The IAIS Illinois Division runs from Blue Island (Chicago) to Silvis and Peoria with the center of operations in Bureau.  The BUSW or Bureau Rocket does the industrial switching with several trains running over the line.  The CSX will also start at Blue Island and center its base in Ottawa when that part is finished.  CSX locals work Utica and Marseilles.  The Illinois Railway starts at Eola and works Wedron Silica.  All this is built under an existing HO layout.