The Central Permitting Facility Stormwater Best Management Practices were designed and constructed to reduce stormwater runoff and pollution. The facility is located on the watershed divide between the Bull Creek subwatershed and the Upper Des Plaines River watershed.
The plants and soil on the green roof absorb rainfall reducing runoff and pollutants from the roof surface. A special 8-inch deep planting mix is the base for a variety of small to large plants chosen because they adjust to large swings in temperature and are drought tolerant.
