On March 9, 2018 a “limited breach” of the tailings dam at the North Tailings Facility of the Cadia Mine tailings impoundment occurred in New South Wales, Australia. The area of the failure is approximately 270 m across, with a back-scarp of about 100 m. The runout was about 370 m. All things considered, it could have been worse. The mine owner, Newcrest Mining Limited, has ceased mining operations while they deal with the issue, and has begun radar monitoring. No additional movement had been detected as of last week. More information can be found in the briefing given to shareholders, and in the initial press release. Image: Newcrest Mining Limited
‘The Santa Clara Valley Water District has received preliminary findings from an ongoing seismic stability evaluation for Anderson Dam that detail part of the dam could experience “significant slumping” if a 7.25 magnitude earthquake were […]
The Mt. Soledad Landslide in a La Jolla California neighborhood destroyed 3 houses and damaged others and it also shut down Mt. Soledad Road for an entire year after it occurred in October of 2007. Residents blamed the city of San Diego, and 65 homeowners filed suit, claiming that leaking pipes caused the landslide and the City should cover damages.
Last week, a superior court judge ruled in favor of the City of San Diego. So far I have not seen anything indicating if the residents plan to appeal the ruling.
One interesting note regarding the trial, the City released an 8-minute cell phone video taken by a geotechnical engineer or drilling contractor employed by the City that showed the road cracking and buckling just prior to failure. The homeowners used the video to try to make their own case. Click through for a portion of the video and a link to the full one.