Table 1 (Continued)
Date(
Construction and Rehabilitation History
1963
Additional stone was placed along the channel side of the north jetty
from
to
The 1,000-lb to 4-ton stone was placed to
an elevation of
mlg, a top width extending 15 ft from the jetty
side slope. A total of 47,170 tons of
center line, and a
stone was placed at a cost of 1,900.
1966
The south jetty was extended seaward from
to
The
jetty construction was similar to the Phase I jetty construction
during 1960-1961, with shell and riprap placed between retaining
dikes composed of dredged fill. The dikes were placed 30
on
either side of the jetty center line and built to an elevation of
-1.5 ft mlg. The shell material was placed to - 1 ft mlg and
side slopes, followed by the 100- to 500-lb riprap placed to
ft
mlg, a width of 20 ft, and
side slopes. Total cost was
6,500 using 80,000 cu yd of shell and 106,200 tons of riprap.
1968
The south jetty was extended seaward from
to
using
the 1966 extension, Total cost was 2,200 using 113,500 cu yd of
shell and 114,000 tons of riprap.
The south jetty was capped with armor stone from
to
1971
(second phase construction) and extended seaward from
to
(first phase construction). The extended section was similar
to the earlier south jetty extensions using a core
to
of shell and a cover layer of 100- to 500-lb riprap. Cost
of the extension was 4,400 using 4,400 cu yd of shell and
51,000 tons of riprap. The capped section of the jetty consisted of
3- to 6-ton stone constructed to a crown elevation of
ft mlg, a
side slopes. Additional stone,
12-ft crown width, and
weighing 500 lb to 2 tons, was placed on the channel side of the
jetty, adjacent to the capping stone. The stone was placed starting
ft from the jetty center line to a design elevation of
ft mlg
side slope. Prior to the capping, center line elevations
and
varied from - 1 to
(March 1970 survey). Total cost of the
ft
improvements was
||content||
,006,700 using 175,310 tons of stone.
Capping stone and channel side slope stone were placed on the south
1974-
(seaward end). This work was identical
jetty from
to
1975
to the 1971 improvements, except that 2- to
stone was used to
cap the jetty. Existing center-line elevations varied from - 1 to
ft mlg (May
survey). The total cost was 8,900 using
37,300 tons of stone.
With the exception of the addition of channel side slope stone, the
1985
jetties have no repair history and are considered to be in good con-
dition. The jetties were constructed in water depths less than
(Continued)
13
Previous Page
