<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S CONSOLIDATED FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   12-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996
<PERIOD-START>                             JAN-01-1995             JAN-01-1996
<PERIOD-END>                               DEC-31-1995             MAR-31-1996
<CASH>                                           8,303                   1,879
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   23,016                  25,656
<ALLOWANCES>                                         0                       0
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                32,959                  28,928
<PP&E>                                         236,302                 247,978
<DEPRECIATION>                                  67,204                  70,922
<TOTAL-ASSETS>                                 202,057                 205,984
<CURRENT-LIABILITIES>                           21,448                  27,167
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            79                      79
<OTHER-SE>                                     103,217                 105,813
<TOTAL-LIABILITY-AND-EQUITY>                   202,057                 205,984
<SALES>                                         72,596                  52,921
<TOTAL-REVENUES>                                72,596                  52,921
<CGS>                                           23,543                  36,372
<TOTAL-COSTS>                                   60,536                  46,690
<OTHER-EXPENSES>                                 6,598                   2,106
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                   0                       0
<INCOME-PRETAX>                                  5,462                   4,125
<INCOME-TAX>                                     1,926                   1,529
<INCOME-CONTINUING>                              3,536                   2,596
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     3,536                   2,596
<EPS-PRIMARY>                                     0.45                    0.33
<EPS-DILUTED>                                     0.45                    0.33