3.3.5 Clean water diversion No clean water diversion drains have been simulated in this study. For the Upper Mundic Gully TSF, the contributing catchment is very steep and small relative to the size of the TSF. Further, this system would function as a sink, requiring a sump and pump system to remove the clean water. As such, there is no significant benefit in including clean water diversions upstream of the TSF, especially given the complexities that the steep slopes would add. However, for the OCP, a coffer dam wall has been constructed between the SSG and the OCP. As such, this will effectively keep the mine impacted stormwater runoff generated upstream of this coffer dam out of the OCP, acting as a form of catchment segregation and aiding in water management. The SSG has no outlet from the mine site, other than through evaporative losses.
12624987 | Heritage Minerals EA Amendment Application – Updates to Water Balance Model July 2025 (Final) 6
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