Exhibit 12.7

Illinois Power Company

Computation of Ratios of Earnings to Fixed Charges and Combined

Fixed Charges and Preferred Stock Dividend Requirements

(Thousands of Dollars, Except Ratios)

	Year Ended December 31,
	2004 (1)		2005		2006		2007			2008
Net income from continuing operations	$	137,538	$	97,039	$	56,659	$	25,780		$	4,970
Add- Taxes based on income		87,591		65,171		37,246		15,341			4,746
Net income before income taxes		225,129		162,210		93,905		41,121			9,716
Add- fixed charges:
Interest on long term debt		112,616		41,028		46,167		69,085	(2)		91,143	(2)
Estimated interest cost within rental expense		1,696		1,290		205		234			701
Amortization of net debt premium, discount, expenses and losses		18,772		2,315		3,537		8,454			8,922
Total fixed charges		133,084		44,633		49,909		77,773			100,766
Earnings available for fixed charges		358,213		206,843		143,814		118,894			110,482
Ratio of earnings to fixed charges		2.69		4.63		2.88		1.52			1.09
Earnings required for combined fixed charges and preferred stock dividends:
Preferred stock dividends		2,294		2,294		2,294		2,294			2,294
Adjustment to pre-tax basis		1,461		1,542		1,508		1,365			2,191
		3,755		3,836		3,802		3,659			4,485
Combined fixed charges and preferred stock dividend requirements	$	136,839	$	48,469	$	53,711	$	81,432		$	105,251
Ratio of earnings to combined fixed charges and preferred stock dividend requirements		2.61		4.26		2.67		1.46			1.04

⁽¹⁾ Ameren Corporation purchased Illinois Power Company on September 30, 2004, amounts include combined predecessor and successor financial information.

⁽²⁾ Includes FIN 48 interest expense