Poor Soils

Poor soils are generally defined as soils that do not provide adequate infiltration. When working with these conditions, the design intent is to filter and slowly release stormwater via evapotranspiration, beneficial reuse, and/or discharge to a receiving storm sewer, waterway, or surface area over time. The following approaches are examples of how to achieve this:

• Pervious pavement with underdrain and outlet structure
• Lined/underdrained sand filter
• Lined/underdrained shallow bioretention system
• Structured bioretention manufactured treatment device (MTD)
• Grass swale
• Vegetated filter strip
• Cistern
• Wet pond
• Constructed wetland
• Subsurface gravel wetland