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.
Geologic Hazards
Video: Helicopter Based Rock Scaling “Sledgehammer”
[Updated May 26, 2011] A new, cleaner, longer version of the video has surfaced on YouTube recently. You can see it embedded below. It includes some footage of attempts to "water bomb" the rock loose […]
Miscellaneous
Videos: gINT and Web GIS; Free On-Demand gINT eSeminars
You can claim that I’m biased because gINT is a sponsor of GeoPrac.net. But long before GeoPrac, I was a gINT user. I’ve been a fan and power user of the software for over 10 […]
Available Resources
Video: DeWind One-Pass Trenching Animation of a Collection Trench
,[Editor] From their video description: [/Editor]DeWind One-Pass Trenchers can install complete DEEP Groundwater Collection Trench Systems in a Single Pass Under the Groundwater Table! No Open Excavations-No Dewatering – No Pumping- No Treating discharge water- […]