I find myself asking the question of why do I have to go to far flung places like Ohio and Indiana to see covered bridges when there are many rivers that snake around Michigan. You would think that combined with the amount of lumber in Michigan, there would be more of them.
Maybe the answer lies in the fact that many of these bridges were restored in the early 1980's. This might have corresponded with a resurgence of interest in covered bridges. It is possible that many of Michigan's covered bridges fell into disrepair well before that time. The other possible answer is that Michigan was making money hands over fists off it's timber trade and used other materials for its bridges. Still, it seems like there would be more of them.
So there you have the bridges. I think I'm going to have to head out that way at some point in the future.