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GGI recently presented a paper providing results of a survey of Springs and wells in the Pahrump Valley, and springs in the Spring Mountains to evaluate sources and timing of recharge to the Pahrump Valley aquifer. GGI Senior Geologist Paul Drakos presented this study, which was conducted in conjunction with the Nye County Nuclear Waste Repository Office (NWRPO) and the University of New Mexico (UNM). The alluvial aquifer is the main source of water for municipal, domestic, and irrigation wells in the valley. In addition, spring discharge has been utilized for irrigation, mining and domestic uses but also maintains critical habitat. Water samples were analyzed for major anions and cations, hydrogen, oxygen and carbon isotopes, and, for a subset, helium isotopes.