Large and rich deposits of copper were discovered at Moonta in 1861 by Patrick Ryan, a shepherd from Walter Hughes' property. This became a prosperous mine, named Wheal Hughes, with other mines soon to follow. The government town of Moonta was surveyed in March 1863, while an informal township of mining workers also grew at Moonta Mines. A horse tramway from Moonta to the port at Wallaroo opened in July 1866. Starting in the 1880s, agitation for conversion of the horse tramway to a steam locomotive railway commenced.