There isn't much to say about this mark. Like many other PennDOT and PDH marks, we found it simply by checking out, on a hunch, an old bridge we happened to be passing over. It is unstamped and in good condition. We found it on a bridge over Marsh Creek along Graveyard Hill Road (great name, especially appropriate for the day before Halloween). We were our way to 37 B (now that was quite a story!). On the side of the bridge facing the road is a PDH bridge plaque giving the date of construction as 1961.