I've been asked in the past for a map of the Arsenal. Well, it seems Google makes available it's satellite images as long as it's a "fair use." Finally an aerial view of the Main Manufacturing Area of the Radford Army Ammunition Plant - RAAP
From this link, pan out and go North...you'll see the Arsenal occupying the area known as the Horseshoe Bend.
And here's a nifty map of where the "receiving points" on the New River for the toxic particulate matter that falls from the Open Burning Ground: