It's daybreak and the sun rises just high enough over the CP Pig's Eye yard and shops to see a BNSF transfer crew picking up cars as they snake their way past the old roundhouse and shop building. That's the temporarily quiet Union Pacific Belt yard across the road on the right.
There are times when many engines, cars or cabooses are concentrated in a location. Such sites are for storage, economic reasons, active power needs or for rebuilding. For others, wear and tear have brought their usefulness to and end.