Construction and Rehabilitation History
The north or Haupt jetty was repaired and extended 3,490 ft landward
1908-
which closed the gap, and a 7,385-ft-long south jetty was constructed
1917
The jetties were roughly parallel, spaced 1,500 ft
seaward of the north
apart, with the south jetty extending 1,150
jetty. The jetties were built up to
mlt and crest widths of 10
using small riprap (15 to 200 lb), large riprap weighing
to 20
ton, and crest stone greater than 7 tons comprised per-
200
cent of total. The total quantity of stone placed on the north and
south jetties was 162,400 and 253,900 tons, respectively. These
totals include minor repairs made during 1916-1917. The total cost
for jetty improvements during this period was
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,544,500. In 1911,
portions of the Mansfield and Nelson jetties were removed from the
channel at a cost of ,300. The authorized 20-ft channel depths
were obtained during construction as the tidal flow and resulting
bottom scour were gradually confined.
Four rubble-mound spurs were added on the north jetty channel side to
1922-
reduce the amount of scour and undermining caused by the proximity of
1923
the channel. The spurs were built up to
spaced 600 ft
apart, and extended 50 to 100
normal to the jetty axis. The
outermost spur was about 1,000 ft from the seaward end of the
jetty. A total of 25,070 tons of riprap stone was placed at a cost
of 7,800. Minor repairs were made to the north jetty in 1923,
consisting of 280 tons of stone for a cost of
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,300.
of north jetty and its spurs were repaired. A
The outer 3,100
1927-
total of 18,070 tons of stone was placed at a cost of 2,900.
1928
The jetties were repaired using 20,860 tons of stone at a total
1934-
cost of 9,400.
1935
Concrete caps were placed on 4,670- and 3,150-ft sections of the 1936
1935-
north and south jetties, respectively. The north jetty cap started
1,790 ft from its landward end, was 5 ft wide on the inner 1,800 ft,
and 12 ft wide on the remainder. The south jetty cap started at its
landward end, and the inner 1,000 ft was 5
wide with the remainder
being 12 ft wide. The top elevation of the caps was between
and
ft mlt. A total of 5,030 and 4,160 cu yd of concrete was used on
the north and south jetties, respectively. Total construction cost
was 5,400.
The south jetty cap was extended 2,780 ft seaward using 6,630 cu yd
of concrete for a total cost of 9,700. The cap was 12 ft wide
1943
with a top elevation of
to
ft mlt.
Repairs were made on sections of both jetties using core and cover
1942-
stone. A total of 23,950 tons of stone was placed at a total cost of
1943
3,000.
(Continued)
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