18-Aug-2018 -- Taking advantage of a temporary break in the late summer smoke, my son and I decided to improve on the earlier confluence for 46N 119W which is only 20 miles or so from our house. This confluence lies on the west side of the Columbia river right where it flows south into Oregon State from Washington State. The challenge for this point is that it's right below some formidable cliffs that are hundreds of feet below the plateau. Ascending up from the river would require a boat and determination as well as crossing some railroad tracks.
Instead, we decided to use our drone and attack the point from the east side of the river. The drone records GPS as thus we were able to use a screen shot to confirm location. Luckily, the place that we found to launch the drone had a nice pull-out on a busy highway and an easy way to cross the railroad tracks on this side of the river. We encountered a local man taking his daily swim in the river who was quite skeptical of our ability to fly the drone all the way across the river and back. In fact this was easy largely, we believe, because of the relative freedom from electromagnetic interference in the area. (Very remote and no cell service -- I've never seen the reception this good.)
Both sides of the river had recently burned, which figures given the constant smoke we seem to have in the air these days. All in all this was by far the easiest of the dozen or so confluences that I've managed over the years.
Coordinator's Note: Although a novel approach and kudos for the ingenuity and use of their SUAS, according to the rules, this must be counted as an incomplete visit since they were not on the Earth's surface within 100 meters of the point.