Ann: Quarterly Activities Report, page-65

From TIG Quarterly: Coking coal still looking good. PCI around 70 to 75% of Premium Coking price. So for BBM PCI: 75 to 85% of Coking coal due to desirable properties very low ash, low sulphur, low moisture, ultra low phosphorous, extra high heating value.
Coal Outlook
The metallurgical coal market in Asia has remained strong during early 2019. Premium low volatile hard coking coal (HCC) prices (FOB Australia) closed the 2018 year at around US$227/t and are holding at ~US$215/t as at the end of March 2019. Australian supply remained tight due to continuing restrictions on rail capacity. Russian supply has been restricted as usual by the winter season. In the face of sustained demand, the inability of producers to increase production has resulted in the continuation of strong pricing from 2018 into 2019.