The Cadia Hill gold mine is located in Orange, NWS. The mine is 600m wide and roughly 1.9km below the surface, it is one of the largest gold and copper mine in the world and opened in 1998 and closed  in 2022. The Cadia Hill mine is an open pit mine, they mine gold and copper, they extracted the gold and copper by digging deep hole where the ores are located, open pit mining is used when the ores are close to the surface. In 2021 Cadia Hill mine $2,093,322 from their gold and $142,724 from their copper, around November 1928 the Cadia Hill town was in rapid decline, Cadia lost it police presence by January 1929, Cadia Public School, which had opened in December 1865, closed in May 1930, Cadia Post Office, which opened on 1 August 1864, closed on 29 March 1935,  By 1940, just the old school building and two residences survived. If you get too close to an open edge of workings, there is the potential to fall into the open pit or The weathered ground around these areas can subside or break away under vibrations from a vehicle or under a person's weight. This year there has been a investigation because of mine worker was seriously injured when changing components of a Jumbo drill rig at Cadia East Underground Mine on 19 June 2023. The Jumbo drill rig was being used to conduct drilling, bolting, and meshing. The Wiradjuri people were the first nations people in the Cadia area,the Wiradjuri people have lived in Cadia for more than 40,000 years. When the Europeans came and colonized they diminished the Wiradjuri peoples traditional ways, this caused the Wiradjuri and Aboriginal people population to decimate. The Wiradjuri people had no say in the mine opening.