M E M O R A N D U M 8 confidence and significance ranking will assist in prioritising future groundwater investigations and is summarised in Table 2. No hydrological data exists for zones 1, 2 and 4. As no development is proposed for zones 1 and 2 they have a low significance. Zone 4 however contains the majority of the shaft sink and has therefore a large significance for the mine. Future hydrological investigations via diamond hole drilling and piezometer installation are strongly recommended for this zone. The zone with the next lowest data density is Zone 7, which contains the upper part of the shaft sink. It is recommended that this zone should also be further investigated. Table 2: Confidence and significance of hydrological data within the water zones. Zones highlighted in red are recommended main targets for future hydrological investigations. water zones No. water pressure sensors development area future development zone 1 0 future only shaft - lower zone 2 0 current+future 1175 zone 3 5 current+future 1175 zone 4 0 future only shaft acc + shaft zone 5 11 current+future shaft acc + 1175 zone 6 9 current+future production area zone 7 2 current+future shaft -upper zone 8 8 current+future minor Confidence + Significance
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