On the BNSF main through town there is a spot close to a bike path that has something weird about the ballast. It caught my eye. At the center of the track the ballast is about level with the ties, but only for about a foot wide. From there the ballast tapers down so that under the rails the ballast is level with the bottom of the ties. This extends outside the rails for about a foot. Then, there is a windrow of ballast about 6” high parallel to the rails. This isn’t somewhere that has flowing water. What’s that about?
No- I don’t have pictures, sorry.