Still stuck in Yorkville, Illinois. In the last post I mentioned Cannonball Road being north of Yorkville off Il-47. It is actually Cannonball Trail. I did some research and found that there is also a subdivision in Yorkville called Cannonball Estates.
Evidently it was just the name a builder came up with as I can find no mention of a cannonball factory in Yorkville.
There is, however, a park named Cannonball Ridge Park at 2087 Northland Lane. The Yorkville Parks site says, "To keep up the theme of Cannonball Estates subdivision, the park has a Civil War theme with a Civil War-style fence, stone walls and prairie grass."