The Green River Ordnance Plant, also known as the Green River Arsenal, was a large munitions factory complex between Dixon and Amboy in Lee County, Illinois.
It was rapidly constructed in 1942 and just as quickly shut down in 1945. Stewart-Warner Corporation operated the complex to produce rocket-propelled bazooka ammunition, artillery shells, naval shells, bombs, rifle grenades, fuses and rockets for use during World War II. http://www.epa.state.il.us/environmental-progress/v29/n1/green-river.html
It lies on the south side of U.S. Highway 30.
The plant is also known as the place where modern duct tape was invented by Vesta Stoudt https://www.jnj.com/our-heritage/vesta-stoudt-the-woman-who-invented-duct-tape#:~:text=The%20iconic%20tape%20was%20invented,Ordnance%20Plant%20near%20Amboy%2C%20Illinois.