NEW LONDON DISPOSAL SITE 



The New London Disposal Site (Fig. F-1 ) has been the most active disposal 

 site in New England during the past several years. A major dredging project 

 in the Thames River, sponsored by the U.S. Navy, has resulted in the disposal, 

 and subsequent monitoring of large quantities of spoils at this site., Although 

 the first two years of monitoring effort were sponsored by the Navy, a summary . 

 of data is included here as subsequent studies will be conducted under the DAMOS 

 program. • , 



The site is located south of the Thames River and west of Fishers Island 

 Sound in 20-24 meters of water. Sediments in the area are generally fine sand 

 providing a good acoustic reflection. In the northern portion of the disposal , 

 site a "relict" disposal pile is present, formed from previous but unknown - ,. 

 dredqing operations. , ..- -,, . 



Bathymetry 



Navigation control for bathymetric surveys in the New London area is 

 Drovided by shore stations at the New London Lighthouse and at Millstone Point. 

 The navigation grid in this area has been used extensively during the past 

 four years and has proven to be extremely stable and reliable. 



Bathymetric surveys of the New London disposal site have been made almost 

 semi-annually since 1974 in an effort to monitor the development and aerial 

 extent of the spoil mound. 



Following the end of Phase I dredging a survey was made on flarch 10, 1977 

 (Fig. F-2) prior to dredging or disposal ofPhase II spoils. Consequently, 

 this survey provides a baseline description of conditions existing at the site 

 as a result of the Phase I dredging project. The spoil pile was an elliptical 



