Doesn't compare to the feedlots in El Paso which are easily 5x the size (or more), somewhat higher up from the river.
The west Texas wind was blowing from the south/southwest at 15-20 mph. There was no detectable odor, even west of Amarillo when we stopped for fuel. Hot too. 103 degrees fahrenheit. Plenty of room to dissipate I guess.
I was surprised however, by the amount of corn being grown. I don't remember seeing it just a few years ago. I could be wrong. It seemed out of place but was very healthy. 5-6 feet tall already.
> There was no detectable odor, even west of Amarillo when we stopped for fuel.
I've driven by the Wildorado feedlot dozens of times, and I always put my A/C on recirc 5 miles before and after. The stench still gets into the car. Conditions must have been very unusual during your trip.