The North East Dundas Tramway (NEDT) was a 2 ft (610 mm) gauge tramway on West Coast Tasmania that ran between Zeehan and Deep Lead (now Williamsford). It was part of Tasmanian Government Railways. The world's first Garratt locomotives TGR K Class were used on the line, as were two G Class 0-4-2T engines built by Sharp-Stewart of Glasgow in 1896 and a massive 'J Class' 2-6-4-0T articulated locomotive manufactured by Hagans of Erfurt in 1900.
The line was opened in 1896 to carry ore from the Williamsford mines (mainly the Hercules Mine) to Zeehan where it would be loaded onto another train for shipment to Burnie. The narrow-gauge (2 ft) was chosen because of the extremely difficult terrain that the railway crossed, requiring several big trestle bridges, including one at the foot of Montezuma Falls. After some rain the engine and carriages would get soaked by spray from the falls. There was a break-of-gauge with the mainline 1,067 mm (3 ft 6 in) system at Zeehan.
Source: Mostly Wiki