13' B.F. opening at Sta. "R" 163+53.5
Masonry arch bridge allows for drainage and access under the tracks for livestock.
Whyte steam powered auto with rail wheels is parked on the track above and to the right of the bridge. I.W.W. (International Workers of the World logo) is displayed on the top right side of the stonework. Location is probably between San Diego and San Ysidro as the range of the steam car is limited.
