 IMS has extremely controlled movement where as the Violator unit is treated as Minimum to medium security where violators can move in their respective day rooms with no officers present in the day room, IMS is one of the administrative segregations for the facility.The Washington State Reformatory opened in 1910, making it the second oldest operational prison in Washington state, behind the Washington State Penitentiary.The next facility opened was the Special Offender Unit in 1980.