AFAIK it's been available since the 1870s but after the 20s they clamped down a lot harder on ensuring you were actually irrigating it and had agricultural plan

AFAIK it's been available since the 1870s but after the 20s they clamped down a lot harder on ensuring you were actually irrigating it and had agricultural plans. I'm not sure if the BLM has relaxed their discretion under Trump.