76 



id Disposal Site Roya! River Project Area 

 Precap RE8VI0TS® Survey Stations over 

 Precap Bathymetry 



Disposal Site 

 Boundary 



43° 34.000' 



43° 33.800' 



43° 33.600' 



70° 01 .800' W 



70° 01 .600' W 



Precap REMOTS® Station 



▲ # Fresh DM Thickness (cm) 

 NP (No Penetration) 



A # Historic DM Thickness (cm) 



> Indicates greater than 



Camera Penetration 



Detection of 



Pseudo-UDM 



>10 cm depth 



2-10 cm depth 



70° 01.400' W 



Om 



200 m 



Figure 4-15. Thickness of pseudo-UDM measured by REMOTS® data overlaid on precap 



bathymetric chart (NAD 27), 1.0 m contour interval (MLLW) 



The Portland Disposal Site Capping Demonstration Project, 1995-1997 



