Large explosive triggered slide at Y.C.

From YCSP: "Today the YC Ski Patrol conducted avalanche mitigation work above one of our roads. The area is outside of our ski area boundary and receives no skier traffic. A 2lb explosives charge was detonated from an aerial tram and triggered a R4/D3 avalanche that ran to the ground on depth hoar . The crown was 4', The max path width was around 250', and it ran 350 vertical feet to the bottom of the runout zone . The elevation was 8400' on a ENE a aspect and max slope angle of 36 degrees. Two sections of road, which were controlled for traffic, were buried with an estimated 15-20 feet deep deposition pile. We’ve seen this path go big in the Spring, but we can’t recall it ever going quite this big."