CONTOUR VALUES IN FEET 



1 23 

 SCALE IN KILOMETER 



CEREN-GE 



Figure 10. Isopach map of fill materials. Data are based on bathy metric differences between 

 the 1845 hydrographic survey (Fig. 9) and the National Ocean Survey chart 

 1215. (See Figure 4.) Dash-lines east and southeast of Scotland Light, used as a 

 navigation landmark, show dump sites for the years indicated. Note area of 

 maximum fill is in thalweg of Hudson Channel (heavy dash-line). Crossmarks 

 denote contemporary waste disposal sites. 



34 



