Thevenard, at the Gypsum Resources Australian (GRA) gypsum unloading site, 1604 leads a triple consist of Clyde Engineering EMD JL22C model 1600 / NJ class combination of 1604 serial 71-731 and originally NJ 4, NJ 3 serial 71-730 and 1601 serial 71-728 class leader NJ 1, all three units started on the Central Australia Railway in 1971 and were transferred to the Eyre Peninsula in 1981. 1604 and 1601 both renumbered in 2004. Friday 13th January 2006.