Strong, impenetrable concrete and grass crust buried approximately 25 cm, suspect to be pre-2/13 layer. New snow appeared to bond well to lower crust, but several spots showed potential for glide avalanche on weak oil and sand layer. Compression test (CTN) and extended column test (ECTX) both showed no fractures or propagation. No signs of instability were noted, so we dialed it up into advanced terrain. Dravus Couloir is definitely in, top to bottom. The backside provided amble coverage as well, allowing us to drop into the village for Apres. No whumphs were heard all day, only whoops and hollers.