4. Soil cells
Soil cells are plastic milk crate-like structures, that contain specially blended soils, designed to be installed beneath sidewalks and roads. Once the soil cells are installed, you often can’t tell they are there. These soil cells have their own inlet and a perforated pipe where water is collected, allowing rain water to enter the soil cells to encourage plant root growth to help hold water during and after a rainfall.
The water is then filtered by the soil before going to the stormwater system. This process slows water from entering the stormwater system and helps mitigate localized flooding.