limestone but soon ran dry. For storage of rainwater, in 1860 a reservoir was constructed under the main courtyard. Water supplies continued to be inadequate until the 1878 construction of a pipeline to the Hope Valley Reservoir. A railway line and terminus, called the Stockade railway station, was opened on 1 June 1857 to service the facility and to aid with stone transportation. It remained in use until its closure and removal in 1961. The first significant expansion of the prison buildings occurred in 1858 with the construction of B Division. Built in the centre of the prison with 123 cells and, in the 19th century, designed to hold 300 prisoners. A new wing was added in 1872 with 36 cells, guard accommodation and a wall separating it from the rest of the prison, with 37 more cells added in 1878. By 1880 the accommodation was seen as insufficient for the 280 prisoners then held, with up to three per cell and eighteen per dormitory room. A T shaped building was constructed in 1884 with 96 cells over three floors, and the walled area expanded. The building included a chapel, offices and three dark underground cells used for solitary confinement. Known as A Division, it was built by prisoners at the jail as part of their enforced labour. 20th century Prisoners moved from rock breaking to goods production with trades including boot making, tailoring, tin smithing, blacksmithing, carpentry and masonry. There was public opposition as the free labour of prisoners was seen as unfair competition against private industry, consequently Government departments used most products. During the 1960s small industries were established north of the prison walls with facilities for spray painting, sheet metalwork and brick making. A decision was made in 1968 to build a new industries complex. Construction was from 1977 to 1982, with the complex opening in November 1984. C Division was created in 1957, as a minimum-security building, outside the main prison walls with a dining room added in 1967. B Division was redesigned and reequipped in 1958. The special education section of the education department opened a school at the prison in 1976 and Technical and Further Education began participating in prisoner education at Yatala from 1979. Although a high security prison, there have been some significant prisoner escapes. Four prisoners escaped in 1930, and lead the police on a car chase with whom they were