Pervious pavement can be used for driveways, parking areas, sidewalks, road shoulders, boat ramps, and as part of decks or patios. Pervious pavement is thicker than traditional pavement; however, installation costs are lower resulting in an overall savings using pervious pavement. Pervious pavement requires no expansion to accommodate water moving through or across the pavement. This means that plants and weeds observed on traditionally-paved surfaces don’t occur in pervious pavement. Additionally, the light gray color associated with pervious concrete (one type of pervious pavement) reduces the amount of heat reflected from the paved surface on sunny days. On rainy days, pervious pavement reduces puddling and icing.
Pervious pavement is designed to allow polluted runoff to move through the paved surface into the soil surface below. Under typical rain conditions, 3 to 8 gallons of water per minute can move through each square foot of pervious pavement. Once water reaches the soil surface, the water is naturally filtered and pollutants are removed. Normal pavement forces water to run across its surface picking up sediment, nutrients, pesticides, herbicides and any other materials sitting on the pavement’s surface. Once this polluted runoff reaches the storm drain system, all of these pollutants are carried directly to the Blue River. By using pervious pavement, you can help keep the Blue River free from these pollutants.