The rig to reef (RTR) program is considered to be more economically and environmentally friendly than the total removal, as the structure is not entirely removed from the sea. There are four main techniques used during the RTR program::
a)Leaving the structure in situ
b)Sinking the structure
c)Cutting the upper part of the structure at 85 feet below the sea level and placing the remaining part on the sea bed
d)Towing the entire structure to another site and sinking it
Source: Macreadie, 2011
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