Southwest Gas 10-Q 2010 Q3 Quarterly report

Exhibit 12.01

SOUTHWEST GAS CORPORATION

COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES

(Thousands of dollars)

	For the Twelve Months Ended
	Sep 30, 2010		December 31,
			2009		2008		2007		2006		2005
1. Fixed charges:
A) Interest expense	$	76,809	$	81,861	$	90,403	$	94,035	$	92,878	$	87,687
B) Amortization		2,607		2,097		2,880		2,783		3,467		3,700
C) Interest portion of rentals		6,247		6,644		7,802		7,952		6,412		6,333
Total fixed charges	$	85,663	$	90,602	$	101,085	$	104,770	$	102,757	$	97,720
2. Earnings (as defined):
D) Pretax income from continuing operations	$	160,477	$	132,035	$	101,808	$	131,024	$	128,357	$	68,435
Fixed Charges (1. above)		85,663		90,602		101,085		104,770		102,757		97,720
Total earnings as defined	$	246,140	$	222,637	$	202,893	$	235,794	$	231,114	$	166,155
		2.87		2.46		2.01		2.25		2.25		1.70