Quote Originally Posted by BushMasterBoy View Post
Some of the old mines drain water trapped in the rock. The acidic water can be treated electronically using carbon fiber high area cathodes and solar power. Technology can produce astounding results, but so far seems undeveloped. Until then, billions of gallons of water is wasted.

https://www.denverpost.com/2015/08/1...-state-rivers/
I think there are any number of potential solutions, whether it's big desalinization plants to produce fresh water from the ocean (some Middle Eastern countries are doing this now) or having a big pipeline project to bring water in from another basin. Right now these solutions aren't cost effective but when the population pressure gets high enough to warrant the expense, I figure an answer will be found.