operational success of the 1979 capping project, many capped mounds have been 

 developed over the CLIS seafloor. 



Science Applications International Corporation (SAIC) conducted a monitoring 

 survey at CLIS from 10 to 15 July 1996 as part of the DAMOS Program. The field efforts 

 were concentrated over the newly completed CLIS 1995 mound, as well as three historic 

 capped mounds, CLIS 1994 (CLIS 94), New Haven 1993 (NHAV 93), and Mill- 

 Quinnipiac River (MQR). The July 1996 field operations consisted of precision 

 bathymetric and Remote Ecological Monitoring of the Seafloor (REMOTS®) surveys. 



1.2 CLIS 95 



The CLIS 95 mound is the newest bottom feamre at the disposal site and is an 

 example of a small, capped mound. In September 1995, the CDA buoy was deployed at 

 41°08.660' N, 72°53.042' W (NAD 27) approximately 450 m southwest of the historic 

 NHAV 74 mound apex (Figure 1-3). An estimated barge volume of 16,300 m^ of UDM 

 dredged from Milford and Bridgeport Harbors was deposited in close proximity to the 

 CDA 95 buoy, forming a small mound. 



Capping operations commenced on 30 October 1995 and continued through 4 

 March 1996. A total of 50,100 m^ of CDM generated from dredging projects in the West 

 River and Bridgeport Harbor was used to completely isolate the UDM deposit. The end 

 result was a small, stable, completely capped mound yielding a CDM to UDM ratio of 

 3.1:1.0. 



1.3 CLIS 94 



The CLIS 94 mound is another capped mound developed on the CLIS seafloor 

 during the 1994-95 disposal season. A disposal buoy (CDA 94) was positioned in close 

 proximity to the small, historic CS-90-1 mound and received approximately 129,000 m' of 

 UDM dredged from Norwalk and New Haven Harbors. The UDM deposit was then 

 capped with a total of 161,000 m^ of CDM from West River, Stony Creek, and Pine 

 Orchard Marine Terminal. The resulting bottom feature was found to be an irregular- 

 shaped, moderate-sized disposal mound, 630 m northeast of the historic NHAV 93 mound 

 apex (Figure 1-3; Morris 1997). Furthermore, the sediments forming the CLIS 94 mound 

 completely enveloped the historic CS-90-1 mound. 



Monitoring Cruise at the Central Long Island Sound Disposal Site, July 1996 



