BRUCE H. BECKETT
WILLIAM JAY POWELL
JOHN L. ROARK
COLLY J. DURLEY
JAMES B. LOWERY

Of Counsel
ROBERT C. SMITH
RAYMOND C. LEWIS, JR.

Smith Lewis, LLP
ATTORNEYS AT LAW
	    	P.O. BOX 918
COLUMBIA, MISSOURI 65205-0918
    • • •
CITY CENTRE
111 SOUTH NINTH STREET, SUITE 200
COLUMBIA, MISSOURI 65201-4891

(573) 443-3141 • Fax (573) 442-6686

MICHAEL R. TRIPP
PHEBE LA MAR
DAVID M. KURTZ
SARAH E. GIBONEY

Nurse Consultant
ANNETTE THORNHILL, RN, PhD

Paralegals
KELLY K. BRUCE, CLA
VICKI R. SCHUMACHER

June 12, 2003

The Honorable Lewis Mills
c/o Secretary/Chief Regulatory Law Judge
Public Service Commission
P.O. Box 360
Jefferson City, Missouri 65202

RE:	In re: Application of Union Electric Company 
	for Authority to Participate in the Midwest ISO through
	a contractual relationship with GridAmerica
	Case No. EO-2003-0271

Dear Judge Mills:

This letter is to correct a date mis-cited in AmerenUE’s Reply in Opposition to Public Counsel’s Second Motion to Compel filed earlier today.  I am told that the Midwest ISO began operations on February 1, 2002, and not February 1, 2003, as I had indicated in the Reply at page 4.  In substance, this mistake does not change the Company’s argument regarding OPC Drs 583 and 584, but upon being advised of the error, I felt it appropriate to correct it via this letter.  A copy of this letter has been served upon all parties of record.

							Respectfully submitted,

							/s/ James B. Lowery

							James B. Lowery
							Attorney for AmerenUE