In going through Don Ball Jr.'s excellent book on the Pennsylvania Railroad in the 1940s and '50s I saw this neat photo of a T1 pounding the mainline, I think in Indiana, and instead of the usual stone ballasted roadbed it looked like brick or a type of masonry work. Can anyone tell me more about that? It looked like a neat change from typical railroad roadbeds.
It definitely wasn’t on any bridge! The photos were taken in Hanna Indiana where the Davis track-troughs are located, and the mainline looks real flat and straight (I guess part of the Fort Wayne race-track). There on pages 180-181 in the book.