Because the ambient sediment at CSDS is sand, the fine-grained dredged material that 

 formed the disposal mound at buoy location B was seen very clearly in the May 1992 

 REMOTS® photographs. On the flanks of the fine-grained disposal mound, the REMOTS® 

 photographs showed a thin layer of sand (< 10 cm) covering the mud. At further distances 

 from the center of the mound, ripples on the surface of the sand appeared in the REMOTS® 

 photographs. The apparent movement of sand over the mud contributed to the evidence for 

 active bed transport at CSDS. Additional evidence for active bed transport included optical 

 backscatter and transmissometer data. 



The present investigation, conducted 5-10 August 1992, was designed to assess any 

 further sediment transport, particularly the movement of sand over mud. It was expected 

 that the two disposal mounds detected by earlier surveys would have remained stable and that 

 the extent and thickness of the sand veneer over the fine-grained dredged material would be 

 detectable using subbottom profiling. 



Monitoring Cruise at the Cornfield Shoals Disposal Site, August 1992 



