I assume they trim off the smaller branches and haul them back to their pantry, but are they dragging them across the road, up the slope to the tracks and back down again? It looks like there is a culvert, so probably they use that, but the end looked like it had collapsed a bit. I saw a six foot length of birch floating that had to be four inches in diameter- that would be tough to drag.
Beavers are nocturnal, so I think I better be careful driving past here at 1 AM. If they get a work party going, it could look like the Ents are marching. Talk about an adrenaline rush!