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.
Phoenix Arizona’s PBS affiliate, KAET-TV, Channel 8 had a segment on Earth Fissures on their May 30th episode of "Horizons". They interviewed one resident of the Chandler Heights area that has problems with earth fissures on her property. They also interviewed Todd Shippman with the AZGS in the field. Todd is the project manager for the AZGS’ earth fissure mapping program. The bulk of the program was an interview with Lee Allison, the head of the AZGS and the Arizona State Geologist. He explains the earth fissure mapping program, and the planning scale maps that were just released this week on the AZGS Website. Click through for embedded video of the segment from the Horizon Website. You can also download it as a podcast if you wish. (Photo courtesy of NCS Consultants, LLC.)
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.