As your photo bears a resemblance to the mighty Colorado River, which was diverted for the construction of both the Hoover dam and the recent bypass bridge, it appears it could be done. I’ll qualify that by stating I’m no expert on this. If feasible, it’s just a matter of how important one considers a fence to be in combating illegal immigration.
There has been some fence built in Texas by the feds, and it put eight US houses on the wrong side.
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The Homeland Security Department last year put up a tall steel barrier across the fields from Taylor’s home. The government calls it the border fence, but it was erected about a quarter-mile north of the Rio Grande, leaving Taylor’s home between the fence and the river. Her two acres now lie on a strip of land that isn’t Mexico but doesn’t really seem like the United States either.
The government doesn’t keep count, but Taylor and other residents think there are about eight houses stranded on the other side of the fence.
“It’s a no man’s land,” Taylor said. “They said they were going to build a fence to protect all the people. We were just lost in the draw.”
When the Homeland Security Department began its Southwest border buildup four years ago, erecting barriers seemed a straightforward enough proposition. The international boundary is ruler-straight for hundreds of miles from California to New Mexico, and planners laid the fencing down right on the border, traversing deserts, mountains and valleys.
But here, where the border’s eastern edge meets the Gulf of Mexico, the urgency of national security met headlong with geographical reality. The Rio Grande twists through Brownsville and surrounding areas, and planners had to avoid building on the flood plain. So the barriers in some places went up more than a mile from the river.
http://articles.latimes.com/2011/feb/28/nation/la-na-texas-fence-20110228