Table 19
Grand Marais Harbor Piers
Grand Marais, Michigan
Construction and Rehabilitation History
1883-
Construction of 700-ft-long portions of the east and west piers pro-
1885
gressed during this time (Figures 51 and 52, Section B ) . It was a
timber crib structure with a 20.5-ft width and was built on a stone
blanket. Stone protection also was included in construction.
1885-
A 1,112-ft-long portion of the west pier ( timber crib structure)
a
1903
was constructed during this period (Figures 51 and 52, Section A ) .
It was 24.5 ft wide. The structure was built on a stone mattress,
and riprap was placed along the sides for toe protection.
1892
The inner 250-ft-long portion of the east pier and 100-ft-long por-
tion of the west pier were completed (Figures 51 and 52, Section C ) .
These were wood-pile structures filled with sand and stone. They
were 12.5
wide with crest els of
ft lwd. Stone was placed on
the channel side of the structures.
The outer 745-ft-long portion of the east pier (Figures 5 1 and 52,
1893-
Section E) was constructed during this period. This was a 24-ft-wide
1903
stone-filled timber crib structure. It was built on stone, and rip-
rap was placed on each side of the structure.
was
A 5,770-ft-long timber-pile dike (Figures 51 and 52, Section
1895-
constructed during this time. It was installed at an el of
ft
.
1898
Stone reinforcement was added along the timber-pile dike built during
1905-
1895-98. The stone crest was 1 ft wide at an el of
0
ft lwd.
1907
Timber crib structures on the west pier (Figures 51 and 52, Sec-
1914
tion A) were repaired. Crib walls were repaired with tie rods, and
425 tons of crib-fill stone was installed in the outer 500-ft portion
of the pier.
Repairs were made to the east and west piers (Figures 51 and 52, Sec-
1936-
tion B. These included replacing decaying, broken, or missing deck
)
1942
planking and replenishing crib-fill stone.
A concrete cap (superstructure) was installed on the east pier (Fig-
1950-
ures 51 and 52, Section E.
)
The cap extended to an el of
ft lwd.
1951
Construction of an 802-ft-long cellular sheet-pile breakwater exten-
1960
sion was completed at the lakeward end of the west pier (Figures 51
and 5 )
2 . The lakeward 307 ft of the structure was constructed with
58.9-ft diameter cells, and the remaining portion was built with
(Continued)
87
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