For more on the history of ERA, visit the complete collection of annual reports from 1981 to present. 

1969 - Discovery

The Ranger ore bodies were discovered in 1969 by Electrolytic Zinc Company of Australasia (EZ) and Peko-Wallsend Operations Limited (Peko).

1980 - Floated

Energy Resources of Australia was established in February 1980 and in July of the same year, floated on the Australian Stock Exchange in what was at the time the largest ever public float in Australian history.

1981 - Commissioning

Plant commissioning began in July 1981 and the first ore was fed into the mill in August 1981 with the first drum of uranium oxide produced on 13 August 1981. Commissioning continued through to the end of September.

1981 - Official opening

The Ranger uranium mine officially began operations on 1 October 1981. ​Ore was drawn from Pit 1 which was open cut mine. 

1994 - Pit 1 finished

Mining of Pit 1 finished in December 1994. During that time 19.78 million tonnes of ore was mined.

1997 - Pit 3 commenced

Mining from Pit 3 commenced in July 1997 and concluded in November 2012. Since mining finished in Pit 3, ERA has produced uranium oxide from stockpiled ore.

2000 - Rio Tinto Group

ERA and its owner, North Limited acquired by the Rio Tinto Group

2009 - Underground discovery

In 2009, ERA announced the discovery of the Ranger 3 Deeps underground resource. 

2011 - Approved

In August 2011, ERA approved $120 million for construction of an exploration decline to conduct close spaced underground exploration drilling and to explore areas adjacent to the Ranger 3 Deeps resource.

2015 - Board decision

A prefeasibility study was undertaken into the Ranger 3 Deeps project and in June 2015, ERA’s board made that decision that the project should not proceed to Final Feasibility Study in the current operating environment. The Ranger 3 Deeps decline and associated infrastructure remains on care and maintenance.