<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted from the
registrant's unaudited consolidated financial statements as of June 30, 1998,
and the six months then ended, and is qualified in its entirety by reference to
such financial statements.
</LEGEND>
<MULTIPLIER>                                   1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                                                     DEC-31-1998
<PERIOD-END>                                                          MAR-31-1998
<CASH>                                                                      1,083
<SECURITIES>                                                                    0
<RECEIVABLES>                                                             122,614
<ALLOWANCES>                                                                    0
<INVENTORY>                                                                     0
<CURRENT-ASSETS>                                                          123,697
<PP&E>                                                                  1,403,941
<DEPRECIATION>                                                             58,123
<TOTAL-ASSETS>                                                          1,469,515
<CURRENT-LIABILITIES>                                                      41,852
<BONDS>                                                                   635,102
<PREFERRED-MANDATORY>                                                           0
<PREFERRED>                                                                     0
<COMMON>                                                                        0
<OTHER-SE>                                                                792,561
<TOTAL-LIABILITY-AND-EQUITY>                                            1,469,515
<SALES>                                                                   100,109
<TOTAL-REVENUES>                                                          102,048
<CGS>                                                                           0
<TOTAL-COSTS>                                                              52,052
<OTHER-EXPENSES>                                                          (2,661) <F1>
<LOSS-PROVISION>                                                                0
<INTEREST-EXPENSE>                                                         19,742
<INCOME-PRETAX>                                                            32,915
<INCOME-TAX>                                                                    0
<INCOME-CONTINUING>                                                        32,915
<DISCONTINUED>                                                                  0
<EXTRAORDINARY>                                                                 0
<CHANGES>                                                                       0
<NET-INCOME>                                                               32,915
<EPS-PRIMARY>                                                                1.07
<EPS-DILUTED>                                                                1.06
        
<FN>
Included in other expenses are minority interest expense and interest income
</FN>

</TABLE>