Patrol triggered 10+ in-bounds avalanches today through routine mitigation work. Most significant were the skiers left sides of Devo's and Sister's areas. Most surprising was a 30 ft wide 4-6 in deep slab below George's Rock. Large wind slabs formed the last 2 days and are very reactive. In uncontrolled terrain outside the resort we would expect to see these propagate wide and cut into deeper layers.