Existence of high currents creates a real risk for
schedule and cost growth that must be addressed
early in the planning stages. Trade study and concept
of operations must be carefully thought through to
determine the best combination of marine assets to
use.
Burial of cable in high current areas may not be
possible due to the scouring effect of the high current
on the seabed. Generally speaking these high current
areas in shallow water have a geomorphology
consisting of hard rock bottom. The securing of the
cable on the seabed must be taken into consideration
to maintain the lifecycle of 25 years. Movement of the
cable along the abrasive seabed will create
maintenance issues in the future. In these situations,
drilling may present the best solution for secure cable
installation.
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