Gopher Ordnance Works - Credit: Wikimedia Commons
Gopher Ordnance Works was a smokeless powder production plant near Coates and Rosemount, Minnesota, United States. It was first opened in 1943. The plant was closed soon after the end of World War II. There are some remains still at the original site which is visible from U.S. Route 52 and County Road 46. Read more on Wikipedia
Source: en.wikipedia.org