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SCI Retreat 660 State Route 11 Hunlock Creek, PA 18621 (570) 735-8754 The State Correctional Institution at Retreat is located in Luzerne County, about 11 miles south of Wilkes-Barre, Pa., along the Susquehanna River and U.S. Route 11. It was opened in 1988 on the site of the Retreat State Hospital which...