Pricing Supplement Dated September 18, 1997 Rule 424(b)(3) (To Prospectus dated November 4, 1996 and File No. 333-14605 Prospectus Supplement dated December 30, 1996) SOUTHWEST GAS CORPORATION MEDIUM-TERM NOTES, SERIES A FIXED RATE ================================================================================ Principal Amount: $12,500,000 Interest Rate: 6.89% Agents' Discounts or Commissions: .625% Stated Maturity Date: 09/24/2007 Net Proceeds to Issuer: $12,421,875 Original Issue Date: 09/23/1997 ================================================================================ Interest Payment Dates: Payable from September 23, 1997 on the 1st of each April and October commencing 04/01/1998 per the Prospectus Supplement dated December 30, 1996. Day Count Convention: [X] 30/360 for the period from 06/04/1997 to 06/04/2027 [ ] Other Redemption: [X] The Notes cannot be redeemed prior to the Stated Maturity Date. [ ] The Notes may be redeemed prior to the Stated Maturity Date. Initial Redemption Date: Initial Redemption Percentage: Annual Redemption Percentage Reduction: ___% until Redemption Percentage is 100% of the principal amount. Optional Repayment: [X] The Notes cannot be repaid prior to the Stated Maturity Date. [ ] The Notes can be repaid prior to the Stated Maturity Date at the option of the holder of the Notes. Optional Repayment Dates: Repayment Price: ___% Original Issue Discount: [ ] Yes [X] No Total Amount of OID: Yield to Maturity: Initial Accrual Period: Form: [X] Book-Entry [ ] Certificated Agents: [X] PaineWebber Incorporated $12,500,000 Agent acting in the capacity as indicated below: [X] Agent [ ] Principal If as principal: [ ] The Notes are being offered at varying prices related to prevailing market prices at the time of resale. [ ] The Notes are being offered at a fixed initial public offering price of __% of principal amount. If as Agent: The Notes are being offered at a fixed initial public offering price of 100% of Principal Amount. Other Provisions: N/A