Nathan, very cool!
PennDOT is working to develop a historic truss bridge management plan and these bridges are part of it. I am hopeful that this management plan will be a foundation toward an effort of preserving these bridges. I was previously unaware that all of these bridges (aside from Walp Road which I knew about) were Phoenix bridges. So I added a photo for each from the report, mainly for the benefit of myself and others who may wish to prioritize visiting these bridges above other bridges in the area.
I have no doubt that many of the dates given are incorrect. I would assume all to be pre-1900.
Adding six (6) still extant Phoenix Column bridges to this database in one day is quite a feat! Is there a back story?