It is a Government of Ontario-operated maximum-security correctional facility for adult male inmates serving a sentence of up to 2-years-less-a-day, and offenders who have been remanded into custody while awaiting trial.

[2] The facility consists of two parts; A maximum-security building that can house up to 1,650 remanded accused awaiting trial, and a medium-security building, known as the Toronto Intermittent Centre (TIC) that can house up to 320 inmates serving primarily weekend or other intermittent sentences.

The maximum-security building is the first in Ontario to be constructed from prefabricated concrete cells that can be stacked with a minimal support structure.

[3][4][5] Designed by Zeidler Partnership Architects, the modular cell units were built and shipped from Tindall Corporation facility in Atlanta, Georgia.

[8] The facility's mental health assessment unit did not become operational until after two inmates died in custody in February 2015, one by suicide and another due to a drug overdose.