Following a request by the Northern District Engineer of the Highways Department (dated 4th February, 1971) pump tests were carried out on 3 privately-owned bores between the 3rd and 11th of March, 1971. It was planned to test 4 bores but Bore 3 (see Fig.1) had to be abandoned after several attempts to remove 60ft. of 1 1/4 inch pipe which was wedged in the bore had failed. Highways Department personnel removed windmill pumps and reinstalled them on completion of the tests. The bores were tested using a Franklin submersible pump. Drawdown and recovery readings were made using an electrical depth probe attached to a tape. The top of the casing was used as a reference point. Levels were marked on the tape, and measurements adjusted relative to ground level, were made when convenient. As the pump tests proper were of only 4 hours duration and single-stage, and as no observation holes were available, the data were analysed using the Jacob method. The Jacob method is considered adequate because even though the tested aquifers appear to be unconfined, the drawdown for each bore relative to aquifer thickness is likely to be small. In the Jacob method 's' is plotted against log t and s' is plotted against log t/t/1. - where s - drawdown (ft) - s' - residual drawdown or recovery (ft.) - t - time since pumping started (minutes) - t 1 - time since pumping stopped (minutes) From the resulting Time-Drawdown graphs (see Figures 2, 3 and 4), Transmissivity (T) can be calculated and predictions of future drawdowns can be made. However, the method does not enable accurate drawdown predictions to be made for pumping rates other than the pumping rate during the test.