My understanding is that the beautiful trees took the overhead contact system down with them. If the positive feeders were aerial, they went down also. I regret that I haven't been there. For the record, the negative feeders are the running rails, as long as the bonds are undisturbed (ie not stolen).
Most of the St Charles line is in a very wide, grassed median called the "neutral ground". Between each pair of rails is a jogging path. Very popular. The cars run right-handed. I believe jogging is left handed. Residences on each side are well maintained, very old, high end.
Considering the local climate, I suspect that the ties, ballast, sub-grade and OTM are long overdue for replacement. Lets watch to see if the track is rebuilt while the line is down. The Spokane plant (now L B Foster, I believe) makes a "light rail" concrete tie that should be considered. I believe they were developed for Portland. Seattle's streetcar line along Alaskan Way also has them.
Many years may pass until the trees fill in the scene.