It looks like the approach in the tough twisted river flood plain, will be to back off the barrier a few hundred yards to a mile from the current river bank. That will allow a straighter barrier, easier to monitor and patrol, with a large enforcement zone. That requires buying/condemning the land, but once it is done, is is a powerful long term control measure.
Interesting—thanks!
Ska-rew that!
They should build the wall on the other side and annex the land from Mexico. If they don't like it, they can take it up with the USAF.
Let the border-front ranchers keep their land, and have the water. Mexico deserves to be punished for their part in our problem.