121 



Portland Disposal Site Royal River Project Area 



Detection of Pseudo-UDM at Postcap Core 



and Precap REMOTS® 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 



Detection of Pseudo-UDM 



# Fresh DM Thickness (cm) 





NP (No PeneUation) 

 A # Historic DIVI Thickness (cm) 





> Indicates greater than 

 camera penetration 



" - " ' 2-5 cm depth 



Postcap Core Location 





<3> NA (Not Available) 





# Pseudo-UDM Thickness (cm) 





zoom 



Figure 5-1. Thickness of pseudo-UDM measured by REMOTS® and core data overlaid 

 on a postcap bathymetric cha rt (NAD 27), 1.0 m contour interval (MLLW) 



The Portland Disposal Site Capping Demonstration Project, 1995-1997 



