The submarine, described as the underwater Chernobyl, sank with 1,800 canisters of toxic mercury in the Sea off Bergen.
The German U-Boat was torpedoed by a British Submarine in early 1945 as it was en-route for Japan carrying jet parts.
The Nazi vessel, the U-boat 864 departed from Kiel on December 5, 1944, but after it was damaged in an attack, its captain decided to travel to Norway in order to repair the sub.
However, the sub was never repaired and the sunken U-Boat has remained at a depth of 500 feet below the surface, split into two parts.
The sub is located some two miles from Fedje, an island inhabited by around 600 people. And ever since it sank, the sub has been leaking dangerous mercury into the sea from its rusted, deteriorated containers.
According to scientists, as much as 4 kilograms of toxic material has spilled into the water of the Norwegian Sea, causing the area to be off-limits for fishing vessels.
To contain the leak, the Norwegian government wants to seal off as much as 11 acres of seabed, in order to bury the sub under 40 feet of rubble to prevent the toxic material from further contaminating the water.
To get the job done, a specially built-rig was developed by Dutch contractors that will allow them to dig around the sub without damaging the already deteriorated hull.
The massive burial operation which is estimated to cost more than $30 million is expected to start in 2019 and get the job done by 2020.
“We developed and built a specialized rig and used an ROV (Remotely Operated Vehicle) to install pressure probes at six different places on the seabed which will be covered by the counter-fill,” explained Stephen Hayes, senior specialist with Norwegian Geotechnical Institute’s (NGI) Section for Instrumentation and Monitoring.
“The purpose of the probes is to measure the stabilization rate of the sediment during the filling process.”