Data as at 18 October 2026 · from Western Australian Government registers and open data

Western Australian mining project · Operating

Exmouth Limestone / Alcoa

Exmouth Limestone / Alcoa is a Western Australian mining project (operating) in MINEDEX, owned by Alcoa of Australia Ltd 100%, on 1 current tenement held by ALCOA OF AUSTRALIA LTD. Commodities: Limestone.

MINEDEX project: J02221
Stage: Operating
Owners (MINEDEX): Alcoa of Australia Ltd 100%
Tenement holders: ALCOA OF AUSTRALIA LTD
Parent groups: Alcoa
Commodities: Limestone
Rehabilitation liability: Its rehabilitation liability is in the MCF Mining Index (subscribers): the Mining Rehabilitation Fund estimate, its trend since 2014, company provisions and closure-plan costs

Resources and reserves

Commodity	Resources	Reserves	Latest estimate
Calcium carbonate	600 Mt at 54.0%, 324 Mt contained	—	30 January 2006
Limestone	600 Mt at 100.0%, 600 Mt contained	—	30 January 2006

Current MINEDEX estimates over all the project's sites; resources may include reserves. MINEDEX (DMPE), CC BY 4.0.

Tenements

Tenement	Holder	Status	Expires	Commodities	Hectares
M 08/6 Mining lease	ALCOA OF AUSTRALIA LTD	Granted	21 August 2047	Limestone	212