An arena being built for the Philadelphia Flyers’ minor league affiliate hockey team will be founded on micropiles to mitigate possible sinkhole problems in the limestone bedrock. The arena in located at the site of a catastrophic collapse of a building, Corporate Plaza, in 1994. The collapse was blamed on sinkholes under the foundation that caused settlement and the rupture of a water main, flooding the area and exacerbating the issue. The building eventually had to be demolished. [Source: Morning Call via AGC SmartBrief. Image: CHUCK ZOVKO, The Morning Call]
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40 Foot Sinkhole in Tenn. Stadium Endzone
A large 40 foot wide by 40 foot deep sinkhole opened up just outside the endzone of Austin Peay State University’s Governors Stadium in Tennessee. The stadium is currently undergoing upgrades for next year’s football season. Sinkholes are not unexpected on Austin Peay campus, and the video below shows one example of how the University has actually incorporated the remediated sinkholes into the landscaping. Representatives from the University and the contractor expect the sinkhole will be filled without any problems.
[Updated 1/19/2015] Click through for the video since I can’t figure out how to turn off the auto-play on this one. [/Updated]