These maps cover Maricopa, Pinal, Pima and Cochise counties. The show known and previously reported earth fissures at a 1:250,000 scale suitable for planning purposes. The AZGS is currently working on higher resolution mapping of earth fissures that will be displayed on 1:24,000 scale. These detailed maps will be released as they are completed.
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Embankment Dams in Fissure Risk Zones
September 27, 2007
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Is it possible to safely rehabilitate dams in earth fissure risk zones to continue to provide economical flood protection to the public, or does the risk of dam failure due to an undetected fissure present too great a threat to the public? Read the article to find out the view of the Arizona Department of Water Resources.