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Rex Minerals Hillside mine: program for environment protection and rehabilitation | Consultation on draft mininge regulations open 3 August to 11 September: make a submission | COVID-19 Updates for resources sector : fee relief | Accelerated Discovery Initiative Round 1 announcedExploreSA: The Gawler Challenge

Resource Iron Ore (Magnetite and Hematite)
CompanyOneSteel Manufacturing Pty Ltd (part of the SIMEC Mining Group)
Status Operating
Mining operation

Open-cut mines in the Middleback Ranges producing magnetite ore for steel production and hematite ore for export.

Some is also shipped to Port Kembla and Newcastle in New South Wales in the form of blended fines and pellets.

Location Middleback Ranges, southwest of Whyalla, Eyre Peninsula.middleback_range_blue
Tenement information

The Middleback Ranges Project comprises a number of tenements which are broadly considered under different mining areas.

Mining is undertaken in three areas with multiple pits, including:

  • South Middleback Ranges (SMR) mining area
  • Iron Baron mining area
  • Iron Knob mining area

Download map showing Middleback Ranges tenements via the South Australian Resources Information Gateway (SARIG).

The deposit

Magnetite and hematite deposits found within the Middleback Ranges that forms part of the Cleve sub-domain of the Gawler Craton, comprised primarily of Early Proterozoic metasediments of the Hutchison Group.

Resource estimates and production estimates

Company released resource estimates and production statistics for South Australia's major operating and approved mines are summarised in South Australia's major operating/approved mines: resources estimates and production statistics (PDF, updated regularly).

Approval process

Programs for environment protection and rehabilitation have been submitted and approved for each mining area.

Current documents 

Mining proposal

Program for environment protection and rehabilitation (PEPR)


For more information, contact:

For inquiries relating to this mining operation please contact: Mining Regulation
Mineral Resources Division
Department for Energy and Mining
Phone: 8429 2583