Two additional phases of the drilling program to assess the groundwater resources in the Clare Valley were undertaken during March 1998 at Wendouree (Phase III), and during July 2000 at Wendouree and Watervale Oval (Phase IV). The Phase III program involved the installation of four new monitoring wells and deepening of an existing well from the Phase II drilling. The deepened well was equipped with a cluster of piezometers to enable monitoring of distinct depth intervals for chemistry and hydraulic head data. The Phase IV program involved the installation of six new wells; three at Watervale Oval and three at Wendouree. Sections of core were recovered from one of the wells at Wendouree to provide mineralogical and pore-water chemistry data on the formation. The new wells at Watervale Oval will be used for aquifer storage and recovery (ASR) trials and investigating the benefits of hydraulic fracturing to improve well yields in fractured rock aquifers. The wells at Wendouree will facilitate future applied tracer tests to determine fracture connectivity and hydrogeologic characteristics at the site. At both Wendouree and Watervale, anisotropy of hydraulic conductivity will be examined by conventional aquifer tests combined with azimuthal resistivity surveys.