BEFORE THE PUBLIC SERVICE COMMISSION

OF THE STATE OF MISSOURI

In the Matter of Union Electric Company, ) File No. ER-2014-0258

d/b/a Ameren Missouri’s Tariff to Increase ) Tariff No. YE-2015-0003

Its Revenues for Electric Service )

NOTICE REGARDING PREHEARING CONFERENCE

Issue Date: July 31, 2014

Anyone who wishes to participate in the August 5, 2014 prehearing conference by telephone may do so by calling 877-820-7831, and using the PIN 35666479#. CenturyLink may charge each phone participant nine cents per minute for using this service.

BY THE COMMISSION

Morris L. Woodruff

Secretary

Ronald D. Pridgin, Deputy Chief Regulatory

Law Judge, by delegation of authority

pursuant to Section 386.240, RSMo 2000.

Dated at Jefferson City, Missouri,

on this 31^st day of July, 2014.