Millhaven also housed the federal inmate intake and assessment unit for the Ontario region (Millhaven Assessment Unit or MAU until 2013 when the assessment unit was moved to Joyceville High Medium Institute (JAU) in order to facilitate the closing of Kingston Pen). Federal parole violators were returned to MAU (from whatever Ontario region they were arrested) to appear in front of the National Parole Board for disposition. Millhaven is one of two identically designed maximum security institutions in Canada. The other is located at Archambault Institution, Sainte-Anne-des-Plaines, Quebec.