In February of 2019 a rockslide on California SR-2, the Angeles Crest Highway, buried the road in 30 feet of rubble and closed the road indefinitely. Caltrans worked to clear the remaining landslide debris and reduce the hazards in the area. Part of the work involved using a spider excavator to excavate from the head of the landslide down. This is one of the best videos I’ve seen showing this unique piece of equipment in action. There is also a nice article about the project on The Drive.
Geotechnical Engineering Challenges of British Columbia’s Sea-to-Sky Highway, gateway to the 2010 Vancouver Olympic Games
I don’t know about you, but I’ve been enjoying watching the 2010 Olympic Winter games over the past few days. If you have, you know that Whistler is the venue for many of the sports including alpine skiing, luge, skeleton, bobsled, ski jumping, biathlon and cross-country skiing among others. The Whistler area is located about 50-miles or so North of Vancouver. In order to get to Whistler, you need to drive along Highway 99, better known as the Sea-to-Sky Highway. This highway has a long history of geotechnical problems, including some significant structurally controlled rockslides and landslides. In the years leading up to these Olympic Games a fair amount of work was done on the highway with some significant geotechnical innovations.
A 50-ton boulder caused severe damage to a La Crosse, Wisconsin home after a rockslide event near the appropriately named Cliffwood Lane. Residents in some adjacent houses were asked to evacuate as well. Click through for the news coverage of the rockslide. [Source and Image: WXOW. Hat tip to USGS]