From the record
“The York Subway is a set of historic bridges over U.S. It was constructed between 1938 and 1939 and consists of three concrete bridges carrying 14th and 15th Streets and the tracks of the Chicago, Burlington and Quincy Railroad over the highway.”
Wikipedia article York Subway, CC BY-SA 4.0.
One of 6 National Register listings published here for York County · listed in 1992 · category: Structure.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service
