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.
Last week was the annual American Council of Engineering Companies of Arizona Roads and Streets Conference in my home town of Tucson, Arizona. Its a transportation themed conference as you might guess, but there are usually a few geotechnical-type presentations. This year, there was an excellent presentation on the SR 87 Landslide that occurred about 1-year ago on the highway between Phoenix and Payson. The presentation was given by Keith Dhalen, PE with AECOM , Wayne Harrison, RG also with AECOM and Scott Neely, PE with Terracon . Read on for my recap of the presentation. (Photo by ADOT via AZGS)