UniSource Energy Corporation Computation of Ratio of Earnings to Fixed Charges

	6 Months Ended			12 Months Ended			12 Months Ended(2)
	Jun. 30,			Jun. 30,			Dec. 31,			Dec. 31,			Dec. 31,			Dec. 31,			Dec. 31,
	2006			2006			2005			2004			2003			2002			2001
	- Thousands of Dollars -						- Thousands of Dollars -
Fixed Charges:
Interest on Long-Term Debt	$	37,892		$	74,558		$	76,762		$	80,968		$	80,844		$	65,620		$	68,678
Other Interest (1)		2,573			4,222			3,153			1,947			3,709			2,123			1,287
Interest on Capital Lease Obligations		37,073			77,024			79,098			85,912			84,080			87,801			90,559
Total Fixed Charges		77,538			155,804			159,013			168,827			168,633			155,544			160,524

Net Income		26,820			67,279			46,144			45,919			113,941			34,928			63,839

Less:
Discontinued Operations - Net of Tax		(2,669	)		(5,135	)		(5,483	)		(5,063	)		(7,472	)		(12,919	)		(9,926	)
Accounting Change - Net of Tax		-			(626	)		(626	)		-			67,471			-			470
Net Income from Continuing Operations		29,489			73,040			52,253			50,982			53,942			47,847			73,295

Add (Deduct):
(Income) Losses from Equity Investees		24			(2,819	)		(2,113	)		(7,121	)		3,051			3,047			10,748
Income Taxes		20,917			50,913			37,623			37,186			16,531			26,432			55,616
Total Fixed Charges		77,538			155,804			159,013			168,827			168,633			155,544			160,524

Total Earnings before Taxes and Fixed Charges	$	127,968		$	276,938		$	246,776		$	249,874		$	242,157		$	232,870		$	300,183

Ratio of Earnings to Fixed Charges		1.650			1.777			1.552			1.480			1.436			1.497			1.870