A few counties in Michigan (St. Joseph comes to mind) still builds wooden bridges of similar design today.
A regional thing I guess. Here in the land of politicians and concrete companies owned by the same shadowy figures, it's strange to see any other material used if concrete can do the job.
This bridge construction type was actually (and may still be) quite common in various areas of Minnesota as recently as the '90's. The bridge behind the link below was replaced with this exact bridge type in 1988. The bridge deck and the bents are identical to this one and is overlaid in asphalt.
Nothing brilliant but certainly unusual to see this construction recently.
This bridge was built in 1979 according to the NBI - so it is not very historic yet. But because I found it interesting, maybe others will too.