MASSACHUSETTS BAY DISPOSAL SITES 



Two disposal sites are located in Massachusetts Bay; the Boston Foul 

 Hround (Fig. D-1 ) located approximately 21 NM ENE of Boston, and the Boston 

 Liqhtship Disposal Area (Fig. D-2) located 17 NM east of Boston. The "foul 

 ground" has been used for disposal of material for many years, however, point 

 dumping has never been used and spoils, wrecks, munitions etc. are spread 

 extensively throughout the area. The site is currently in use at various 

 times for disposal of spoils. At the lightship ground disposal of spoils was 

 spread throughout the area, but recent dumping has been confined to the vicin- 

 ity of the disposal buoy. Both clean and polluted spoils have been dumped in 

 this area, and although no spoil mound is present a great deal of timbers, build- 

 ing material and rocks are present. .- 



The most recent large project using the Boston Light ground was the Wey- 

 mouth-Fore and Town River dredging in which 6,700,000 cu. yd. of sediment were 

 dumped from May 1970 - March 1973 and about 115,000 cu . yd. of spoil from rocky 

 areas were dumped in 1974-75. Recently, highly polluted material dredged from 

 the Charles River Dam project was disposed of at the foul ground. 



Bathymetry 



Navigation control for both disposal sites was provided by trisponder 



stations installed at the Gloucester Lighthouse and the Long Island Lighthouse 

 at the entrance to Boston Harbor. Bathymetric surveys were made at the Boston 



Foul Ground in January (Fig. D-3 (a-g)) and May, 1978 (Fig. D-4 (a-g)). Surveys 



at the Lightship were conducted in December, 1977, (Fig. D-5 (a-g)) and May, 



1978 ("ig. D-6 (a-g)). Because of the large size of both these disposal sites 



