<ARTICLE> 5
<CIK>   0001088866
<NAME>  CAITHNESS COSO FUNDING CORP.
<MULTIPLIER> 1,000

                                                  
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<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1999
<PERIOD-START>                             JAN-01-1998             JAN-01-1999
<PERIOD-END>                               DEC-31-1998             JUN-30-1999
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