I think they did the proper thing.. It was a construction site and lot of the times if you find 1 cannonball there is bound to be more somewhere on the construction site. Hitting any artillery shell with a piece of heavy equipment would probably not be good. And the guys running the construction site probably had no idea what to do and probably even had no knowledge it was a civil war projectile! so whose to call?? As you know there are enough Civil War artillery projectiles out and about so it is not a huge historical find.
Also to Sharecropper.... I too have heard of this story about a relic hunter in Virginia who got blown up digging a cannonball ?? out of the ground. I heard it was a post civil war cannonball? but i do not know. I think CannonBallGuy one of are members here who has written books on civil war projectiles and is mentioned in many artifact books, would be the one to ask about that...
The story about the virginia digger may not even be true!! I have never heard, that I know of a digger getting killed while digging a civil war projectile? but i have heard of people getting killed digging post cw and ww1 and ww2 artifacts! in like old training camps and such. I also know of a handful of cases of someone who got blown up or hurt really bad trying to drill into a cannonball. The old-timers who have been dealing with cw projectiles for awhile, have told me that if you defuse 300 cannonballs, out of that 300 there will be 1 or maybe 2 that will blow up.
And that is what happen to Sam White who got killed defusing a cannonball at his home near Richmond,Virginia!! that most diggers know about that happen fairly recently. He would defuse civil war projectiles in his garage by drilling into them and I was told by someone who knew him that he was on his like 400+ projectile defusing project? so i assume that would be like 20 or so years of defusing projects then that 1 got him. I think Civil War artillery shells are very safe to handle you can hit the shells a million times with a shovel and they wont go off ! it is only when you drill into it or hit it with a piece of heavy equipment.. now with cannonballs they tend to scare me more than a shell. I have dug 1 cannonball before and i just left it there because i had a bad feeling about it and I didn't know if it was a post war one or not. If it was not a cannonball but say was say a civil war dyer shell, i would have no issues or worries in removing it from the ground but then would have to find someone to defuse it for you.