mound oriented slightly from northwest to southeast. The minimum depth in the 



northwest was 20 meters and in the southeast 18.5 meters. Because the first 



spoils to be dredged under the Phase II program were to be of the worst quality 



from the dock areas, it was decided to dispose of them just northeast of the 



southern portion of the mound, so that they would be covered by cleaner spoils. 

 In order to accomplish this, a second buoy was positioned at the suggested 



disposal point. 



The second survey (Fig. F-3) on September 12, 1977, indicated that this 

 technique had been successful. There was a distinctive build-up of the mound 

 northeast of 41016'N, 7204. 8'W, the center of the southeast portion of the 

 original mound. 



This build-up extended east to 72^4. 6' W and north to 41016.TN. However, 

 because of the concentrated disposal effort that began in June, 1977 the top 

 of the mound had reached a minimum depth of 14 meters by September. Although 

 this adequately covered the poor quality spoils, the minimum depth is above a 

 safe limit relative to effects of wave action. Consequently, NUSC initiated 

 movement of the disposal point northward and scheduled an additional survey 

 on October 26, 1977, to investigate the effects of this action. 



The resulting survey (Fig. F-4) indicated a corresponding northward shift 



of the spoil boundary in the affected area close to 16°2'N. The minimum depth 

 increased to 16 meters, probably due to a combination of compaction and winnow- 

 ing at the shallower depths. 



Following the October survey dumping continued at the new disposal point 

 until a fourth survey was made on March 8, 1978 (Fig. F-5(a-k)). This was 

 the first New London Survey to make use of the updated BDAS system. Although 

 the rate of disposal was less during this period, the build-up at the designated 

 point was readily apparent. The mound changed to a triangular shaped pile with 



