Ameren Energy Marketing Co. and Central Illinois Public Service Company d/b/a AmerenCIPS; Notice of Filing

Take notice that on September 14, 2004, Ameren Energy Marketing Company and Central Illinois Public Service Company d/b/a AmerenCIPS (collectively, Ameren Companies) submitted for filing a response to provide additional information to the Commission regarding a proposed amendment to the existing electric power supply agreement between the Ameren Companies. Ameren Companies state that the filing is in response to the Commission's letter order issued September 1, 2004, requesting all data which would validate the use of the Market Value Index formula for the proposed two-year extension.

Any person desiring to intervene or to protest this filing must file in accordance with Rules 211 and 214 of the Commission's Rules of Practice and Procedure (18 CFR 385.211, 385.214). Protests will be considered by the Commission in determining the appropriate action to be taken, but will not serve to make protestants parties to the proceeding. Any person wishing to become a party must file a notice of intervention or motion to intervene, as appropriate. Such notices, motions, or protests must be filed on or before the comment date. Anyone filing a motion to intervene or protest must serve a copy of that document on the Applicant and all parties to this proceeding.

The Commission encourages electronic submission of protests and interventions in lieu of paper using the “eFiling” link at http://www.ferc.gov . Persons unable to file electronically should submit an original and 14 copies of the protest or intervention to the Federal Energy Regulatory Commission, 888 First Street, NE., Washington, DC 20426.

This filing is accessible on-line at http://www.ferc.gov , using the “eLibrary” link and is available for review in the Commission's Public Reference Room in Washington, DC. There is an “eSubscription” link on the Web site that enables subscribers to receive e-mail notification when a document is added to a subscribed docket(s). For assistance with any FERC Online service, please e-mail FERCOnlineSupport@ferc.gov, or call (866) 208-3676 (toll free). For TTY, call (202) 502-8659.

Comment Date: 5 p.m. eastern time on October 5, 2004.