1-11 



The Harbor Station burns #6 fuel oil. This oil's high visco- 

 sity would reduce seepage into the soil in the event of a spill. The 

 unloading pier is equipped with an oil boom, and a comprehensive oil 

 spill contingency plan has been prepared. 



Coolinq Water 



When operated at 100 percent load (gross rating) , 625 cubic 



3 

 feet per second (cfs) (17.7 m per second) of cooling water is pumped 



from the harbor through the plant to remove some 2100 x 10 BTU/hr (529 

 Kcal/hr) of waste heat from the condenser. In the process of removing 

 this waste heat the temperature of the cooling water is raised approx- 

 imately 15 F (8.3 C) . 



The cooling water for the unit's condenser is taken from and 

 discharged into New Haven Harbor. The locations of the intake channel, 

 intake structure, and discharge pipe are shown in Figure 1-3. The 

 intake channel extends from the shoreline to the eastern edge of the 

 harbor channel, a distance of about 900 ft. The cooling water is with- 

 drawn from the intake channel via a reinforced concrete intake structure 

 located at the existing riprap shoreline. The unidirectional flow of 

 water into the intake results in accumulation of fish and debris on 

 screens over the intake. The Federal Water Pollution Control Act 

 Amendments of 1972 requires under Provision 316b that "the location, 

 design, construction and capacity of cooling water intake structures 

 reflect the best available technology for minimizing adverse environ- 

 mental impact." To help prevent the entrapment and impingement of fish, 

 the structure was designed so that the approach velocity in the structure 

 prior to the traveling water screens is less than 1.0 ft per second 

 (fps) (30.5 cm per second). In addition, the structure includes a "fish 

 lip" or vertical wall 6 ft high in front of all openings to the coarse 

 bar racks. This fish lip was designed to minimize entrapment and 

 impingement of demersal fish. Details of the intake structure design 

 are presented in Figure 1-4. 



