BEFORE THE PUBLIC SERVICE COMMISSION

OF THE STATE OF MISSOURI

In The Matter of a Determination of Special )

Contemporary Resource Planning Issues to be )

Addressed by Ameren Missouri in its Next ) File No. EO-2013-0104

Triennial Compliance Filing or Next Annual )

Update Report )

NOTICE OPENING FILE

Issue Date: September 13, 2012

This notice serves to open a new file in the Missouri Public Service Commission’s Electronic Filing and Information System (EFIS).

BY THE COMMISSION

Steven C. Reed

Secretary

( S E A L )

Dated at Jefferson City, Missouri,

On this 13^th day of September, 2012.

Woodruff, Chief Regulatory Law Judge