Development of Las Cristinas is going to be a huge effort. There was a post a while back that had a video of what the project entailed.

OMG! They have to divert a river around the mine site before they can even consider starting to mine it.

I'm not sure what sort of effort GRZ has to do in order to get at their gold but for KRY it looks like it's going to be pretty tough... a good job for a Canadian company if you ask me...