When you excavate more than four meters in North Bay, you stop dealing with dirt and start dealing with a legacy of glaciation. The soil profile here is rarely uniform: compact silty till draped over fractured Precambrian rock, with pockets of soft varved clay from ancient Lake Barlow-Ojibway. Our team has spent years interpreting these transitions because the difference between a stable cut and a collapse often comes down to reading what the last ice age left behind. A deep excavation near Trout Lake behaves nothing like one in the Ferris area, and that local nuance is what drives our deep-excavations approach from day one. Many projects also benefit from a preliminary cpt-test to map soft clay lenses before shoring design begins.
In North Bay, the most dangerous assumption is that bedrock is a uniform floor. Fracture networks and dipping contacts turn every deep dig into a three-dimensional groundwater puzzle.
