40 Foot Sinkhole in Tenn. Stadium Endzone

Geotechnical firm Treadwell and Rollo has performed the geotechnical investigation for the new San Francisco 49ers NFL Stadium to be constructed in Santa Clara, California. In addition to soil borings, CPT and seismic CPT tests […]

A colleague of mine (thanks Jamie!) sent me an email with this intriguing title. I have no idea where it originated, but it is an interesting compilation of some amazing photos and short descriptions of various natural and man-made "holes". A few sinkholes, glory holes, and of course open pit mines. By the way I didn’t write (or edit) this, just some minor formatting updates. Check it out. 

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A frightening moment was captured on video when a security guard in Shenzhen city, China was swallowed by a sinkhole. The video indicated that residents complained of vibrations or tremors from a nearby construction site […]