Northeast Boundary Tunnel Project
Florida Avenue NW Construction Site Newsletter
& Rhode Island Avenue NW Median Removal Update
March 26, 2019
Update: Median Removal on Rhode Island Avenue
The contractor for DC Water’s Northeast Boundary Tunnel
(NEBT) is preparing to remove the two medians on Rhode Island
Avenue NW between North Capitol Street NW and 2nd Street NW. While
the construction was scheduled to begin March 11, there has been a
delay in the permitting process. We continue to work with the
District Department of Transportation to reduce the number of trees
removed while assuring the construction site area is safe. We
anticipate that work will be permitted to begin on or about April
4, 2019.In the meanwhile, thank you for your
Florida Avenue NW Construction Site Newsletter
DC Water’s Clean Rivers Project has initiated construction of the
Northeast Boundary Tunnel (NEBT). Salini-Impregilo/Healy Joint
Venture (SIH) is the design-builder for the NEBT. The contractor
will begin mobilizing Construction Staging Area (CSA) 1 of the
Florida Avenue (FLA) NW Construction Site on or about Monday, April
Florida Avenue NW Construction Site Map
CSA1 mobilization (the blue section on the above map) requires the
contractor to close 3rd Street NW between Rhode Island Avenue NW
and Florida Avenue NW. CSA1 will be in place through winter 2022.
construction staging area requires closing the 1700 block of
3rd Street NW in both directions between Rhode Island Avenue
NW and Florida Avenue NW.
The 200-block of S
Street NW will be accessible to traffic from 2nd Street NW
The alley between
the 200 blocks of Rhode Island Avenue NW and S Street NW will
be closed at the 3rd Street entrance. The alley entrances from
2nd Street NW and S Street NW will remain
Parking on the
northbound side of the 1700 block of 3rd Street NW will be
Pedestrians will be
detoured to the east side of the 1700 block of 3rd Street NW.
across 3rd Street NW along Florida Avenue NW and Rhode Island
Avenue NW will remain open.
Mobilization of CSA1 on 3rd Street NW
Mobilization on 3rd Street NW includes setting up a fenced area
around the perimeter of CSA1. Mobilization also includes preparing
the site for construction, delivering equipment and materials to
the site, installing erosion and sediment protections, installing
geotechnical instrumentation used for monitoring operations, and
setting up for secant pile installation operations required for the
support of excavation for the drop shaft.
To relieve chronic sewer flooding, DC Water will construct a
diversion facility which will include a diversion chamber, a
20-foot diameter drop shaft, and other structures to convey flow
from the existing sewer to the tunnel. The Florida Avenue Diversion
Facility is designed to convey a peak flow rate of 322.8 million
gallons per day to the tunnel system.
When construction begins on 3rd Street NW, trucks delivering
equipment to the site and removing excavation material will follow
the established haul route for the Florida Avenue Construction
Site. The route is designed to cause as little impact as possible
during the day. Hauling activities will occur between the hours of
9:30 AM and 3:30 PM to lessen the impact on the commuting public.
The haul route for the Florida Avenue NW Construction Site is
graphically presented here.
Florida Avenue NW Construction Site Haul Route Map
Scope of Work
Once mobilization is complete, SIH will begin construction work. To
continue to provide two-way traffic along Florida Avenue NW when
the contractor occupies FLA CSA2 (the yellow section on the
Construction Site Map above), portions of the curb and sidewalk
will need to be temporarily removed along the southbound part of
Florida Avenue NW between 4th Street NW and 3rd Street NW. However,
the contractor will maintain space for pedestrian traffic.
Pedestrians will follow the detour to cross Florida Avenue NW at
4th Street NW. Additionally, the crosswalk at 4th Street NW and
Florida Avenue NW will be striped with high visibility zebra
Florida Avenue NW
Construction Site Schedule
The NEBT Outreach Team is committed to providing you with the
information you need about upcoming work, detours, and outreach
events; and will periodically distribute printed and electronic
newsletters, and maintain an updated project webpage and a 24-hour
Learn More at Outreach
Street NW Information Table, March 27, 2019, 6:30 PM—7:30 PM,
intersection of 3rd Street NW and Florida Avenue NW near the
BP Gas Station.
team will answer community questions about the 3rd Street NW
Forum Meeting, April 11, 2019, 6:30 PM—8:00 PM, location
to be announced.
team will update residents and businesses about the
construction schedule and work, and address construction
Northeast Boundary Tunnel
The Northeast Boundary Tunnel (NEBT) is the largest component of DC
Water's Clean Rivers Project. Chris, the Tunnel Boring
Machine, started mining from south of RFK stadium and will extend
north to Rhode Island Avenue, NE, and west to 6th Street, NW. The NEBT
is a 5-mile tunnel section that will complete the Anacostia River
Tunnel System by connecting to the First Street Tunnel and the
Anacostia River Tunnel. Through this tunnel system combined sewer
overflows (CSOs), that currently discharge to the Anacostia River,
can travel by gravity a total of 13 miles down to DC Water's Blue
Plains Advanced Wastewater Treatment Plant.
The Northeast Boundary Tunnel will significantly reduce chronic
flooding in the northeast region of the District and increase the
level of removal of CSOs from the Anacostia River from 88% to 98%.
Thank you for your patience during this critical project.