Why do manhole covers and storm drains have a year stamped on them?

Question

A lot of manhole covers and storm drains have a year stamped onto them. I’ve always wondered why but I couldnt find info online.

In: Engineering

Answer 1

I’m assuming it’s just the casting date. It gives a lot of info about the component itself, its composition, where it was made, when it was installed, its design, etc.