Newfoundland Transshipment Terminal
Placentia Bay, Newfoundland
The Newfoundland Transshipment Terminal was intended to be a stand alone oil transhipment terminal, required to accommodate shipment of crude oil from the Hibernia offshore oil production platform. The terminal is comprised of heated storage tanks with a working capacity of 1.5 million barrels of crude oil, an independent jetty, a causeway, a tug basin, utilities, offices, a warehouse, maintenance shops, access roads and other similar infrastructure. The terminal was expanded to accommodate crude oil from Terra Nova, increasing the capacity from 1.5 to 2.5 million barrels.
The work in question involved the construction of a jetty which included an approach trestle, a loading platform, four breasting dolphins and four mooring dolphins as well as the construction of a tug basin.
The term jetty refers to a dock which extends into the water. The loading platform is connected to the shore by an approach trestle connected with steel girders to form the spans. The first span of girders originates at the shore, on a concrete abutment.
Dolphins are marine structures for mooring vessels. Breasting dolphins are designed to take the impact of the ship when docking and to hold the ship against a broadside wind. The breasting dolphins are provided with fenders to absorb the impact of the ship and to protect the dolphin and the ship from damage.
The tug basin breakwater was constructed using concrete caissons. Caissons are box-like units with a closed bottom, with walls dividing the box into compartments. The use of concrete caissons enabled a large amount of work to be done in Argentia harbour, using a submersible barge. This method has the advantage of reducing the construction work performed over the water, an especially important consideration where the sea is rough and where the floating equipment is limited. Once constructed, the caissons were towed to the site of work. They were then filled with water and sunk in place, on a prepared foundation. The concrete caissons were then ballasted. A concrete slab was constructed on top of the caissons.
The project did not proceed as anticipated, encountering significant delays and cost overruns.
Revay and Associates was engaged by the owner to prepare an expert report evaluating the claim submitted by the contractor and perform an independent schedule analysis and damage calculation.