WPA bridges start with 5

W.P.A. Project G5-2-97, 1936

And again

Bridge 5, all photos by Carol Tornow

As you approach bridge five, look for the WPA plaque on the right 'post'. If you examine it, you'll see the project designation, the first number of which is 5. This is your clue that you are on bridge five. I realize that the WPA project designation is the same for bridges 5 and up, but you aren't going to look for any more WPA plaques on the bridges. (Well, you can look for them, but they aren't your helpful hints.)