The photos don't really show it that well. Maybe a horse could make it across on the left side, but that is a deep stream cut there. The left side is against the bank, and the stream bed ground between is very unstable rocks. The right is a couple hundred feet of air. I wouldn't even try my motorcycle there. If you lost it, it's a death ride to the bottom.
The culvert got washed out too, and pieces are laying down on the right, out of the photo. The gap is about two Jeep lengths wide.
That is how USFS road 4610 ends.