Across the first half, management cited Queensland production of 10.3 million tonnes and New South Wales production of 9.7 million tonnes. In the December quarter, Queensland ROM production totaled 5.6 million tonnes and New South Wales ROM production totaled 5.4 million tonnes. Blackwater produced 4.0 million tonnes, up 24% from September, while Daunia produced 1.6 million tonnes, up 11%. Gunnedah operations produced 0.9 million tonnes, with 0.6 million tonnes from Vickery and 0.3 million tonnes from Tarawonga, which management described as reliable performance. About Whitehaven Coal (ASX:WHC)Whitehaven Coal Limited develops and operates coal mines in New South Wales and Queensland.