Capitol Crossing

Delon Hampton & Associates (DHA) provided civil and structural design review services as well as construction observation support services for the multi-phase, master-planned development is located in Washington, DC’s Central Business District (CBD). The seven-acre site encompasses three city blocks and was built over a portion of I-395 utilizing a platform to support development of the 2.2 million SF project. The five mixed-use buildings will include primarily office space, ground-floor retail and restaurants (approximately 75,000 SF), below-grade parking, and a small component of residential use. As the largest undeveloped site remaining in the CBD, this development is designed to qualify for LEED Platinum certification.

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DHA was retained directly by DDOT as a third party reviewer of the Capitol Crossing project construction documents. The project involves the extension of the I-395 tunnel from E Street, NW to Massachusetts Avenue. Our civil and structural design reviews included highway design, horizontal and vertical alignments, and utility designs. Utilities consist of new and relocated water mains, including a 30-inch water main along Massachusetts Avenue; sewer mains; stormwater drains; and electric and telephone conduits.