Table 6 

 Hoonah Harbor 

 Hoonah , Alaska 



Date(s) Construction and Rehabilitation History 



1972 The project was adopted. 



1979- The project was constructed, including a 15.5-acre boat basin, three 

 1980 rubble-mound breakwaters, and two rubble-mound diversion dikes. The 

 main breakwaters were 800 ft and 1,507 ft long, and an entrance 

 breakwater was 140 ft long. The breakwaters were constructed to a 

 crest elevation of +24 ft mllw, crest width of 4.5 ft, and side 

 slopes of 1:1.5. The 4-ft- thick layer of armor rock, 470 to 780 lb, 

 covered a core of quarry spalls. The armor rock extended from the 

 crest to -12 ft mllw on the seaward side and for 150 ft back from the 

 head on the basin side, and to +15 ft mllw over the rest of the 

 breakwater on the basin side. The diversion dikes were constructed 

 of dredged material covered with a 1-ft filter layer and a 3-ft layer 

 of rock spalls. The main purpose of the diversion dikes was to pre- 

 vent ice from entering the basin. Crest elevations were +24 ft mllw 

 for the south dike and +21 ft mllw for the east dike. A gap was left 

 between the dikes for circulation in the basin and protection of 

 salmon fry. Design was based on a 10 percent wave of 4.6 ft, non- 

 breaking. The harbor is illustrated in Figure 16; cross sections of 

 the breakwaters are given in Figure 17. 



1985 An aerial photograph of the harbor is presented in Figure 18. There 

 are no reports of needed repairs or rehabilitation. 



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