1942 - Bauxite discovered in Jamaica. 

1943 - A shipment of approximately 2,500 tons of ore was sent to North America for process investigation, which revealed that the Jamaican bauxite could not be processed in the Bayer alumina plants then in operation. 

1946 - Alcan formed the Agricultural division to improve the agricultural productivity of bauxite deposits. 

November 1950 - Construction began at Kirkvine Works. 

May 1952 -  In anticipation of the Plant start-up, commercial mining began and alumina was first produced in December of that year. 

1952 to 1954 -  Shipping facilities built at Port Esquivel, near Old Harbour, St Catherine.   The Port handled alumina shipment and  raw material imports.

January 1953 - Alcan's first shipment of alumina was a bagged cargo consigned to a Norwegian Smelter. 

1956 to 1959 - The second plant, Ewarton Works, was built to utilise bauxite deposits in St Ann. 

1968 - Both Kirkvine and Ewarton Works expanded to a production capacity of 547,500 tons, some thirty times the capacity envisaged when Kirkvine Works was originally designed. 

1986 - Construction of alternative mud disposal facility, mudstacking and drying, started in Ewarton Works.

1986 - First hydrate shipment of 6,018 sent to the United States.

1997 - Laboratories received ISO 9002 accreditation.

2000 - Operations received ISO 14001 accreditation

June 1, 2001 - Glencore Alumina Jamaica Limited acquired Alcan's 93% interest in the joint venture between Alcan and the Government of Jamaica-owned, Jamaica Bauxite Mining Limited.

2001 - WINDALCO sets production record of 1,241,349 tonnes

2002 - WINDALCO's safety management system accredited to Level 3 of the International Safety Rating System (ISRS).

2003 - WINDALCO sets new production record of 1,263,000 tonnes

2004 - WINDALCO was awarded seven of ten major awards (safety) and all three environment awards for its 2003 performance at the Ministry of Mining and Energy's (Mines and Geology Division) Minerals Industry Awards.

2007 - Glencore's Alumina assets merged with RUSAL and SUAL to form UC RUSAL.  Through this merger, UC RUSAL now owns 93% shares in WINDALCO.  The Government of Jamaica continues to own the other 7%.