<ARTICLE> 5
<LEGEND>
EXHIBIT 27

The schedule contains summarized financial information extracted from the
Questar Corporation and subsidiaries consolidated Statements of Income and
Balance Sheet for the period ended June 30, 2000, and is qualified in its
entirety by reference to such unaudited financial statements.

<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                          19,559
<SECURITIES>                                         0
<RECEIVABLES>                                  172,198
<ALLOWANCES>                                         0
<INVENTORY>                                     26,616
<CURRENT-ASSETS>                               228,888
<PP&E>                                       3,413,170
<DEPRECIATION>                               1,542,561
<TOTAL-ASSETS>                               2,296,786
<CURRENT-LIABILITIES>                          308,496
<BONDS>                                        764,704
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       257,361
<OTHER-SE>                                     697,875
<TOTAL-LIABILITY-AND-EQUITY>                 2,296,786
<SALES>                                              0
<TOTAL-REVENUES>                               569,244
<CGS>                                           11,299
<TOTAL-COSTS>                                  335,086
<OTHER-EXPENSES>                                95,670
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              31,842
<INCOME-PRETAX>                                120,091
<INCOME-TAX>                                    43,656
<INCOME-CONTINUING>                             76,435
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    76,435
<EPS-BASIC>                                        .95
<EPS-DILUTED>                                      .95