Recently drove from Colorado back to attend a wedding near Fort Madison, IA. Located right next to the highway (about 6-8 feet from the roadway) in downtown Fort Madison are two cannon that I have admired since I was about 7 years old (about 1943). You can plainly see the old reflector imbedded in the concrete base on the one cannon due to the proximity to the highway. One picture will show some very substantial hardward holding the trunion to the concrete base.
Here's the stone monument standing between these two cannon. You can plainly see the RR tracks of the BNSF Rwy and the Mississippi to the right side of the photo
And here's the plate on the monument
About one block away to the West, there are two James cannon and here's three pictures of them
And this one is aimed across the Mighty Mississippi River.
If these pictures were already posted by CW (Tim) on his trip back West of a few years ago, I must apologize for reposting them..
Oh yeah, also sorry for not having a one pound BP can in these pictures. Next time for sure!
Blaster (Bob in So. CO)