I came across this interesting product for structural/geotechnical monitoring of cracks in 3 dimensions. Most crack monitors are designed for monitoring in 2 dimensions, this one can measure movement out of the plane of monitoring. I like that the markings are laser-etched so the simple device should last for a long time. Price is $40/each from Quality Plus Engineering, LLC.
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Video: Fun with Falling Rocks
Thank you to my old colleague at URS Corporation, Andy Messer for sending me a link to these videos. The are from an Austrian company, Trumer Schutzbauten, that provides products and research related to rockfall fences. The first video is presumably to show the hazards of camping next to hazardous rock slopes…good fun! Click through for the videos.
Video: Rockslide on Highway 96 in Northern California
Video: Freeport Maine Culvert Failure and Road Collapse
A colleague of mine sent me an amazing video of a culvert failure and subsequent road collapse in Freeport Maine during a storm. The culvert was unable to accommodate the high volume of water, and it was backing up behind the roadway embankment like a dam, and spilling out onto the roadway. In a span of about 3 minutes, the entire section of road collapsed and was washed downstream. I don’t know the exact date the video was taken, but it appears to be in August of 2008. Click through for the video.