Supplementary data The raw inputs used to develop the systems representation of the site water balance are presented below. Tasks and tailings facility are distinguished using grey headings; stores are distinguished using blue headings. For quantification of the flows, site documentation were used as reported in the year 2010. For the characteristics of the storage facilities (e.g. surface area/volume), site reports from 2008 and 2012 were used. The final column indicates the confidence in the accuracy of the values. Variable Data source Units Value adopted Confidence Task - Processing plant Water with feed Calculated from site documentation ML/month 27 Medium Underground dewatering to Flows calculated from site documentation. Process worked water store Underground to process thickener 152 Medium plant Assume that make-up comes from sources process pond. (Make up required) = Worked water store (Coarse tails) + (fine tails) - (UG water) - to process plant (Water with Feed) ML/month 286 Low Water in product Site documentation ML/month 0 N/A Process in fine tailings See TSF inputs N/A plant Flows calculated from site documentation. outputs in coarse Dry coarse tailings is 3,830,785t/year with tailings 10% moisture ML/month 35 Medium Discharge Estimate from discussion with site ML/month 152 Low Site Object - Tailings surface area Site documentation ha 125 High Tailings Site documentation (volume of new + old properties Void volume tailings) ML 2500 High From site documentation, dry tonnes tailings flow is 3,443,315t/yr with 60% moisture Fine content 430 Medium Site documentation (catchment area of new Tailings Catchment area + old tailings) ha 305 High input Site documentation (assume all disturbed as Proportion disturbed catchment is stockpile/mine) % 1 High Site documentation - assume 25% tailings entrainment. Dry solids flow = 3.44Mtpa. Tailings loss (via Therefore solids + water entrained = entrainment) 4.59Mtpa ML/month 96 Low Tailings Tailings decant outputs return See WWR input Underdrains to Worked Water Store See WWR input
Supplementary data The raw inputs used to develop the systems representation of the site water balance are presented below. Tasks and tailings facility are distinguished using grey headings; stores are distinguished using blue headings. For quantification of the flows, site documentation were used as reported in the year 2010. For the characteristics of the storage facilities (e.g. surface area/volume), site reports from 2008 and 2012 were used. The final column indicates the confidence in the accuracy of the values. Variable Data source Units Value adopted Confidence Task - Processing plant Process plant sources Water with feed Calculated from site documentation ML/month 27 Medium Underground dewatering to worked water store Flows calculated from site documentation. Underground to process thickener 152 Medium Worked water store to process plant Assume that make-up comes from process pond. (Make up required) = (Coarse tails) + (fine tails) - (UG water) - (Water with Feed) ML/month 286 Low Process plant outputs Water in product Site documentation ML/month 0 N/A in fine tailings See TSF inputs N/A in coarse tailings Flows calculated from site documentation. Dry coarse tailings is 3,830,785t/year with 10% moisture ML/month 35 Medium Discharge Estimate from discussion with site ML/month 152 Low Site Object - Tailings Tailings properties surface area Site documentation ha 125 High Void volume Site documentation (volume of new + old tailings) ML 2500 High Tailings input Fine From site documentation, dry tonnes tailings flow is 3,443,315t/yr with 60% moisture content 430 Medium Catchment area Site documentation (catchment area of new + old tailings) ha 305 High Proportion disturbed Site documentation (assume all disturbed as catchment is stockpile/mine) % 1 High Tailings outputs Tailings loss (via entrainment) Site documentation - assume 25% tailings entrainment. Dry solids flow = 3.44Mtpa. Therefore solids + water entrained = 4.59Mtpa ML/month 96 Low Tailings decant return See WWR input Underdrains to Worked Water Store See WWR input
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