In 1978, ownership and control of the line shifted from the State Government controlled State Transport Authority (STA) to the Federal Government controlled Australian National (AN). However the STA continued to operate local passenger trains over the route. The station and goods yards at Port Dock closed in 1981 and the original route into Port Adelaide through the Gillman marshalling yards closed when the Gillman yards were removed in the early 1990s. In 1988, the old Port Dock became the site of the National Railway Museum and is still connected to the Adelaide Metro network, although rarely sees any use.