U.S. Department of Transportation (DOT)
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The U.S. Department of Transportation Greenroof about 8 months after planting; Photos Courtesy of Wayne MillsProject Name: U.S. Department of Transportation (DOT)
Year: 2007
Owner: JBG Properties
Location: Washington, DC, USA
Building Type: Municipal/Government
Type: Extensive
System: Single Source Provider
Size: 69000 sq.ft.
Slope: 1.5%
Access: Accessible, Private
Submitted by: Wayne Mills, Wayne's Wholesale Nursery

Designers/Manufacturers of Record:
Architects: Corush, Sunderland, & Wright
Plant Supplier: Wayne's Wholesale Nursery
Plant Installation: Davey Tree Co.
Soil Supplier: JK Enterprise Landscape Supply
Roofing Contractor: Gordon Contractors Inc.
Greenroof Installation: Gordon Contractors Inc.
Photos Courtesy of Wayne MillsPhotos Courtesy of Wayne MillsThe U.S. Department of Transportation Greenroof about 9 months after planting with 50% coverage; Photos Courtesy of Wayne Mills
The new Department of Transportation Headquarters facility is located near the Navy Yard in Southeast Washington D.C. The photos shown here were taken between 8-9 months after planting from different viewpoints.
Photos Courtesy of Wayne Mills
The DOT greenroof includes various drought-resistant succulents planted in a mixture of sand and engineered soil. Approximately 136,000 sedums were planned for this project, 72 cell size and included:

Sedum floriferum kamtchaticum, Sedum spurium tricolor, Sedum spurium 'Fuldaglut', Sedum 'John Creech, Sedum album 'Coral Carpet', Sedum acre 'Gold Moss', Sedum linaris 'Blue Spruce'.

Additional thumbnail photos:

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