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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold">As filed with the Securities and Exchange Commission on December 16, 2016</font>&#160;</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; MARGIN-TOP: 8.5pt; LINE-HEIGHT: 11.4pt">UNITED STATES SECURITIES AND EXCHANGE COMMISSION</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">FORM S-8</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">REGISTRATION STATEMENT</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">UNDER</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">THE SECURITIES ACT OF 1933</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">SOUTHWEST GAS CORPORATION</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(Exact name of registrant as specified in its charter)</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">California</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">88-0085720</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">(State or other jurisdiction of</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">(I.R.S. Employer</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">Incorporation or organization)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">Identification No.)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">5241 Spring Mountain Road</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">P.O. Box 98510</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Las Vegas, Nevada 89193-8510</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(Address of principal executive offices)</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Southwest Gas Corporation Employees&#8217; Investment Plan</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(Full title of the Plan)</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">KAREN S. HALLER</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Senior Vice President/General Counsel and Corporate Secretary</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Southwest Gas Corporation</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">5241 Spring Mountain Road</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">P.O. Box 98510</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Las Vegas, Nevada 89193-8510</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(Name and address of agent for service)</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(702) 876-7237</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(Telephone number, including area code, of agent for service)</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company.&#160;&#160;See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer,&#8221; &#8220;non-accelerated filer,&#8221; and &#8220;smaller reporting company&#8221; in Rule 12b-2 of the Exchange Act.</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Large accelerated filer&#160;&#160; <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><u>X&#160;</u></font> &#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160; Accelerated filer&#160;&#160; <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><u>&#160;&#160;&#160;&#160;</u></font> &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Non-accelerated filer&#160;&#160; <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><u>&#160;&#160;&#160;&#160;</u></font> &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; Smaller reporting company&#160;&#160; <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><u>&#160;&#160;&#160;</u></font></div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">CALCULATION OF REGISTRATION FEE</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">Title of Securities to be Registered</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">be registered (1)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">Proposed maximum</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">offering price</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">per share (2)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">aggregate offering</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">price (2)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">Amount of</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">registration fee</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">Common Stock ($1 <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold">&#160;</font> Par Value)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">1,000,000 shares</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt; TEXT-INDENT: 9pt">$75.74</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">$75,740,000</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">&#160;&#160;&#160;&#160; $8,778.27</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">(1)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 12.55pt; MARGIN-RIGHT: 0.8pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the &#8220;Securities Act&#8221;), this Registration Statement includes an indeterminate number of additional shares which may be offered and issued to prevent dilution from stock splits, stock dividends or similar transactions as provided in the above-referenced plan.</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">In addition, pursuant to Rule 416(c) under the Securities Act of 1933, this Registration Statement also covers an indeterminate amount of interests to be offered or sold pursuant to the Plan described herein.</font></div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">(2)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; MARGIN-RIGHT: 0.8pt">Estimated solely for the purpose of calculating the registration fee.&#160;&#160;Pursuant to Rule 457(c) and Rule 457(h) under the Securities Act, the proposed maximum offering price per share and the proposed maximum aggregate offering price have been determined on the basis of the average of the high and low prices reported on the New York Stock Exchange on December 16, 2016.</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">As permitted by Rule 429, the Prospectus with respect to this Registration Statement also relates to Registrant's Registration Statement on Form S-8 (333-155581).</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">PART I</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">The documents containing the information specified in this Part&#160;I of Form&#160;S-8 (plan information and registrant information and employee plan annual information) will be sent or given to employees as specified by Securities and Exchange Commission Rule 428(b)(1).&#160;&#160;Such documents need not be filed with the Securities and Exchange Commission (the &#8220;Commission&#8221;) either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to Rule&#160;424.&#160;&#160;These documents and the documents incorporated by reference in this Registration Statement pursuant to Item&#160;3 of Part&#160;II of this Form&#160;S-8, taken together, constitute a prospectus that meets the requirements of Section&#160;10(a) of the Securities Act of 1933, as amended (the &#8220;Securities Act&#8221;).</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">PART II</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Item 3.&#160;&#160; Incorporation of Documents by Reference.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">The following documents filed by Southwest Gas Corporation (the &#8220;Company&#8221; or the &#8220;Registrant&#8221;) with the Commission are incorporated by reference herein:</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">a.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;The Company&#8217;s Annual Report on Form&#160;10-K for the fiscal year ended December 31, 2015, which includes audited financial statements for the Company&#8217;s latest fiscal year.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">b.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Quarterly Reports on Form 10-Q for the Company&#8217;s quarters ended March 31, 2016, June 30, 2016 and September 30, 2016.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">c.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;The portions of our Definitive Proxy Statement on Schedule 14A (filed on March 31, 2016) that are incorporated into our Annual Report on Form 10-K for the fiscal year ended December 31, 2015.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">d.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Current Reports on Form 8-K filed on February 24, 2016 (Item 8.01), February 29, 2016, April 1, 2016, May 10, 2016, June 30, 2016, August 5, 2016 (Item 5.02), August 5, 2016 (Item 8.01), September 29, 2016 and November 18, 2016, respectively.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">e.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;The description of the Company&#8217;s Common Stock contained in its Form 8-K dated July&#160;22, 2003, and any amendment or report filed for the purpose of updating such description.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">All documents filed by the Company pursuant to Sections&#160;13(a), 13(c), 14 and 15(d) of the Exchange Act after the date of this Registration Statement, and prior to the filing of a post-effective amendment which indicates that all securities offered hereby have been sold or which de-registers all securities then remaining unsold, shall be deemed to be incorporated by reference in this Registration Statement and to be a part hereof from the date of filing of such documents, except as to any portion of any future annual or quarterly report to stockholders or document that is not deemed filed under such provisions.&#160;&#160;Any statement contained in a document incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement.&#160;&#160;Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Item 4.&#160;&#160; Description of Securities.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">The Company&#8217;s Common Stock, $1.00 par value, (the &#8220;Common Stock&#8221;) is registered pursuant to Section 12 of the Exchange Act, and, therefore, the description of securities is omitted.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">The Company's Articles of Incorporation contain a provision which eliminates the liability of directors for monetary damages to the fullest extent permissible under California law.&#160;&#160;The General Corporation Law of California (the &#8220;Law&#8221;) (i) authorizes the elimination of liability of directors for monetary damages in an action brought by a shareholder in the right of the Company or by the Company for breach of a director's duties to the Company and its shareholders and (ii) authorizes the Company to indemnify directors and officers for monetary damages for all acts or omissions committed by them in their respective capacities; provided, however, that liability is not limited nor may indemnification be provided (a) for acts or omissions that involve intentional misconduct or knowing and culpable violation of law, (b) for acts or omissions that a director or officer believes to be contrary to the best interests of the Company or its shareholders or that involve the absence of good faith on the part of a director or officer seeking indemnification, (c) for any transaction from which a director or officer derives an improper personal benefit, (d) for acts or omissions that show a reckless disregard for the director's or officer's duty to the Company or its shareholders in circumstances in which such person was aware, or should have been aware, in the ordinary course of performing his or her duties, of a risk of serious injury to the Company or its shareholders, (e) for acts or omissions that constitute an unexcused pattern of inattention that amounts to an abdication of the director's or officer's duty to the Company or its shareholders, and (f)&#160;for liabilities arising under Section 310 (contracts in which a director has a material financial interest) and Section 316 (certain unlawful dividends, distributions, loans and guarantees) of the Law.&#160;&#160;In addition, the Company may not indemnify directors and officers in circumstances in which indemnification is expressly prohibited by Section 317 of the Law.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">The bylaws of the Company provide that the Company has the power to indemnify directors and officers to the fullest extent permitted under California law and the Company's Articles of Incorporation.&#160;&#160;The Company has entered into indemnification agreements with its directors and officers which require that the Company indemnify such directors and officers in all cases to the fullest extent permitted by applicable provisions of the Law. The Company also maintains a directors' and officers' liability insurance policy insuring directors and officers of the Company for covered losses as defined in the policy.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Item 7.&#160;&#160;&#160;Exemption From Registration Claimed.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">Because the Employees&#8217; Investment Plan (the &#8220;Plan&#8221;) is qualified under Section 401 of the Internal Revenue Code, neither an opinion of counsel concerning compliance with the requirements of the Employee Retirement Income Security Act nor an Internal Revenue Service (&#8220;IRS&#8221;) determination letter are being filed as an exhibit, and the registrant hereby undertakes that it will submit or has submitted to the IRS in a timely manner all amendments necessary to maintain the qualified status of the Plan and has made or will make all changes requited by the IRS in order to maintain the qualification of the Plan.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Item 9.&#160;&#160; Undertakings.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">(a)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;The undersigned Registrant hereby undertakes: (1) to file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement: (i) to include any prospectus required by Section 10(a)(3) of the Securities Act, (ii) to reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this Registration Statement and (iii) to include any material information with respect to the plan of distribution not previously disclosed in this Registration Statement or any material change to such information in this Registration Statement; provided, however, that clauses (1)(i) and (1)(ii) shall not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement; (2) that for the purpose of determining any liability under the Securities Act each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof and (3) to remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">(b)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant&#8217;s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan&#8217;s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">(c)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act, and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">SIGNATURES</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-TOP: 9pt; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 24.5pt">Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Las Vegas, State of Nevada, on December 16, 2016.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">SOUTHWEST GAS CORPORATION</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">By:</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">/s/ John P. Hester</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Name:&#160;</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">John P. Hester</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">President and Chief Executive Officer</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 12pt; LINE-HEIGHT: 11.4pt; TEXT-INDENT: -12pt">Director, President and Chief Executive Officer</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">John P. Hester</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 12pt; LINE-HEIGHT: 11.4pt; TEXT-INDENT: -12pt">(Principal Executive Officer)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; LINE-HEIGHT: 11.4pt">/s/ Roy R. Centrella</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; MARGIN-LEFT: 12pt; LINE-HEIGHT: 11.4pt; TEXT-INDENT: -12pt">Senior Vice President,</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">December 16, 2016</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">December 16, 2016</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">December 16, 2016</div>
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<tr style="HEIGHT: 13px">
<td style="WIDTH: 37.21%; VERTICAL-ALIGN: middle">&#160;</td>
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<td style="WIDTH: 20.57%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
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<tr>
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<td style="WIDTH: 1.78%; VERTICAL-ALIGN: bottom">
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</td>
<td style="WIDTH: 18.22%; VERTICAL-ALIGN: top">
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</td>
</tr>

<tr>
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<td style="WIDTH: 3.11%; VERTICAL-ALIGN: bottom">&#160;</td>
<td style="WIDTH: 38.03%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 1.78%; VERTICAL-ALIGN: bottom">&#160;</td>
<td style="WIDTH: 18.22%; VERTICAL-ALIGN: top">&#160;</td>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;</div>

<div style="LINE-HEIGHT: 12.55pt"><br style="LINE-HEIGHT: 12.55pt">
</div>

<div style="LINE-HEIGHT: 12.55pt"><br style="LINE-HEIGHT: 12.55pt">
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<div style="MARGIN-BOTTOM: 12pt; FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; MARGIN-TOP: 12pt; LINE-HEIGHT: 9.1pt">6<br style="LINE-HEIGHT: 11.4pt">
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<div style="MARGIN-BOTTOM: 12pt; MARGIN-TOP: 12pt; LINE-HEIGHT: 11.4pt">&#160;</div>

<table id="zae11fe27c43a422da59d960168f073d0" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0">
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<td style="WIDTH: 38.35%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 41.65%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
<td style="WIDTH: 20%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
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<tr>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">/s/ Michael J. Melarkey*</div>
</td>
<td style="WIDTH: 3.05%; VERTICAL-ALIGN: bottom">
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</td>
<td style="WIDTH: 2%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;</div>
</td>
<td style="WIDTH: 18%; VERTICAL-ALIGN: top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">December 16, 2016</div>
</td>
</tr>

<tr>
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<td style="WIDTH: 41.65%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
<td style="WIDTH: 20%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
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<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 41.65%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
<td style="WIDTH: 20%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
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<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">/s/ A. Randall Thoman*</div>
</td>
<td style="WIDTH: 3.05%; VERTICAL-ALIGN: bottom">
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</td>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: top">
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</td>
<td style="WIDTH: 2%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;</div>
</td>
<td style="WIDTH: 18%; VERTICAL-ALIGN: top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">December 16, 2016</div>
</td>
</tr>

<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: middle">&#160;A. Randall Thoman</td>
<td style="WIDTH: 41.65%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
<td style="WIDTH: 20%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 41.65%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
<td style="WIDTH: 20%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
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<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">/s/ Thomas A. Thomas*</div>
</td>
<td style="WIDTH: 3.05%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;&#160;</div>
</td>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 12pt; LINE-HEIGHT: 11.4pt; TEXT-INDENT: -12pt">Director</div>
</td>
<td style="WIDTH: 2%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;</div>
</td>
<td style="WIDTH: 18%; VERTICAL-ALIGN: top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">December 16, 2016</div>
</td>
</tr>

<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: middle">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Thomas A. Thomas</div>
</td>
<td style="WIDTH: 41.65%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
<td style="WIDTH: 20%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 41.65%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
<td style="WIDTH: 20%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">/s/ Terrence L. Wright*</div>
</td>
<td style="WIDTH: 3.05%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;&#160;</div>
</td>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 12pt; LINE-HEIGHT: 11.4pt; TEXT-INDENT: -12pt">Director</div>
</td>
<td style="WIDTH: 2%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;</div>
</td>
<td style="WIDTH: 18%; VERTICAL-ALIGN: top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">December 16, 2016</div>
</td>
</tr>

<tr>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: top">&#160;Terrence L. Wright</td>
<td style="WIDTH: 3.05%; VERTICAL-ALIGN: bottom">&#160;</td>
<td style="WIDTH: 38.35%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 2%; VERTICAL-ALIGN: bottom">&#160;</td>
<td style="WIDTH: 18%; VERTICAL-ALIGN: top">&#160;</td>
</tr>
</table>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 10.25pt">&#160;</div>

<table id="z606b466e38a5434eb5f2f4a480f23f99" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 1.97%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 1.27%; VERTICAL-ALIGN: bottom">&#160;</td>
<td style="WIDTH: 35.94%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 61.59%; VERTICAL-ALIGN: middle">&#160;</td>
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<tr style="HEIGHT: 18px">
<td style="WIDTH: 1.97%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 36.76%; VERTICAL-ALIGN: middle" colspan="2">&#160;</td>
<td style="WIDTH: 61.59%; VERTICAL-ALIGN: middle">&#160;</td>
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<tr>
<td style="WIDTH: 1.97%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">*By:</div>
</td>
<td style="WIDTH: 1.27%; VERTICAL-ALIGN: bottom; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;</div>
</td>
<td style="WIDTH: 35.94%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">/s/ Roy R. Centrella</div>
</td>
<td style="WIDTH: 61.59%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px">&#160;</td>
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<tr>
<td style="WIDTH: 1.97%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 1.27%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 8.55pt">&#160;</div>
</td>
<td style="WIDTH: 35.94%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Roy R. Centrella</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Attorney-in-Fact</div>
</td>
<td style="WIDTH: 61.59%; VERTICAL-ALIGN: bottom">&#160;</td>
</tr>
</table>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">&#160;</div>
</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">&#160;</div>

<div style="LINE-HEIGHT: 13.7pt"><br style="LINE-HEIGHT: 13.7pt">
</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 9.1pt">&#160; &#160;7</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 9.1pt">&#160;</div>

<div id="DSPFPageBreakArea" style="MARGIN-BOTTOM: 10pt; CLEAR: both; MARGIN-TOP: 10pt">
<div id="DSPFPageFooter"></div>

<div id="DSPFPageBreak" style="PAGE-BREAK-AFTER: always">
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<div style="MARGIN-BOTTOM: 10pt; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.45pt">The Plan</div>

<div style="LINE-HEIGHT: 13.7pt"><br style="LINE-HEIGHT: 13.7pt">
</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt; TEXT-INDENT: 36pt">Pursuant to the requirements of the Securities Act of 1933, the Southwest Gas Corporation Benefits Committee has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Las Vegas, State of Nevada, on December 16,&#160;2016.</div>

<div style="LINE-HEIGHT: 11.4pt"><br style="LINE-HEIGHT: 11.4pt">
</div>

<div style="LINE-HEIGHT: 13.7pt"><br style="LINE-HEIGHT: 13.7pt">
</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">SOUTHWEST GAS CORPORATION</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">BENEFITS COMMITTEE</div>

<div style="LINE-HEIGHT: 11.4pt"><br style="LINE-HEIGHT: 11.4pt">
</div>

<div style="LINE-HEIGHT: 11.4pt"><br style="LINE-HEIGHT: 11.4pt">
</div>

<table id="z9f1d4c91d20f41fba779b2c9485247ec" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%" cellspacing="0" cellpadding="0">
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<td style="WIDTH: 28.32%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px; BORDER-BOTTOM-COLOR: ">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: bottom; BORDER-BOTTOM: #000000 2px solid; TEXT-ALIGN: center">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; LINE-HEIGHT: 11.4pt">/s/ Roy R. Centrella</div>
</td>
<td style="WIDTH: 28.7%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px; BORDER-BOTTOM-COLOR: ">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: bottom; TEXT-ALIGN: center">&#160;Roy R. Centrella</td>
<td style="WIDTH: 28.7%; VERTICAL-ALIGN: middle">&#160;</td>
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<tr style="HEIGHT: 31px">
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px; BORDER-BOTTOM-COLOR: ">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: bottom; BORDER-BOTTOM: #000000 2px solid; TEXT-ALIGN: center">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; LINE-HEIGHT: 11.4pt">/s/ Jose L. Esparza, Jr.</div>
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<td style="WIDTH: 28.7%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px; BORDER-BOTTOM-COLOR: ">&#160;</td>
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<tr>
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: bottom; TEXT-ALIGN: center">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Jose L. Esparza&#160;</div>
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<td style="WIDTH: 28.7%; VERTICAL-ALIGN: middle">&#160;</td>
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<tr>
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: bottom; TEXT-ALIGN: center">&#160;</td>
<td style="WIDTH: 28.7%; VERTICAL-ALIGN: middle">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px; BORDER-BOTTOM-COLOR: ">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">/s/ Randall P. Gabe</div>
</td>
<td style="WIDTH: 28.7%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px; BORDER-BOTTOM-COLOR: ">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: top; BORDER-BOTTOM-COLOR: ">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: bottom; BORDER-BOTTOM-COLOR: ; TEXT-ALIGN: center">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Randall P. Gabe&#160;</div>
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<td style="WIDTH: 28.7%; VERTICAL-ALIGN: top; BORDER-BOTTOM-COLOR: ">&#160;</td>
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<tr>
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="WIDTH: 28.7%; VERTICAL-ALIGN: middle">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px; BORDER-BOTTOM-COLOR: ">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">/s/ Karen S. Haller</div>
</td>
<td style="WIDTH: 28.7%; VERTICAL-ALIGN: top; PADDING-BOTTOM: 2px; BORDER-BOTTOM-COLOR: ">&#160;</td>
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<tr>
<td style="WIDTH: 28.32%; VERTICAL-ALIGN: top; BORDER-BOTTOM-COLOR: ">&#160;</td>
<td style="WIDTH: 43.37%; VERTICAL-ALIGN: bottom; BORDER-BOTTOM-COLOR: ; TEXT-ALIGN: center">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Karen S. Haller&#160;</div>
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<td style="WIDTH: 28.7%; VERTICAL-ALIGN: top; BORDER-BOTTOM-COLOR: ">&#160;</td>
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<div style="LINE-HEIGHT: 11.4pt"><br style="LINE-HEIGHT: 11.4pt">
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<div style="LINE-HEIGHT: 11.4pt"><br style="LINE-HEIGHT: 11.4pt">
</div>

<div style="LINE-HEIGHT: 13.7pt"><br style="LINE-HEIGHT: 13.7pt">
</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 9.1pt">&#160; 8</div>

<div style="LINE-HEIGHT: 13.7pt"><br style="LINE-HEIGHT: 13.7pt">
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<div style="LINE-HEIGHT: 13.7pt"><br style="LINE-HEIGHT: 13.7pt">
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: right; LINE-HEIGHT: 9.1pt">&#160;</div>

<div style="TEXT-ALIGN: left; LINE-HEIGHT: 13.7pt"><br style="LINE-HEIGHT: 13.7pt">
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<div style="TEXT-ALIGN: left; LINE-HEIGHT: 13.7pt"><br style="LINE-HEIGHT: 13.7pt">
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[{"type": "S-8", "sequence": "1", "filename": "forms-81216eip.htm", "description": "EMPLOYEES' INVESTMENT PLAN", "secsgml_size_bytes": 87639}]
{"company-data": {"conformed-name": "SOUTHWEST GAS CORP", "cik": "0000092416", "assigned-sic": "4923", "irs-number": "880085720", "state-of-incorporation": "CA", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-215145", "film-number": "162056964"}, "business-address": {"street1": "5241 SPRING MOUNTAIN RD", "street2": "PO BOX 98510", "city": "LAS VEGAS", "state": "NV", "zip": "89193-8510", "phone": "7028767083"}, "mail-address": {"street1": "5241 SPRING MOUNTAIN RD", "street2": "PO BOX 98510", "city": "LAS VEGAS", "state": "NV", "zip": "89193-8510"}}
As filed with the Securities and Exchange Commission on December 16, 2016
Registration No. 333-
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
______________________
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
______________________
SOUTHWEST GAS CORPORATION
(Exact name of registrant as specified in its charter)
California
88-0085720
(State or other jurisdiction of
(I.R.S. Employer
Incorporation or organization)
Identification No.)
5241 Spring Mountain Road
P.O. Box 98510
Las Vegas, Nevada 89193-8510
(Address of principal executive offices)
Southwest Gas Corporation Employees' Investment Plan
(Full title of the Plan)
KAREN S. HALLER
Senior Vice President/General Counsel and Corporate Secretary
Southwest Gas Corporation
5241 Spring Mountain Road
P.O. Box 98510
Las Vegas, Nevada 89193-8510
(Name and address of agent for service)
(702) 876-7237
(Telephone number, including area code, of agent for service)
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company.  See the definitions of "large accelerated filer," "accelerated filer," "non-accelerated filer," and "smaller reporting company" in Rule 12b-2 of the Exchange Act.
Large accelerated filer
X
Accelerated filer
Non-accelerated filer
Smaller reporting company
CALCULATION OF REGISTRATION FEE
Title of Securities to be Registered
Amount to
be registered (1)
Proposed maximum
offering price
per share (2)
Proposed maximum
aggregate offering
price (2)
Amount of
registration fee
Common Stock ($1
Par Value)
1,000,000 shares
$75.74
$75,740,000
$8,778.27
(1)
Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the "Securities Act"), this Registration Statement includes an indeterminate number of additional shares which may be offered and issued to prevent dilution from stock splits, stock dividends or similar transactions as provided in the above-referenced plan.
In addition, pursuant to Rule 416(c) under the Securities Act of 1933, this Registration Statement also covers an indeterminate amount of interests to be offered or sold pursuant to the Plan described herein.
(2)
Estimated solely for the purpose of calculating the registration fee.  Pursuant to Rule 457(c) and Rule 457(h) under the Securities Act, the proposed maximum offering price per share and the proposed maximum aggregate offering price have been determined on the basis of the average of the high and low prices reported on the New York Stock Exchange on December 16, 2016.
As permitted by Rule 429, the Prospectus with respect to this Registration Statement also relates to Registrant's Registration Statement on Form S-8 (333-155581).
PART I
INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS
The documents containing the information specified in this Part I of Form S-8 (plan information and registrant information and employee plan annual information) will be sent or given to employees as specified by Securities and Exchange Commission Rule 428(b)(1).  Such documents need not be filed with the Securities and Exchange Commission (the "Commission") either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to Rule 424.  These documents and the documents incorporated by reference in this Registration Statement pursuant to Item 3 of Part II of this Form S-8, taken together, constitute a prospectus that meets the requirements of Section 10(a) of the Securities Act of 1933, as amended (the "Securities Act").
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3.   Incorporation of Documents by Reference.
The following documents filed by Southwest Gas Corporation (the "Company" or the "Registrant") with the Commission are incorporated by reference herein:
a.           The Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2015, which includes audited financial statements for the Company's latest fiscal year.
b.           Quarterly Reports on Form 10-Q for the Company's quarters ended March 31, 2016, June 30, 2016 and September 30, 2016.
c.           The portions of our Definitive Proxy Statement on Schedule 14A (filed on March 31, 2016) that are incorporated into our Annual Report on Form 10-K for the fiscal year ended December 31, 2015.
d.           Current Reports on Form 8-K filed on February 24, 2016 (Item 8.01), February 29, 2016, April 1, 2016, May 10, 2016, June 30, 2016, August 5, 2016 (Item 5.02), August 5, 2016 (Item 8.01), September 29, 2016 and November 18, 2016, respectively.
e.           The description of the Company's Common Stock contained in its Form 8-K dated July 22, 2003, and any amendment or report filed for the purpose of updating such description.
All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act after the date of this Registration Statement, and prior to the filing of a post-effective amendment which indicates that all securities offered hereby have been sold or which de-registers all securities then remaining unsold, shall be deemed to be incorporated by reference in this Registration Statement and to be a part hereof from the date of filing of such documents, except as to any portion of any future annual or quarterly report to stockholders or document that is not deemed filed under such provisions.  Any statement contained in a document incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement.  Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.
Item 4.   Description of Securities.
The Company's Common Stock, $1.00 par value, (the "Common Stock") is registered pursuant to Section 12 of the Exchange Act, and, therefore, the description of securities is omitted.
Item 5.   Interests of Named Experts and Counsel.
Not applicable.
2
Item 6.   Indemnification of Directors and Officers
.
The Company's Articles of Incorporation contain a provision which eliminates the liability of directors for monetary damages to the fullest extent permissible under California law.  The General Corporation Law of California (the "Law") (i) authorizes the elimination of liability of directors for monetary damages in an action brought by a shareholder in the right of the Company or by the Company for breach of a director's duties to the Company and its shareholders and (ii) authorizes the Company to indemnify directors and officers for monetary damages for all acts or omissions committed by them in their respective capacities; provided, however, that liability is not limited nor may indemnification be provided (a) for acts or omissions that involve intentional misconduct or knowing and culpable violation of law, (b) for acts or omissions that a director or officer believes to be contrary to the best interests of the Company or its shareholders or that involve the absence of good faith on the part of a director or officer seeking indemnification, (c) for any transaction from which a director or officer derives an improper personal benefit, (d) for acts or omissions that show a reckless disregard for the director's or officer's duty to the Company or its shareholders in circumstances in which such person was aware, or should have been aware, in the ordinary course of performing his or her duties, of a risk of serious injury to the Company or its shareholders, (e) for acts or omissions that constitute an unexcused pattern of inattention that amounts to an abdication of the director's or officer's duty to the Company or its shareholders, and (f) for liabilities arising under Section 310 (contracts in which a director has a material financial interest) and Section 316 (certain unlawful dividends, distributions, loans and guarantees) of the Law.  In addition, the Company may not indemnify directors and officers in circumstances in which indemnification is expressly prohibited by Section 317 of the Law.
The bylaws of the Company provide that the Company has the power to indemnify directors and officers to the fullest extent permitted under California law and the Company's Articles of Incorporation.  The Company has entered into indemnification agreements with its directors and officers which require that the Company indemnify such directors and officers in all cases to the fullest extent permitted by applicable provisions of the Law. The Company also maintains a directors' and officers' liability insurance policy insuring directors and officers of the Company for covered losses as defined in the policy.
Item 7.   Exemption From Registration Claimed.
Not applicable.
3
Item 8.   Exhibits.
4.1
Employees' Investment Plan
23.1
Consent of PricewaterhouseCoopers LLP
24.1
Power of Attorney
Note:
The opinion of counsel contemplated by Item 601(b)(5)(i) of Regulation S-K is not filed herewith because the shares of common stock being registered are not original issue shares.
Undertaking in lieu of Exhibit:
Because the Employees' Investment Plan (the "Plan") is qualified under Section 401 of the Internal Revenue Code, neither an opinion of counsel concerning compliance with the requirements of the Employee Retirement Income Security Act nor an Internal Revenue Service ("IRS") determination letter are being filed as an exhibit, and the registrant hereby undertakes that it will submit or has submitted to the IRS in a timely manner all amendments necessary to maintain the qualified status of the Plan and has made or will make all changes requited by the IRS in order to maintain the qualification of the Plan.
Item 9.   Undertakings.
(a)           The undersigned Registrant hereby undertakes: (1) to file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement: (i) to include any prospectus required by Section 10(a)(3) of the Securities Act, (ii) to reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this Registration Statement and (iii) to include any material information with respect to the plan of distribution not previously disclosed in this Registration Statement or any material change to such information in this Registration Statement; provided, however, that clauses (1)(i) and (1)(ii) shall not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement; (2) that for the purpose of determining any liability under the Securities Act each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof and (3) to remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.
(b)           The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
4
(c)           Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act, and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.
5
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Las Vegas, State of Nevada, on December 16, 2016.
SOUTHWEST GAS CORPORATION
By:
/s/ John P. Hester
Name:
John P. Hester
Title:
President and Chief Executive Officer
Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated.
Signature
Title
Date
/s/ John P. Hester
Director, President and Chief Executive Officer
December 16, 2016
John P. Hester
(Principal Executive Officer)
/s/ Roy R. Centrella
Senior Vice President,
December 16, 2016
Roy R. Centrella
Chief Financial Officer
(Principal Financial Officer)
/s/ Gregory J. Peterson
Vice President, Controller and
December 16, 2016
Gregory J. Peterson
Chief Accounting Officer
(Principal Accounting Officer)
/s/ Robert L. Boughner*
Director
December 16, 2016
Robert L. Boughner
/s/ José A. Cárdenas*
Director
December 16, 2016
José A. Cárdenas
/s/ Thomas E. Chestnut*
Director
December 16, 2016
Thomas E. Chestnut
/s/ Stephen C. Comer*
Director
December 16, 2016
Stephen C. Comer
/s/ LeRoy C. Hanneman, Jr.*
Director
December 16, 2016
LeRoy C. Hanneman, Jr
/s/ Anne L. Mariucci*
Director
December 16, 2016
Anne L. Mariucci
6
/s/ Michael J. Melarkey*
Chairman of the Board of Directors
December 16, 2016
Michael J. Melarkey
/s/ A. Randall Thoman*
Director
December 16, 2016
A. Randall Thoman
/s/ Thomas A. Thomas*
Director
December 16, 2016
Thomas A. Thomas
/s/ Terrence L. Wright*
Director
December 16, 2016
Terrence L. Wright
*By:
/s/ Roy R. Centrella
Roy R. Centrella
Attorney-in-Fact
7
The Plan
Pursuant to the requirements of the Securities Act of 1933, the Southwest Gas Corporation Benefits Committee has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Las Vegas, State of Nevada, on December 16, 2016.
SOUTHWEST GAS CORPORATION
BENEFITS COMMITTEE
/s/ Roy R. Centrella
Roy R. Centrella
/s/ Jose L. Esparza, Jr.
Jose L. Esparza
/s/ Randall P. Gabe
Randall P. Gabe
/s/ Karen S. Haller
Karen S. Haller
8
INDEX TO EXHIBITS
Exhibit
Number
Document
4.1
Employees' Investment Plan
23.1
Consent of PricewaterhouseCoopers LLP
24.1
Power of Attorney
9