New Westminster sits at the northern edge of the Fraser River delta, where the 1946 Vancouver Island earthquake registered Modified Mercalli intensity VI across the Lower Mainland, a reminder that our dense urban core rests on complex alluvial and glacial deposits. With the city climbing the steep slopes from the riverfront to the uptown plateau at roughly 155 meters above sea level, any deep cut, basement excavation, or retaining structure immediately contends with variable overburden and groundwater regimes. Our anchor design work tackles exactly this intersection of topography and seismicity—whether the project calls for a prestressed active anchor to limit movement behind a shoring wall on Columbia Street or a passive tendon embedded into the glacial till that underlies the Royal City Centre area. By integrating CPT testing profiles with the anchor bond length calculations, we refine the geotechnical model before the first strand is tensioned, avoiding the costly overdesign that generic assumptions often produce in this part of Metro Vancouver.
In New Westminster's hillside excavations, a properly designed active anchor limits lateral movement to under 10 millimeters, protecting adjacent century-old masonry structures from differential settlement.
