A hundred or so years later, this catchment at the head of Arroyo Colorado on the Caja del Rio Plateau is still functional. It is actually made up of three catchment basins, but most of the water (here pictured) is in the central basin. The upper basin is presently a mud flat, and the lower (center right) is draining. Cows no longer roam down to the water’s edge but it serves wildlife well. There are also ancestral pueblo ruins nearby, and petroglyphs, so the damming you see here is relatively high-tech if not very original.