The subject of this article originates from non-canonical sources. To find out about what is considered "canon" see LOTR:Canon.
It was created specifically for Middle-earth Role Playing, and is non-canonical.
For men, the existence of Zarak Dûm is but a rumour, since the city was abandoned in the century before the coming of the Witch-king, in the Third Age. The dwarves of Zarak Dûm were victims of a devastating plague, and very few survived to report the disaster to their king. The tumultuous events of the north in the following centuries prevented the reoccupation of the city. Since then, it has been the home to Scorba the Worm.