The Troll A platform is a condeep offshore natural gas platform in the Troll gas field off the west coast of Norway.
At 1.2 million ton ballasted under tow, 472 meters high, with a underwater concrete structure at 369 meters, and a dry weight of 656,000 tons, the Troll A platform is a majestic piece of design and construction. Not only is the Troll A platform one of the largest and most complex engineering projects in history, it is the largest object that has ever been moved by mankind across the surface of the Earth.
It was a televised sensation when the platform was towed over 200 kilometers from Vats, in the northern part of Rogaland, to the Troll field, 80 kilometers northwest of Bergen. The tow took seven days.
The platform stands on the sea floor 303 meters below the surface of the sea. One of the concrete cylindrical legs has an elevator that takes over nine minutes to travel from the platform above the waves to the sea floor.
The Troll A platform has twice set a Guinness World Record. One in 1996 for the largest offshore gas platform, and one in 2006 for the deepest underwater concert, when the platform’s 10th anniversary was celebrated with a concert by Katie Melua held at the base of the platform.
The platform is operated by Statoil.