Ho'locene deposit which commonly occurs either at or near the surface (less 

 than 2 feet below surface) . 



Willett, et al. (1972) concluded that silt and clay-size sewage, fly 

 ash from Boston Harbor, and dredge spoils constitute much of the modern 

 sediments contributed to the inner shelf in the Boston area. Most inner 

 shelf ICONS cores with surface deposits of silt contained coal fragments, 

 evidence of origin in the harbor area. 



V. SAND RESOURCES 



1. Sandfill Requirements , 



Volume requirements for beach restoration and nourishment work esti- 

 mated for presently authorized Corps of Engineers projects along the 

 coast adjacent to the study area are listed in Table 3. Since initial 

 fill has already been placed on some beaches, only maintenance voliomes 

 are listed. 



Table 3. Beach sandfill requirements in the study region. 



Beach 



Initial fill i 



Annual nourishment 



50-year 

 nourishment 





(yd 3) 



(yd 3) 



(yd3) 



Lynn-Nahant 



172,000 



5,000 



250,000 



Revere 



830,000 



20,000 



1,000,000 



Winthrop 



200,000 



5,000 



250,000 



Quincy Shore 



(Completed) 



10,000 



500,000 



Nantasket 



700,000 



20,000 



1,000,000 



Wessaqusett 



(Completed) 



5,000 



250,000 



North Scituate 



(Completed) 



5,000 



250,000 



Total 



1,902,000 



70,000 



3,500,000 



NOTE: Data from C. Wentworth while at U.S. Army Engineer 

 Division, New England (personal communication, 1975) 



It is estimated that as much as 20 percent additional volumes may be re- 

 quired for initial fill on these beaches due to erosion loss since original 

 studies were made (C. Wentworth, personal communication, 1974) . 



2. Potential Offshore Sand Resources . 



a. General . Only a few deposits of sand suitable for beach fill have 

 been identified within the study limits (Fig. 14). Considering the com- 

 plexity of sediment distribution in the area, it is probable that other 

 suitable deposits, lying between available data points, remain undiscovered. 



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