Exhibit 12.3

Central Illinois Public Service Company Computation of Ratios of Earnings to Fixed Charges and Combined Fixed Charges and Preferred Stock Dividend Requirements (Thousands of Dollars, Except Ratios)
	6 Months Ended			Year Ended
	June 30,			December 31,
	2008			2007
Net income from continuing operations	$	690		$	16,535
Add- Taxes based on income		156			9,322
Net income before income taxes		846			25,857
Add- fixed charges:
Interest on long term debt (1)		14,402			36,670
Estimated interest cost within rental expense		302			899
Amortization of net debt premium, discount,      and expenses		513			1,105
Total fixed charges		15,217			38,674
Earnings available for fixed charges		16,063			64,531
Ratio of earnings to fixed charges		1.05			1.66
Earnings required for combined fixed charges and preferred stock dividends:
Preferred stock dividends		1,256			2,512
Adjustment to pre-tax basis		284			1,416
		1,540			3,928
Combined fixed charges and preferred stock dividend requirements	$	16,757		$	42,602
Ratio of earnings to combined fixed charges and preferred stock dividend requirements		-	(2)		1.51
(1)  Includes FIN 48 interest expense
(2) Earnings were inadequate to cover fixed charges by $694 thousand for the six months ended June 30, 2008.