Did you guys not have to go through an unexploded ordinance training? The company I worked for did a good sized road job in Anniston, AL, and quite a bit of the job went right smack-dab through the middle of the old Army base/weapons depot/whatever it was. Everyone on the job had to go through training before they could dig, as I recall.
Here are a few pics, but I couldn't find any real good ones with a bunch of iron in them.
That's a box culvert waaayyyyy down there in the bottom, and I'm on top of the cut taking the picture. The majority of the job is behind me and will be in the next picture.
I think the Talladega track is somewhere in the background of this one...