The VES data could be clearly correlated with well data at two locations. Once calibrated against drilling results, the resistivity soundings could be assembled with geologic observations to generate a conceptual model of the local hydrogeology. Most valuable for this study, resistivity soundings proved sensitive to a transition between lower resistivity fractured basement and higher resistivity unfractured basement. This result was key to identifying a significantly thicker fractured basement section in the southern zone than in the more variable central and northern zones. Within the southern zone, fracture basement thickness increases progressively to the south. Well site selection in the southern zone based on the VES data was successful.