I remember when this bridge was still standing. We used to fish Bay Creek when I was younger, and I always liked going under it. From what I remember, it was a through truss bridge (based on pictures of other bridges I've seen on here), with large cut stone block abutments (with the rounded-face style of block), and the deck was gone. It was mostly intact at that time, only a portion of the deck frame had been removed for boaters when the water level was too high to go under the bridge normally. The last time I was there the bridge had been completely removed, including the cut stone, and the approach has been flattened to creek level for use as a boat ramp. The "newer" bridge doesn't have nearly the character, unfortunately... It's the common highway brige.
There is (was?) a similar bridge nearby, closer to Bay City, over Barren Creek which had been bypassed as well. I haven't been that way in years, so I can't say if it still exists or not.