I have updated the Silverton Railroad map with a few photos that I took while hiking the lower part of the grade. If you hold your pointer over any of the yellow markers the photo should pop up. The photos are rather large so they may be clipped at the edge of your screen. This can be fixed by scrolling the map so that the marker you are looking at is close to the upper left corner of your screen.
I have also tried to sketch in the loop up at Chattanooga. I can't say that it is 100% correct but it should be fairly close. I didn't actually hike this portion but I have someone providing a few photos. I'll try to get these added soon.
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d.dye.home.att.net]