Caltrans Drill Rig, Mill Creek
(Credit: Mark Reid, USGS/Menlo Park. Public domain.)
Detailed Description
Photo 6: Caltrans drill rig installing subsurface extensometers (to measure landslide movement) and pore-water pressure sensors (to measure ground-water conditions) in the Mill Creek landslide.
Details
Image Dimensions: 432 x 289
Date Taken:
Location Taken: US