Struc-
ture
Structure Date
Construction
Length
of
Type
men t
No.
Table
Locat ion
Materials
ft
Origin
Lake Superior (Continued)
Keweenaw Waterway,
8,844
1860
N
Mich.
Lac La Belle
1,179
1959
N
Harbor, Mich.
Grand Traverse Bay
1,618
1949
M
cc
Harbor, Mich.
,258
.
Big Bay Harbor,
1960
Mich
Presque Isle
2,816
1897
Harbor, Mich.
Marquette Harbor,
4,510
1867
R
Mich.
Grand Marais
1883
4,409
Harbor, Mich.
CSSP
Little Lake Harbor,
N
1964
Mich.
Whitefish Point
1968
1,364
cc
Harbor, Mich.
Lake Michigan
Manistique Harbor,
B(2)
1887
0
Mich.
1,100
Cedar River Harbor,
1883
M
Mich.
Memominee Harbor,
.
R
1871
3,912
Mich
Oconto Harbor, Wis.
R
1883
2,144
Sturgeon Bay Canal,
N
1873
2,688
wis.
(Continued)
(Sheet 2 of 8)
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