Table 12 

 Ninilchik Harbor 

 Ninilchik, Alaska 



Date(s) Construction and Rehabilitation History 



1958 The project was authorized, including a 320- by 150-ft small-boat 



basin dredged to +2 ft mllw, a 400- by 50-ft entrance channel dredged 

 to +9 ft mllw, and a 4lO-ft-long pile Jetty located 50 to 100 ft 

 south of the channel entrance. 



1961 The harbor was constructed. The pile jetty was deleted, the basin 

 revised to 400 by 120 ft, and rock sills were added upstream and 

 downstream of the basin. The downstream sill was built at a con- 

 trolling depth of +9 ft mllw. 



1962 The spring breakup flood damaged the upstream sill. 



1963 The upstream sill was repaired. 



1964 The basin subsided 2.5 ft in the earthquake. 



1966 The entrance channel was realigned 100 ft north of the design loca- 

 tion. A timber groin (200 ft long) was constructed 150 ft south of 

 the entrance channel. The groin was damaged in an October storm, and 

 the entrance channel moved 100 ft farther north. 



1967 Major rehabilitation of the harbor was done. The Ninilchik River was 

 diverted to its previous course south of the basin, and two short 

 rubble-mound jetties were constructed at the river mouth. Jetty 

 cross sections are shown in Figure 34. 



1980 A study was authorized to determine the feasibility of harbor 

 improvements. 



1984 The study determined that improvements to the harbor would not be 

 cost effective. 



1985 The harbor is illustrated in Figure 34, and an aerial photograph of 

 the harbor is presented in Figure 35. The harbor has required annual 

 maintenance dredging and repairs since its construction. 



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