
Our weakest layer throughout southwest Montana is the layer of facets buried 6-16 inches deep. These broke during my Extended Column Tests (ECTP 16). On the surface, new facets are forming creating a future problem. Photo: GNFAC
Our weakest layer throughout southwest Montana is the layer of facets buried 6-16 inches deep. These broke during my Extended Column Tests (ECTP 16). On the surface, new facets are forming creating a future problem. Photo: GNFAC