The Riverbend Maximum Security Institution (RMSI) is a prison in Nashville, Tennessee, operated by the Tennessee Department of Correction. The prison opened in 1989 and replaced its 100 year-old neighbor, the Tennessee State Penitentiary. RMSI, which is made up by 20 different buildings, sits on 132 acres (0.53 km²) located off Cockrill Bend Boulevard in Nashville, TN. Riverbend's designated capacity is 714 offenders.