Table 1
7
Seward Harbor
Seward, Alaksa
Date(
Construction and Rehabilitation History
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.
The boat basin was dredged.
1932
1935
The north breakwater was authorized.
The north breakwater (950
1937
long) was constructed,
The north breakwater was raised to project height.
1953
Raising the south breakwater and constructing two pile breakwaters on
1954
the east side of the basin were authorized.
The south breakwater was raised, and two pile breakwaters were con-
1955-
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
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
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
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
and it was constructed of a rock
core covered with a 3.5-ft-thick layer of armor rock extending to the
ft mllw on the basin side. The
toe on the seaward side and to
sections are shown in Figure
breakwater
beach protection was added at the north end of the
Quarry
1972
basin.
1982
A Detailed Project Report and Final Environmental Impact Statement
recommended expansion of the harbor by construction of an additional
(Continued)
99
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