust                                                         FS                         100
    Ohio Edison Financing Trust II (Inactive)                                           FS                         100
    Pennsylvania Power Company (Penn)                                                   US                         100
      Cranberry Square Associates, L.P.                                                 RES                        50
    McDonald Corporate Tax Credit Fund Limited Partnership                              RES                        12.37
    McDonald Ohio Tax Credit Fund-1996 Limited Partnership                              RES                        42.13
    McDonald Ohio Tax Credit Fund-1998 Limited Partnership                              RES                        30.94
    Apollo Tax Credit Fund III, L.P.                                                    RES                        33.33
    Apollo Tax Credit Fund IX, L.P.                                                     RES                        99.99
    Boston Capital Corporate Tax Credit Fund X, L.P.                                    RES                        10.93
    Boston Capital Corporate Tax Credit Fund XIV, L.P.                                  RES                        14
    Boston Capital Corporate Tax Credit Fund XVII, L.P.                                 RES                        99
    Marion Senior Housing Limited Partnership                                           RES                        29.21
The Cleveland Electric Illuminating Company (CEI)                                       US                         100
    Cleveland Electric Financing Trust I                                                FS                         100
    Centerior Funding Corporation                                                       FS                         100
    The Toledo Edison Capital Corporation                                               FS                         10
The Toledo Edison Company (TE)                                                          US                         100
    The Toledo Edison Capital Corporation                                               FS                         90
AFN Finance Company No. 1, LLC                                                          ETC                        100
Kinetic Ventures I, LLC                                                                 ERC                        11.11
Kinetic Ventures II, LLC                                                                ERC                        14.28
PowerSpan Corp.                                                                         ERC                        18.63
The Alliance Participants Administrative and Startup
    Activities Company, LLC                                                             ERC                        10
UMICO Holdings, Inc. (Inactive)                                                                                    36

*  EI UK Holdings, Inc. owns 50% voting (20.1% economic) interest in Aquila Sterling Holding LLC.

** Denotes Provisional Dissolution - pending tax clearance from the State of Incorporation.

                                       4





ERC      -      Energy Related Activity
ETC      -      Exempt Telecommunications Company
EWG      -      Exempt Wholesale Generator
FS       -      Financing Subsidiary
FUCO     -      Foreign Utility Company
NUHC     -      Nonutility Holding Company
RES      -      Real Estate
US       -      Utility Subsidiary


6.      During the second quarter of 2003,  there were no securities  (including
        guarantees)  issued by the FirstEnergy  Nonutility Holding Companies and
        each  Non-Exempt  Subsidiary  pursuant  to  Rule 52 or  Rule  45(b),  as
        applicable.

7.      During the  second  quarter of 2003,  there were no  Anticipatory  Hedge
        transactions entered into by any FirstEnergy Nonutility Holding Company,
        or any  direct  or  indirect  Non-Exempt  Subsidiary  of the  Nonutility
        Holding Company.

                                       5




                                    SIGNATURE


        The  undersigned   registered  holding  company  has  duly  caused  this
quarterly report to be signed on its behalf by the undersigned officer thereunto
duly  authorized  pursuant to the  requirements  of the Public  Utility  Holding
Company Act of 1935.



                                             FIRSTENERGY CORP.



August 29, 2003
                              By:          /s/ Harvey L. Wagner
                                    ---------------------------------
                                               Harvey L. Wagner
                                         Vice President, Controller
                                        and Chief Accounting Officer
                                        (Principal Accounting Officer)

                                       6