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                                                                   EXHIBIT 21.01


                            SOUTHWEST GAS CORPORATION

                     LIST OF SUBSIDIARIES OF THE REGISTRANT
                              AT DECEMBER 31, 1999



                                                       STATE OF INCORPORATION
SUBSIDIARY NAME                                         OR ORGANIZATION TYPE
- ---------------                                      ---------------------------
                                                  
LNG Energy, Inc.                                               Nevada
Paiute Pipeline Company                                        Nevada
Northern Pipeline Construction Co.                             Nevada
Southwest Gas Transmission Company                       Partnership between
                                                      Southwest Gas Corporation
                                                     and Utility Financial Corp.
Southwest Gas Capital I                                        Delaware
Utility Financial Corp.                                        Nevada