- -------------------------------------------------------------------------------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 27, 1999 SOUTHWEST GAS CORPORATION (Exact name of registrant as specified in its charter) California 1-7850 88-0085720 (State or other jurisdiction of (Commission (I.R.S. Employer incorporation or organization) File Number) Identification No.) 5241 Spring Mountain Road Post Office Box 98510 Las Vegas, Nevada 89193-8510 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (702) 876-7237 - --------------------------------------------------------------------------------Item 5. Other Events A new Procedural Order has been issued by the Arizona Corporation Commission (ACC) further extending the hearing on the proposed merger of Southwest Gas Corporation into a wholly owned subsidiary of ONEOK, Inc. to February 11, 2000. On October 12, 1999, the ACC staff requested an additional eight weeks to review the voluminous information filed in this matter, as well as conduct additional discovery. The ACC granted staff's request and ordered a report and updated recommendations be filed by staff on or before January 4, 2000. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. SOUTHWEST GAS CORPORATION Date: October 27, 1999 /s/ EDWARD A. JANOV -------------------------------------------------- Edward A. Janov Vice President/Controller/Chief Accounting Officer