Table 16 

 Seldovia Harbor 

 Seldovia, Alaska 



Date(s) Construction and Rehabilitation History 



1945 The original project authorized removal of obstructions in the 

 entrance channel . 



1958 The basin was authorized, including dredging a 700- by 300-ft basin 

 to -12 ft mllw and constructing a 400- and a 600-ft breakwater. 



I96I- The project was completed. The 400-ft north breakwater had a crest 

 1962 elevation of +28 ft mllw, crest width of 6 ft, side slopes of 1:1.5, 

 and was constructed of a gravel core covered with a minimum 2-ft- 

 thick layer of quarry spalls. It was covered with a 5-ft-thick layer 

 of armor rock on the crest and bay sides and a 4-ft-thick layer of 

 Class "B" rock on the bay side. The 600-ft detached south breakwater 

 had a crest elevation of +25 ft mllw, crest width of 6 ft, side 

 slopes of 1:1.5, and was constructed of a gravel core covered with a 

 minimum 2-ft-thick layer of quarry spalls and a 4-ft-thick layer of 

 Class "B" rock, 



1964 The basin subsided 3.8 ft in an earthquake. The breakwaters were 

 repaired with a 7. 5-ft-thick layer of rock on the basin side and a 

 4-ft-thick layer of armor rock on the crest, raising the crest eleva- 

 tions 0.2 ft over the original design heights, and widening the 

 crests to 8 ft. The repair work required a total of 26,877 tons of 

 stone. Cross sections of the rebuilt breakwaters are shown in 

 Figure 42. 



1985 The harbor is illustrated in Figure 42, and an aerial photograph of 

 the harbor is presented in Figure 43. There have been no reports of 

 needed repairs or rehabilitation since 1964. 



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