Hallo rweber95.
From what I can remember (I've lost my notes) a lot of the missing assets I put in to the Clinchfield route were Hog textures, so just put your own textures onto the terrain/ground for them. (whats available in Surveyor)
Also, I think most of the other missing assets were really nice buildings from here:
I suppose the best way is to download the whole lot of scenery items/assets from that site really.:'(
Good looking stuff (most of the East European stuff is) but a bit heavy on the frame rates.
Not too sure if the coal loading scenery assets are on the DLS.
Hope that helps.