This was posted by pmseeker on another forum. Thought it was worth reposting here. (pm- sorry if I stole your thunder!)

"Why you're not seeing the conveyors on the web cam in action is that they have alternate feed system for the mill and yes it is is operation. They have way more ore on site than what the camera shows. The pile in view has lots of oversize in it which needs processing before it gets to the mill.
Hope this helps clarify things."