SS-ASr-D2-R3-O 5900 ft., southern Whitefish Range. Fractured on 4-5 cm thick fist hard layer of facets just above the early March atoms. river crust. ECTN29 at same layer near ridge at 6600 ft. Slab was more cohesive with more dense sfc. snow below 6k. Numerous (~10) collapses throughout the day at mid-elevations. Soft layer above crust easily identifiable with pole proving throughout the day.