Dwarves still in the Ered Mithrin?

[Ghazi]

Originally Posted by Kuruharan

I...the orc center of Gundabad was formerly a dwarf center of Gundabad until around TA 1300-1409 (to the best of my guesstimation).

I recall reading somewhere that Mt. Gundabad was the location where Durin awoke but I've never read that it was the location of a dwarf city. Where is that information located? My understanding was that once Durin awoke he migrated down to the future location of Khazad-dum. Given the approximate date above, did the Witch King's forces drive the dwarves from their Gundabad location?