SRK was selected by Newmont Mining Company to conduct baseline hydrogeologic studies to support dewatering plans and predict impacts from dewatering associated with a planned mine expansion. SRK assisted Newmont with numerous field activities, including the installation of a monitoring network in an adjacent large springs-and-wetland complex, and conducting pumping tests. The hydrogeologic investigations focused on obtaining a better understanding of a carbonate aquifer, the degree of hydrologic connection between the carbonate aquifer and abutting basin-fill aquifer, and the interaction of both aquifers with the wetlands. SRK also developed geochemical and pit lake models and assisted with the construction of a pilot Rapid Infiltration basin (RIB) to predict RIB performance and to help evaluate candidate locations.The results of the field programs produced a body of work that led to the development of a regional-scale, multi-basin 3D numerical groundwater flow model. Once calibrated, the model provided dewatering estimates during the LoM and estimates of impacts to groundwater which included the wetlands, and a municipal water supply well field. SRK worked with Newmont during technical discussions in meetings with the regulatory agencies which have accepted the groundwater flow and pit lake models as baseline studies to the EIS that is in preparation.
