North Bay Resources Inc (NBRI)

[show-da-money]

It is possible that water could be a concern, if they open the lid of the mine it may be susceptible to water.
My understanding is that placer claims are where large water sources deposit gold as they rush by, so by virtue of being a place water would want to naturally occur then you probably wouldn't want to expose it to more water.

I have no mining experience, I am just making a conclusion. I more than likely am wrong. Spit balling here.