8
Future works
The following work will be required for the detailed design of the Upper Mundic Gully TSF:
— Development of a scope of works and execution of geotechnical investigation (refer discussion in Section 7.8) — Development of a geological ground model using available survey, aerial imagery, and geotechnical investigations — Seepage and stability assessment based on geotechnical investigations — Design of the tailings slurry pumping and delivery system — Water balance development to
— Determine the DSA requirement — Size the return water pump system — Size the final stage spillway sizing — Provision of an allowance for operational decant pond — Assess suitable location and undertake design of the emergency spillway — Design of access and haul roads into Upper Mundic Gully — Conceptual closure design — Preparation of construction drawings and documentation.
Project No PS213278 Upper Mundic Gully TSF Concept Design to RL 390 m Mount Morgan Project Heritage Minerals
WSP October 2025 Page 17
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