Surrey sits on a complex mix of glacial till, marine clay, and alluvial deposits. Every heavy rain season we see small slips on the bluffs overlooking the Nicomekl River. A proper slope stability analysis is not just a permit requirement—it is the only way to know if your cut or fill will hold up over time. Our team runs limit equilibrium models using site-specific soil parameters from Surrey’s varied geology. We avoid generic assumptions. For deep-seated failures in the upland areas, we often recommend combining this with a stone columns investigation when weak compressible layers are found at depth. The analysis defines the factor of safety for static and seismic conditions, giving you a clear picture of what reinforcement or drainage is needed.
In Surrey’s transitional geology, relying on a single shear strength value is a dangerous oversimplification.
