The Pennsylvania State Correctional Institution at Graterford, also known variously as SCI Graterford (SCIG), Eastern Correctional Institution, Graterford Prison, Graterford Penitentiary, and the Graterford Prison Farm, is a Pennsylvania Department of Corrections prison located in Skippack Township, Montgomery County, Pennsylvania, United States, near Graterford. The prison, located on Graterford Road off of Pennsylvania Route 29, is about northwest of the city of Philadelphia. - Source: Wikipedia