Based on my previous blog, I would not worry about driving over the bridge. However, its aesthetics are incredibly bad.
I don’t remember much about the civil engineering module I took in my Statics class in college, but I do remember three things about bridges that indicate problems. I’m sure there are many more:
- A hollow sound when hitting foundation elements with a mallet;
- Movement (scrape marks) of any bridge supporting points against the foundation;
- Joint wear
I don’t think that concrete pitting is a good thing, but if the bridge has not moved off its foundation and the foundation is not rotting from within, then most likely the bridge is not in imminent danger of falling down.
My two cents: Rust and pitting, while really ugly, is generally not much of an impact on the superstructure as long as it’s not through and through. It’s like having ugly siding on your house.
Nonetheless, the photographs from the Cazenovia Street bridge make it appear that this structure needs some attention.