Table 16
Big Bay Harbor Breakwaters
Big Bay, Michigan
Construction and Rehabilitation History
Date
1960
Construction of a 471-ft-long east breakwater and a 787-ft-long west
breakwater was completed at the site (Figure 42). The shoreward
269-ft-long portion of the east breakwater was rubble-mound (Fig-
)
It had an 8-ft crest width and a
crest el. Slopes on the lakeside were
and on the harbor
side they were
The structure was built around steel sheet-
ft lwd. From this point lakeward a
piling which had an el of
steel sheet-pile structure extended an additional 170 ft (Figures 42
and 43, Section B. The shoreward 547 ft of the west breakwater uti-
)
lized the same structure. The sheetpiling had a crest el of
ft
lwd with stone toe protection on each side. The head of the east
breakwater consisted of a cellular sheet pile (32 ft in diameter),
I)
and the lakeward 240 ft of the west breakwater was constructed of
36-ft-diameter cellular sheetpile (Figures 42 and 43, Section C.
)
These cells were filled with sand and capped with 2 ft of grout-
filled rock. Rubble toe protection was included also.
The east breakwater was rehabilitated.
1969
An inspection of the harbor structures indicated that additional rip-
1979
rap was needed on both sides of the west breakwater (Figure 43,
tion B. The stone was eventually placed.
)
1986
The breakwaters presently are in good condition. An aerial view of
Big Bay Harbor breakwaters is shown in Figure 44.
75