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

Western Australian mining project · Care and Maintenance

Kalgoorlie - Boulder / Holcim

Kalgoorlie - Boulder / Holcim is a Western Australian mining project (in care and maintenance) in MINEDEX, owned by Holcim (Australia) Pty Ltd 100%, on 2 current tenements held by HOLCIM (AUSTRALIA) PTY LTD; NORTHERN STAR (KLV) PTY LTD; NORTHERN STAR (SARACEN KALGOORLIE) PTY LTD. Commodities: Gold, Silver.

MINEDEX project: J00840
Stage: Care and Maintenance
Owners (MINEDEX): Holcim (Australia) Pty Ltd 100%
Tenement holders: HOLCIM (AUSTRALIA) PTY LTD
NORTHERN STAR (KLV) PTY LTD
NORTHERN STAR (SARACEN KALGOORLIE) PTY LTD
Parent groups: Holcim
Northern Star Resources
Commodities: Gold, Silver
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

Mine closure plans

Site	Operator	Latest plan approved	Plan (PDF on GeoDocs)	Closure year
KCGM Golden Mile / Fimiston / Kaltails - Golden Mile/KCGM and Kaltails	NORTHERN STAR (KLV) Pty Ltd, SARACEN MINERAL HOLDINGS Limited	19 September 2025	MINE CLOSURE PLAN - KCGM Golden Mile / Fimiston / Kaltails MCP 2022 Version 2 - J00102 Gol	2021
Kalgoorlie Consolidated Gold Mines	Kalgoorlie Consolidated Gold Mines Pty LIMITED	27 November 2015	Kalgoorlie Consolidated Gold Mines - Mine Closure Plan March 2015	2019

EPA Ministerial Statements

MS 1258 Fimiston Gold Mine Operations Extension (Stage 3) and Mine Closure Planning: Revised Proposal - Fimiston South Project, MS 782 Fimiston Gold Mine Operations Extension (Stage 3) and Mine Closure Planning, MS 505 Mining of gold ore from Reward and Northern orebodies adjacent to Mt Charlotte, Kalgoorlie, MS 77 Phase II Expansion of Gidji Gold Roaster

Tenements

Tenement	Holder	Status	Expires	Commodities	Hectares
M 26/22 Mining lease	HOLCIM (AUSTRALIA) PTY LTD	Granted	21 June 2025		23
M 26/383 Mining lease	NORTHERN STAR (KLV) PTY LTD; NORTHERN STAR (SARACEN KALGOORLIE) PTY LTD	Granted	16 July 2034	Gold, Silver	651