Two potential evaporation sites have been delineated within 20 km south and southwest of Waikerie following the drilling of 31 shallow rotary holes. A further two sites were outlined between Cadell and Waikerie as a result of an inspection of Geological logs of previously drilled holes. Although the groundwater mound beneath Waikerie has been shown to be continuously growing the time required for the water level to reach a critical level has not been determined.