and reaching Wollongong in 1887 and Bomaderry, near Nowra in 1893. A branch line was built from Sydenham to Belmore in 1895, Bankstown in 1909 and Regents Park in 1928, which became part of the Bankstown Line of the Sydney Trains transport network. Main North line The first section of the Main North line was built in the Hunter Region by the New South Wales Government Railways in 1857. It was extended north to Wallangarra in various stages, reaching the Queensland border and connecting with Queensland Railway's line to Brisbane at a break-of-gauge in 1888. The final section between Strathfield and Newcastle was completed by the opening of the Hawkesbury River bridge in 1889. North Coast line The North Coast railway line was built between 1905 and 1932, and when completed, bypassed the Main North line and provided a quicker route up the eastern seaboard. The first part of the North Coast line was built between Casino and Grafton in 1905, as an extension of a line from Murwillumbah. It was extended from Casino to Kyogle in 1910 and South Brisbane in 1930. The section from Maitland junction to South Grafton was opened progressively between 1911 and 1922. The Clarence River at Grafton was the most difficult river to cross, and was the last section to be opened in 1932, upon completion of the Grafton Bridge. Private railways A number of private lines were built to connect the South Maitland coalfields (discovered in 1886) with the Great Northern Railway at East Greta Junction near Maitland. By 1918 most of these had been merged into the South Maitland Railway. A narrow gauge railway was built by South Australian Railways from Port Pirie to Broken Hill, in 1888 to serve its silver and lead mine, which was becoming the largest and richest of its kind in the world. Since the New South Wales Government would not allow the South Australia Railways to cross the border, the last was built by a private company as a tramway, the Silverton Tramway from Cockburn to Broken Hill. In 1970 the line was replaced by a standard gauge South Australia government line, completing the standard transcontinental gauge line from Sydney to Perth. The Byron Bay Train is a passenger service in Byron Bay using a 620 class railcar converted for solar operation. A number of other private railways have been built in New South Wales to