Exhibit 12.1

Ameren Corporation Computation Of Earnings To Fixed Charges (Thousands of Dollars)
	Year Ended December 31,
	2000			2001			2002			2003			2004
Net income from continuing operations	$	457,094		$	475,386		$	382,065		$	505,729		$	529,884
Income taxes		298,623			305,667			236,320			301,209			282,558
Fixed charges		204,631			222,671			239,140			303,234			303,038
Less:
Preference security dividend requirements of consolidated subsidiaries		(20,997	)		(20,447	)		(17,547	)		(17,330	)		(17,002	)
Total earnings	$	939,351		$	983,277		$	839,978		$	1,092,842		$	1,098,478
Fixed Charges:
Interest expense		179,706			198,648			218,741			281,735			282,851
Estimated interest cost within rental expense		3,928			3,576			2,852			4,169			3,185
Earnings required for preferred dividends:
Preference dividends of consolidated subsidiaries		12,700			12,445			10,841			10,861			11,089
Adjustment to pre-tax basis		8,297			8,002			6,706			6,469			5,913
		20,997			20,447			17,547			17,330			17,002
Total fixed charges	$	204,631		$	222,671		$	239,140		$	303,234		$	303,038
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Ratio of Earnings to Fixed Charges		4.59			4.42			3.51			3.60			3.62