Table 25
Provincetown Harbor Breakwater
Provincetown, Mass.
Construction and Rehabilitation History
A 2,500-ft-long rubble-mound breakwater was constructed, providing
1970-
1972
Provincetown Harbor protection from storm waves (Figure 28, plan
view). The breakwater was placed shore parallel, except for a
ft-long shoreward hook at its northern end, and located approximately
offshore in water depths of - 1 1 to -20
mlw. The design
2,000
mlw crown elevation, a 10-ft crown
geometry consisted of a
side slopes. The breakwater heads differed only
width, and
in having 12-ft crown widths (via 100-ft width transition sections).
The 0- to 50-lb bedding stone was placed in a 3- to
layer
and extended 5 to 8 ft beyond the cross-section toe. The core stone
and slope stone below -8 ft mlw were 1 0 to 4,000 lb in size. A
0
double layer of 5- to 8-ton cover stone was placed above -8
mlw.
The contract cost for placing an estimated 328,000 tons of stone was
7.3-sec fetch-limited
,534,000. The design was based on an
mlw. Stone size was
wave height and a maximum tide level of
selected using Hudson's slope stability formula.
The breakwater was found to be in excellent condition during a visual
inspection.
Recent yearly visual inspections indicated that the breakwater was in
1984
good condition.
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