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The proposed mitigation is to shift the road alignment 60 feet and to use the rock from the cut to buttress the toe of the slide
Geologic Hazards

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July 30, 2013 rockman Geologic Hazards Comments Off on Geotechnical investigation and recommendations complete for US 89 Bitter Springs Landslide

The geotechnical investigations and report are complete for the US 89 Bitter Springs Landslide south of Page, Arizona. ADOT published a news release with the results of Kleinfelder’s geotechnical investigation and a link to their […]

cal_landslide_susceptibility
Geologic Hazards

California Geologic Survey publishes deep-seated landslide susceptibility map

May 23, 2011 rockman Geologic Hazards Comments Off on California Geologic Survey publishes deep-seated landslide susceptibility map

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Devil's slide repair of PCH 1 using
Geologic Hazards

Devil’s Slide Repair and Tunnel Bypass Presentation

May 28, 2009 rockman Geologic Hazards 1

Devil's slide repair of PCH 1 using [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).

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1 Comment

  1. Dear Sir,

    I would like to enquire about the landslide that happened on 15 feb 2010 in Italy ( maierato region).

    What are the soil types and what is the structural geology of the area. Any idea as to how could i get the maps?

    Thanks,

    jaithish

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