A while back the buggy bit of this quest used to read "Have 3 level 4 copper mine(s) in your zone."
Currently it looks like this:
Seems something went wonky when it was tweaked recently to include mines of a higher level and Industrial and Endless Mines, it also looks like it wants four level 4 mines, instead of the older three.
For reference the "1" it's counting in the screenshot is a level 6 Endless Copper Mine so that fix is good, now the text just needs sorting.