A friend showed me what remains of this wild horse capture corral. You can see people have destroyed this corral in hopes it won't be used again. the culling was called off in 2013 but it looks like it will go ahead in 2014.
Trappers build catch pens and bait the traps with hay and salt to lure the horses in. Once captured, the horses are herded into trailers and taken to the kill floors.