Oroville Disaster May Have Been Caused by Weak Soil Under Spillway

Portions of Oroville Dam’s damaged spillway may have been built atop highly weathered rock, geologists say, a type vulnerable to erosion during the weeks of rain that led up to the disaster. THE DESTRUCTION OF Oroville Dam’s main spillway in February likely occurred because it was built on highly erodible rock, according to several experts interviewed … Read more