LIST OF FIGURES 



Page 



Figure 1-1. Location of Massachusetts Bay Disposal Site (MBDS) in 



relation to Boston Harbor and Gloucester, MA 3 



Figure 1-2. Bathymetric contour chart (depth in meters) of MBDS, 



November 1988 4 



Figure 1-3. Bathymetric contour chart (depth in meters) of active 



disposal point at MBDS, 31 March 1992 6 



Figure 1-4. Depth difference contour chart (in meters) based on the 



comparison of 1990 and 1987 MBDS bathymetry 7 



Figure 1-5. Depth difference contour chart (in meters) based on the 



comparison of 1990 and 1992 MBDS bathymetry 8 



Figure 2-1. Distribution of dredged material at STNH-N 12 



Figure 2-2. Distribution of dredged material at STNH-S 13 



Figure 2-3. Disposal points for cap material at CS-2 with 



distribution of dredged material 14 



Figure 2-4. Disposal points for cap material at CS-1 with 



distribution of dredged material 15 



Figure 3-1. Schematic diagram of the phases encountered during a 



disposal event 17 



Figure 3-2. Area of dredged material mounds formed at Massachusetts Bay, 



Elliott Bay, and Port Gardner Disposal Sites 19 



Figure 3-3. Depth difference (in meters) contour chart based on a 



comparison of 1988 and 1987 MBDS bathymetry 21 



Figure 3-4. Depth difference (in meters) contour chart based on a 



comparison of 1990 and 1988 MBDS bathymetry 22 



Figure 3-5. A plot of the barge release points indicating that the 

 majority of barges released dredged sediment within 

 400 m of the buoy location from 1987 to 1990 23 



iv 



