LIST OF FIGURES (continued) 



Page 



Figure 4-13. Three-dimensional view of the 800 m x 800 m survey area over 



Portland Disposal Site, showing patterns of accumulation and survey 

 artifacts with respect to bathymetric features 73 



Figure 4-14. REMOTS® photographs collected during the November 1996 UDM 

 survey showing color and consistency of Royal River dredged 

 material (pseudo-UDM) 75 



Figure 4-15. Thickness of CDM measured by REMOTS® and core data overlaid on 



a postcap bathymetric chart of (NAD 27), 1.0 m contour interval 76 



Figure 4-16. REMOTS® photographs collected at Stations 100 N and 200 W 



showing multiple sediment strata visible in the top 20 cm 77 



Figure 4-17. REMOTS® photographs collected at Station 300 SE and 100 N 



showing evidence of rapid recolonization one week after postdisposal 78 



Figure 4-18. Mean grain size analysis results for precap (UDM) grab samples and 



postcap (CDM) core samples 79 



Figure 4-19. Histogram displaying mean mineralogical sediment composition 



within the fine fraction 85 



Figure 4-20. Histograms showing relative abundance and density of microfossils 

 collected within the ten processed grab samples (methanol [ME] and 

 formalin [F] at 5 ONE only) 86 



Figure 4-21. Depth difference comparison of the January 1997 CDM survey versus 

 the February 1996 baseline survey relative to the pseudo-UDM 

 footprint (red) 88 



Figure 4-22. Thickness of pseudo-UDM measured by REMOTS® and core data 

 overlaid on a postcap bathymetric chart (NAD 27), 1.0 m contour 

 interval 93 



Figure 4-23. REMOTS® photographs collected at Stations 200 S and 200 NW as 

 part of the January 1997 CDM survey showing multiple sediment 

 strata within the top 20 cm 94 



