<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
FORM 10-K MARCH 31, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.

<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                          48,435
<SECURITIES>                                         0
<RECEIVABLES>                                  402,386
<ALLOWANCES>                                         0
<INVENTORY>                                     84,614
<CURRENT-ASSETS>                                     0
<PP&E>                                       2,561,110
<DEPRECIATION>                               1,178,448
<TOTAL-ASSETS>                               3,125,225
<CURRENT-LIABILITIES>                                0
<BONDS>                                      1,137,840
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        10,563
<OTHER-SE>                                     574,731
<TOTAL-LIABILITY-AND-EQUITY>                 3,125,225
<SALES>                                        188,816
<TOTAL-REVENUES>                             1,683,370
<CGS>                                          111,975
<TOTAL-COSTS>                                1,499,091
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                 4,601
<INTEREST-EXPENSE>                              81,532
<INCOME-PRETAX>                                102,747
<INCOME-TAX>                                    36,922
<INCOME-CONTINUING>                             65,825
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                    334
<CHANGES>                                            0
<NET-INCOME>                                    65,491
<EPS-BASIC>                                       2.37
<EPS-DILUTED>                                     2.36

<F1>THE VALUE FOR RECEIVABLES REPRESENTS THEIR AMOUNT NET OF THEIR ALLOWANCES.
<F2>AN UNCLASSIFIED BALANCE SHEET EXISTS IN THE REGISTRANT'S FINANCIAL STATEMENTS.