We see it too often. A contractor cuts a slope too steep during a basement dig in the clay soils near the Red River, and the next rainstorm turns the site into a mess. In Fargo, the Sherack Formation clays can lose significant strength when saturated. A slope stability analysis is not just a report to file away. It defines safe cut angles, berm setbacks, and groundwater control measures before the first bucket of soil is removed. For embankments along the diversion channel or roadway approaches over soft ground, we pair the analysis with an in-situ permeability study to understand how pore-water pressure builds up during spring melt. Without this data, you are guessing on safety factors that should never be guessed.
The critical failure surface in Fargo is rarely a textbook circle. It usually follows a slickensided plane in the Sherack clay.
