CAMPUS MASTER PLAN FOR DUPONT'S
AGRICULTURAL CHEMICALS WORLDWIDE HEADQUARTERS
The Dupont Corporation
Wilmington, Delaware
Faced with severe stormwater management issues and a massive site construction program that threatened to obliterate scenic woodlands, the DuPont Company decided to immediately reassess site development plans in order to preserve site amenities at its Barley Mill Plaza office campus, outside Wilmington, Delaware. Cahill Associates analyzed the entire stormwater management system and revised plans for roads and parking, and landscape plantings to achieve the goal of preservation and enhancement of site aesthetics.

Using computer models to simulate the complex hydrologic impact of the development as well as the contributing watershed upstream, CA applied a combination of groundwater recharge and surface impoundment technologies to minimize stormwater facilities and maintain existing woodlands.

Stormwater recharge beds were situated below porous-pavement parking bays. The landscape plantings were native plants and bioengineering was used to stabilize streambanks. Preservation of the existing forest offered an opportunity to create a woodland trail to be used by DuPont employees. This stormwater system is one of our oldest installations, and continues to function today.
Site Photographs

DuPont Corporation Agricultural Chemicals headquarters.

The original stormwater management design would eliminate a large woodlot to construct a detention basin.

Our stormwater management design preserved the existing stream and forest by recharge runoff into infiltration beds located beneath the parking lots.