Exhibit 12.3

Central Illinois Public Service Company Computation Of Ratio Of Earnings To Fixed Charges And Preferred Stock Dividend Requirements (Thousands of Dollars, Except Ratios)
	Year Ended December 31,
	2000		2001		2002		2003		2004
Net Income	$	79,362	$	45,309	$	26,355	$	28,474	$	32,463
Add- Extraordinary items net of tax		-		-		-		-		-
Net income from continuing operations		79,362		45,309		26,355		28,474		32,463
Taxes based on income		43,661		28,245		16,955		6,245		16,135
Net income before income taxes		123,023		73,554		43,310		34,719		48,598
Add- fixed charges:
Interest on long term debt		28,935		33,523		38,625		32,338		30,533
Other interest		8,497		4,750		978		780		839
Amortization of net debt premium, discount,
expenses and losses		2,880		993		1,076		935		903
Total fixed charges		40,312		39,266		40,679		34,053		32,275
Earnings available for fixed charges	$	163,335	$	112,820	$	83,989	$	68,772	$	80,873
Ratio of earnings to fixed charges		4.05		2.87		2.06		2.01		2.50
Earnings required for preferred dividends:
Preferred stock dividends		3,882		3,627		3,158		2,973		2,512
Adjustment to pre-tax basis		2,135		2,260		2,031		651		1,248
		6,017		5,887		5,189		3,624		3,760
Fixed charges plus preferred stock dividend
requirements	$	46,329	$	45,153	$	45,868	$	37,677	$	36,035
Ratio of earnings to fixed charges plus
preferred stock dividend requirements		3.52		2.49		1.83		1.82		2.24