The bridges correct name is Charlestown Bridge. The rebuild projects name is North Washington Bridge!

Technically, Charlestown was a different city when this bridge was first built. Neither Boston or Charlestown city limits extended beyond their shore lines. As such the bridge never had the name North Washington St.
Now if you look at the Alford St bridge on the other side of C-Town it is a different story! This bridge was a toll bridge! And Charlestown city limits spanned into Everett! So unlike N Wash it is a continuation of a street!