Wilpinjong is a large, low cost, surface mine in the western coalfield of the Sydney Basin producing thermal coal for both domestic and export markets. With a raw production capacity of around 16 Mtpa, Wilpinjong is among the largest coal operations in Australia. Wilpinjong is located 10 kilometres south-east of Glencore's Ulan mine and 40 kilometres north-east of Mudgee. Mining activities take place within ML 1573. This report analyses the planned extension project at Wilpinjong. For our analysis of the operating mine, refer to the report titled 'Wilpinjong coal mine'.