Photograph of N and O Streets grade separation over Santa Fe Railroad tracks, October 1936. In the foreground at right, muddy ground marked with tire tracks can be seen. A line of utility poles extends into the background at center. To the left, a set of metal railroad tracks can also be seen extending into the far background. In the extreme background, a large bridge can be seen extending over the tracks. Large cylindrical columns can be seen supporting the bridge. At left, a large metallic structure is visible.