<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED CONSOLIDATED BALANCE SHEETS AT JUNE 30, 1999 AND THE UNAUDITED
CONSOLIDATED STATEMENTS OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 1999 AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                           7,983
<SECURITIES>                                         0
<RECEIVABLES>                                   53,360
<ALLOWANCES>                                   (1,315)
<INVENTORY>                                        184
<CURRENT-ASSETS>                                74,624
<PP&E>                                       1,583,721
<DEPRECIATION>                               (475,175)
<TOTAL-ASSETS>                               1,267,063
<CURRENT-LIABILITIES>                           60,192
<BONDS>                                        629,637
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           401
<OTHER-SE>                                     482,890
<TOTAL-LIABILITY-AND-EQUITY>                 1,267,063
<SALES>                                        128,461
<TOTAL-REVENUES>                               131,852
<CGS>                                           31,453
<TOTAL-COSTS>                                  126,670
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              20,247
<INCOME-PRETAX>                                  5,182
<INCOME-TAX>                                     2,176
<INCOME-CONTINUING>                              3,006
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,006
<EPS-BASIC>                                        .07
<EPS-DILUTED>                                      .07