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How Good Are You At Predicting Floods?
Follow the Colorado River Controlled Flood onthe World Wide Web

Released: 3/22/1996

Contact Information:
U.S. Department of the Interior, U.S. Geological Survey
Office of Communication
119 National Center
Reston, VA 20192
Donovan Kelly 1-click interview
Phone: 703-648-4460



A controlled flood will be released on the Colorado River above the Grand Canyon on March 26. Can you predict how fast the flood crest will move downstream?

As part of the controlled flood release of the Colorado River on March 26 to April 2, U.S. Geological Survey gaging stations will be providing live flow information via the World Wide Web at http://wwwdaztcn.wr.usgs.gov or http://h2o.usgs.gov

How fast do think the flood crest will reach the USGS downstream gages? The ten best guesses -- in hours and minutes -- win a set of water posters and a certificate of recognition.

Here are the downstream gages and their distances below the Glen Canyon Dam:

USGS Gaging Stations Estimated Arrival of Flood Peak
Hours Minutes
Lees Ferry (15 miles)
Above Little Colorado River (77 miles)
Near Grand Canyon (103 miles)
Diamond Creek (240 miles)

Submit your entries by March 26: to U.S. Geological Survey, 375 South Euclid Ave., Tucson, AZ 85719. Or E-mail to: webmaster@wwwdaztcn.wr.usgs.gov.

Controlled flooding of the Colorado by releases from Glen Canyon Dam has been proposed as a way to manage sediment and other resources in the Grand Canyon. Because some effects of a clear water flood from Glen Canyon Dam are uncertain, the USGS, in cooperation with the Bureau of Reclamation and the National Park Service, have planned a short period of controlled flooding to provide information for science-based decision making.

As the Nation’s largest water resources information and science agency, the USGS measures quantity and quality of the country’s water resources at about 50,000 locations in all 50 states in cooperation with nearly 1,200 organizations.


The USGS serves the nation by providing reliable scientific information to describe and understand the Earth; minimize loss of life and property from natural disasters; manage water, biological, energy, and mineral resources; and enhance and protect our quality of life.

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