Illinois taxpayers will spend $812,000 on a roof-replacement project at a 135-year-old southern Illinois prison.  Governor Pat Quinn says Joiner Sheet Metal and Roofing of Greenville was the lowest of two bidders.  The project will replace roughly 40,000 square feet of the roof at the maximum-security Menard Correctional Center near Chester, southeast of Saint Louis.  The Illinois Capital Development Board will oversee the project involving the 1920s-era North and South cell houses.  Republican state Senator David Luechtefeld of Okawville calls the work a much-needed upgrade that will add some safety improvements for the prison’s roughly 3,700 inmates.