Date
Construction and Rehabilitation History
of the south jetty. A
on the north jetty and seaward 15,000
1898
portion of the south jetty core from sta
to sta
con-
.
(cont ) sisted of clay materials, but this type of construction was abandoned
due to increasingly difficult methods of placement as the jetty
advanced into deeper water. The general method of construction in-
volved extending an apron of large (outside edges) and small sand-
stone riprap followed by a core of small sandstone riprap up to mlt,
placing the granite blocks on the core side slopes, and then placing
the remaining core stone and completing the cover layer. Most of the
jetty construction was in water depths of less than -12 ft mlt, with
the other few thousand feet of each jetty in deeper water. The
jetties' seaward ends terminated at about the -27 ft mlt contour.
The north and south jetty were completed using approximately
1,117,000 and 807,000 tons of stone at total costs (adjusted to
.
price index) of ,484,000 and ,567,000, respectively
Following the hurricane of September 1900, repairs were made to the
jetties. During 1907-1909 the south jetty was extended from
1909
to sta
sta
Nearly all of the south jetty repairs were
located at its landward end between
and
and its seaward
end between
and sta
Granite blocks weighing to
7 tons were placed on the landward section and large (8- to 10-ton)
and small (less than 8-ton) granite riprap were used on the seaward
ft mlt with a
section. The south jetty extension was built up to
maximum top width of 20
and
side slopes. The core stone
consisted of pieces less than tons in weight placed on a
apron of 20- to 120-lb stone. The cover layer stone placed below and
above -15 ft mlt averaged 6 (minimum of 3) and 10 tons, respectively.
The south jetty repairs and extension required 128,400 and
77,700 tons of stone placed at total costs of 7,000 (estimate) and
4,000, respectively. In 1908, a concrete cap was placed on the
and
using 1,680 cu yd of
south jetty between sta
concrete and 2,409 tons of chinking stone at a cost of ,600. The
majority of the north jetty repairs were completed during 1903-1905
with 105,000 tons of 10- to 12-ton stone placed between sta
and
sta
During 1907-1909 minor north jetty repairs were made
and sta
using 11,600 tons of stone. Total
between sta
cost of the north jetty repairs was 0,000.
Minor repairs were made to the south jetty following the storm of
which damaged sections at its landward (sta
July
to
1915
A total of
sta
and seaward
to sta
ends.
22,500 tons of stone was placed, and several thousand tons of
displaced cover stone were reset. Total repair cost was 1,000.
A hurricane during August caused some damage to the jetties, but no
1915
subsequent work was undertaken. The north jetty received the most
(Continued)
19
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