United States. Army. Corps of Engineers. Chicago District

• Excerpts from Corps of Engineers' Upper Des Plaines River flood damage reduction study interim feasibility report and environmental impact statement, June 1999
• Wastewater management study for Chicago-South End of Lake Michigan area
• Flood plain information report on the Des Plaines River, Illinois and Wisconsin
• Flood plain information report on the Little Calumet River and tributaries, Illinois and Indiana
• Recent sediment accumulation in Lake George, Lake County, Hobart, Indiana