Table 25
Wilmington Harbor Jetties
Wilmington, Delaware
Philadelphia District
Date(
Construction and Rehabilitation History
18
83
A
curved stone-filled pile and timber crib jetty was
constructed north of the Christina River mouth.
1884
The north jetty was raised 4.0 ft to a height above high water (no
information on exact height).
1goo
The north jetty was repaired and extended 313 ft. A terminal crib
was also constructed. The total length of the north jetty was
2,150 ft. Jetties were constructed on the south side of the
Christina River and at the mouth of the Brandywine River. The length
of the south Christina River jetty was 1,515 ft and was built of pile
and stone. A cross dike was built to connect the inner end of the
jetty to the shore at high water. The Brandywine River jetty was
V-shaped and was built of stone-filled pile and timber crib. The
total length of this jetty was 690 ft, 430 ft on the Brandywine River
side and 260 ft on the Christina River side (Figure 31).
Repairs were made to the Brandywine River jetty and the north
1905
Christina River jetty. New wales were put on the Brandywine jetty,
and face timber was replaced on the north Christina jetty. Stone was
replaced where needed on both jetties.
1916
Repairs were made to the north Christina River jetty. Broken timber
and piling was replaced with new material. Fender piles were placed
along the channel face, and the interior of the crib was filled with
stone where settling had occurred along the entire length o ' the
f
jetty.
The south jetty was removed, and a new jetty was to be built south of
1925
the Christina River.
Approximately 1,200 ft of the north jetty was removed to improve the
1931
channel regime. The total length of the north jetty was 950 ft (Fig-
A new jetty was completed south of the Christina River mouth. The
1936
of
steel sheet-pile wall, buttressed with 100-ft timber piles 1
on
2
outboard section consisting of twelve 25.5-ft-
center, a
diameter steel sheet-pile cells, and one 30.5-ft-diameter terminal
cell with twelve 51-ft interconnecting fences. Crest elevation was
Engineers Datum (2.9 ft below mean sea level, 1929).
ft
The landward end of the jetty was connected to shore by a 120-ft
steel sheet-pile anchor wall. The cost of construction was 5,000.
(Continued)
53
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