Swales are shallow, open, parabolic graded drainage ditches that are engineered to collect and divert surface water from your landscape. Swales are usually filled with flood-tolerant, erosion-resistant plants, crushed rock or gravel. Seattle Rockeries builds swales to accommodate Seattle weather including rain and stormwater.
Swales act as filters that control the drainage of stormwater to filter pollutants from entering local water systems. Check-dams can be used to filter debris and sediment. Water collected in a swale should be expected to drain away through the soil within several hours or days. Seattle Rockeries builds redundant swells with overflow protection measures to protect your property.