I saw this video on the ADOT Facebook Page. The failure seems larger than what I though based on the photos from the ground.
[Source: ADOT Facebook Page]
Project Related
Devil’s Slide Tunnel Update and First Attempts to Tame the Landslide
The Devil’s Slide Tunnel project is on schedule and on budget according to a news story at ABC7News.com from earlier in June. The video (shown after the break) has a few nice shots showing rock bolting, soil nailing at the portals, and the geologic mapping and laser scanning that happens at the tunnel face.
I also came across a very neat article about how the Ocean Shore Railroad Company was the first to try to cut into the slope along what is now PCH 1 at the Devil’s Slide back in the early 1900s. They were trying to connect the then rural farming community of Half-Moon Bay with San Francisco. The railroad fought the reoccurring landslide and serious rockfalls. Ocean Shore Railroad went bankrupt in 1922 and pulled up its rails, making room for the current highway. (Photo at left from halfmoonbaymemories.com)
Available Resources
Video: Fascinating Geotechnical News in 2016
Our colleagues over at Geoengineer.org put together a great video compiling some of the more interesting stories of 2016 for all of us geotechnical nerds. Check it out! [Source: Geoengineer.org YouTube Channel. Image: YouTube]
Geologic Hazards
California Geologic Survey publishes deep-seated landslide susceptibility map
The California Geologic Survey has published a new map of landslide susceptibility for the entire state of California. It addresses only deep-seated landslides, not shallow slides such as debris flows. The criteria used for developing […]