The ninth unit, completed in 2001, is the state's administrative control unit. The ACU is sometimes referred to as "Super-Seg" and houses the most violent offenders in an environment nearly completely free of physical contact with staff. Many of the offenders in the ACU have attempted to assault prison staff, or have engaged in a deadly assault on another inmate. Each cell is a self-contained living unit that includes sink, toilet, and shower. Each cell is accessed through two sets of doors, creating a sally port for each cell. Offenders are typically given access to an exercise room that is open to outside air for one hour each day.