PHASE 3: MONTH 51 to 72
INFLOWS
OUTFLOWS
1752 ML/ann Dee River and Sludge
DOR WTP
1752 ML/ann
0
DOR WTP Transfer
1752 ML/ann
786 ML/ann
DOR WTP Transfer
465 ML/ann
Seepage Pumpback
Enhanced Evaporation
303 ML/ann
495 ML/ann
Rainfall and Runoff
Natural Evaporation
OCP
486 ML/ann Seepage Losses
-2291
183 ML/ann OCP to SSG
Pumped Transfer
0 ML/ann Return water to plant
0 ML/ann
1 ML/ann
OCP to SSG Pumped Transfer
Seepage Losses
411 ML/ann
11 ML/ann
Rainfall and Runoff
Natural Evaporation
SSGArea
31 ML/ann
0 ML/ann
Basin 1&2 Spill
Water retained in Tailings
430
0 ML/ann
0 ML/ann
Bleed Water to SSG
Return water to plant
0 ML/ann
3394 ML/ann
Return water to plant
Tailings Water to SSG
146 ML/ann Raw water from external source
Process Plant
403 ML/ann Ore Moisture
0 ML/ann
0
2846 ML/ann UMG to plant
OCP to plant
2846 ML/ann
Tailings water to UMG
Return water to plant
183 ML/ann OCP to UMG
3394 ML/ann
166 ML/ann
80 ML/ann
Rainfall and Runoff
Natural Evaporation
UMG TSF
557 ML/ann Water retained in Tailings
260
NET SYSTEM BALANCE:
-1600
Figure A.3
Simulated mean forecast water balance for Phase 3 (with UMG as the TSF)
12624987 | Heritage Minerals EA Amendment Application – Updates to Water Balance Model July 2025 (Final) 14
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