When the South African apartheid government passed the Group Areas Act of 1950, the Bloemfontein municipality put into effect changes in the racial set-up of the city. The municipality demolished the Cape Stands residential area which was occupied by the city's coloured population and moved the residents to Heidedal. However, due to Coloureds living in such close proximity with black people; intermarriages across racial lines occurred, resulting in a partial mixed population in Heidedal and Mangaung. In 1952 the Bloemfontein municipality began building new residential areas for the city's black population. New residential areas to separate ethnic groups such as Sotho, Xhosa and Tswana were formed. The residential areas were jointly known as Mangaung. Phahameng, a Sotho township, was the first formal housing projects to be approved by the municipality in 1956. Physical buffers such as the railway line and roads were put into place to separate black ethnic groups, the white and coloured population.11 000 housing structures, of which approximately 6 000 were government built rental accommodation, were erected in Mangaung between 1952- 1968.