<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S CONDENSED CONSOLIDATED FINANCIAL STATEMENTS INCLUDED IN ITS QUARTERLY
REPORT ON FORM 10-Q FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2000 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                          16,645
<SECURITIES>                                         0
<RECEIVABLES>                                  454,735<F1>
<ALLOWANCES>                                    72,659<F2>
<INVENTORY>                                     31,094
<CURRENT-ASSETS>                               496,844
<PP&E>                                       1,866,787
<DEPRECIATION>                                 775,265
<TOTAL-ASSETS>                               1,966,780
<CURRENT-LIABILITIES>                          351,279
<BONDS>                                        754,781
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        11,038
<OTHER-SE>                                     641,066
<TOTAL-LIABILITY-AND-EQUITY>                 1,966,780
<SALES>                                      1,301,341
<TOTAL-REVENUES>                             1,302,815
<CGS>                                                0
<TOTAL-COSTS>                                1,189,071
<OTHER-EXPENSES>                                50,714
<LOSS-PROVISION>                                     0<F3>
<INTEREST-EXPENSE>                              39,931
<INCOME-PRETAX>                                 23,099
<INCOME-TAX>                                     8,316
<INCOME-CONTINUING>                             14,783
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    14,783
<EPS-BASIC>                                       0.15
<EPS-DILUTED>                                     0.15
<FN>
<F1>Excludes $5,070 of long-term accounts and notes receivable.
<F2>Excludes $3,711 of allowance for doubtful long-term accounts and notes
receivable.
<F3>Included in Total costs and expenses line.
</FN>