In Chatham-Kent, the flat terrain and high water table create persistent drainage problems for any excavation or foundation. The region sits on glacial till over clay, with seasonal water levels rising several feet each spring. That is why geotechnical drainage design must start with a proper site investigation. Without it, water pressure builds up behind retaining walls and under slabs. We always begin by measuring soil permeability in the field. Then we run a laboratory permeability test to confirm the coefficient for design. For sites near the Thames River, we also recommend an infiltration study to understand how fast the ground absorbs rainfall. The goal is to keep water away from structures, not just collect it.
Clay soils in Chatham-Kent drain slowly; without proper design, hydrostatic pressure can crack basement walls and lift slabs.