<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM BALANCE
SHEET AS OF DECEMBER 31, 1996, AND STATEMENT OF INCOME FOR SIX MONTHS ENDED 
DECEMBER 31, 1996, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH 
FORM 10-Q DECEMBER 31, 1996.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               DEC-31-1996
<EXCHANGE-RATE>                                      1
<CASH>                                         140,739
<SECURITIES>                                    35,317
<RECEIVABLES>                                   66,370
<ALLOWANCES>                                       198
<INVENTORY>                                      7,071
<CURRENT-ASSETS>                               250,273
<PP&E>                                         731,392
<DEPRECIATION>                                 132,843
<TOTAL-ASSETS>                                 860,597
<CURRENT-LIABILITIES>                          127,092
<BONDS>                                        220,149
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           693
<OTHER-SE>                                     483,369
<TOTAL-LIABILITY-AND-EQUITY>                   860,597
<SALES>                                        120,186
<TOTAL-REVENUES>                               122,702
<CGS>                                           77,240
<TOTAL-COSTS>                                   83,456
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               6,216
<INCOME-PRETAX>                                 83,456
<INCOME-TAX>                                    14,325
<INCOME-CONTINUING>                             24,921
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                   6443
<CHANGES>                                            0
<NET-INCOME>                                    18,478
<EPS-PRIMARY>                                      .29
<EPS-DILUTED>                                      .27