Table 5
Atlantic Harbor of Refuge Breakwater
Atlantic, North Carolina, SAW
Date
Construction and Rehabilitation History
A 2,000-ft-long sand breakwater (Figure 8 with a riprap head was
)
1972
constructed in February 1972 as part of the Harbor of Refuge
ect. Material dredged from the access channel was used for the
breakwater. A tentative design section called for a crest width of
ft mlw, with side slopes of
above
15 ft at an elevation of
below. The head of the breakwater would have a
mlw and
3-ft-thick riprap section from -1 to
ft mlw. This design sec-
tion was similar to the one used on the Stumpy Point Bay break-
waters. Estimated quantities were 4 6 , 5 0 0 cu yd of sand, 3 , 2 3 2 tons
of stone, and 6.5 acres of grass (to hold the sand in place).
The
estimated total cost was ,400.
Erosion had occurred along a 400-ft section of the southeastern face
1973
of the breakwater. The erosion extended from 35 to 6 0 ft into the
embankment, creating an escarpment of about 3 ft, and the planted
grass had been destroyed in this area. Also, the stone protection
on the south end of the breakwater (previously covered with sand)
had become uncovered, displaced, and scattered. The sand fill be-
hind the stone apparently eroded away first, undermining the rock
and subsequently displacing it.
No maintenance work has been carried out since construction.
1985
16
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