Around St. Catharines, the ground doesn't read the textbook. You get stiff Halton Till sitting over soft glaciolacustrine silts, then the Queenston shale somewhere underneath. A standard borehole log can miss that thin drainage layer that changes your footing design completely. That's why we lean on CPT here. The cone gives you a continuous vertical profile — tip resistance, sleeve friction, pore pressure — all in one push. You see the transition zones in real time, not just at 1.5-metre intervals. For a city sitting right on the Niagara Escarpment slope, knowing exactly where the weak seam sits matters more than people realize. We run the rig, you get the qc plot, and the stratigraphy actually makes sense.
CPT captures a soil transition at 2 cm resolution — a borehole log might miss it entirely.
