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Abstract: The Northeast Boundary Tunnel (NEBT) is a 5 miles long tunnel and is the largest component of the Clean Rivers Project. The NEBT will connect the existing sewer system to significantly mitigate sewer overflow while improving the water quality of the Anacostia River. The NEBT includes construction of Tunnels, Shafts, Adits and Near Surface Structures and will be completed in 2023. The...