<ARTICLE> 5
<LEGEND> This schedule contains summary financial information extracted from 
the Consolidated Balance Sheet, Consolidated Statement of Operations and 
Consolidated Statement of Cash Flows included in the Company's Form 10-Q for the
period ending June 30, 1997, and is qualified in its entirety by reference to 
such financial statements. 
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                         DEC-31-1997
<PERIOD-START>                            JAN-01-1997
<PERIOD-END>                              JUN-30-1997
<CASH>                                         14,131 
<SECURITIES>                                        0 
<RECEIVABLES>                                 125,213 
<ALLOWANCES>                                 (10,025) 
<INVENTORY>                                    33,953 
<CURRENT-ASSETS>                                    0       
<PP&E>                                     18,954,180
<DEPRECIATION>                            (5,987,618)
<TOTAL-ASSETS>                                196,858      
<CURRENT-LIABILITIES>                               0    
<BONDS>                                        84,526  
<PREFERRED-MANDATORY>                               0 
<PREFERRED>                                         0 
<COMMON>                                          188 
<OTHER-SE>                                     65,880       
<TOTAL-LIABILITY-AND-EQUITY>                  196,858         
<SALES>                                        40,083          
<TOTAL-REVENUES>                               60,497          
<CGS>                                           9,276          
<TOTAL-COSTS>                                  27,563          
<OTHER-EXPENSES>                                    0       
<LOSS-PROVISION>                                2,809      
<INTEREST-EXPENSE>                              4,201       
<INCOME-PRETAX>                                 9,029       
<INCOME-TAX>                                   16,004      
<INCOME-CONTINUING>                           (6,975)      
<DISCONTINUED>                                      0  
<EXTRAORDINARY>                                 (825)      
<CHANGES>                                           0  
<NET-INCOME>                                  (7,800) 
<EPS-PRIMARY>                                  (0.45) 
<EPS-DILUTED>                                       0