Slow-draining clay makes the outlet as important as the drain
Weir’s dense prairie clay takes in heavy rain slowly. Instead of soaking down quickly, water stays at the surface or follows shallow low paths across the yard. Around a house, that runoff needs more than a short diversion: it needs a route that carries it away from the slab edge and does not send it into another low area.
Good yard drainage begins with where the water starts and where it can discharge. Roof runoff, surface water, the existing grade, and the outlet elevation all affect the plan. Depending on those paths, the work may involve surface drains, catch basins, or buried piping, but the drainage route has to work from inlet to outlet rather than simply move water a few feet.
Clay also shifts and settles. A buried line that loses its fall or develops a low spot holds sediment instead of carrying water through, and an inlet that cannot be maintained becomes less useful over time. We account for slope, outlet height, and access to the inlets when planning drainage work in Weir.