93 



43" 34.000' N 



43' 33.800' N 



Portland Disposal Site Royal River Project Area 



Postcap REMOTS® Survey Stations over 



Postcap Bathymetry 



43° 33.600' N- 



Disposal Site 

 Boundary 



70° 01 .800' W 



70° 01.600' W 



Postcap REMOTS® Station 



# Cap Thickness (cm) 

 ^ NP (Wo Penetration) 



> Indicates greater than 

 camera penetration 



Detection of CDM 



— — 10-20 cm depth 

 ._„- 2-10 cm depth 



70° 01 .400' W 



m 200 m 



Figure 4-22. Thickness of CDM measured by REMOTS® data overlaid on postcap 

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



The Portland Disposal Site Capping Demonstration Project, 1995-1997 



