Pyrmont became a working class industrial and port community. A major sugar refinery was operated by CSR Limited. In 1900 the area had a population of around 30,000. The first Pyrmont Bridge opened in 1858. A larger bridge with a swinging span opened in 1902, but was closed to traffic in the 1980s. It was subsequently turned into a pedestrian precinct. In 1973, a public meeting held between residents of Pyrmont and Ultimo asked the Builders Labourers Federation imposed a green ban on the North Western Expressway to save much of the suburb.