Table 7 1
Port Austin Harbor Breakwater
Port Austin, Michigan
Date
Construction and Rehabilitation History
Construction of a 1,926-ft-long offshore breakwater (Figure 1 0 was
9)
1959
completed. The breakwater was built with cellular steel sheetpiling
which ranged from 15.3 (Type D) to 3 0 . 4 ft (Type A) in diameter (Fig-
ure 190). The cells were filled with sand and gravel and crowned
with a bituminous cap. The crest el of the breakwater was
ft
ft lwd for Types C and D. Riprap was placed
for Types A and B and
along the sides of the cellular breakwater except on the harbor side
of Types C and D.
The lakeward cells (Types A and B were replenished with stone and
)
1979
capped with concrete.
1983
The shoreward
(Types C and
revealed hairline cracks in the
asphalt which were sealed. Caulking of construction joints in the
breakwater also was performed.
A safety railing was installed on the structure. The breakwater is
1986
considered to be in good condition; however, some construction joints
are separating and require repairs. An aerial view of the Port
Austin breakwater is shown in Figure 191.
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