Thanks to "anonymous" who posted a comment to my earlier blog with a link to TopoQuest.com for the location of the Redlands dam [right] in the Little Harpo Canyon quadrangle, upstream (south) of Cataract Canyon. The dam was erroneously identified by local authorities as the cause of the flooding that hit the village of Supai in the Grand Canyon, early Sunday morning but corrected the next day.
The Redlands Ranch area is in the center of the lower map, showing its location relative to Cataract Canyon, the prominent drainage in the upper center of the map.
This event's attracting a lot of attention. My posts have had four times as many hits as anything else I've ever put online.