Table 39
Rock Hall Harbor Breakwaters
Rock Hall, Maryland
Baltimore District
Date(
Construction and Rehabilitation History
1939
Two breakwaters were constructed with
tons of stone. Lengths
of the breakwaters were 850 ft and 700 ft east and west, respectively
Elevations of the breakwaters were
ft mlw, with a
single capstone, crown width of 4.0 ft, and side slopes of
1964
Repairs were made on both breakwaters to restore them to original
design geometry. The east breakwater was in good condition with
crest subsidence of less than 0.5 ft. The majority of the repairs
were made on the west breakwater. The landward 8 ft had subsided up
0
to 2.0 ft, the seaward 50 ft had subsided to mlw, and the adjacent
380 ft had subsided 1 0 to 2.5 ft. The landward ends of both break-
.
waters were repaired with 250- to 500-lb stone. A 40-ft extension
was added to the west breakwater (Figure
and the outer 220 ft,
including the extension, were repaired with 1,000 to 2,000-lb cover
and core stone. The adjacent 260
were raised by filling the
existing section with additional core stone.
Extensive rehabilitation was done to both breakwaters due to wave
1982
transmission and overtopping causing excessive wave heights (greater
than 4.0 ft) in the inner harbor. Estimated cost of the rehabi-
litation was
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,800,000 nd required over 27,000 tons of stone.
a
ft mlw, crown width was widened
Crown elevation was raised to
to 8 0 ft with three capstones, and side slopes remained
.
requiring 12,400 tons of stone. The west breakwater was extended
to 1,100 ft requiring 14,800 tons of stone. Cover stone used for
lb at the trunk to 2,800
at the
rehabilitation ranged from
head. Cross sections and location of the rehabilitation are shown
in Figure 52.
No further repair or maintenance information has been found.
1986
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