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7.0 CONCLUSIONS 



From 1985 to 1990, regular bathymetric surveying of dredged material mounds at 

 disposal sites by the DAMOS Program has shown that the dredged material mounds are 

 physically stable. At all sites, dredged material was detected by the REMOTS® sediment- 

 profiling camera either extending from the base of an acoustically detected dredged material 

 mound or, where no mound was detected, as a thin deposit of dredged material. 



Any contamination detected in sampling of the dredged material disposal sites was 

 low to moderate by NERBC classification and was related to the contamination level found in 

 the actual project material (tested prior to dredging). Transect studies and biological 

 sampling detected neither the transport of contaminants nor biological uptake. 



In 1990, DAMOS field activities continued, concentrating on monitoring of recently 

 formed dredged material disposal mounds. Highlights of 1990 activities not related to work 

 in the field include review of the Capping Model, maintenance of the DAMOS database, and 

 several meetings of the TAC. Analysis of the DAMOS Capping Model indicated that 

 prediction of mound height was most reliable with a center-weighted distribution of dredged 

 material, and that consolidation should be incorporated into the model for accurate long-term 

 height prediction (Wiley 1994). The TAC workshops developed a tiered monitoring plan 

 which can be used as a long-term management strategy for the disposal of dredged material. 



DAMOS Summary Report, 1985-1990 



