HVO 2009 Annual Environmental Management Report - Final

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Coal & Allied – Hunter Valley Operations Table 13: 2009 HVO Water Balance Water Stream Volume (ML) Inputs Fresh Water 26 Groundwater 1251 Rainfall Runoff 7,485 Recycled to CHPP from Tails & Storage (not included in total) 3,786 Imported (Liddell) 10 Water from ROM Coal 1,196 Total Inputs 9,969 Outputs Dust Suppression 1,533 Evaporation - Mine Water & Tailings Dams 2,034 Entrained in Process Waste 1,812 Discharged (HRSTS) 192 Water in Tailings (not included in total) 3,339 Water in Coarse Reject (not included in total) 544 Water in Product Coal 1,100 Total Outputs 6,672 Change in Storage (increased) 3,297* * Estimated value using the OPSIM daily water balance model. The measured change in storage for 2009 was an increase of 3,124ML, this compares to the OPSIM model result of 3,297ML, indicating good agreement between measured and estimated water balances. AEMR 2009 39
Coal & Allied – Hunter Valley Operations Groundwater 1,251 ML (E) Coarse Reject 544 ML (E) LEGEND Affected mainly by geometry eg depth, length and geology. Affected mainly by climate Rain 7,485 ML (E) Tails 3339 ML (E) Affected mainly by process eg production rate, moisture control Affected both by climate and process Evaporation 2,034 ML (E) Recycled Tails 1658 ML (E) Affected by geometry, geology and process (M) = Measured (E) = Estimated Dust Suppression 1,533 ML (M) HRSTS Discharges 192 ML (M) Open Cut Pits & Pit Storages Coal Processing Plants Internal Recycling 460 ML (E) Product Coal (M) 1,100 ML Lost to Tails and Spoil 1,812 ML (E) Dewatering & Storage 2,093 ML (E) Fresh 26 ML (M) Storage 3,297 ML (M) ROM Coal 1,196 ML (E) External (Poor) 10 ML (M) Figure 9: HVO Water Balance Schematic AEMR 2009 40
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HVO 2009 Annual Environmental Management Report - Final

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