Exhibit 12
WISCONSIN PUBLIC SERVICE CORPORATION
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND
RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDEND REQUIREMENTS
	2010
(Millions)	3 Months			2009			2008			2007			2006			2005
EARNINGS
Net Income from continuing operations	$	48.3		$	120.4		$	132.3		$	113.3		$	102.1		$	84.5
Provision for income taxes		30.6			68.0			73.1			66.8			58.3			44.1
Income from continuing operations before income taxes		78.9			188.4			205.4			180.1			160.4			128.6
Less: Undistributed earnings of less than 50% owned affiliates		(0.4	)		(1.8	)		(2.2	)		(2.5	)		(3.2	)		(2.0	)
Adjusted income from continuing operations before income taxes		78.5			186.6			203.2			177.6			157.2			126.6
Total fixed charges as defined		14.4			58.5			48.1			45.3			42.3			38.0
Total earnings as defined	$	92.9		$	245.1		$	251.3		$	222.9		$	199.5		$	164.6
FIXED CHARGES
Interest expense	$	13.7		$	54.0		$	44.0		$	43.5		$	40.4		$	35.9
Allowance for funds used during construction		0.1			2.0			1.8			0.3			0.2			0.4
Interest factor applicable to rentals		0.6			2.5			2.3			1.5			1.7			1.7
Total fixed charges as defined	$	14.4		$	58.5		$	48.1		$	45.3		$	42.3		$	38.0
Preferred stock dividend requirements *		1.3			4.9			4.8			4.9			4.9			4.7
Total fixed charges and preferred stock dividend requirements	$	15.7		$	63.4		$	52.9		$	50.2		$	47.2		$	42.7
RATIO OF EARNINGS TO FIXED CHARGES		6.5			4.2			5.2			4.9			4.7			4.3
RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDEND REQUIREMENTS		5.9			3.9			4.7			4.4			4.2			3.9
* Represents preferred stock dividend requirements of Wisconsin Public Service computed by dividing the preferred stock dividend requirements by 100% minus the income tax rate.