The proposal is to open up a hard rock quarry located about 4km east of Mundijong in the Darling Ranges. For the initial development period of 10-15 years, the quarry and infrastructure would be located on the area of mainly cleared land in the northwestern part of the site. Subsequently, the main granite quarry would be developed on the southern side of Manjedal Brook which will involve the construction of an access track and a crossing.

Following release of the EPA's report and recommendations, the Minister for Environment remitted the proposal under s43 for further assessment of the visual impacts of the proposal. See assessment no. 783.