Section Design Consultant: Johnson, Mirmiran, & Thompson (JMT)/ Whitman Requardt & Associates, LLP (WRA) Joint Venture

The I-295 Interchange project involved the complete reconstruction of the existing interchange beginning at the Maryland abutment for the Potomac River Bridge and extending east approximately one mile. New ramps include those to the north (“to/from D.C.”) along I-295, connections to the "S-curve" ramps for MD 210 access, as well as direct connections to both the waterfront and beltway parcels at National Harbor.

Concurrent with the reconstruction of the I-295 Interchange, Rosalie Island was reconstructed to provide park amenities on the portion of the island south of the widened Beltway, a new deckover structure with landscaping as a gateway to Maryland and Prince George's County, and a connection from this deckover structure to the pedestrian/bicycle lane along the north edge of the Potomac River Bridge. A separate bridge approximately 1,700 feet in length connects the southern portion of Rosalie Island with the mainland, providing access for bicyclists and pedestrians.

·         Twelve lane miles of new mainline pavement for the Beltway and 14 lane miles of pavement for interchange ramps (total pavement area 235,000 square yards)

·         Twenty-two new bridges encompassing nearly 495,000 square feet of bridge deck

·         Approximately 504,000 square feet of retaining walls

Key environmental concerns associated with the reconstruction of the I-295 Interchange included special sensitivity for the bald eagle nest located southeast of the interchange, aquatic resources in Smoots Bay, park impacts at Rosalie Island and Oxon Hill Farm, as well as stormwater management. While some right-of-way has been required for the reconstruction of this interchange, there are no displacements and very limited utility impacts.