Details of the Duck site as it pertains to these items are discussed further 

 in this guide. 



Duck, North Carolina, was established in about 1909, as a small fishing 

 village with eel and carp the predominant fishery resources. When CERC 

 selected the Duck site in 1972 there were relatively few homes in the area; 

 however, this situation has changed considerably. Duck has become a popular 

 summer resort, and fast-growing resort communities are located both north and 

 south of the area. The site had also been used previously by the Navy as a 

 practice bombing range. Although there is evidence of the practice rounds of 

 ammunition used during that time, there are no high explosives in the area. 



Construction of the FRF pier began in August 1975. The pier was con- 

 structed in two phases, using a temporary second pier with closely spaced 

 bents (pile groups 4.9 meters (16 feet) apart with four piles per bent) 

 located along the south side of the FRF (Fig. 5). During the first phase of 

 construction, 183 meters (600 feet) of pier was completed and the construction 

 pier was removed. The second phase began in Marcti 1976 with the reconstruc- 

 tion of the second pier. The entire FRF pier was completed by August 1976, 

 and the second pier was removed in January 1977. 



Figure 5. The FRF during construction, with second pier 

 in foreground. 



3. FRF Specif ications. 



A cross section of the pier is shown in Figure 6. The 561. 1-meter-long 

 (1,840.9 feet) pier is a reinforced concrete structure supported on concrete- 

 filled steel pilings spaced 12.2 meters (40 feet) on center along the pier 

 length and 4.6 meters (15 feet) on center across the width (Fig. 5). Inshore 

 bents (.numbered 6 to 20) are supported on 76-centimeter-diameter (30 inches) 

 piles; the outer piles (bents 21 to 52) are 91 centimeters (36 inches) in 

 diameter. The piles are embedded about 15 to 18 meters (50 to 60 feet) into 

 the ocean bottom. Concrete erosion collars 120 and 137 centimeters (48 and 54 

 inches) in diameter, protect the pilings from sand abrasion, and a cathodic 

 system provides protection from corrosion. The pier deck is 6.1 meters (20 



18 



