Wagner's Confluence Adventure Page Beginning of this Confluence Adventure
Here is the Grand Canyon confluence. Grand!
To get here, it was necessary to park where you're not supposed to and hike in a couple miles through the forest to the canyon's edge. According to the GPS, the confluence turned out to be about three or four paces past the cliff's edge. It was a long drop.

I'm not that dedicated. Anyhow, given the military's Selective Availability policy, maybe the confluence is right at the edge.

On the way back to the road, I found an official Confluence Mandible:

I'm not sure it's actually a mandible. It won't matter if it isn't. It's still a Confluence Mandible.