<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
unaudited consolidated balance sheet at June 30, 1998 and the unaudited
consolidated statement of operations for the six months ended June 30, 1998
and is qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                           6,150
<SECURITIES>                                         0
<RECEIVABLES>                                   69,760
<ALLOWANCES>                                   (1,047)
<INVENTORY>                                      1,602
<CURRENT-ASSETS>                                83,240
<PP&E>                                       1,520,701
<DEPRECIATION>                               (370,759)
<TOTAL-ASSETS>                               1,241,719
<CURRENT-LIABILITIES>                           79,620
<BONDS>                                        586,979
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           401
<OTHER-SE>                                     456,693
<TOTAL-LIABILITY-AND-EQUITY>                 1,241,719
<SALES>                                        137,395
<TOTAL-REVENUES>                               139,947
<CGS>                                           34,065
<TOTAL-COSTS>                                  160,117
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              20,418
<INCOME-PRETAX>                               (20,170)
<INCOME-TAX>                                   (7,736)
<INCOME-CONTINUING>                           (12,434)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (12,434)
<EPS-PRIMARY>                                    (.31)
<EPS-DILUTED>                                    (.31)