With over 100 member firms from both northern and southern California, CGEA is California’s premier organization for geotechnical firms.
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Images of Natural Hazards from NGDC Marine Geology & Geophysics Division
A collection of geologic hazard photos from the NOAA National Geophysical Data Center (NGDC). Many of these photos were originally 35mm slide sets made available to educators and others. Now you can download them. Only […]

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Foundations and Geotechnical Engineering for the Burj Dubai – World’s Tallest Building
The Burj Dubai Tower has recently reached it’s final height of 818m (2,684-ft or almost exactly 1/2 a mile!). The foundation system for the Burj Dubai is comprised of 192 bored piles (drilled shafts in my practice) 1.5-m (approximately 5-ft) in diameter and approximately 50-m deep (164-ft). A 3.7-m (12-ft) thick raft foundation sits on top of the piles under the full footprint of the structure. (Image from BurjDubaiSkyscraper.com)
The geotechnical investigation for the Burj Dubai (now to be known as Burj Khalifa after the UAE President) is described in detail in a paper by the geotechnical engineer of record, Grahame Bunce of Hyder Consulting (UK) and the independent technical reviewer for the geotechnical design, Harry G. Poulos of Coffey Geotechnics. Click through for the link to the paper and more details. […]