Table 15
Morro Bay Breakwaters
Morro Bay Harbor, California
Construction and Rehabilitation History
1942
breakwater was constructed, and
1943
long south breakwater was completed at the site (Figure 21)
serve as a base for naval patrol craft. The structures were
rubble-mound and built at an el of +16 ft mllw with
side
slopes and a crest width of 1 ft.
6
Storm waves during this period damaged the north breakwater. The
1944
south breakwater received no appreciable
1945
The north breakwater was repaired and extended to 1,800 ft in
length. This work also included widening the crest from 1 to 20
6
ft. The project was adopted and completed under the supervision of
the CE using funds provided by the US Navy.
1946
The north breakwater again suffered damage from storm waves.
1948
Maintenance work was performed on the north breakwater. Damaged
sections of the structure were restored, and the cap was bound with
of -2 ft mllw on both sides.
concrete across the crest to an
The north breakwater continued to deteriorate, and shoaling occur-
1960
red in the channels. The south breakwater still had suffered no
observable damage since its construction in
1964
The north breakwater was reconstructed at a cost of
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,561,882.
The new rubble-mound structure was built at an el of +18 ft mllw,
with a 20-ft-wide crest and
side slopes. The structure was
rebuilt about 1 0 ft bayward of the original north breakwater loca-
0
tion and extended to 1,885 ft in length (Figure 2 ) The break-
1.
water included larger armor stone than the original structure.
Also included was a concrete monolithic breakwater head. Model
tests were conducted (Jackson 1961).
storms resulted in approximately
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,430,000in damages to the
1983
breakwaters.
Maintenance repair of the north and south breakwaters was completed
1985
included the placement of approximately
Capstones ranged in weight from 6-21
each.
structures presently are in
1986
39
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