in 1878. The Burra line was extended to Terowie in 1880. The Barossa Valley railway line was built from Gawler Junction, north of Gawler station, through what is now Gawler Central station, to Nuriootpa and Angaston in the Barossa Valley in 1911. A further branch was constructed from Nuriootpa to Stockwell and Truro. The Penrice branch to the quarry from near Stockwell was the last destination to operate beyond Gawler Central. A branch line was built from Riverton to Clare in 1919 and Spalding in 1922. This line was lifted in the early 80s and parts of it have been restored as the Rattler Trail (Riverton to Auburn) and Riesling Trail (Auburn to Clare), a bicycle and walking trail through the Clare Valley. In 1925, a broad gauge line was built from Salisbury to Redhill and in 1937, it was extended to Port Pirie to meet the extension of the standard gauge from Port Augusta. This line was converted to standard gauge in 1982, including a deviation at the northern end to move the rail junction from Port Pirie to Crystal Brook. Western Division narrow gauge lines The lines in the Mid North (generally north of Goyder's Line, which is the limit of 10" annual rainfall) were built to narrow gauge . Upper Yorke Peninsula lines The first narrow gauge line ran from Port Wakefield to Hoyleton, opened in 1870 and branched from Balaklava to Hamley Bridge in 1878, creating Australia's first break-of-gauge on the government railways. A horse-drawn tramway was built by the Kadina and Wallaroo Railway and Pier Company between Wallaroo and Kadina in 1862 and extended to Moonta in 1866. This was acquired by the South Australian Railways in 1877 and a new narrow gauge line was built along its route and connected to Port Wakefield in about 1878. A line was built from Brinkworth to Snowtown, Bute and Kadina in 1879. These lines were converted to broad gauge in 1927. All the lines west of the Adelaide–Crystal Brook standard gauge line and the line from Snowtown to Brinkworth were closed after the Adelaide – Crystal Brook line was opened in 1982, despite proposals to convert some of them to standard gauge. There are calls to convert the Wolseley to Mount Gambier line to standard gauge. This partly reflects the lifting of restriction on the road transportation of grain Australia-wide that followed recommendations of the 1986-88 Royal