Photo courtesy of the Reading Railroad Historical Society; Used under Fair Use as a historical resource
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BH Photo #458886
It isn't. Most of the bridge was filled in and the remaining arch widened with concrete at a later date.
The other bridge is of a similar "pierced spandrel" design, but the design was standard at one point on the Reading:
Thanks Luke for finding the bridge.Didn't know the Gibralter Road Overpass was the bridge I was talking about.
"Quinter's Bridge, along Gibraltar Road between Suckertown and Gibraltar Village.This bridge was built between 1847 and 1848. Today, all that is in use is arch #2. The rest have been underfilled."
One NS Arch