Table 9
Murrells Inlet Jetties
Murrells Inlet, South Carolina, SAC
Construction and Rehabilitation History
Date
The two armor stone jetties (Figure 1 6 ) were constructed at a cost
1981
of .4 million. The north jetty (total length, 3,420 ft) consists
of the 560-ft-long shoreward jetty trunk; a 1,350-ft-long armor
the 1,650-ft-long
stone weir section (crest elevation
ft
seaward jetty trunk; and the 150-ft-long head section. The south
consists of a 3,170-ft-long trunk and
jetty (total length, 3,320
a 150-ft head section. The south jetty included an asphalt fishing
walkway. Sand dikes composed of dredged material, 400 and 2,815 ft
long on the north and south sides, respectively, tied the jetty
roots into the existing dune lines. The seaward parallel sections
of the jetties were 600 ft apart with a -12 ft mlw channel between
to
them. The design head section called for a double layer of
stone, a crest width of 18 ft, and a crest height of
ft mlw. The trunk sections were composed of one or two layers of
to 7-ton stone, a 15-ft crown width, and a
crown ele-
vation. Side slopes were
for both head and trunk sections.
The trunk and head sections were built upon a 2-ft-thick layer of
to 6-in. foundation stone followed by a 2-ft-thick layer of
to 2,000-lb stone. To provide toe protection, the double bed-
ding layer was extended 10 and 30 ft beyond the toe of the cover
stone on the trunk and head sections, respectively. The core stone
The weir section was made up
varied in size from 200 to 2,000
t o 9-ton cover stone (crest width of 12 ft) rest-
of one layer of
ing on a 2-ft-thick foundation blanket and buttressed on either side
by 2-ft-thick sections of
to
stone.
with
The design followed the SPM (1984) procedures, and the jetty con-
figuration was model tested at WES (Perry, Seabergh, and Lane
The design wave height was 12 ft.
The jetties have no history of damage or repair and appear to be
1985
functioning properly.
I
Previous Page
