CASE HISTORIES OF CORPS BREAKWATER AND JETTY STRUCTURES
SOUTH PACIFIC DIVISION
PART I:
INTRODUCTION
Background
The Corps of Engineers
1.
is responsible for a wide variety of
coastal structures located along the Atlantic and Pacific Oceans, the gulf
coast, the Great Lakes, the Hawaiian Islands, other islands, and inland water-
ways. Coastal improvements such as breakwaters and/or jetties are necessary
to provide harbor protection and the safe passage of vessels. These struc-
tures usually are constructed on movable-bed materials and are subjected
continuously to wave and current forces. Under these conditions, structural
deterioration may occur and, in time, maintenance may be required when the
structure fails to serve the needs of the project. Some projects have been
maintained for 150 years or more. Methods of construction (and repair) have
varied significantly during this time principally because of a better under-
standing of coastal processes and existing wave climates, availability
of construction materials, regional construction practices, and economic
considerations.
Purpose
2. The purposes of this report are to provide insight into the scope,
magnitude, and history of coastal breakwaters and jetties under CE juris-
diction; to determine maintenance and repair history; to determine methods of
construction; to make this information available to CE personnel; and to
address objectives of the Repair, Evaluation, Maintenance, and Rehabilitation
(REMR) research program. To accomplish these objectives, case histories of CE
breakwaters and jetty structures have been developed to quantify past and
present problem areas (if any), to 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. Information in
this report should be of particular value to CE personnel in the US Army
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