Table 17 

 Seward Harbor 

 Seward, Alaksa 



Date(s) Construction and Rehabilitation History 



1930 The original harbor was authorized, including a 4.7-acre basin 

 dredged to -12.5 ft mllw and construction of a 580-ft south 

 breakwater . 



1931 The south breakwater was constructed. 



1932 The boat basin was dredged. 



1935 The north breakwater was authorized. 



1937 The north breakwater (950 ft long) was constructed. 



1953 The north breakwater was raised to project height. 



1954 Raising the south breakwater and constructing two pile breakwaters on 

 the east side of the basin were authorized. 



1955- The south breakwater was raised, and two pile breakwaters were con- 

 1956 structed on the east side of the basin. 



1964 The harbor was destroyed by an earthquake. Reconstruction and expan- 

 sion of the harbor were authorized. 



1964- The harbor was relocated and reconstructed, including a 4.75-acre 



1965 replacement basin dredged to -12.5 ft mllw, a 12.45-acre extension 

 dredged to -15 ft mllw, and construction of a 1,060-ft south break- 

 water and a 1,750-ft east breakwater. The crest elevations of the 

 breakwaters varied but were approximately +18 ft mllw. The south 

 breakwater and the south portion of the east breakwater had crest 

 widths of 6 ft and 1:1.5 side slopes, and these were constructed of 

 core rock covered with a 4-ft layer of armor rock to the toe on the 

 seaward side and to +9 ft mllw on the basin side. The end 200 ft of 

 the east breakwater had armor rock extending to the toe on both 

 sides. The northern portion of the east breakwater had a crest width 

 of 5 ft and side slopes of 1:1.5, and it was constructed of a rock 

 core covered with a 3.5-ft-thick layer of armor rock extending to the 

 toe on the seaward side and to +9 ft mllw on the basin side. The 

 breakwater cross- sections are shown in Figure 44. 



1972 Quarry spall beach protection was added at the north end of the 

 basin. 



1982 A Detailed Project Report and Final Environmental Impact Statement 



recommended expansion of the harbor by construction of an additional 



(Continued) 

 99 



