Stormwater Management Techniques in Use at EPA Headquarters
In This Section
The stormwater management techniques employed in EPA’s Headquarters Low Impact Development (LID) projects include several best management practices such as: bioretention cells, cisterns, permeable pavement, permeable pavers, and soil amendments.
Several other LID techniques are in use at EPA Headquarters:
High Density Plastic Grid: This is a flat grid made of high density plastic that is used to reduce soil compaction and maintain infiltration in lawns subject to vehicle traffic. This permits traffic to cross the area and still allow water to infiltrate into the grass.
High-Efficiency Irrigation: Irrigation techniques, timers, and moisture sensors can be utilized to reduce excess watering and promote water conservation. Furthermore, stormwater runoff can be collected in cisterns, which in turn can be used in place of potable water in these more efficient irrigation systems.
Runnels: Runnels are surface depressions in sidewalks that safely channel small amounts of stormwater runoff. At EPA’s William Jefferson Clinton Building South Courtyard, runnels channel stormwater to the cistern for reuse in the irrigation system.
Sustainable Landscaping: Sustainable plant species thrive with minimal maintenance. Most are native plants that are well adapted to local conditions and best suited to respond to and/or reduce stormwater runoff. View the sustainable landscaping planting plan or the William Jefferson Clinton Building South Courtyard plant list. For more on this topic, visit EPA's WaterSense Program, Greenacres, or Mid-Atlantic Region Green Landscaping websites.
The following are examples of other sustainable design strategies employed in the William Jefferson Clinton Building South Courtyard (not related to stormwater management):
Plant sign made from farm tools
|Recycled content patio furniture||Recycled plastic used for walls of control bunker|
|Recycled glass cistern cover||Historic granite curb removal||New location and use for historic granite curb as bench|
Water-Efficient Historic Fountain: Another feature added to the historic fountain at the William Jefferson Clinton Building South Courtyard is a recirculating pump that reuses water and eliminates the need for continuous potable water use.