<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
 condensed consolidated balance sheets and the condensed consolidated statements
 of earnings at the date and for the period indicated and is qualified in its
 entirety by reference to such financial statements. All amounts shown are in
 thousands of dollars, except per share data.
</LEGEND>
<MULTIPLIER> 1

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          MAR-31-2000
<PERIOD-START>                             APR-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                          73,698
<SECURITIES>                                         0
<RECEIVABLES>                                  197,227
<ALLOWANCES>                                    11,359
<INVENTORY>                                     26,075
<CURRENT-ASSETS>                               289,941
<PP&E>                                       1,542,990
<DEPRECIATION>                                 917,576
<TOTAL-ASSETS>                               1,391,933
<CURRENT-LIABILITIES>                           69,666
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         6,056
<OTHER-SE>                                   1,070,333
<TOTAL-LIABILITY-AND-EQUITY>                 1,391,933
<SALES>                                        154,530
<TOTAL-REVENUES>                               154,530
<CGS>                                          136,135
<TOTAL-COSTS>                                  136,135
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 126
<INCOME-PRETAX>                                 24,209
<INCOME-TAX>                                     7,747
<INCOME-CONTINUING>                             16,462
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    16,462
<EPS-BASIC>                                      .30
<EPS-DILUTED>                                      .30