This abandoned railway was operated by the Colorado and Southern Railroad, a subsidiary of the Chicgo Burlington and Quincy Railroad, and was a small segment on its mainline from Denver to Pueblo. A majority of the line was largely abandoned in the 1930s or 1940s when the C&S obtained trackage rights over the D&RGW/AT&SF Joint Line (see Palmer Lake to Crews). However, this segment between South Denver and Connors lasted much longer but it, too, is now abandoned.
The bridge at the location in the photo was removed in the early 2000s as part of an upgrade/widening of I-25 in the area.
Thanks to Mike Palmer for contributing information about this route.