Table 8
Juneau Harbor
Juneau, Alaska
Construction and Rehabilitation History
Harris Basin
The project was adopted.
1937
The breakwaters were constructed. The 430-ft south breakwater was
constructed as a rock mound to elevation +24 ft mllw, crest width of
1939
8 ft, and
side slopes. The 1,540-ft north breakwater was con-
structed to an elevation of +26 ft mllw, a crest width of 8 ft, and
side slopes of
The north breakwater was constructed of rubble
mound covered with a 2-ft-thick layer of Class "A" armor rock on the
crest and on the channel side to elevation -10
mllw. The break-
waters required
cu yd of rock. Breakwater cross sections are
given in Figure 21.
An 11.5-acre basin was dredged to -12 ft mllw.
1939
1973
The north breakwater was repaired by reshaping and placing armor
stone.
1985
The harbor is illustrated in Figure 21, and an aerial photograph of
needed repairs or rehabilitation since 1973.
Aurora Basin
1958
The project was adopted, including a 19-acre basin protected by a
530-ft jetty and a 1,150-ft breakwater. During the design stage, the
jetty and breakwater were lengthened to 670 ft and 1,500 ft, respec-
tively. The breakwater was originally designed as a rubble mound,
but the design was changed to a composite rubble-mound plank and
piling breakwater due to unstable soil conditions.
1962
The jetty was constructed of rubble mound to elevation +24
mllw,
with a crest width of ft, and side slopes of
The jetty
required 24,000 tons of rock. Jetty cross sections are shown in
The 19-acre basin was dredged, 13.1 acres to -12 ft mllw and
5.9 acres to -14 ft mllw.
1963
The main breakwater was constructed of a rubble mound to elevation
1964
ft mllw and steel pilings with treated planks to elevation +24 ft
mllw. The rubble mound included a dredged material blanket 90
wide and 1,500 ft long, a core of dredged material to elevation
(Continued)
64
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