POWER OF ATTORNEY


          Know  all persons by these present that the undersigned
hereby  constitutes  and  appoints each of  Rhonda  S.  Ferguson,
Jacqueline  S. Cooper and Edward J. Udovich, signing singly,  the
undersigned's true and lawful attorney-in-fact to:

          (1)   execute for and on behalf of the undersigned,  in
the  undersigned's  capacity  as an officer  and/or  director  of
FirstEnergy  Corp. and/or any of its subsidiaries and  affiliates
(referred to as the "Company"), as applicable, Forms 3, 4  and  5
in  accordance with Section 16(a) of the Securities Exchange  Act
of  1934,  as  amended ("Section 16") and Form 144  ("Form  144")
pursuant  to  Rule 144 under the Securities Act  of  1933  ("Rule
144") and the rules thereunder;

           (2)  do and perform any and all acts for and on behalf
of the undersigned that may be necessary or desirable to complete
and execute any such Forms 3, 4, 5 or 144 and file such form with
the  United  States  Securities and Exchange Commission  and  any
stock exchange or similar authority; and

          (3)   take  any other action of any type whatsoever  in
connection  with  the  foregoing which, in the  opinion  of  such
attorney-in-fact, may be of benefit to, in the best interest  of,
or  legally required by the undersigned; it being understood that
the  documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be  in  such
form  and  shall  contain  such  terms  and  conditions  as  such
attorney-in-fact   may   approve   in   such   attorney-in-fact's
reasonable discretion.

          The    undersigned   hereby   grants   to   each   such
attorney-in-fact full power and authority to do and  perform  any
and  every  act  and  thing whatsoever requisite,  necessary,  or
proper to be done in the exercise of any of the rights and powers
herein  granted,  as  fully to all intents and  purposes  as  the
undersigned  might or could do if personally present,  with  full
power  of  substitution  or  revocation,  hereby  ratifying   and
confirming  all that such attorney-in-fact shall lawfully  do  or
cause  to  be  done by virtue of this power of attorney  and  the
rights and powers herein granted.

          The   undersigned  acknowledges  that   the   foregoing
attorneys-in-fact, in serving in such capacity at the request  of
the  undersigned, are not assuming, nor is the Company  assuming,
any  of the undersigned's responsibilities to comply with Section
16 or Rule 144.

          This  Power of Attorney shall remain in full force  and
effect  until  the  undersigned is no  longer  required  to  file
Forms  3, 4, 5 and 144 with respect to the undersigned's holdings
of  and  transactions in securities issued by the Company, unless
earlier revoked by the undersigned in a signed
writing    delivered    to   the   foregoing   attorneys-in-fact.
Additionally, this Power of Attorney revokes any and all previous
Power  of Attorney forms for this same purpose which was  entered
into by the undersigned.

           This  Power  of  Attorney shall  be  governed  by  and
construed  in  accordance with the law  of  the  State  of  Ohio,
regardless  of the law that might be applied under principles  of
conflict of laws.


          IN  WITNESS  WHEREOF, the undersigned has  caused  this
Power  of  Attorney to be executed as of this 27th  day  of  July
2007.





                                                  Mark T. Clark


Signed and acknowledged
in the presence of:




Stephanie J. Massi



Colin P. Binns


State of Ohio       )
               )  ss:
County of Summit    )


          The foregoing Power of Attorney was acknowledged before
me this 27th day of July 2007 by Mark T. Clark.




        Susie M. Hoisten, Notary Public
          Residence - Summit County
         State Wide Jurisdiction, Ohio
     My Commission Expires December 9, 2011