Table 3 (Continued)
Construction and Rehabilitation History
1883-
Inner jetties were constructed of horizontally placed willows
1887
(individual pieces were several inches in diameter) placed between
vertical piles and maintained to an elevation
above flood tide
level. More willows were added periodically as existing ones sub-
sided. The inner east jetty was constructed about 200 ft inside the
east jetty in two sections; a 1,940-ft section beginning near the
landward terminus of the east jetty, and a 7 , 1 0 5 - f t section extending
to the seaward end of the east jetty. The 4,900-ft-long inner west
inside the west jetty (making the
jetty was constructed about 150
inner jetties 650
apart) terminating at its seaward end. Wing
dams of similar design were built between the inner jetties and re-
spective outer jetties creating rectangular compartments for trapping
and accumulating sediments. During October 1886 a hurricane further
damaged (removed) about 700
of the parapet wall near the seaward
end of the east jetty. By 1887, accumulating sediments and settle-
ments had buried the west jetty and landward 4,800 ft of the east
jetty (although erosion of the deposited sediments east of the
jetties was occurring).
1889-
In 1889, the east jetty concrete cap was repaired along those sec-
tions damaged during storms of 1882 and 1886. Approximately 3,710 ft
1901
of cap and 810 ft of parapet wall were rebuilt, and 320 ft of new
parapet wall was constructed. Additional mats (as needed) and a
ft-thick layer of riprap stone were placed up to flood tide level
prior to pouring new cap sections. Cap sections varied from to
ft in width and to 3-1/2 ft in height. During 1889-1893, con-
tinuous cribwork was placed beginning at the landward end of the con-
crete cap. It was extended landward several times, reaching a total
length of 2,245 ft. This cribwork was at least partially required
due to continuing erosion on the seaside of the jetty (at a rate of
along the jetty). On several occasions, cribwork also was
200
placed on the seaward ends (several hundred feet of each) of the
inner jetties, providing wave and current protection along these ex-
posed sections. The inner east jetty was extended landward several
times (giving it a total length of 9,730 ft), employing the same con-
struction method used during 1883-1887. Extensions were required due
to continued landward recession east of the jetty and the need to
limit sediment motions. In 1895, a storm destroyed
100 ft
of the inner west jetty. No subsequent repairs were made, leaving
the effective length 4,800 ft. Additional wing dams were built and
maintained together with those already built. In 1901, the con-
tractors were reimbursed in the amount of ,000,000for maintaining
the authorized channel dimensions for a cumulative period of 20 years
(noncontinuous), which was the time period agreed upon in 1875.
1902-
The inner jetties and connecting wing dams now maintained by the
Corps were repaired and brought up to grade as needed. The outer
1920
(Continued)
20
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