Table 19
Rockport Harbor Breakwaters
Rockport, Mass.
Construction and Rehabilitation History
Two breakwaters of rubble stone were built, one 900 ft easterly from
Bearskin Neck and the other about 200 ft northerly from Norwoods
1839
Head, leaving an entrance channel 220 ft wide between their low-water
lines (Figures 21 and 22). Construction costs totaled ,200.
1
By
the breakwaters had deteriorated to the point that they no
longer afforded the necessary harbor protection. From 1903 to 1905
1905
repairs were made by placing heavy rubble stone to a height of
ft mlw, a top width of 20 ft, and slopes of
and
on
the sea and harbor sides, respectively. A total of 11,050 tons of
stone was used, and principal rocks were removed from the harbor for
a total cost of ,000.
Inspections indicate the breakwaters were in good condition. Repairs
may have occurred in 1952 and 1956. (Information on repairs during
1967
the 1950's was not found in the annual reports to the Chief of
Engineers.)
Repairs were made at the seaward end of Bearskin Neck breakwater
1970
where stone had been displaced from a lower portion of the head side
slope.
The existing head section cover layer had a fairly smooth appearance
due to careful placement and addition of concrete grout. Also, iron
tie rods had been placed, connecting individual cover stone through-
out this section. The remainder of the breakwater is composed of
500-lb to
stone with an outward appearance typical of
repair section was located mostly
mound structures. The
on the harbor side quadrant of the head. Stone weighing 5 to 8 tons
side slope. The repairs were made for a lump
was placed at a
sum of ,500.
The seaward end of Bearskin Neck breakwater was repaired with 5- to
1973
8-ton stone. The stone was placed on two sections, one totaling
ft in length on the seaside head and trunk and the other totaling
50 ft in length, the same area repaired in 1970. The repairs con-
sisted of adding stone to void areas such that the resulting side
slopes were fairly uniform. Lump sum cost of the repair was ,700.
Repairs were made to the seaward 100 ft of Bearskin Neck breakwater.
Existing displaced stone was reset throughout this section and, to
1978
I
complete the repairs, approximately 1,600 tons of new
to 8-ton
ft mlw crown eleva-
stone were used. The repair geometry had a
tion, a crown width varying from 1 to 28 ft (widest at seaward end),
8
(steepest at
to
and side slopes varying from
(Continued)
44
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