It is by no means clear that Yucca Mountain is the proper site for radioactive waste disposal. From the article:
"It is still not completely clear whether Yucca Mountain would be a good place to bury radioactive waste. Despite the Energy Secretary's 2002 seal of approval, there are legitimate scientific concerns about the suitability of the site. An independent US Nuclear Technical Waste Review Board said PDF it had "limited confidence" in the Energy Department's performance estimates for Yucca Mountain because of "gaps in data and basic understanding." As Gary Taubes observed in Technology Review in 2002, "By choosing Yucca Mountain as the only option for a nuclear-waste facility, Congress put the DOE in an untenable position. In effect, it sent the department out to prove that Yucca Mountain would work as a repository, rather than to do a dispassionate analysis of whether it could work or was the best possible site." "
Yucca Mountain, IRRC, is rather close to Vegas and the site actually has some history of water migration, even over the past 50 years. Admittedly I'm working off of a memory of a report I read a decade ago. Here's the link FWIW: http://www.environmentalreview.org/archives/vol07/ewing_abstract.html