This is the FEC bridge over the St Lucie River just north of downtown Stuart. It is taken from the north shore between the tressel and the old Roosevelt drawbridge. The new fixed Roosevelt bridge is in the background.
I have been wanting to get a video of a train crossing the bridge but always miss. I found one on YouTube taken by someone else. Upstream is to the right and divides into the North and South Forks of the St. Lucie just past the old bridge.