Consent of independent registered public accounting firm

EX-23.1 11 dex231.htm CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Consent of independent registered public accounting firm

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 (No. 333-155416-03) of Central Illinois Public Service Company of our report dated February 26, 2010 relating to the financial statements of Illinois Power Company, which is incorporated by reference in this Current Report on Form 8-K of Ameren Illinois Company dated October 7, 2010.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

St. Louis, Missouri

October 7, 2010