August 8, 2016

Media Contact:  Sonya Headen, Las Vegas, NV (702) 364-3411

Shareholder Contact:  Ken Kenny, Las Vegas, NV (702) 876-7237

For Immediate Release

SOUTHWEST GAS CORPORATION

ANNOUNCES SECOND QUARTER 2016 EARNINGS

Las Vegas, Nev. – Southwest Gas Corporation (NYSE: SWX) reported consolidated earnings of $0.19 per basic share for the second quarter of 2016, an $0.08 increase from consolidated earnings of $0.11 per basic share for the second quarter of 2015.  Consolidated net income was $8.9 million for the second quarter of 2016, compared to consolidated net income of $4.9 million for the second quarter of 2015.  The natural gas segment had net income of $2.4 million in the second quarter of 2016 compared to a net loss of $657,000 in the second quarter of 2015, while the construction services segment had net income of $6.6 million in the current quarter compared to net income of $5.6 million in the second quarter of 2015.  Due to the seasonal nature of the Company's businesses, results for quarterly periods are not generally indicative of earnings for a complete twelve-month period.

According to John P. Hester, President and Chief Executive Officer, "We are pleased to report earnings per share of $0.19 for the second quarter of 2016, an $0.08 improvement over the prior-year quarter.  Both of our operating segments reported improved quarterly results compared to the prior year.  In our natural gas segment, a $3 million improvement over the prior year was due to an increase in operating income combined with higher returns on company-owned life insurance policies."  Hester added, "Construction services results improved nearly $1 million and revenues increased over $40 million between

quarters as we continue to grow our business with existing customers and expand into new markets."  Hester concluded by saying, "During the first half of this year, we received approvals from our regulators in California, Nevada, and Arizona to reorganize as a holding company.  Subject to consents from various third parties and final approval of our Board, the reorganization could become effective as early as the fourth quarter of this year."

For the twelve months ended June 30, 2016, consolidated net income was $145.8 million, or $3.08 per basic share, compared to $137.6 million, or $2.95 per basic share, for the twelve-month period ended June 30, 2015.  Construction services income improved by $15.6 million between periods, while natural gas segment income declined by $7.4 million between periods.

Second Quarter

Operating margin, defined as operating revenues less the cost of gas sold, increased $7 million between quarters.  Combined rate relief in the California jurisdiction and Paiute Pipeline Company provided $2 million in operating margin.  Operating margin attributable to the Nevada conservation and energy efficiency ("Nevada CEE") surcharge, which was implemented in January 2016, provided an additional $2 million.  Amounts collected through the surcharge do not impact net income overall as they also result in an increase in associated amortization expense.  New customers contributed $2 million of the operating margin increase in the second quarter of 2016, as approximately 24,000 net

new customers were added during the last twelve months.  Operating margin associated with infrastructure replacement mechanisms, customers outside the decoupling mechanisms, and other miscellaneous revenues increased $1 million.

Operations and maintenance expenses declined slightly between quarters as pension costs and reductions in legal claims and expenses offset general cost increases.  On a combined basis, depreciation and general taxes increased $4.9 million, or 7%, between quarters primarily due to a 6% increase in average gas plant in service.  In addition, approximately $1.1 million of the increase was due to net changes in amortizations associated with the recovery of regulatory assets.

Other income and deductions increased $2.1 million between quarters primarily due to higher returns associated with the cash surrender values of company-owned life insurance ("COLI") policies in addition to net death benefits recognized.

Twelve Months to Date

Operating margin increased $24 million between periods including $8 million attributable to customer growth and a combined $7 million of rate relief in the California jurisdiction and Paiute Pipeline Company.  Operating margin attributable to the Nevada CEE surcharge implemented in January 2016 was $6 million (a corresponding increase is reflected in amortization expense).  Operating margin associated with infrastructure replacement mechanisms, customers outside the decoupling mechanisms, and other miscellaneous revenues improved $3 million.

Operations and maintenance expenses increased $19.3 million between periods primarily due to general cost increases and higher employee-related medical and pension costs.  Additionally, expenses for pipeline integrity management and damage prevention programs increased by $4.4 million.  Depreciation expense and general taxes (combined) increased $16.9 million, or 7%, primarily due to a 5% increase in average gas plant in service and a $6.4 million increase in amortization related to the recovery of regulatory assets.

Other income decreased $2.1 million between periods.  The current period reflects a $1.3 million increase in COLI policy cash surrender values including recognized net death benefits, while the prior twelve-month period included $3.4 million of COLI-related income.

Second Quarter

Revenues increased $40 million between quarters, primarily due to additional pipe replacement work and incremental work that was able to be completed as a result of favorable weather conditions in several operating areas.  Construction expenses increased $38 million between quarters primarily due to the additional pipe replacement and incremental work noted above.

Depreciation and amortization expense increased $1 million between quarters due to depreciation on new equipment purchased to support the growing volume of work.  Net

interest deductions decreased $308,000 between quarters primarily due to a decline in average outstanding borrowings for the comparative periods.

Twelve Months to Date

Both comparative periods were impacted by a previous Canadian industrial construction project (the prior-year period includes a $7.6 million pretax loss reserve, while the current period includes an approximate $4 million pretax favorable settlement).  Revenues increased $205 million between periods primarily due to additional pipe replacement work in the current period and to incremental revenues from the acquired companies in Canada.  Favorable weather conditions in several operating areas, from late 2015 into early 2016, provided an extended construction season.  Construction expenses increased $178 million between periods due to additional pipe replacement work during the twelve months ended June 30, 2016 and incremental construction costs associated with the acquired Canadian companies.

Depreciation and amortization expense increased $5.1 million between periods primarily due to depreciation of equipment purchased to support additional work and depreciation from the acquired Canadian subsidiaries, mitigated by lower amortization of certain intangible assets in those subsidiaries during the current period.

Natural Gas Segment:

·

Operating margin for 2016 is anticipated to benefit from customer growth (similar to 2015), infrastructure tracker mechanisms, expansion projects, and California attrition.  Combined, these items are expected to produce approximately 3% in incremental margin.  Additionally, new rates established to recover Nevada CEE program costs are expected to increase margin by approximately $11 million, but will be offset by a similar increase in amortization expense.

·

Operations and maintenance expense is expected to increase modestly as compared to 2015 due to increased general costs, pipeline integrity management and damage prevention programs, and costs associated with customer growth.  These increases will be mitigated by a decrease in pension costs.  Depreciation and general taxes should increase consistent with the growth in gas plant in service (approximately 5% to 6%) plus the amortization of Nevada CEE program costs noted above.

·	Operating income is expected to increase by 3% to 4% between years.

·	Net interest deductions for 2016 are expected to be approximately $2 million to $4 million higher than 2015, primarily due to an anticipated increase in average outstanding debt associated with the financing of capital expenditures.

·	Changes in cash surrender values of COLI policies will continue to be subject to volatility.  Management generally anticipates longer term normal increases in COLI cash surrender values to range from $3 million to $5 million on an annual basis.

·	Capital expenditures in 2016 are estimated at $460 million, in support of customer growth, system improvements, and accelerated pipe replacement programs.

Construction Services Segment:

·	Centuri has a strong base of large utility clients (many with multi-year pipe replacement programs) that can sustain and grow its business.  Revenues for 2016 are anticipated to be 7% to 10% greater than 2015 levels.

·	Operating income is expected to be approximately 5% to 5.5% of revenues.

·	Based on the current interest rate environment, net interest deductions for 2016 are expected to be between $6.5 million and $7.5 million.

·	These collective expectations are before consideration of the portion of earnings attributable to the noncontrolling interests.  Additionally, changes in foreign exchange rates could influence results.

Southwest Gas Corporation provides natural gas service to 1,962,000 customers in Arizona, Nevada, and California.

This press release may contain statements which constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 (Reform Act).  All such forward-looking statements are intended to be subject to the safe harbor protection provided by the Reform Act.  A number of important factors affecting the business and financial results of the Company could cause actual results to differ materially from those stated in the forward-looking statements.  These factors include, but are not limited to, the timing and amount of rate relief, changes in rate design, customer growth rates, the effects of regulation/deregulation, the impacts of construction activity at Centuri, future earnings trends, seasonal patterns, and the impacts of stock market volatility.  In addition, the Company can provide no assurance that its discussions about future operating margin, operations and maintenance expenses, operating income, depreciation and general taxes, COLI cash surrender values, financing expenses, and capital expenditures of the natural gas segment will occur.  Likewise, the Company can provide no assurance that discussions regarding construction services segment revenues, operating income, and net interest deductions will transpire. The statements in this press release are made as of the

 date of this press release, even if subsequently made available by the Company on its Web site or otherwise.  The Company does not assume any obligation to update the forward-looking statements provided to reflect events that occur or circumstances that exist after the date on which they were made.

SOUTHWEST GAS CONSOLIDATED EARNINGS DIGEST

(In thousands, except per share amounts)

 

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SOUTHWEST GAS CORPORATION
SELECTED STATISTICAL DATA
JUNE 30, 2016
FINANCIAL STATISTICS
Market value to book value per share at quarter end			227	%
Twelve months to date return on equity  -- total company			9.1	%
-- gas segment			7.5	%
Common stock dividend yield at quarter end			2.3	%
Customer to employee ratio at quarter end (gas segment)		889 to 1
GAS OPERATIONS SEGMENT
										Authorized
		Authorized				Authorized				Return on
		Rate Base				Rate of				Common
Rate Jurisdiction		(In thousands)				Return				Equity
Arizona		$	1,070,117				8.95	%			9.50		%
Southern Nevada			825,190				6.46				10.00
Northern Nevada			115,933				7.88				9.30
Southern California			159,277				6.83				10.10
Northern California			67,620				8.18				10.10
South Lake Tahoe			25,389				8.18				10.10
Paiute Pipeline Company (1)			87,158				8.46				11.00
(1) Estimated amounts based on rate case settlement.
SYSTEM THROUGHPUT BY CUSTOMER CLASS
		SIX MONTHS ENDED								TWELVE MONTHS ENDED
		JUNE 30,								JUNE 30,
(In dekatherms)			2016				2015				2016				2015
Residential			45,797,775				39,630,000				71,709,842				61,048,500
Small commercial			17,569,917				16,223,782				29,857,918				27,568,950
Large commercial			4,983,834				5,083,540				9,128,712				9,301,557
Industrial / Other			1,570,129				1,604,221				3,063,175				3,361,568
Transportation			47,775,900				44,230,157				107,116,483				94,481,935
Total system throughput			117,697,555				106,771,700				220,876,130				195,762,510
HEATING DEGREE DAY COMPARISON
Actual			1,149				899				1,761				1,332
Ten-year average			1,250				1,264				1,779				1,777
Heating degree days for prior periods have been recalculated using the current period customer mix.