I was going to ask what the point of gunning it into the water might be. Rip off as many plastic body panels as you can?Low water crossings (as they are called here) are fairly common on dirt roads in rural hilly areas. I've crossed many of them over the years in trucks, but the trick is to slow down. These folks are going a bit too fast.
Edit: Was pretty easy to find the spot too: https://goo.gl/maps/zFmFK5iU7P4SPDP37