portman mining ltd coal mine,Portman Mining Ltd Coal Mine - Burton Coal - Queensland Australia .Burton is located in Queensland's Bowen Basin, 150km south-west of the coastal town of Mackay. It produced its first coal in November 1996. An open-pit operation, Burton has a production capacity of around 4.5Mt/y, with 80% of its output being high-quality coking coal for the export market. Annual production is now up.portman mining ltd coal mine,Burton | Thiess | MiningLink - The largest & most visited mining .The Burton coal mine, that was originally owned by Portman Mining Limited, before being sold to RAG Australia, is now majority owned by Peabody Energy Australia, who have contracted out the mining operation to Thiess. A mining contractor who also designed and constructed the mine in the first instance. Thiess is also.