PEORIA, Ill., Sept. 3 /PRNewswire-FirstCall/ -- CILCORP Inc., a wholly owned subsidiary of Ameren Corporation (NYSE: AEE), announced today that it has commenced a cash tender offer (the 'tender offer') for any and all of its outstanding 8.700% senior notes due 2009 (CUSIP No. 171794 AE0) (the '2009 notes') and 9.375% senior bonds due 2029 (CUSIP No. 171794 AF7) (the '2029 notes' and, together with the 2009 notes, the 'notes'). Currently $123,755,000 aggregate principal amount of the 2009 notes and $210,565,000 aggregate principal amount of the 2029 notes are outstanding.

Concurrently with the tender offer, CILCORP is soliciting consents (the 'consent solicitation') from the holders of the notes to certain proposed amendments (the 'proposed amendments') to the indenture governing the notes (the 'indenture'). The proposed amendments would eliminate certain restrictive covenants in the indenture and the notes.

The complete terms and conditions of the tender offer and the consent solicitation are set forth in an offer to purchase and consent solicitation statement dated September 3, 2008 ('offer to purchase') and the related letter of transmittal and consent.