Cross section through Bitter Spring landslide complex

We've heard a couple of reports that yesterday's landslide on US89 near Bitter Spring, was making noises throughout the day, raising questions whether it is still moving.

Phil Pearthree, chief of the AZGS Environmental Geology section, put together this cross section through the entire escarpment that shows the slide, just to the left of the 1710 m marker, showing that there is a substantial bench downslope that, along with the distance involved, would likely prevent any materials from making it all the way down the mountain and impacting US89A (solid line running N-S on the left side of the image).