These doors were opened with a key, which was lowered on a rope from a guard in the tower above. After unlocking and entering the tower and locking the door, the key was returned on a rope that was lowered through a hole in the ceiling. Then the second key was lowered.

In 1969, the rope and the key system was replaced by an electronic system.

The trap door in the floor in the room closest to the street leads to a surveillance tunnel which provides access to gun ports that overlook the kitchen, shower area, dining hall, and provides the only access to the catwalk in the Cell House. In 2002 an access hole was cut into the tunnel. You will be able to enter the tunnel at stop #26.