Exhibit 12.01

SOUTHWEST GAS CORPORATION

COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES

(Thousands of dollars)

	December 31,
	2012		2011		2010		2009		2008
1. Fixed charges:
A) Interest expense	$	67,148	$	68,183	$	75,481	$	81,861	$	90,403
B) Amortization		2,001		2,137		2,620		2,097		2,880
C) Interest portion of rentals		10,605		8,943		6,455		6,644		7,802
Total fixed charges	$	79,754	$	79,263	$	84,556	$	90,602	$	101,085
2. Earnings (as defined):
D) Pretax income from continuing operations	$	207,915	$	175,066	$	158,378	$	132,035	$	101,808
Fixed Charges (1. above)		79,754		79,263		84,556		90,602		101,085
Total earnings as defined	$	287,669	$	254,329	$	242,934	$	222,637	$	202,893
		3.61		3.21		2.87		2.46		2.01