(As filed on June 20, 2003)
                                                             File No. 70-[_____]


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM U-1
                           APPLICATION OR DECLARATION
                                    UNDER THE
                   PUBLIC UTILITY HOLDING COMPANY ACT OF 1935

                                FIRSTENERGY CORP.
                              76 South Main Street
                                Akron, Ohio 44308

                    (Names of companies filing this statement
                  and addresses of principal executive offices)
              _____________________________________________________

                                      NONE

 (Name of top registered holding company parent of each applicant or declarant)
             _______________________________________________________


            Leila L. Vespoli                  Douglas E. Davidson, Esq.
        Senior Vice President And             Thelen Reid & Priest LLP
             General Counsel                      875 Third Avenue
            FirstEnergy Corp.                 New York, New York 10022
          76 South Main Street
            Akron, Ohio 44308

                   (Names and addresses of agents for service)
            ________________________________________________________





ITEM 1.   DESCRIPTION OF PROPOSED TRANSACTION.
          -----------------------------------

          A.   Background.
               ----------

          FirstEnergy Corp., a registered holding company (the "Applicant"),
herein requests approval from the Commission pursuant to Sections 9(a)(1) and 10
of the Public Utility Holding Company Act of 1935, as amended (the "Act") to
acquire a membership interest in PowerTree Carbon Company, LLC (the "Company"),
a Delaware limited liability company formed to facilitate investments by the
Applicant and other energy companies in forestation projects in the Lower
Mississippi River Valley, and possibly other sites, as a means for removing
carbon dioxide (CO2) from the atmosphere. The Applicant proposes to acquire such
membership interest either directly or indirectly through one or more
subsidiaries, including a new subsidiary formed exclusively for the purpose of
acquiring and holding the membership interest.

          The Applicant directly or indirectly owns all of the outstanding
common stock of ten electric utility subsidiaries, Ohio Edison Company, The
Cleveland Electric Illuminating Company, The Toledo Edison Company, American
Transmission Systems, Incorporated, Jersey Central Power & Light Company,
Pennsylvania Electric Company, Metropolitan Edison Company, Pennsylvania Power
Company, York Haven Power Company, and The Waverly Electric Power & Light
Company, which together provide service to approximately 4.3 million retail and
wholesale electric customers in a 37,200 square-mile area in Ohio, New Jersey,
New York and Pennsylvania; and one gas utility subsidiary, Northeast Ohio
Natural Gas Corp., which provides gas distribution and transportation service to
approximately 5,000 customers in central and northeast Ohio. These companies are
referred to herein collectively as the "Utility Subsidiaries." Certain of the
Utility Subsidiaries own all or portions of the units at 16 electric generating
stations in the United States having a combined generating capability of
approximately 13,387 megawatts (MW).

          The Company has been formed under the sponsorship of the electric
utility sector in cooperation with the Department of Energy ("DOE"). The Company
is part of an industry-wide effort to voluntarily address climate change through
measures designed to reduce greenhouse gas emissions in response to President
Bush's recent "Climate VISION" plan, or Climate, Voluntary Innovative Sector
Initiatives: Opportunities Now. Climate VISION is the first step in the
President's policy of encouraging industry to produce voluntary cuts in
greenhouse gas emissions. One proven means for reducing greenhouse gases is to
use trees to remove CO2 from the atmosphere and store it in tree biomass and
roots and soil. The Bush Administration has also proposed, as part of its Global
Climate Change program, the creation of transferable credits for measures which
reduce greenhouse gas emissions.

          The Company has obtained commitments totaling approximately $3.5
million from approximately 25 electric utilities, electric utility holding
companies and other energy concerns that will be used to fund six forestation
projects located in Louisiana, Mississippi and Arkansas. These projects will
provide multiple environmental benefits, including removing from the atmosphere
and storing over 2 million tons of CO2 over the projects' 100-year lifetimes.
Other benefits will include: restoring habitat for birds and animals; reducing
fertilizer inputs to waters; and stabilizing soils. Two of the projects will
involve purchase and donation of land to the U.S. Fish & Wildlife Service, while


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other projects will involve obtaining easements for tree planting on private
land. The contributions of the members to the Company will be utilized for land
acquisition and to pay the cost of planting tree seedlings. It is estimated that
these projects will provide carbon benefits of more than 400 and 450 tons of CO2
per acre by years 70 and 100, respectively, at a cost of less that $2.00 per
ton.

          Unlike some earlier forestation projects that U.S. electricity
generators have supported in the past, the Company is being formed as a
for-profit limited liability company ("LLC"), which it is believed will allow
carbon or CO2 reduction credits, if and when they become available, to be more
readily transferred. The LLC structure will also allow the members of the
Company to take advantage of tax benefits of land donation. Nevertheless,
although formed as a for-profit LLC, the Company is essentially a passive medium
for making investments in projects that are not expected to have any operating
revenues, and will not engage in any active business operations.

          To the extent not exempt under Rule 43, the Applicant is also
requesting authorization pursuant to Section 12(f) of the Act to sell all or a
portion of its membership interest in the Company at any time to any of its
associate companies. Any sale by the Applicant of its membership interest in the
Company to an associate company shall be for an amount equal to the Applicant's
investment or pro rata share thereof in the case of a sale of a portion of the
Applicant's membership interest. No sale to an associate company that requires
approval by any other regulatory commission shall take place until such approval
has been obtained.

          B.   Capital Contribution Commitments of Initial Members.
               ---------------------------------------------------

          The Applicant is one of eleven registered holding companies that have
committed, either directly or through subsidiaries, to make capital
contributions to the Company. The others are Ameren Corporation, American
Electric Power Company, Inc., Cinergy Corp., Dominion Resources, Inc., Entergy
Corporation, Exelon Corporation, Great Plains Energy Incorporated, PEPCO
Holdings, Inc., Progress Energy, Inc., and Xcel Energy, Inc. Other energy
companies that have committed to make capital contributions are: CLECO
Corporation, The Detroit Edison Company, Duke Energy Corporation, Minnesota
Power (a division of ALLETE, Inc.), OGE Energy Corp., Oglethorpe Power
Corporation, Peabody Energy Corporation, Pinnacle West Capital Corporation,
Public Service Electric and Gas Company, Public Service Company of New Mexico,
Reliant Resources, Inc., Tennessee Valley Authority, TXU Corp., We Energies (the
trade name of Wisconsin Electric Power Company and Wisconsin Gas Company), and
Wisconsin Public Service Corporation. The amount of the commitments of the
eleven registered holding companies is as follows:

     --------------------------------------------------------------------
     Name of Registered Holding          Total Capital Contribution
     Company                             Commitment
     --------------------------------------------------------------------
     Ameren Corp.                        $100,000
     --------------------------------------------------------------------
     American Electric Power Co.         $300,000
     --------------------------------------------------------------------
     Cinergy Corp.                       $100,000
     --------------------------------------------------------------------
     Dominion Resources, Inc.            $100,000
     --------------------------------------------------------------------
     Entergy Corp.                       $100,000
     --------------------------------------------------------------------


                                       3



     --------------------------------------------------------------------
     Exelon Corp.                        $100,000
     --------------------------------------------------------------------
     FirstEnergy Corp.                   $100,000
     --------------------------------------------------------------------
     Great Plains Energy Inc.            $ 50,000
     --------------------------------------------------------------------
     PEPCO Holdings, Inc.                $ 50,000
     --------------------------------------------------------------------
     Progress Energy, Inc.               $100,000
     --------------------------------------------------------------------
     Xcel Energy, Inc.                   $100,000
     --------------------------------------------------------------------
                               Total     $1,200,000
     --------------------------------------------------------------------

          In the aggregate, the capital contribution commitments of the eleven
registered holding companies represent approximately 35% of the commitments of
all of the initial members.

          C.   Principal Terms of Operating Agreement.
               --------------------------------------

          Under the Company's Operating Agreement (Exhibit A hereto), the
business and affairs of the Company shall be managed by its Board of Managers.
Each member that commits to make a capital contribution of at least $100,000 is
entitled to appoint one representative to the Board of Managers. In general,
actions by the Board of Managers may be taken by a majority of the managers
present at a meeting. However, certain actions of the Board of Managers or of
any individual manager or any officer require authorization by a two-thirds vote
of the full board. These include, among others actions: the sale, exchange or
other disposition of any of the assets of the Company greater that $20,000 in
value; the commencement of a voluntary bankruptcy proceeding; the declaration or
making of any distributions to members; the incurrence of any indebtedness by
the Company; capital expenditures exceeding $20,000; and the acquisition or
lease of any real property and any sale of, donation, lease or sublease
affecting real property owned by the Company.

          New members may be admitted to the Company only upon the unanimous
approval of the then existing members. Upon admission of any new member, the
percentage interests of existing members shall be reduced accordingly. A member
may transfer all or a portion of its membership interest only upon receiving
approval of two-thirds of the existing members, except that, without the prior
approval of the other members, a member may transfer all or a part of its
membership interest to an affiliate of such member or to any other member. A
two-thirds vote of the members is also required for the election of officers of
the Company. The members have equal voting rights, regardless of their
percentage interests in the Company.

          The Operating Agreement provides that, so long as any member is a
registered holding company or subsidiary company thereof, any voting rights in
the Company received or otherwise obtained by such member equal to or exceeding
10% of the total outstanding voting rights in the Company shall be automatically
(and without any requirement for consent on the part of the affected member)
allocated to the other members in equal portions such that no registered holding
company member will hold 10% or more of voting rights in the Company. In
addition, any member may elect to limit its voting rights to less than 5% of the
total voting rights in the Company, in which case the voting rights of such
member or members equal to or exceeding 5% of the total voting rights in the
Company would be automatically allocated in equal portions to the other members.


                                       4



          The Operating Agreement further provides that each member (or its
designee(s) or transferee(s)) shall be entitled to claim a pro rata share of all
carbon that is determined to be sequestered by the Company's efforts to which
legal rights, if any, have been obtained ("Carbon Reductions") based on the
member's percentage interest in the Company. A member may generally utilize such
member's share of any Carbon Reductions in connection with its participation in
any greenhouse gas reporting or regulatory program or transfer or assign such
Carbon Reductions to one or more other persons.

ITEM 2.   FEES, COMMISSIONS AND EXPENSES.
          ------------------------------

          The fees, commissions and expenses incurred or to be incurred in
connection with the preparation and filing of this Application/Declaration are
estimated not to exceed $2,000.

ITEM 3.   APPLICABLE STATUTORY PROVISIONS.
          -------------------------------

          A.   General.
               -------

          Sections 9(a)(1) and 10 of the Act are applicable to the proposed
acquisition of a membership interest in the Company, as well as to the
acquisition of the securities of any new subsidiary formed exclusively for the
purpose of acquiring and holding the membership interest. The subsequent sale of
all or a portion of the membership interest in the Company acquired by the
Applicant to any associate company thereof is subject to Section 12(f) of the
Act, but may be exempt under Rule 43.

          B.   Standards of Sections 9(a) and 10.
               ---------------------------------

          The transaction proposed herein involves an acquisition of securities,
as well as an acquisition of an interest in an other (i.e., non-utility)
business, and is therefore subject to the approval of this Commission under
Section 10. The relevant standards for approval under Section 10 are set forth
in subsections (b), (c) and (f). As applied to interests in non-utility
businesses, Section 10(c)(1) of the Act provides that the Commission shall not
approve an acquisition that is "detrimental to the carrying out of the
provisions of section 11." Section 11(b)(1), in turn, directs the Commission to
limit the operations of a holding company system to a single integrated
public-utility system and such non-utility businesses as are "reasonably
incidental, or economically necessary or appropriate to the operations" of its
integrated system or systems. The Commission and the courts have interpreted
these provisions as expressing a Congressional policy against non-utility
activities that bear no operating or functional relationship to the utility
operations of the registered system.(1)

          The Commission has previously authorized new registered holding
companies to retain, under the standards of Section 11(b)(1), interests in
ventures formed to invest in start-up companies that offer products or services
that will generate greenhouse gas emission reductions for submission to the DOE

----------

(1)  See Michigan Consolidated Gas Co., 44 S.E.C. 361, 363-365 (1970), aff'd 444
F.2d 913 (D.C.Cir.1971).


                                       5



as "Climate Challenge" credits pursuant to Title XVI of the Energy Policy Act of
1992.(2) Further, under Rule 58(b)(1)(ii), a registered holding company may,
without the need for prior approval by the Commission (subject to certain
investment limitations), acquire the securities of companies that engage in the
"development and commercialization of electrotechnologies related to energy
conservation, storage and conversion, energy efficiency, waste treatment,
greenhouse gas reduction, and similar innovations." (Emphasis supplied)

          The Applicant's proposed investment in the Company is intended to
contribute positively to the national goal of reducing greenhouse gases through
voluntary industry specific efforts. The forestation projects that the Company
will fund have received strong backing from the DOE, Department of Agriculture
and Department of Interior. Moreover, the proposed investment in the Company
will provide the Applicant with a means to obtain carbon or CO2 reduction
credits, if and when such credits become available.

          C.   Compliance with Rule 54. The proposed transaction is also subject
to Rule 54. Rule 54 provides that, in determining whether to approve the issue
or sale of any securities for purposes other than the acquisition of any "exempt
wholesale generator" ("EWG") or "foreign utility company" ("FUCO") or other
transactions unrelated to EWGs or FUCOs, the Commission shall not consider the
effect of the capitalization or earnings of subsidiaries of a registered holding
company that are EWGs or FUCOs if the requirements of Rule 53(a), (b) and (c)
are satisfied. Under Rule 53(a), the Commission shall not make certain specified
findings under Sections 7 and 12 in connection with a proposal by a holding
company to issue securities for the purpose of acquiring the securities of or
other interest in an EWG, or to guarantee the securities of an EWG, if each of
the conditions in paragraphs (a)(1) through (a)(4) thereof are met, provided
that none of the conditions specified in paragraphs (b)(1) through (b)(3) of
Rule 53 exists.

          The Applicant currently meets all of the conditions of Rule 53(a),
except for clause (1). By order dated October 29, 2001, Holding Co. Act Release
No. 27459 (the "Merger Order"), the Commission, among other things, authorized
the Applicant to invest in EWGs and FUCOs so that the Applicant's "aggregate
investment," as defined in Rule 53(a)(1), in EWGs and FUCOs does not exceed $5
billion, which $5 billion amount is greater than the amount which would be
permitted by clause (1) of Rule 53(a) which, based on the Applicant's
consolidated retained earnings of $1.84 billion as of March 31, 2003, would be
$920 million. The Merger Order also specifies that this $5 billion amount may
include amounts invested in EWGs and FUCOs by the Applicant and GPU Inc.at the
time of the Merger Order ("Current Investments") and amounts relating to
possible transfers to EWGs of certain generating facilities owned by certain of
the Applicant's operating utilities ("GenCo Investments").

----------

(2)  See Exelon Corp., Holding Co. Act Release No. 27256 (Oct. 19, 2000); and
CP&L Energy, Inc., Holding Co. Act Release No. 27284 (Nov. 27, 2000).


                                       6



          As of March 31, 2003, and on the same basis as set forth in the Merger
Order, the Applicant's aggregate investment in EWGs and FUCOs was approximately
$1.31 billion,(3) an amount significantly below the $5 billion amount authorized
in the Merger Order. Additionally, as of March 31, 2003, consolidated retained
earnings were $1.84 billion. By way of comparison, the Applicant's consolidated
retained earnings as of December 31, 2001 were $1.52 billion.

          In any event, even taking into account the capitalization of and
earnings from EWGs and FUCOs in which the Applicant currently has an interest,
there would be no basis for the Commission to withhold approval of the
transactions proposed herein. With respect to capitalization, since the date of
the Merger Order, there has been no material adverse impact on the Applicant's
consolidated capitalization resulting from the Applicant's investments in EWGs
and FUCOs. As of December 31, 2002, the Applicant's consolidated capitalization
consisted of 33% common equity, 1.7% cumulative preferred stock, 1.9% subsidiary
- obligated mandatorily redeemable preferred securities, 58.3% long-term debt
and 5.1% notes payable. As of December 31, 2001, those ratios were as follows:
30.3% common equity, 3.1% cumulative preferred stock, 2.2% subsidiary-obligated
mandatorily redeemable preferred securities, 60.9% long term debt and 3.5% notes
payable. Additionally, the proposed transactions will not have any material
impact on the Applicant's capitalization. Further, since the date of the Merger
Order, the Applicant's investments in EWGs and FUCOs have contributed positively
to its level of earnings, other than for the negative impact on earnings due to
FirstEnergy's write downs of certain investments.(4)

          Further, since the date of the Merger Order, and, after taking into
account the effects of the Merger, there has been no material change in the
Applicant's level of earnings from EWGs and FUCOs.

          The Utility Subsidiaries are financially sound companies as indicated
by their investment grade ratings from the nationally recognized rating agencies
for their senior unsecured debt. The following chart includes a breakdown of the
senior, unsecured credit ratings for those Utility Subsidiaries that have
ratings:

----------

(3)  This $1.31 billion amount represents Current Investments only. As of March
31, 2003, the Applicant had no Genco Investments.

(4)  At the time of the Merger Order, the Applicant identified certain former
GPU EWG and FUCO investments for divestiture within one year. Among those
identified were Avon Energy Partners Holdings ("Avon"), a holding company for
Midlands Electricity plc, an electric distribution business in the United
Kingdom and GPU Empresa Distribuidora Electrica Regional S.A. and affiliates
("Emdersa"), an electric distribution business in Argentina. In May 2002, the
Applicant sold 79.9% of its interest in Avon, and in the fourth quarter of 2002,
recorded a $50 million charge ($32.5 million net of tax) to reduce the carrying
value of its remaining 20.1% interest. Additionally, the Applicant did not reach
a definitive agreement to sell Emdersa as of December 31, 2002, and therefore,
the Emdersa assets could no longer be treated as "assets pending sale" on the
Applicant's consolidated balance sheets. On November 1, 2002, the Applicant
began consolidating the results of Emdersa's operations in its financial
statements. In the fourth quarter of 2002, the Applicant recorded a one-time,
after-tax charge of $88.8 million (comprised of $104.1 million in currency
transaction losses arising principally from U.S. dollar denominated debt, offset
by $15.3 million of operating income). In addition to the currency transaction
losses, the Applicant recognized a currency translation adjustment in other
comprehensive income of $91.5 million as of December 31, 2002. These accounting
charges, in the aggregate, resulted in a $212.8 million decrease in the
Applicant's consolidated capitalization of $21.55 billion as of December 31,
2002, which amount includes short-term borrowings.


                                       7



     Subsidiary               Standard & Poors(5)    Moody's(6)    Fitch(7)

     Ohio Edison              BBB-                   Baa2          ---
     Cleveland Electric       BBB-                   Baa3          ---
     Toledo Edison            BBB-                   Baa3          BB
     Penn Power               BBB-                   Baa2          ---
     JCP&L                    BBB                    ---           ---
     Met-Ed                   BBB                    ---           ---
     Penelec                  BBB                    A2            BBB+

          The Applicant satisfies all of the other conditions of paragraphs (a)
and (b) of Rule 53. With respect to Rule 53(a)(2), the Applicant maintains books
and records in conformity with, and otherwise adheres to, the requirements
thereof. With respect to Rule 53(a)(3), no more than 2% of the employees of the
Applicant's domestic public utility companies render services, at any one time,
directly or indirectly, to EWGs or FUCOs in which the Applicant directly or
indirectly holds an interest. With respect to Rule 53(a)(4), the Applicant will
continue to provide a copy of each application and certificate relating to EWGs
and FUCOs and relevant portions of its Form U5S to each regulator referred to
therein, and will otherwise comply with the requirements thereof concerning the
furnishing of information. With respect to Rule 53(b), none of the circumstances
enumerated in subparagraphs (1), (2) and (3) thereunder have occurred.

ITEM 4.   REGULATORY APPROVAL.
          -------------------

          No state commission, and no federal commission, other than this
Commission, has jurisdiction over the proposed transaction.

ITEM 5.   PROCEDURE.
          ---------

          The Commission is requested to publish a notice under Rule 23 with
respect to the filing of this Application/Declaration as soon as practicable.
The Applicant requests that the Commission's order be issued as soon as
practicable after the notice period and in any event not later than July 31,
2003 in order to accommodate the initial call of capital contributions by the
Company. The Applicant further requests that there should not be a 30-day
waiting period between issuance of the Commission's order and the date on which
the order is to become effective, hereby waives a recommended decision by a
hearing officer or any other responsible officer of the Commission, and consents
to the assistance of the Division of Investment Management in the preparation of
the Commission's decision and/or order, unless the Division of Investment
Management opposes the matters proposed herein.

----------

(5)  Standard & Poor's Rating Services

(6)  Moody's Investors Service, Inc.

(7)  Fitch, Inc.


                                       8



ITEM 6.   EXHIBITS AND FINANCIAL STATEMENTS.

          A.   Exhibits.
               --------

               A    -    Draft of Operating Agreement of PowerTree Carbon
                         Company, LLC

               B    -    None

               C    -    Inapplicable

               D    -    None

               E    -    Inapplicable

               F-1  -    Opinion of Counsel for the Applicant.

               F-2  -    Opinion of Morris, James, Hitchens & Williams LLP.

               G    -    Form of Federal Register Notice

          B.   Financial Statements.
               --------------------

               (Deemed unnecessary because of the de minimis nature of the
               proposed transaction)

ITEM 7.   INFORMATION AS TO ENVIRONMENTAL EFFECTS.
          ---------------------------------------

          None of the matters that are the subject of this
Application/Declaration involves a "major federal action" nor do such matters
"significantly affect the quality of the human environment" as those terms are
used in section 102(2)(C) of the National Environmental Policy Act. The
transaction that is the subject of this Application/Declaration will not result
in changes in the operation of the Applicant that will have an impact on the
environment. The Applicant is not aware of any federal agency that has prepared
or is preparing an environmental impact statement with respect to the
transaction that is the subject of this Application/Declaration.


                                       9



                                    SIGNATURE

          Pursuant to the requirements of the Public Utility Holding Company Act
of 1935, the undersigned company has duly caused this statement to be signed on
its behalf by the undersigned thereunto duly authorized.

                                         FIRSTENERGY CORP.

                                         By: /s/ Harvey L. Wagner
                                                 ----------------
                                         Name:   Harvey L. Wagner
                                         Title:  Vice President and Controller


Date: June 20, 2003


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