Sorry I can't post the photos in Dorman's book. The trestle is a ramp with a very steep grade that goes into a building shed at the top. The coal is dumped out of the gons, or cattle cars into a bunker, which has side doors on both sides and side slope sheet which are used to coal engine tenders on either side. Dorman names the structure a coaling trestle. There is no conveyor in this structure. The coal is dropped or shoveled out of the cars into the coal bunker, where it drops into the tenders. There is a short tail track beyond the shed at the top, which has even a much steeper grade at its end to help prevent a over run of the stopping location.