| THE      BANK OF TOKYO-MITSUBISHI UFJ, LTD. | BARCLAYS      BANK PLC      | BNP      PARIBAS            |
|---------------------------------------------|-----------------------------|-----------------------------|
| Co-Documentation      Agent                 | Co-Documentation      Agent | Co-Documentation      Agent |

----

| ARTICLE      I DEFINITIONS AND ACCOUNTING TERMS                                                          | 1      |
|----------------------------------------------------------------------------------------------------------|--------|
|                                                                                                     |   |
| SECTION      1.01. Certain Defined Terms.                                                                | 1      |
| SECTION      1.02. Computation of Time Periods.                                                          | 16     |
| SECTION      1.03. Accounting Terms.                                                                     | 16     |
| SECTION      1.04. Other Interpretive Provisions.                                                        | 16     |
|                                                                                                     |   |
| ARTICLE      II AMOUNTS AND TERMS OF THE EXTENSIONS OF CREDIT                                            | 16     |
|                                                                                                     |   |
| SECTION      2.01. The Commitments.                                                                      | 16     |
| SECTION      2.02. Making the Ratable Advances.                                                          | 17     |
| SECTION      2.03. Swingline Advances.                                                                   | 18     |
| SECTION      2.04. Letters of Credit.                                                                    | 19     |
| SECTION      2.05. Fees.                                                                                 | 23     |
| SECTION      2.06. Termination or Reduction of the Commitments.                                          | 24     |
| SECTION      2.07. Repayment of Advances.                                                                | 24     |
| SECTION      2.08. Evidence of Indebtedness.                                                             | 24     |
| SECTION      2.09. Interest on Advances.                                                                 | 25     |
| SECTION      2.10. Interest Rate Determination.                                                          | 26     |
| SECTION      2.11. Optional Conversion of Advances.                                                      | 26     |
| SECTION      2.12. Optional Prepayments of Advances.                                                     | 27     |
| SECTION      2.13. Increased Costs.                                                                      | 27     |
| SECTION      2.14. Illegality.                                                                           | 28     |
| SECTION      2.15. Payments and Computations.                                                            | 29     |
| SECTION      2.16. Taxes.                                                                                | 30     |
| SECTION      2.17. Sharing of Payments, Etc.                                                             | 31     |
|                                                                                                     |   |
| ARTICLE      III CONDITIONS PRECEDENT                                                                    | 32     |
|                                                                                                     |   |
| SECTION      3.01. Conditions Precedent to Initial Extensions ofCredit.                                  | 32     |
| SECTION      3.02. Conditions Precedent to each Extension of Credit.                                     | 33     |
| SECTION      3.03. Additional Conditions Precedent to Initial Extensions of Credit to      CSPC and OPC. | 34     |
|                                                                                                     |   |
| ARTICLE      IV REPRESENTATIONS AND WARRANTIES                                                           | 34     |
|                                                                                                     |   |
| SECTION      4.01. Representations and Warranties of the Borrowers.                                      | 34     |
|                                                                                                     |   |
| ARTICLE      V COVENANTS OF THE BORROWERS                                                                | 36     |
|                                                                                                     |   |
| SECTION      5.01. Affirmative Covenants.                                                                | 36     |
| SECTION      5.02. Negative Covenants.                                                                   | 39     |
| SECTION      5.03. Financial Covenant.                                                                   | 41     |
|                                                                                                     |   |
| ARTICLE      VI EVENTS OF DEFAULT                                                                        | 42     |
|                                                                                                     |   |
| SECTION      6.01. Events of Default.                                                                    | 42     |
| SECTION      6.02. Actions in Respect of the Letters of Credit upon      Default.                        | 44     |
|                                                                                                     |   |
| ARTICLE      VII THE ADMINISTRATIVE AGENT                                                                | 44     |
|                                                                                                     |   |
| SECTION      7.01. Authorization and Action.                                                             | 44     |
| SECTION      7.02. Agent's Reliance, Etc.                                                                | 45     |
| SECTION      7.03. JPMCB and its Affiliates.                                                             | 45     |
| SECTION      7.04. Lender Credit Decision.                                                               | 46     |
| SECTION      7.05. Indemnification.                                                                      | 46     |
| SECTION      7.06. Successor Agent.                                                                      | 46     |
|                                                                                                     |   |
| ARTICLE      VIII MISCELLANEOUS                                                                          | 47     |
|                                                                                                     |   |
| SECTION      8.01. Amendments, Etc.                                                                      | 47     |
| SECTION      8.02. Notices, Etc.                                                                         | 48     |
| SECTION      8.03. No Waiver; Remedies.                                                                  | 49     |
| SECTION      8.04. Costs and Expenses.                                                                   | 49     |
| SECTION      8.05. Right of Set-off.                                                                     | 51     |
| SECTION      8.06. Binding Effect.                                                                       | 52     |
| SECTION      8.07. Assignments and Participations.                                                       | 52     |
| SECTION      8.08. Confidentiality.                                                                      | 56     |
| SECTION      8.09. Governing Law.                                                                        | 56     |
| SECTION      8.10. Severability.                                                                         | 56     |
| SECTION      8.11. Execution in Counterparts.                                                            | 56     |
| SECTION      8.12. Jurisdiction, Etc.                                                                    | 56     |
| SECTION      8.13. Waiver of Jury Trial.                                                                 | 57     |
| SECTION      8.14. USA Patriot Act.                                                                      | 57     |
| SECTION      8.15. No Fiduciary Duty.                                                                    | 57     |

----

| ApplicableRating      Level |          Applicable Marginfor      Eurodollar Rate                                  Advances | Applicable      Margin            for Base Rate Advances                                                                                                                |
|-----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1                           | 0.350%                                                                                                                                                                                                                                                  |  0.000%                                                                                                                                                                                     |
| 2                           | 0.400%                                                                                                                                                                                                                                                  |                                     0.000% |
| 3                           | 0.500%                                                                                                                                                                                                                                                  |                                     0.000% |
| 4                           | 0.600%                                                                                                                                                                                                                                                  |                                     0.000% |
| 5                           | 0.700%                                                                                                                                                                                                                                                  |                                     0.000% |
| 6                           | 1.000%                                                                                                                                                                                                                                                  |                                     0.000% |

| S&P      Rating/Moody’s Rating                                                                                 |                    Applicable Rating Level |
|--------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------|
| S&P      Rating A or higher or Moody’s Rating A2 or higher                                                     | 1                                                                                                           |
| S&P      Rating A- or higher or Moody’s Rating A3 or higher                                                    | 2                                                                                                           |
| S&P      Rating BBB+ or Moody’s Rating Baa1                                                                    | 3                                                                                                           |
| S&P      Rating BBB or Moody’s Rating Baa2                                                                     | 4                                                                                                           |
| S&P      Rating BBB- or Moody’s Rating Baa3                                                                    | 5                                                                                                           |
| S&P      Rating BB+ or below or Moody’s Rating Ba1 or below, or no S&P Rating      or Moody’s Rating | 6                                                                                                           |

| (i)   | the      rate of interest announced publicly by JPMCB, from time to time, as      JPMCB’s prime rate; and |
|-----------------|-----------------------------------------------------------------------------------------------------------------|

| (ii)   | 1/2      of 1% per annum above the Federal FundsRate. |
|------------------|-------------------------------------------------------|

| Borrower | Sublimit     |
|----------|--------------|
| AEP      | $650,000,000 |
| OPC      | $400,000,000 |
| APC      | $300,000,000 |
| CSPC     | $230,000,000 |
| IMPC     | $230,000,000 |
| SEPC     | $230,000,000 |
| ATCC     | $130,000,000 |
| ATNC     | $65,000,000  |
| KPC      | $65,000,000  |
| PSCO     | $65,000,000  |

| ApplicableRating      Level |         Commitment        Fee Rate |
|-----------------------------|--------------------------------------------------------|
| 1                           | 0.050%                                                 |
| 2                           | 0.060%                                                 |
| 3                           | 0.070%                                                 |
| 4                           | 0.090%                                                 |
| 5                           | 0.125%                                                 |
| 6                           | 0.150%                                                 |

|   | (i) | no      Borrower may select any Interest Period that ends after the Termination      Date; |
|--------|-----|--------------------------------------------------------------------------------------------|

|   | (ii) | Interest      Periods commencing on the same date for Eurodollar Rate Advances      comprising part of the same Borrowing shall be of the same      duration; |
|--------|------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (iii) | whenever      the last day of any Interest Period would otherwise occur on a day other      than a Business Day, the last day of such Interest Period shall be      extended to occur on the next succeeding Business Day, provided, however,      that, if such extension would cause the last day of such Interest Period      to occur in the next following calendar month, the last day of such      Interest Period shall occur on the next preceding Business Day;      and |
|--------|-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (iv) | whenever      the first day of any Interest Period occurs on a day of an initial      calendar month for which there is no numerically corresponding day in the      calendar month that succeeds such initial calendar month by the number of      months equal to the number of months in such Interest Period, such      Interest Period shall end on the last Business Day of such succeeding      calendar month. |
|--------|------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| AEP      TEXAS CENTRAL COMPANYAEP      TEXAS NORTH COMPANYAMERICAN      ELECTRIC POWER COMPANY, INC.APPALACHIAN      POWER COMPANYCOLUMBUS      SOUTHERN POWER COMPANYINDIANA      MICHIGAN POWER COMPANYKENTUCKY      POWER COMPANYOHIO      POWER COMPANYPUBLIC      SERVICE COMPANY OF OKLAHOMASOUTHWESTERN      ELECTRIC POWER       COMPANY By  /s/  Julia A.      Sloat___________________       Name:      Julia A. Sloat       Title:      Treasurer |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| JPMORGAN      CHASE BANK, N.A.as      Administrative Agent, Swingline Bank, LC Issuing Bank and as      LenderBy/s/  Michael J.      DeForge_____________Name:      Michael J. DeForgeTitle:      Executive Director |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| THE      ROYAL BANK OF SCOTLAND PLC, as LC Issuing Bank and Lender  By/s/ Emily      Freedman______________Name:      Emily FreedmanTtle:      Vice President |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| THE      BANK OF TOKYO-MITSUBISHI UFJ, LTD., NEW YORK BRANCH, as Documentation      Agent and Lender  By/s/  Chi-Cheng      Chen______________Name:      Chi-Cheng ChenTitle:      Authorized Signatory |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| BNP      PARIB   AS, as Documentation Agent and Lender  By      /s/  Francis  J.      Delaney____________                               Name:  Francis      J. Delaney                            Title:  Managing      Director By/s/  Ravina      Advana_______________Name:  Ravina      AdvanaTitle:  Vice      President  |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| BARCLAYS      BANK PLC, Documentation Agent and Lender  By      /s/  Gary B.      Wenslow_____________Name:  Gary      B. WenslowTitle:  Associate      Director  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| CITIBANK,      N.A.  By/s/  Nietzche      Rodricks____________Name:  Nietzche      RodricksTitle:  Vice      President  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| THE      BANK OF NEW YORK  By/s/  John-Paul      Marotta____________Name:  John-Paul      MarottaTitle:  Managing      Director  |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| CALYON,      NEW YORK BRANCH  By/s/ Darrell      Stanley_______________Name:  Darrell      StanleyTitle:  Managing      Director  By/s/ Sharada      Manne_______________Name:  Sharada      ManneTitle:  Director  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| CREDIT      SUISSE, CAYMAN ISLANDS BRANCH  By/s/ Brian      Caldwell_______________Name:  Brian      CaldwellTitle:  Director  By/s/  Nupur      Kumar________________Name:  Nupur      KumarTitle:  Associate  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| KEYBANK      NATIONAL ASSOCIATION  By/s/  Sherrie I.      Manson_____________Name:  Sherrie      I. MansonTitle:  Senior      Vice President  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| UBS      LOAN FINANCE LLC  By/s/  Mary E.      Evans_______________Name:  Mary      E. EvansTitle:  Associate      Director  By/s/  David B.      Julie________________Name:  David      B. JulieTitle:  Associate      Director  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| MERRILL      LYNCH BANK USA  By/s/  Louis      Alder_________________Name:  Louis      AlderTitle:  First      Vice President  |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| MORGAN      STANLEY BANK  By/s/  Daniel      Twenge_______________Name:  Daniel      TwengeTitle:  Authorized      Signatory  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| SUNTRUST      BANK  By/s/  Lindsay      Minneman____________Name:  Lindsay      MinnemanTitle:  Vice      President  |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| WACHOVIA      BANK, NATIONAL ASSOCIATION  By/s/  Henry R.      Biedrzycki___________Name:  Henry      R. BiedrzyckiTitle:  Director  |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| WILLIAM      STREET COMMITMENT CORPORATION  By/s/  Mark      Walton________________Name:  Mark      WaltonTitle:  Authorized      Signatory  |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| LEHMAN      BROTHERS BANK, FSB  By/s/  Janine      Shugan________________Name:  Janine      ShuganTitle:  Authorized      Signatory  |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| BANCO      BILBAO VIZCAYA ARGENTARIA S.A.  By/s/  Peter      Tommaney_____________Name:  Peter      TommaneyTitle:  Senior      vice President  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| THE      NORTHERN TRUST COMPANY  By/s/  Jeffrey P.      Sullivan____________Name:  Jeffrey      P. SullivanTitle:  Vice      President  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| U.S.      BANK, NATIONAL ASSOCIATION  By/s/  Christine L.      Wagner___________Name:  Christine      L. WagnerTitle:  Vice      President  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| WESTLB      AG, NEW YORK BRANCH  By/s/  Martin C.      Livingstone__________Name:  Martin      C. LivingstoneTitle:  Executive      Director  By/s/  Christopher      Nunn_____________Name:  Christopher      NunnTitle:  Executive      Director  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

----

1

| (vii)   | any      other additional conditions are as follows:      ___________________. |
|-------------------|--------------------------------------------------------------------------------|

| By       ____________________________________ |   |
|----------------------------------------------------|--------|

----

  

  
| 2 | Necessary      only for modification oramendment |
|---|--------------------------------------------------|

----

3

  

| 3 | Omit      for assignments pursuant to Section8.07(h). |
|---|-------------------------------------------------------|

----

| (i)Assignor’s      Commitments prior to Assignment and Acceptance:             | $__________                              |
|--------------------------------------------------------------------------------------|------------------------------------------|
| (ii)Amount      of Commitment assigned by Assignor:                                  | $__________                              |
| (iii)[Assignor’s      remaining Commitment:                                    | $__________]                             |
| (iv)Percentage      interest assigned by Assignor:                                   | _________%                               |
| (v)Assignee’s      Commitment:                                                 | $__________      (assigned hereunder)    |
|                                                                                 | [$__________      (original Commitment)] |
|                                                                                 | $__________      (assigned hereunder)    |
| (vi)Aggregate      outstanding principal amount of Advances assigned by    Assignor: | $__________                              |
| (vii)Effective      Date:                                                            | _____________,      20__                 |

----

----

| (1)   | The      Credit Agreement. |
|-----------------|----------------------------|

| (2)   | The      documents furnished by the Borrowers pursuant to Article III of the Credit      Agreement. |
|-----------------|-----------------------------------------------------------------------------------------------------|

| (3)   | The      certificates of incorporation of the Borrowers and all amendments      thereto. |
|-----------------|------------------------------------------------------------------------------------------|

| (4)   | The      by-laws of the Borrowers and all amendments  thereto. |
|-----------------|----------------------------------------------------------------|

| (5)   | Certificates      of the Secretary of State or equivalent officer of each state in which a      Borrower is incorporated or otherwise formed, dated as of a recent date,      attesting to the continued existence and good standing of the Borrowers      incorporated or otherwise formed in thatState. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 1.   | Each      Borrower (a) is a corporation duly organized, validly existing and in good      standing under the laws of the state of its incorporation or formation;      (b) has the corporate power and authority, and the legal right, to own and      operate its property, to lease the property which it operates as lessee      and to conduct the business in which it is currently engaged and in which      it proposes to be engaged after the date hereof; (c) is duly qualified as      a foreign corporation and is in good standing under the laws of each      jurisdiction where its ownership, lease or operation of property or the      conduct of its business requires such qualification, except any such      jurisdiction where the failure to so qualify could not, in the aggregate,      reasonably be expected to result in a Material Adverse Change; (d) owns or      possesses all material licenses and permits necessary for the operation by      it of its business as currently conducted; and (e) is in compliance with      all Requirements of Law, except as disclosed in the Disclosure Documents      referenced in Section 4.01(e) of the Credit Agreement or to the extent      that the failure to comply therewith could not, in the aggregate,      reasonably be expected to have a Material Adverse Effect.  The      term “Requirements of Law” means the laws of the State of Ohio and the      laws, rules and regulations of the United States of America (including,      without limitation, ERISA and Environmental Laws) and orders of any      governmental authority applicable to the  Borrowers. |
|----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 2.   | Each      Borrower has the corporate power and authority, and the legal right, to      execute and deliver the Credit Agreement and to perform under, and to      borrow under, the Credit Agreement.  Each Borrower has taken all      necessary corporate action to authorize the execution, delivery and      performance of the Credit Agreement and the incurrence of Advances on the      terms and conditions of the Credit Agreement, and the Credit Agreement has      been duly executed and delivered by each of the  Borrowers. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 3.   | The      execution, delivery and performance of the Credit Agreement and the      Advances made thereunder will not violate any Requirements of Law, any      Borrower's certificate of incorporation or by-laws, or any material      contractual restriction binding on or affecting such Borrower or any of      its properties. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4.   | Except      as required with respect to CSPC and OPC pursuant to Section 3.03 of the      Credit Agreement, no approval or authorization or other action by, and      notice to or filing with, any governmental agency or regulatory body or      other third person is required in connection with the due execution and      delivery of the Credit Agreement and the performance, validity or      enforceability of the CreditAgreement. |
|----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 5.   | Except      as described in Section 4.01(e) of the Credit Agreement, no action, suit,      investigation, litigation, or proceeding, including, without limitation,      any Environmental Action, affecting the Borrowers or any of their      Significant Subsidiaries before any court, government agency or arbitrator      is pending or, to my knowledge, threatened, that is reasonably likely to      have a Material Adverse Effect. |
|----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 6.   | No      Borrower nor any of their respective Significant Subsidiaries is an      “investment company”, or an “affiliated person” of, or “promoter” or      “principal underwriter” for, an “investment company”, as such terms are      defined in the Investment Company Act of 1940, as      amended.  Neither the making of any Advances, the application of      the proceeds or repayment thereof by the Borrowers nor the consummation of      the other transactions contemplated by the Credit Agreement will violate      any provision of such Act or any rule, regulation or order of the      Securities and Exchange Commissionthereunder. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | 7.   | In      any action or proceeding arising out of or relating to the Credit      Agreement in any court of the State of Ohio or in any Federal court      sitting in the State of Ohio, such court would recognize and give effect      to the provisions of Section 8.09 of the Credit Agreement, wherein the      parties thereto agree that the Credit Agreement shall be governed by, and      construed in accordance with, the laws of the State of New      York.  However, if a court of the State of Ohio or a Federal      court sitting in the State of Ohio were to hold that the Credit Agreement      is governed by, and to be construed in accordance with, the laws of the      State of Ohio, the Credit Agreement would be, under the State of Ohio, the      legal, valid and binding obligation of the Borrowers enforceable against      the Borrowers in accordance with itsterms. |
|--------|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

----

----

----