Mississippi River bridge closing at Cairo

Although it's over the Mississippi  River, the bridge that connects Cairo to Missouri is one of my favorites, mainly because it is so narrow and so long. I don't necessarily like driving over it. Even in a normal-size car, I don't want to meet a tractor-trailer coming the other way. It's a lot like the Ohio River bridge between Cairo and Kentucky in that respect.

Anyway, the bridge will close for a year while crews repair and strengthen it. The work will cost $3 million.

I've wondered how much it would cost to replace the Ohio River bridge at Cairo, considering the width of the river. Or even if it would be replaced if the old one had to close.