Table 47
Upper Thorofare Breakwaters
Deal Island, Maryland
Baltimore District
Date( s)
Construction and Rehabilitation History
Two stone breakwaters were constructed with 3,650 tons of stone at an
1934
estimated cost of ,000. The north breakwater was 410 ft long. The
south breakwater was 310
long. The seaward ends were 180 ft apart
(Figure 60). Crest elevations were
ft mlw, except the landward
of the south breakwater which was from
to
mlw.
142
Crown width was 4.0 ft, and side slopes were
1966
Sand had accumulated around one-half to two-thirds of the landward
end of the north breakwater. The south breakwater had an average
subsidence of 2.0 ft and was repaired to raise the elevation to
ft mlw. Crown width was 4.0 ft, and side slopes were
1981
A survey indicated the south breakwater was in excellent condition,
although the midsection appeared to have subsided 1.0 ft. The north
breakwater was almost completely surrounded by sand, and future
shoaling of the channel was foreseen. The north breakwater appeared
to have subsided 1.0 ft from the original design elevation.
No further repair or maintenance information has been found.
1986
95
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