A significant derailment occurred on Aurizon's 1021km electrified Goonyella System this afternoon at around 1.00pm. Thirty wagons are reported derailed south of Dysart on the Oaky Creek cross-country link, near the junction for the Middlemount branch. Substantial infrastructure damage has resulted, including the downing of overhead catenary, which has caused a number of grass fires. The fires are reported contained, and there have been no injuries to crew or attending rescue crews. Very early reports suggest it was an empty Aurizon service involved, but this hasn't been officially confirmed. Road access to the scene is apparently very limited, with the derailed train blocking some access points.