Ewington Coal Mine

Ewington is an open cut thermal coal operation situated within the Collie River Mineral Field, South West Western Australia, approximately 200 km south-southeast of Perth. The site occupies the Collie Basin, a structurally complex Permian sedimentary trough. Proximity to the Wellington National Park and the Collie River catchment imposes stringent surface hydrological management obligations, requiring engineered diversion drains, sediment retention basins, and continuous water quality monitoring to protect downstream riparian ecosystems.

Ewington operates under receivership management (Alvarez & Marsal, 2022), maintaining continuity of coal supply to domestic power generators, primarily Collie-based thermal power stations. The workforce is predominantly sourced from the local Collie community under DIDO roster arrangements, reducing camp infrastructure dependency. B2B procurement cycles are currently subject to receivership oversight, meaning vendor contracts, supply agreements, and capital expenditure approvals require direct coordination with appointed receivers Sean Holmes and Grant Sparks.

The extraction methodology relies on truck-and-shovel open cut techniques across multiple pit benches within the Collie Basin stratigraphy. Run-of-mine coal is processed through a preparation plant utilizing a complex conveyor network for material transfer between pit face, ROM pad, wash plant feed, and product stockpiles. Key engineering challenges include:

• High overburden-to-coal strip ratios typical of Collie Basin geology
• Conveyor belt alignment maintenance across variable pit floor gradients
• Groundwater ingress management within active pit excavations
• Continuous ROM blending to meet thermal calorific value specifications

Ewington's ESG framework is anchored by proactive progressive rehabilitation of mined-out pit voids and overburden emplacement areas, aligned with Western Australia's Mining Rehabilitation Fund (MRF) obligations. Tailings and coarse reject storage facilities are managed under engineered containment designs with leachate collection systems. Key sustainability commitments include:

• Revegetation with endemic South West WA flora species
• Tailings facility stability audits per ANCOLD guidelines
• Surface water diversion to prevent acid mine drainage to Collie River
• Rehabilitation bond lodgement under DMP/DMIRS regulatory framework