CASE HISTORIES OF CORPS BREAKWATER AND JETTY STRUCTURES
SOUTHWESTERN
PART I:
INTRODUCTION
Background
1.
The US Army Corps of Engineers Corps is
for a wide
variety of coastal structures located on the Atlantic, Pacific, and gulf
coasts, the Great Lakes, the Hawaiian Islands, other islands, and inland
waterways. Coastal improvements such as breakwaters or jetties are neces-
sary to provide harbor protection and safe passage of vessels. These struc-
tures are subjected continuously to wave and current forces and usually are
constructed on top of movable-bed materials. Under these conditions struc-
tural deterioration can occur and, at some point, maintenance, repair, or
rehabilitation is required if the structure deteriorates and/or fails to serve
the existing needs of the project. Some of these projects have been main-
tained for 150 years or more. Methods of construction and repair have varied
significantly during this time, due principally to a better understanding of
coastal processes, availability of construction materials, existing wave
climates, regional construction practices, and economic considerations.
2.
The purposes of this report are to provide insight into the scope,
diction; to determine their maintenance and repair history; to determine
their methods of construction; and to make this information available to
Corps personnel. To accomplish these objectives, case histories of Corps
breakwater and jetty structures have been developed to quantify past and
present problem areas (if any), take steps to rectify these problems, and
to subsequently evaluate the remedial measures. General design guidance
can be obtained from the solutions that have been most successful. Infor-
mation in this report should be of particular value to Corps personnel in the
US Army Engineer Division, Southwestern (SWD), and its coastal districts and
possibly to non-Corps personnel. Further research is being conducted to
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