Sheffield Tramway was an extensive tramway network serving the English city of Sheffield and its suburbs. The first tramway line, horse-drawn, opened in 1873 between Lady's Bridge and Attercliffe, subsequently extended to Brightside and Tinsley. Routes were built to Heeley, where a tram depot was built, Nether Edge and Hillsborough. In 1899, the first electric tram ran between Nether Edge and Tinsley, and by 1902 all the routes were electrified. As of 1910 the network covered 39 miles (62.7 km) and as of 1951 48 miles (77.2 km).