An armed guard tower is situated by the main entrance to Millhaven. The entrance is used for visitors and staff alike and features airport type xray machines and metal detectors. Visitors are asked to leave all personal belongings in a locker before entering the grounds. Millhaven Institution
is a federal maximum security facility that opened in 1971 and it was originally intended to replace Kingston Penitentiary. In 1990, it was assigned a secondary role as a reception center for all maximum security prisoners sentenced to two years or more in the Ontario region. All new inmates will go
through Millhaven to be assessed for a period of 6-7 months before being transferred to other facilities. There are 130-150 inmates that are permanently housed there and about 330 “temporary” inmates.