[Osage Orange]

Ever build a fence down the middle of a river?

[kinoxi]

Lintel it. I’ve done it. Rather extensive masonry/structural experience here. If the river is too wide it will act as a natural barrier leaving a wall across it unnecessary. The ‘virtual fence’ can take care of that IMO. Humans have been buildings structures across bodies of water for many thousands of years using the most archaic tools and techniques imaginable. I think the US government could manage to build a few. It doesn’t need to to be a wall across a river. The wall is a barrier. A fence delineating the sovereign border. Water can and has deterred just as effectively.