Table 6 



Cape Lookout Harbor of Refuge Breakwater 



Cape Lookout, North Carolina, SAW 



Date(s) Construction and Rehabilitation History 



1914- The landward 4,800 ft of a 7 ,500-f t-long rubble-mound breakwater 

 1917 (Figure 9), authorized by Congress in 1912, was completed in 1917. 

 Subsequently it was determined that the remaining 2,250 ft of the 

 structure was not needed. The breakwater was constructed on a 

 2-ft-thick stone mattress. Specifications for the breakwater called 

 for quarry-run stone graded so that at least 10 percent was greater 

 than 10 tons, at least 40 percent greater than 7 tons, and at least 

 70 percent greater than 2 tons. The design section had a 20-ft 

 crest width at +6.5 ft mlw with IV: IH side slopes. About 

 651,400 tons of stone were placed at a total cost of $1,363,800. 

 (The cost included some other items such as constructing sand 

 fences, a survey boat, and paying for rights-of-way.) 



1921 In December cross sections were taken of the breakwater. They 



showed that the average top elevation of the breakwater was at mlw. 

 The side slopes near the top were fairly flat (about 1V:2H to 

 IV: 3H), and the lower part of the side slopes was fairly steep, gen- 

 erally IV: IH. At that time the breakwater was visible only in 

 places at extreme low water. 



1985 Since its completion no maintenance or repairs have been made. Be- 

 cause of a sand spit in the lee of the structure, which results in a 

 natural harbor, no plans exist to restore the breakwater to its 

 original condition. (The breakwater was deauthorized on 1 November 

 1981.) 



18 



