Mount Morgan Mine Upper Mundic Gully TSF EA Amendment

Mine Feature

Operational Activities Construction of tailings embankment Monitoring of seepage within embankment through installation of piezometers Previously disturbed areas to be used for workshops, administration areas and support services.

Mining Contractor (Services) Yard

Haul Roads

Mining Support Infrastructure

Powerlines

Mining Support Infrastructure

Non-Potentially Acid Generating (NPAG) Stockpile

Source of TSF embankment and rehabilitation materials.

Slag Stockpiles

Source of TSF embankment and rehabilitation materials.

Tim’s Tube

Transport of process water and tailings

Lachlan’s Laydown

Laydown yard

Paterson’s Patch

Onsite nursery

Craig’s Clod Topsoil stockpile Justification for the changes described in Table 9 are as follows: ∕ Inclusion of the Upper Mundic Gully TSF in Table F2 is required to commit rehabilitation obligations and final land use outcomes; ∕ The final and use for the Upper Mundic Gully TSF is proposed as Native Ecosystem to achieve a post mining land use (PMLU). Further information regarding the appropriateness of the PMLU is provided in Section 7.5.2.1; ∕ The rehabilitation commitments applied to Upper Mundic Gully TSF are intended to match existing commitments for Sandstone Gully TSF where possible, however acknowledge that there are no latent tailings present within the Upper Mundic Gully TSF footprint that require movement and treatment; and ∕ Removal of the exploration mine feature is to ensure consistency with proposed amendments to Table A1 of the EA. Table 9. Proposed Table F2 Replacement

Mine Feature

Rehabilitation

Final Land Use

Land Suitability Objective

Process Plant & ROM Pad Remove all plant

Land management monitoring and maintenance of rehabilitated areas

Class 4

Pipe Corridor

Remove all pipes and support infrastructure Remove all pipes and support infrastructure

Class 4

Tim’s Tube

Class 4

Part of No. 2 Mill Tailings Dam

Remove remnant sulphidic dam wall that directly impacts the mining of the tailings. Batter and stabilise remaining waste dump faces. Expose and reinstate original drainage in rehabilitated areas. Remove remnant sulphidic dam wall that directly impacts the mining of the

Class 4

Land rehabilitated to

Mundic Sulphide Tails

Project number: 25B061

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