Bridge at 38.388472, -104.619675
Looks old.
There are MILLIONS of miles of railroad tracks throughout North America. In many places the bridges/overpasses are in bad shape. That is why many old railway tracks are being abandoned. This is because the cost to repair them and bring them up to safety standards is more than that section of track brings in revenue in a five to ten year period.
For example, the Camas Prairie Railroad was purchased ten years ago for the SCRAP value of the iron rails. The company continued to run the railroad for another five years until the overpasses were so bad that the derailments were almost weekly. These derailments were happening even when the cars were only going 5-10 MPH.
Eventually, the government said either repair or abandon the line. They chose to abandon it. First thing they did was pull every piece of iron scrap out from Orofino, Idaho all the way down hill to Lewiston, Idaho.
What are the odds that the Google Maps satellite image shows us a mile long coal train on that overpass?