Story courtesy of KSL.com
[Updated Thursday May 29, 2009 – 1:00 PM PDT] Added a photo of the AIS Kaiser S2 excavator (spider excavator), and added photos of the Devil’s Slide debris dump where they have put the landslide material removed and the material from the tunnel excavation. [/Update]
Grant Wilcox, Geology Branch Chief with CALTRANS Office of Geotechnical Design West gave a presentation on the Devil’s Slide repair along PCH Highway 1 at the Southwest Geotechnical Engineer’s Conference on May 12 in Phoenix. I’ve posted about the project here before. When I saw Mr. Wilcox, I knew he looked familiar but I couldn’t figure out why. At the beginning of his presentation he made light of his being on You-Tube…then it clicked! He gave a nice overview of the history of the failures, the geology, and the tunnel project. What follows are a few quick tidbits from his talk based on my notes. (Photo via Caltrans site).
Nearly 100 villagers living upstream from the Three Gorges dam have been forced to leave their homes under threat of a landslide, which officials fear was disturbed during the filling of the dam’s reservoir last year, Xinhua News Agency reported last week. Read on for more info. (Photo by enkai)
A 20 to 30-ft high retaining wall in a subdivision in San Antonio Texas failed on Sunday causing an evacuation of 80 homes. After an initial inspection, some 55 home-owners were allowed to return. The massive tension cracks that opened along the wall and behind it were 12-15-ft deep and 6-8-ft wide. Reportedly, the wall had problems even before the subdivision was even constructed. More after the break. (Photo by Jerry Lara – San Antonio Express-News)