<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
EPS RESTATED TO COMPLY WITH SFAS 128
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>                 <C>                 <C>                 <C>                 <C>
<PERIOD-TYPE>                   12-MOS              12-MOS              3-MOS               6-MOS               9-MOS
<FISCAL-YEAR-END>               DEC-31-1995         DEC-31-1996         DEC-31-1996         DEC-31-1996         DEC-31-1996
<PERIOD-START>                  JAN-01-1995         JAN-01-1996         JAN-01-1996         JAN-01-1996         JAN-01-1996
<PERIOD-END>                    DEC-31-1995         DEC-31-1996         MAR-31-1996         JUN-30-1996         SEP-30-1996
<CASH>                               17,906              35,816              12,163              12,362              10,765
<SECURITIES>                              0                   0                   0                   0                   0
<RECEIVABLES>                       267,158             295,860             267,998             270,990             269,276
<ALLOWANCES>                          7,750               8,345               7,875               7,915               7,990
<INVENTORY>                          33,792              34,761              33,039              35,645              35,221
<CURRENT-ASSETS>                    352,128             415,222             345,857             350,836             344,607
<PP&E>                            1,582,481           1,695,730           1,612,119           1,662,780           1,711,118
<DEPRECIATION>                      739,778             829,103             775,404             808,162             844,604
<TOTAL-ASSETS>                    1,217,384           1,307,422           1,211,361           1,230,548           1,234,985
<CURRENT-LIABILITIES>               260,529             273,765             247,310             248,436             241,435
<BONDS>                             479,621             524,440             487,736             493,649             501,061
<PREFERRED-MANDATORY>                 3,948                   0               3,948                   0                   0
<PREFERRED>                               0                   0                   0               3,948               3,948
<COMMON>                             42,796<F1>          43,243<F1>          42,889<F1>          42,899<F1>          42,899<F1>
<OTHER-SE>                          363,519<F1>         388,587<F1>         363,554<F1>         372,687<F1>         375,739<F1>
<TOTAL-LIABILITY-AND-EQUITY>      1,217,384           1,307,422           1,211,361           1,230,548           1,234,985
<SALES>                                   0                   0                   0                   0                   0
<TOTAL-REVENUES>                  2,239,351           2,484,306             597,909           1,220,307           1,832,334
<CGS>                                     0                   0                   0                   0                   0
<TOTAL-COSTS>                     2,170,370           2,405,125             587,189           1,183,772           1,779,375
<OTHER-EXPENSES>                          0                   0                   0                   0                   0
<LOSS-PROVISION>                          0                   0                   0                   0                   0
<INTEREST-EXPENSE>                   29,347              33,236               8,341              16,532              24,875
<INCOME-PRETAX>                      39,634              45,945               2,379              20,003              28,084
<INCOME-TAX>                         15,814              18,500               1,065               8,000              11,370
<INCOME-CONTINUING>                       0                   0                   0              12,003              16,714
<DISCONTINUED>                            0                   0                   0                   0                   0
<EXTRAORDINARY>                           0                   0                   0                   0                   0
<CHANGES>                                 0                   0                   0                   0                   0
<NET-INCOME>                         23,820              27,445               1,246              11,867              16,509
<EPS-PRIMARY>                          0.56<F1><F2>        0.64<F1><F2>        0.03<F1><F2>        0.25<F1><F2>        0.11<F1><F2>
<EPS-DILUTED>                          0.55<F1><F3>        0.64<F1><F3>        0.03<F1><F3>        0.25<F1><F3>        0.11<F1><F3>

<FN>
<F1> RESTATED TO REFLECT TWO-FOR-ONE STOCK SPLIT COMPLETED FEBRUARY 1998.
<F2> EARNINGS PER SHARE - BASIC (IN COMPLIANCE WITH SFAS 128)
<F3> EARNINGS PER SHARE - DILUTED (IN COMPLIANCE WITH SFAS 128)
</FN>
        


</TABLE>