Lilyanna L. Peyser

Attorney Advisor

Securities and Exchange Commission

Division of Corporate Finance

100 F. Street NE

Washington, D. C.  20549

July 8, 2010

RE:     American Electric Power Company, Inc.

Form 10-K for the Fiscal Year Ended December 31, 2009

Filed February 26, 2010

Definitive Proxy Statement on Schedule 14A

Filed March 15, 2010

File No.  001-03525

Appalachian Power Company

Form 10-K for the Fiscal Year Ended December 31, 2009

Filed February 26, 2010

Definitive Information Statement on Schedule 14A

Filed March 19, 2010

File No. 001-03457

Ohio Power Company

Form 10-K for the Fiscal year Ended December 31, 2009

Filed February 26, 2010

Definitive Information Statement on Schedule 14A

Filed March 19, 2010

File No.  001-06543

Columbus Southern Power Company

Form 10-K for the Fiscal Year Ended December 31, 2009

Filed February 26, 2010

File No.  001-06543

Indiana Michigan Power Company

Form 10-K for the Fiscal Year Ended December 31, 2009

Filed February 26, 2010

File No. 001-06543

Public Service Company of Oklahoma

Form 10-K for the Fiscal Year Ended December 31, 2009

Filed February 26, 2010

File No.  001-06543

Southwestern Electric Power Company

Form 10-K for the Fiscal Year Ended December 31, 2009

Filed February 26, 2010

File No.  001-06543

This letter confirms our conversation today and grants the companies an extension through July 16, 2010 to respond to the SEC comments. Please do not hesitate to call me (614-716-1648) with any questions you may have regarding this.

Very truly yours,

/s/ Thomas G. Berkemeyer