Geography of Sheffield (Totley Brook passes south of Totley and meets Old Hay Brook at Needham's Dyke). The Sheaf flows northwards to join the River Don near Blonk Street Bridge in the city centre. This lower section of the River Sheaf together with the River Don, between the present Blonk Street and Lady's Bridge, formed part of the perimeter of Sheffield Castle. Porter Brook's source is just inside the Peak District National Park, to the west of the city, at Clough Hollow, also near Ringinglow. From here it flows eastward to meet the Sheaf, at a point now located underneath Sheffield Midland Station.
Sheffield City Council elections Sheffield City Council elections Sheffield City Council elections usually take place by thirds, three years out of every four. Each of Sheffield's 28 wards is represented by three positions on the council, meaning there are usually 28 seats contested in each local election. 2004 saw new ward boundaries and therefore all seats were contested. Before 1974, elections were by thirds annually for a three-year term, with Aldermen elected from the body of councillors every three years. In 1974, Aldermen were abolished, and elections to Sheffield City Council are by thirds, in three years of every four, for a four-year term.