1-15 



Anticipation of dredging requirtiments for construction of the intake; and 

 discharge structures resulted in the following studies: analyses of 

 sediments to be dredged (NAT, 1971, 1972); alternatives for dredge spoil 

 disposal (NAI, 1972; Gordon, Rhoads and Turekian, 1972); impacts of 

 dredging (Gordon, 1973a) ; and impacts of dredge spoil disposal in Long 

 Island Sound (Gordon, 1973b; Pratt and O'Connor, 1973; Rhoads, 1972a, 

 1973b) . 



During New Haven Harbor Station construction, observed seagull 

 mortality at the construction site led to a brief pathological study 

 which concluded that the deaths were due to Aspergillosis, a contagious 

 fungal disease of birds. It was concluded that this disease was in no 

 way related to construction activities (NAI, 1974a) . 



After New Haven Harbor Station construction was completed, 

 further dredging-related studies were conducted to assess the impacts of 

 construction of transmission lines from New Haven Harbor Station to 

 English Station. Assessed impacts included dredging, benthic habitat 

 removal, and land disposal in East Shore Park (NAI, 1975a, 1975b) . 



Five studies were also conducted after operations commenced in 

 1975 with objectives of describing and evaluating actual or potential 

 plant impacts. A study of current velocities around the intake struc- 

 ture (with various combinations of the three cooling water pumps in 

 operation) was conducted in order to evaluate whether operation met 

 design specifications (NAI, 1973). A three-dimensional thermal survey 

 and aerial infrared imagery described the thermal characteristics of the 

 harbor during New Haven Harbor Station operations and delineated the 

 discharge plume in a limited fashion (NAI, 1976a) . Later, NAI (1977a) 

 completed a series of thermal and dye studies to more precisely describe 

 the plume. An assessment of the thermal toxicity of the discharge to 

 representative New Haven species was presented in a literature review 

 (NAI, 1976b) . When biofouling of the condenser tubes became an oper- 

 ational problem in 1976, NAI (1976c) studied the identity and composi- 

 tion of the fouling bacteria and assessed the viability of treatment 

 with biocides to solve the problem. 



