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

Western Australian mining project · Care and Maintenance

Lake Seabrook Gypsum

Lake Seabrook Gypsum is a Western Australian mining project (in care and maintenance) in MINEDEX, owned by Lake Hillman Mining Pty Ltd 100%, on 1 current tenement held by LAKE HILLMAN MINING PTY LTD. Commodities: Gypsum.

MINEDEX project: J01463
Stage: Care and Maintenance
Owners (MINEDEX): Lake Hillman Mining Pty Ltd 100%
Tenement holders: LAKE HILLMAN MINING PTY LTD
Commodities: Gypsum
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
Gypsum	4.12 Mt at 83.7%, 3.4 Mt contained	—	1 January 1958

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

Production recorded in MINEDEX

Commodity	Latest year	That year	All recorded
Gypsum	1959	19 t	18 kt

Historical: the bulk extract's production records end in 2002.

Tenements

Tenement	Holder	Status	Expires	Commodities	Hectares
M 77/1269 Mining lease	LAKE HILLMAN MINING PTY LTD	Granted	16 December 2035	Gypsum	252