Tucson Electric Power 10-Q 2010 Q3 Quarterly report

Exhibit 12b

Tucson Electric Power Company
Computation of Ratio of Earnings to Fixed Charges

	9 Months Ended			12 Months Ended		12 Months Ended
	September 30,			September 30,		Dec. 31,		Dec. 31,			Dec. 31,		Dec. 31,			Dec. 31,
	2010			2010		2009		2008			2007		2006			2005
	- Thousands of Dollars -
Fixed Charges:
Interest on Long-Term Debt	$	30,255		$	39,248	$	36,226	$	47,456		$	50,230	$	51,422		$	56,243
Other Interest (1)		(434	)		34		1,571		1,367			4,538		6,436			2,597
Interest on Capital Lease Obligations		39,537			53,378		53,670		57,252			64,477		72,556			79,064
Estimated Interest Portion of Rental Expense		41			67		106		130			160		188			216
Total Fixed Charges	$	69,399		$	92,727	$	91,573	$	106,205		$	119,405	$	130,602		$	138,120
Net Income	$	96,979		$	104,998	$	89,248	$	4,363		$	53,456	$	66,745		$	48,267
Add:
Cumulative Effect of Accounting Change Loss — Net of Tax		—			—		—		—			—		—			626
Net Income from Continuing Operations		96,979			104,998		89,248		4,363			53,456		66,745			48,893
Add (Deduct):
(Income) Losses from Equity Investees (2)		—			—		—		(1,381	)		—		(320	)		(314	)
Income Taxes		59,514			64,118		55,130		10,867			35,542		42,478			33,907
Total Fixed Charges		69,399			92,727		91,573		106,205			119,405		130,602			138,120
Total Earnings before Taxes and Fixed Charges	$	225,892		$	261,843	$	235,951	$	120,054		$	208,403	$	239,505		$	220,606
Ratio of Earnings to Fixed Charges		3.255			2.824		2.577		1.130			1.745		1.834			1.597

(1)	Excludes recognition of Allowance for Borrowed Funds Used During Construction.
(2)	Inncom International, Inc.(Income) Losses.