I did a post a week or two ago, going into the length of our southern border and in fact our northern border (as somebody suggested we needed a wall there, also), the longest border between two countries spanning lakes, mountains, etc. I gave lengths (as I didn't know and had to look up) for southern, northern and the two coasts. You and I have both been military and were trained to breach, bypass or bull through, depending on mission situation, nature of obstacle, etc. We did it, just because somebody told us to. The people helping orchestrate, are doing it for profit motivation per head, or for drug trade logistics, whatever. Needless to say, where there is a will, there is a way and money to be made paves the way, and overcomes most obstacles. We are not going to be overwatching those lengths of border by fire, with order to shoot, even to shoot to discourage. So, the border wall thing is a bust. I can't count the times it has been tunneled successfully. Many sections reported as new border wall are actually old border wall, having to be taken down and replaced due to original engineering, weather, erosion, lack of maintenance and a variety of reasons, costing more big money. You know that Patton was right about fixed fortifications being a testament to the stupidity of man. Being Armor, not Airborn, you know I studied and revere Patton.
I doubt you really need the number and topography, and I don't feel like looking it up again, but be advised the only places they have put up wall are the relatively cheap flatter lands, closer to existing roads, not spanning mountains or canyons, not successfully dealing with rivers, streams, arroyos dry except during flash flood, that would also become areas of higher priced repetitive maintenance and reconstruction.
