Confederate War Prison - Illinois The Alton prison opened in 1833 as the first Illinois State Penitentiary and was closed in 1860, when the last prisoners were moved to a new facility at Joliet. By late in 1861 an urgent need arose to relieve the overcrowding at 2 St. Louis prisons. On December 31, 1861, Major General Henry Halleck, Commander of the Department of the Missouri, ordered Lieutenant-Colonel James B. McPherson to Alton for an inspection of the closed penitentiary. Colonel McPherson reported that the prison could be made into a military prison and house up to 1,750 prisoners with improvements estimated to cost $2,415.