What we’re doing is we’re removing a structure that is subsea in order to widen the channel for ships to pass through safely. What that entails is the removal of approximately 4000 tons of concrete to depths of up to 52 feet. In order to accomplish the demolition of the structure, we mobilized dive teams that perform core drilling in specific locations on the structure.
The entire time the divers are drilling and tending the wire saws or rigging they’re in constant communication with the lead diver at the surface who is relaying information to the Curtin Maritime team to make sure that we’re performing demolition within the tolerances of the specifications.
This project was substantial enough to Curtin Maritime that Martin Curtin; the C.E.O. actually stepped in as barge master in order to facilitate the communication and make sure that it was being done as properly and efficiently as possible.
We then utilize those core drilled holes to run underwater wire saws and cut the structure into approximately 200-ton elements that will be lifted out from underwater. Those 200-ton elements are then lifted using 825-ton crane that we’ve mobilized on our Eel Pt. barge. One of the requirements of recycling the concrete was that it be clean concrete and the marine growth needed to be removed from it in order to deliver it to the Long Beach facility.