Dairy Road Bridge September 9, 2009
Trackside view looking towards Spring City, PA
Photo taken by Raymond Klein
BH Photo #153028
It looks to me that the girders were "attached" to the bridge as decorations.
One of the girders collapsed onto the trail below. Article from Pottstown Mercury from January 3, 2019
Since these pictures were taken, the virgin path that runs below the bridge has now been upgraded to a cinder surface and is now part of the Schuylkill River Trail. Historic landmarks on the trail are few and far between, but this is one.
I am pleased to see a category has been added for "turntable" bridges. I know there are other recycled turntables on this site and I find them to be a unique piece of history.