Table 1 1
Breakwater and East and West Jetties
Auasi Small-Boat Harbor, Tutuila Island, American Samoa
Construction and Rehabilitation History
Date(
A
armor stone breakwater and 100- and 450-ft east and west
armor stone jetties, respectively, comprised a portion of the
91
was approximately
||content||
,166,300. The structures were designed for
depth-limited breaking wave heights of 4.8, 7.0, 5.6, and 6.0 ft
for the breakwater, west jetty head, west jetty trunk, and entire
east jetty, respectively. Water depths for these wave heights
were 6.2, 7.2, 7.2, and 7.7 ft, respectively. The structures have
no history of damage or repair. There is some evidence of armor
stone breakage. Although quarried basalt armor stone appeared to
be free of cracks when placed, internal stresses may be respon-
height onto
sible for breakage. Testing by dropping from a
a stone bed did not result in breakage during construction. The
condition is not widespread and is not considered serious at
present.
Figure 24. Auasi Small-Boat Harbor, Tutuila Island, American Samoa
42
Previous Page
