LETTER 1 filename1.txt Mail Stop 3561 September 16, 2005 Mr. Barry J. Sharp Executive Vice President and Chief Financial Officer The AES Corporation 4300 Wilson Boulevard Arlington, VA 22203 Re: AES Ironwood, LLC File No. 333-91391 AES Red Oak, LLC File No. 333-40478 Form 10-K for Fiscal Year Ended December 31, 2004 Filed March 30, 2005 Forms 10-Q for Fiscal Quarters Ended March 31, 2005 and June 30, 2005 IPALCO Enterprises, Inc. File No. 1-8644 Form 10-K for Fiscal Year Ended December 31, 2004 Filed March 24, 2005 Forms 10-Q for Fiscal Quarters Ended March 31, 2005 and June 30, 2005 AES Eastern Energy, LP File No. 333-89725 Form 10-K for Fiscal Year Ended December 31, 2004 Filed March 31, 2005 Forms 10-Q for Fiscal Quarters Ended March 31, 2005 and June 30, 2005 Dear Mr. Sharp: We have completed our review of your Form 10-Ks and related filings and have no further comments at this time. Sincerely, George F. Ohsiek, Jr. Branch Chief