I
Table 11
Black River Harbor Breakwaters
Gogebic County, Michigan
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Construction and Rehabilitation History
The construction of an 825-ft-long east breakwater and a 555-ft-long
1957
west breakwater was completed at the site (Figure 25). The break-
waters were o f rubble-mound construction (Figure 26) with crest els
ft
and crest widths of 8 ft. Side slopes were
and
of
3-ton minimum armor stone was used.
An inspection made of the structures revealed that both breakwaters
1983
were in good condition with the exception o f several areas on each
structure that needed additional core and cover stone.
Since construction, the breakwaters have been repaired during routine
1986
maintenance operations. They presently are in good condition. An
aerial view of Black River Harbor breakwaters is shown in Figure 27.
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