1978 – Zapadnaya Prospecting Syndicate (ZPS) formed
1984 – ZPS begins operating Badran on behalf of Indigirzoloto
1996 – ZPS acquires Kedrovka
June 1997 – ZPS acquires Badran license
July 1997 – Kedrovka commences production
Sep 2001 – Badran processing plant constructed
Oct 2004 – Kedrovka cyanidation plant constructed
Feb 2008 – Prospecting Syndicate is restructured into CJSC Ore Mining Enterprise Zapadnaya
July 2008 – Alexandrovskoye Core License acquired
July 2009 – Alexandrovsko-Davendinskaya area license acquired
Oct 2009 – Zapadnaya BVI incorporated
2012 – ZPS acquires Bazovskoye ore field license
2013 – Mining commences at Alexandrovskoye
2014 – Borovoye, Verkhne-Vitimkonskiye areas and Bazovskiye placers licenses acquired
Aug 2015 – Alexandrovskoye mine reaches target production level
2019 – Vitimkonsky area license acquired