I stepped on something in my sister's yard when I was visiting a few years ago. Went clean through the bottom of my flip flops and punctured my foot. I talked to a local doc about coming in for a tetanus shot, and he said it would be better just to go to the County Health Dept. since they had all the tetanus vaccine in the area! Cost me $10, and I'm good for another several years!
Since you're fooling with all that metal that's been sitting exposed for so long, it would be a good idea to go ahead and get one. Call the Health Dept. It won't take too long or be too expensive.
Health department!!! Good idea!
I promise I'll do it today. I'll get a picture for the blog, even.