Geologic Hazards

Flooding in Supai Canyon

There have been a number of reports on the flooding in Supai Canyon, near the Grand Canyon this past weekend. I think the best description of the event and the subsequent rescues was from the AZ211 website which I found by way of the Arizona Geology Blog (quoted after the break). The flood was impressive. I hope the areas near Havassu Falls and Mooney Falls were not too heavily damaged. I was fortunate enough to hike and camp that location back in College, the travertine is just amazing and makes the water so green. Mooney Falls and the area downstream are particularly breathtaking. [Photo credit: National Parks Service]

Many reports I’ve seen attribute the flood the result of the failure of the Redlands Dam. But again, the Arizona Geology Blog quotes the National Park Service as saying that the dam is a minor one meant to create a pond for livestock and wasn’t a significant factor in the flooding. The latest reports I saw was that 11 hikers who were missing were located today (by way of


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Press Releases

NOAA, USGS Warning System to Help Protect Southern Californians from Debris Flows and Flash Floods

Released: 11/7/2007 1:18:29 PM

Contact Information:
U.S. Department of the Interior, U.S. Geological Survey
Office of Communication
119 National Center
Reston, VA 20192
Clarice Nassif Ransom &n=Clarice+Nassif+Ransom">1-click interview
Phone: 703-648-4299

Matt Ocana (NOAA)
Phone: 801-524-5692

Winter Rains on Burn Areas Could Spawn New Danger

NOAA logo A debris flow and flash flood warning system developed jointly by NOAA’s National Weather Service and the U.S. Geological Survey will help protect Southern Californians from potentially devastating debris flows-commonly known as mud slides- and flash floods in and around burn areas created by the recent wildfires.