Exhibit 12b

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

	6 Months Ended			12 Months Ended			12 Months Ended
	June 30,			June 30,			Dec. 31,			Dec. 31,		Dec. 31,			Dec. 31,			Dec. 31,
	2009			2009			2008			2007		2006			2005			2004
							- Thousands of Dollars -
Fixed Charges:
Interest on Long-Term Debt	$	18,404		$	41,523		$	47,456		$	50,230	$	51,422		$	56,243		$	69,904
Other Interest (1)		683			581			1,367			4,538		6,436			2,597			1,263
Interest on Capital Lease Obligations		26,564			55,161			57,252			64,477		72,556			79,064			85,869
Estimated Interest Portion of Rental Expense		50			115			130			160		188			216			243
Total Fixed Charges		45,701			97,380			106,205			119,405		130,602			138,120			157,279
Net Income		25,953			33,412			4,363			53,456		66,745			48,267			46,127
Less:
Cumulative Effect of Accounting Change — Net of Tax		—			—			—			—		—			(626	)		—
Net Income from Continuing Operations		25,953			33,412			4,363			53,456		66,745			48,893			46,127
Add (Deduct):
Income from Equity Investees (2)		(3,144	)		(3,144	)		(1,381	)		0		(320	)		(314	)		(131	)
Income Taxes		15,887			27,285			10,867			35,542		42,478			33,907			34,815
Total Fixed Charges		45,701			97,380			106,205			119,405		130,602			138,120			157,279
Total Earnings before Taxes and Fixed Charges		84,397			154,933		$	120,054		$	208,403	$	239,505		$	220,606		$	238,090
Ratio of Earnings to Fixed Charges		1.847			1.591			1.130			1.745 1		.834 1			.597 1.			514

(1)	Excludes recognition of Allowance for Borrowed Funds Used During Construction.
(2)	Includes Equity in Investment in Lease Equity and Inncom International, Inc. Income.