Veins (rich or otherwise) still use water both in the mining and recovery processes. Regardless whether you are using gravity separation, flotation or cyanide leaching, you are still using water. A lot of it, in fact.
Yes, it snows in Nevada in the winter (hence the name Nevada which is derived from the Spanish word for snow). Yes, snow is water. So... where are you going with this? Not digging up snow to use for water I hope.
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