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 amended,  filed in SEC File No. 70-10122 have been carried out
in accordance with the Commission's Order dated June 30, 2003 as follows:

(1)   During the period April 1, 2004 through June 30, 2004, there were no sales
of common stock or preferred securities by FirstEnergy.

(2)   During  the second  quarter of 2004, 315,332  shares of common  stock were
issuable  pursuant to options granted under employee  benefit plans and dividend
reinvestment plans.

(3)   During  the period  April 1, 2004  through  June 30, 2004, no  FirstEnergy
common  stock was  transferred  to a seller  of  securities  of a company  being
acquired.

(4)   During  the  period  April 1, 2004 through  June 30,  2004,  there were no
Long-term  Debt and  Preferred  Securities  issued by  FirstEnergy.  FirstEnergy
issued the following Short-term Debt during the second quarter of 2004:

             Transaction   Maturity             Transaction
                Date         Date      Rate       Amount          Loan Balance
             --------      --------    ----    ------------       ------------

CitiBank (FirstEnergy Revolver - 500mm 3 Year Facility)
-------------------------------------------------------
FirstEnergy   4/16/2004   4/23/2004    2.58%   $100,000,000.00   $200,000,000.00
FirstEnergy   4/20/2004   4/27/2004    2.58%    $50,000,000.00   $250,000,000.00



(5)   During the period  April 1, 2004  through  June 30,  2004,  the  following
short-term debt was issued by the Utility Subsidiaries:

             Transaction   Maturity            Transaction
                Date         Date      Rate       Amount          Loan Balance
             --------      --------    ----    ------------       ------------

CitiBank (Ohio Edison Company (OE) Revolver)
--------------------------------------------
OE            6/2/2004    6/9/2004     2.25%   $50,000,000.00    $50,000,000.00
OE            6/21/2004   6/22/2004    4.13%   $20,000,000.00    $20,000,000.00
OE            6/22/2004   6/23/2004    4.13%    $5,000,000.00     $5,000,000.00

                                       1




FirstMerit (OE Bi-Lateral Facility)
-----------------------------------
OE            4/2/2004    4/5/2004      1.75   $14,000,000.00    $14,000,000.00
OE            4/9/2004    4/13/2004     1.75    $7,500,000.00    $14,000,000.00
OE            6/21/2004   6/23/2004     1.75   $14,000,000.00    $14,000,000.00

KeyBank (OE Bi-Lateral Facility)
--------------------------------
OE            6/3/2004    6/4/2004      2.00    $2,000,000.00     $2,000,000.00
OE            6/21/2004   6/24/2004     2.00   $20,000,000.00    $20,000,000.00

Under the Utility Money Pool, the principal  balance of borrowings at the end of
the second  quarter of 2004 and average  interest rate during the second quarter
of 2004 are as follows:

          Regulated Money Pool                 Average            Principal
        Loan to/(Borrowing from):           Interest Rate           Balance
    -----------------------------------     -------------      ----------------
    OE                                        1.3862%          $   98,194,725
    Pennsylvania Power Company (Penn)         1.3862%             (33,710,464)
    The Cleveland Electric Illuminating
      Company (CEI)                           1.3862%             (97,417,896)
    The Toledo Edison Company (TE)            1.3862%            (238,893,199)
    American Transmission Systems,
      Incorporated (ATSI)                     1.3862%             111,509,053
    Jersey Central Power & Light
      Company (JCP&L)                         1.3862%            (158,793,303)
    Metropolitan Edison Company (Met-Ed)      1.3862%              27,477,270
    Pennsylvania Electric Company
      (Penelec)                               1.3862%             (87,916,243)
    York Haven Power Company                  1.3862%              12,060,565

(6)   During the second quarter of 2004, there were no financings consummated by
any Non-Utility subsidiary that were not exempt under rule 52.

(7)   During the second quarter of 2004,  the following guarantees  were made by
FirstEnergy to support  activities of its  subsidiaries:

                                                                  Purpose of
        Beneficiary                    Amount          Terms      Guarantee
        -----------                    ------          -----      ----------

        FirstEnergy Solutions Corp. (FES) (Trading - Electric)
        ------------------------------------------------------
        The Energy Authority        $1,000,000          (a)          (b)

        FES (Trading - Gas)
        -------------------
        Columbia Gas of Ohio         7,000,000          (a)          (b)

      (a)   Such  guarantees  are  issued for a  one-year  term,  with a ten-day
            termination right by FirstEnergy

      (b)   Parental  guarantees issued by FirstEnergy to provide credit support
            for electric power and natural gas purchases by subsidiary


                                       2



The following  Letters of Credits (LOC) were issued during the second quarter of
2004:

                                                                    Purpose of
      Beneficiary                                      Amount           LOC
      -----------                                      ------       -----------

      Penn
      ----
      US Department of Labor                       $   250,000          (a)
      Pennsylvania Dept of Environmental
        Protection Bureau of Land Recycling &
        Waste Management                               210,000          (b)

      FirstEnergy
      -----------
      PJM Interconnection, LLC                      19,900,000          (c)
      Deutsche Bank Trust Company Americas             400,000          (d)

      (a)   Collateral held for the Pennsylvania employees' Workers Compensation
            Program.
      (b)   Renewed  collateral for the  Harborcreek  Ash Disposal site in Erie,
            PA. Original LOC was issued in the fourth quarter 2002.
      (c)   Collateral for entering into purchase power agreements with PJM.
      (d)   Renewed  collateral  for  the  sale of the  Termobarranquilla,  S.A.
            facilities. Original LOC was issued in the fourth quarter 2003.

(8)   During the Second  Quarter of 2004, FirstEnergy  Corp. entered  into seven
(7) transactions designed to hedge the fair value of a portion of its fixed-rate
long-term  debt  portfolio  against  decreases  in  interest  rates.  The  hedge
structures are fixed - for - floating interest rate swaps,  whereby  FirstEnergy
Corp.  will receive  fixed  payments  equivalent to the fixed coupon rate of the
bond being  hedged,  and pay  floating  rate  payments  based on the 3-month and
6-month  London  Interbank  Offering  Rates  (LIBOR) plus or minus an applicable
spread. The debt instruments being hedged, notional amounts, counterparties, and
principal  terms of the fair value  hedges  are filed  pursuant  to request  for
confidential treatment.

(9)   Investments  made during  the second  quarter of 2004 in any  intermediate
subsidiary or financing subsidiary are as follows:

Company                                    Investment
-------                                    ----------
                                        (In Thousands $)

Centerior Funding Corp.                     $53,309
GPU Power, Inc.                             $16,032*

* Non cash goodwill adjustment relating to income tax reserves.


(10)  During the second  quarter of 2004 FirstEnergy  filed the following U-6B-2
forms:

Company                                  Filling Date
-------                                  ------------
Penelec                                  April 9, 2004
JCP&L                                    April 27, 2004

(11)  JCP&L engaged in jurisdictional financing  transactions  during the second
quarter of 2004. Consolidated balance sheets of JCP&L for the quarter ended June
30, 2004 are  incorporated by reference to JCP&L's Form 10-Q Quarterly Report to
SEC for the quarter ended June 30, 2004 (File No. 1-3141).

(12)  The following table presented in thousands, provides the capital structure
of FirstEnergy on a consolidated basis and each Utility Subsidiary as of the end
of the second quarter 2004.

                                       3



FirstEnergy                  Amount                  Ratio
-----------                ----------               ------
Common Equity              $8,432,963                41.67%
Preferred Stock               335,123                 1.66%
Long-Term Debt             11,393,700                56.30%
Short-Term Debt                74,436                 0.37%
                           ----------               ------
Total Capitalization      $20,236,222               100.00%
                           ----------               ------

OE
--
Common Equity              $2,576,620                59.35%
Preferred Stock               100,070                 2.30%
Long-Term Debt              1,559,754                35.93%
Short-Term Debt               105,061                 2.42%
                           ----------               ------
Total Capitalization       $4,341,505               100.00%
                           ----------               ------

CEI
---
Common Equity              $1,727,160                40.40%
Preferred Stock                96,404                 2.26%
Long-Term Debt              2,333,664                54.59%
Short-Term Debt               117,458                 2.75%
                           ----------               ------
Total Capitalization       $4,274,686               100.00%
                           ----------               ------

TE
--
Common Equity                $773,445                44.24%
Preferred Stock               126,000                 7.21%
Long-Term Debt                610,083                34.89%
Short-Term Debt               238,893                13.66%
                           ----------               ------
Total Capitalization       $1,748,421               100.00%
                           ----------               ------

Penn
----
Common Equity                $244,120                48.93%
Preferred Stock                39,105                 7.84%
Long-Term Debt                182,141                36.51%
Short-Term Debt                33,537                 6.72%
                           ----------               ------
Total Capitalization         $498,903               100.00%
                           ----------               ------

JCP&L
-----
Common Equity              $3,176,438                68.81%
Preferred Stock                12,649                 0.27%
Long-Term Debt              1,268,408                27.48%
Short-Term Debt               158,793                 3.44%
                           ----------               ------
Total Capitalization       $4,616,288               100.00%
                           ----------               ------

Met-Ed
------
Common Equity              $1,285,212                62.28%
Preferred Stock                  -                     -  %
Long-Term Debt                778,427                37.72%
Short-Term Debt                  -                     -  %
                           ----------               ------
Total Capitalization       $2,063,639               100.00%
                           ----------               ------

Penelec
-------
Common Equity              $1,295,799                65.75%
Preferred Stock                  -                     -  %
Long-Term Debt                588,867                29.88%
Short-Term Debt                86,146                 4.37%
                           ----------               ------
Total Capitalization       $1,970,812               100.00%
                           ----------               ------

                                       4



(13)  The following  table  presented in thousands  provides  retained  earnings
analysis of FirstEnergy on a consolidated  basis and each Utility  Subsidiary as
of the end of the second quarter 2004.


                                    FirstEnergy     OE        CEI         TE
                                    -----------   ------    -------   ---------
Balance, December 31, 2003          $1,604,385   $522,934  $494,212   $113,620
Net Income                             378,044    163,433    98,200     29,109
Cash Dividends on Preferred Stock            -    (1,220)    (3,496)    (4,423)
Cash Dividends on Common Stock        (243,786)  171,000)  (145,000)         -
Other                                        -          -         -          -
                                    ----------   --------  --------   --------
Balance, June 30, 2004              $1,738,643   $514,147  $443,916   $138,306
                                    ----------   --------  --------   --------


                                        Penn      JCP&L      Met-Ed   Penelec
                                        ----     --------  ---------  -------
Balance, December 31, 2003             $54,179   $ 22,132   $27,011   $18,038
Net Income                              37,614     50,234    24,709     8,708
Cash Dividends on Preferred Stock       (1,280)      (249)        -         -
Cash Dividends on Common Stock         (23,000)   (20,000)  (25,000)   (5,000)
Other                                        -          -         -         -
                                       -------   --------   -------   -------
Balance, June 30, 2004                 $67,513   $ 52,117   $26,720   $21,746
                                       -------   --------   -------   -------


(14)  During  the  Second  Quarter of 2004, there  was no  change to any  of the
credit ratings of  FirstEnergy  Corp. or any of its  subsidiaries  by any of the
nationally recognized credit rating agencies.

(15)  FirstEnergy's  aggregate  investment  includes  all amounts  invested,  or
commitments to be invested,  in exempt wholesale  generators  (EWGs),  for which
there is recourse,  directly or indirectly,  to the registered  holding company.
Accordingly,  FirstEnergy's  aggregate  investment  as of  June  30,  2004 is as
follows:

                                                (In Thousands)
                                                --------------

FE Generation Corp.                              $  923,167
Termobarranquilla S. A.                              60,400
                                                  ---------
         Aggregate Investment in EWGs            $  983,567*
                                                  =========

* Aggregate investment amounts reflected here include LOCs and guarantees, but
do not include any goodwill or other fair value adjustments.


Aggregate Investment as a Percentage of FirstEnergy and Subsidiary Companies:
-----------------------------------------------------------------------------

Total capitalization                    $ 20,236,222                   4.9%
Net utility plant                       $ 13,301,681                   7.4%
Total consolidated assets               $ 32,009,600                   3.1%
Market value of common equity           $ 12,339,175                   8.0%

(16)  Set forth  below is a summary  of the  direct or  indirect investments  as
defined in SEC Rule 53(a) by  FirstEnergy,  as of June 30, 2004 in EWGs, as well
as the percentage of equity ownership.

                                       5





                         First        First        Owners not affiliated with
                        Energy's     Energy's %           FirstEnergy
                       Investment     Equity       ----------------------------
Associate              at 06/30/04     Owner-                         Type of
 Company                 ($000)*        ship       Name of Entity      Entity
---------              -----------   ---------     ---------------    -------

Termobarranquilla        60,400          0%        ABB Energy         Foreign
S.A. (a)                                           Ventures, Inc.
                                                   Lancaster Steel    Foreign
                                                   Distral Group      Foreign
                                                   Corp. Electrica    Foreign
                                                   De la Costa
                                                   Atlantica
                                                   Darby Mazzanine
                                                   Holdings, LLC

FE Generation
Corp.                   923,167        100%        Not Applicable      N/A
                      ---------

Total Aggregate
Investment in
EWGs                 $  983,567
                      =========

(*)   Aggregate investmelected  here  include  LOCs and  guarantees,  but do not
include any goodwill or other fair value adjustments.

(a)   FirstEnergy sold Termobarranquilla S.A. on January 31, 2004. The remaining
investment represents outstanding LOCs issued by FirstEnergy.


(17)  FirstEnergy and Subsidiary Companies Consolidated Capitalization Ratios as
of June 30, 2004:


                                        Amount (000's)                  %
                                        --------------                -----

Common equity                           $  8,432,963                   41.7
Preferred stock not subject to               335,123                    1.6
    mandatory redemption
Long-term debt-
  Subordinated debentures to
    affiliated trusts                        103,093                    0.5
  Other                                   11,290,607                   55.8
Notes payable                                 74,436                    0.4
                                         -----------                  -----

         Total capitalization           $ 20,236,222                  100.0%
                                         ===========                  =====


(18)  Market-to-book  ratio of FirstEnergy and Subsidiary Companies common stock
at June 30, 2004:

Closing Market Price per Share                                     $ 37.41
Book Value per Share                                               $ 25.72
Market-to Book Ratio of Common Stock                                145.5%

(19)  No new  EWG/FUCO  project  covered by the  Modified  Rule 53 Test in which
Firstenergy has invested or committed to invest during the second quarter of
2004.


                                       6



(20)  Analysis of Growth in Retained  Earnings for  FirstEnergy  and  Subsidiary
Companies:

                                                           (In Thousands)
                                                           --------------

Retained Earnings as of 06/30/04                             $1,738,643
Retained Earnings as of 12/31/03                              1,604,385
                                                              ---------
Growth in Retained Earnings                                  $  134,258
                                                              =========

Analysis of Growth in Retained Earnings:
----------------------------------------

Income contribution from regulated utility companies         $  377,553
Income contribution from EWGs                                    72,078
Income contribution from all other companies                     31,797
FirstEnergy Holding and Service companies                      (103,384)
Cash dividends declared on common stock                        (243,786)
                                                              ---------
Growth in Retained Earnings                                  $  134,258
                                                              =========


(21) Statements of Operations for the period ended June 30, 2004 for FirstEnergy
Generation  Corp.  will be filed  separately  under a request  for  confidential
treatment under Rule 104 (b)

                                       7




                                    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 24, 2004
                                  By:          /s/ Harvey L. Wagner
                                        ------------------------------------
                                                   Harvey L. Wagner
                                             Vice President, Controller
                                            and Chief Accounting Officer
                                            (Principal Accounting Officer)

                                       8