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Project
Mobilization: July 12- 20, 1999
Divers
from NOAA and the project construction contractor,
Team Land Development, completed a number of
pre-construction tasks to ready the site of the
Columbus Iselin grounding for restoration. These
mobilization activities included:
1)
checking mooring points on the bottom that will
anchor the construction barge in place over the
site;
2)
establishing a mooring point in deeper water in
case the barge needs to move away from the
sensitive reef area during severe weather;
3)
marking the work zone with distinctive buoys to
alert the public to avoid the area for safety
reasons;
4)
removing recreational mooring buoys from the work
zone; and
5)
conducting a test pour of the tremie concrete (in
deep water away from the reef zone) to determine if
there are any mix or turbidity issues.
The
construction barge arrived in the area on July 13,
but with winds at 15-20 knots and seas at 2-4 feet,
they could not proceed to the work site until July
20, when calmer conditions prevailed. Recreational
mooring buoys were pulled when the barge moved on
site. The deep water mooring point was established
and the construction zone marked.
The
underwater test pour of the tremie concrete mix was
initially delayed due to rough seas and a mixing
computer malfunction that caused delays in the
concrete supply. However, a successful test pour
was made and work on the first two spurs
began.
Worksite
Images
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Contractor's
barge being moved on site.
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A
batch pack (1 cubic yard) of specialized
marine tremie cement being emptied into a
concrete mixer located on the
barge.
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(top)
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