<ARTICLE> 5
<CIK>    0000885538
<NAME>   GREAT LAKES DREDGE & DOCK CORP.
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   6-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1997
<PERIOD-START>                             JAN-01-1998             JAN-01-1997
<PERIOD-END>                               JUN-30-1998             DEC-31-1997
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