However , dumping in the sea stopped in 1992 when the International Convention for the Prevention of Pollution from Ships prevented further dumping in the North Sea .
The barges were loaded by silos situated at a special dock to the east of the stations .
Dumping in the sea stopped in 1992 when the International Convention for the Prevention of Pollution from Ships prevented further dumping in the North Sea .
The barges were loaded by silos situated at a special dock to the east of the stations .