Exhibit 12

SOUTHWEST GAS CORPORATION
COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES
(Thousands of dollars)

	For the Twelve Months Ended
	Sep 30,		December 31,
	2004		2003		2002		2001		2000		1999
1. Fixed charges:
A) Interest expense	$	82,055	$	78,724	$	79,586	$	80,139	$	70,659	$	63,110
B) Amortization		2,867		2,752		2,278		1,886		1,564		1,366
C) Interest portion of rentals		6,368		6,665		8,846		9,346		8,572		8,217
D) Preferred securities distributions		--		4,015		5,475		5,475		5,475		5,475
Total fixed charges	$	91,290	$	92,156	$	96,185	$	96,846	$	86,270	$	78,168
2. Earnings (as defined):
E) Pretax income from
continuing operations	$	73,208	$	55,384	$	65,382	$	56,741	$	51,939	$	60,955
Fixed Charges (1. above)		91,290		92,156		96,185		96,846		86,270		78,168
Total earnings as defined	$	164,498	$	147,540	$	161,567	$	153,587	$	138,209	$	139,123
		1.80		1.60		1.68		1.59		1.60		1.78