File No. 70-8779



                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                       ---------------------------------

                         POST-EFFECTIVE AMENDMENT NO. 13
                                       TO
                                    FORM U-1
                      ----------------------------------

                           APPLICATION OR DECLARATION

                                    under the

                  PUBLIC UTILITY HOLDING COMPANY ACT OF 1935

                                     * * *

                      AMERICAN ELECTRIC POWER COMPANY, INC.
                    1 Riverside Plaza, Columbus, Ohio 43215

                  AMERICAN ELECTRIC POWER SERVICE CORPORATION
                    1 Riverside Plaza, Columbus, Ohio 43215

                            APPALACHIAN POWER COMPANY
                   40 Franklin Road, Roanoke, Virginia 24022

                         COLUMBUS SOUTHERN POWER COMPANY
                 215 North Front Street, Columbus, Ohio  43215

                         INDIANA MICHIGAN POWER COMPANY
                 One Summit Square, Fort Wayne, Indiana  46801

                             KENTUCKY POWER COMPANY
                 1701 Central Avenue, Ashland, Kentucky  41101

                             KINGSPORT POWER COMPANY
                 422 Broad Street, Kingsport, Tennessee  37660

                               OHIO POWER COMPANY
                339 Cleveland Avenue, S.W., Canton, Ohio  44702

                             WHEELING POWER COMPANY
               51 - 16th Street,  Wheeling, West Virginia 26003
              (Name of company or companies filing this statement
                 and addresses of principal executive offices)

                                     * * *
                      AMERICAN ELECTRIC POWER COMPANY, INC.
                     1 Riverside Plaza, Columbus, Ohio 43215
                     (Name of top registered holding company
                     parent of each applicant or declarant)

                                     * * *
                         Susan Tomasky, General Counsel
                   AMERICAN ELECTRIC POWER SERVICE CORPORATION
                    1 Riverside Plaza, Columbus, Ohio 43215
                    (Name and address of agent for service)

      American  Electric Power Company,  Inc.  ("American"),  a holding  company
registered  under the Public Utility  Holding  Company Act of 1935 ("1935 Act"),
and American  Electric  Power Service  Corporation,  Appalachian  Power Company,
Columbus  Southern  Power  Company,  Kentucky  Power  Company,  Kingsport  Power
Company,  Indiana Michigan Power Company,  Ohio Power Company and Wheeling Power
Company (sometimes collectively referred to herein as "Applicants") hereby amend
their Application or Declaration on Form U-1 in File No. 70-8779:
      By amending and restating the last two paragraphs of Item 1C as follows:
            "By orders dated  September 13, 1996 (HCAR No.  26572),  September
      27, 1996 (HCAR No. 26583), May 2, 1997 (HCAR No. 26713) (the 'May Order'),
      November  30,  1998 (HCAR No.  26947) and April 7, 1999 (HCAR No.  26998),
      American was authorized to form direct or indirect nonutility subsidiaries
      to broker  and  market  electric  power,  natural  and  manufactured  gas,
      emission allowances, coal, oil, refined petroleum products and natural gas
      liquids. In addition, American has authority to guarantee through December
      31,  2002 up to $200  million  of debt  and up to $200  million  of  other
      obligations of such subsidiaries (collectively, the 'Guarantee Authority')
      The Guarantee  Authority was expanded to permit  American to guarantee the
      debt and other obligations of any subsidiary acquired or established under
      Rule 58.

            American  now  requests  to  increase  such   authorization  to  (i)
      guarantee debt of such  subsidiaries  to third parties in an amount not to
      exceed  $600,000,000  through  June  30,  2004 and  (ii)  guarantee  other
      obligations  of such  subsidiaries  to third  parties  in an amount not to
      exceed $600,000,000 through June 30, 2004. Guaranties may take the form of
      an   agreement   by  American  to   guarantee,   undertake   reimbursement
      obligations,  assume  liabilities or other obligations with respect to, or
      act  as  surety  on,  bonds,   letters  of  credit,   equity  commitments,
      performance  and  other  obligations.   The  authority  sought  herein  is
      necessary  because  American is active in the development and expansion of
      its energy-related  non-utility businesses.  At the current time, American
      is  investigating  various  opportunities.  All other  terms  relating  to
      American's  authority  to  guarantee  such  subsidiaries'  debt and  other
      obligations, as set forth in the Orders, remain unchanged. As of September
      30,   1999,   American's   investment   limitation   under   Rule  58  was
      $1,964,098,000."


                                    SIGNATURE

      Pursuant to the  requirements of the Public Utility Holding Company Act of
1935, the undersigned  companies have duly caused this statement to be signed on
their behalf by the undersigned thereunto duly authorized.
                      AMERICAN ELECTRIC POWER COMPANY, INC.
                      AMERICAN ELECTRIC POWER SERVICE CORPORATION
                      APPALACHIAN POWER COMPANY
                      COLUMBUS SOUTHERN POWER COMPANY
                      INDIANA MICHIGAN POWER COMPANY
                      KENTUCKY POWER COMPANY
                      KINGSPORT POWER COMPANY
                      OHIO POWER COMPANY
                      WHEELING POWER COMPANY


                  By    /s/ A. A. Pena
                              Treasurer


Dated: February 1, 2000