Snowslide creek area obs

Did a couple runs just to the north of bacon rind, had good runs. Dug a pit and did an ECT test at about 8300 ft on a SE aspect, snow pack was about 4 ft deep. I got an ECT-P10 with a Q2 shear quality. My column failed and propagated on a thin barely visible strip of surface hoar in between the new and old snow, there was about 12 inches of new snow. Also noticed ‘many thin (appeared to be 4-5 inches)slab crowns, on steeper terrain right off the rode near the pulloff West facing aspect, also tons of the same shallow looking crown on the spur road up to big sky on the steep south facing stuff above the road.