Boundary Tunnel Project First Street
NW Pumping Station Construction Site Newsletter July 19,
The First Street NW
Pumping Station Construction Site jet grout work was delayed due to
the additional coordination with the District Department of
Transportation on the traffic light infrastructure. DC Water's
contractor is rebuilding a collapsed electrical conduit under Rhode
Island Avenue, NW. Once that work is complete, the existing signals
in the middle of Rhode Island Avenue at First Street, NW will be
removed, traffic will be shifted, and the contractor will mobilize
for jet grout work to begin at the intersection of Rhode Island
Avenue and First Street, NW. This work is expected to begin the
week of July 22, 2019.
The contractor will install jet grout columns on the north side of
the intersection at First Street and Rhode Island Avenue,
NW. One method of stabilizing the soil on the Northeast
Boundary Tunnel Project is a process known as jet grouting, a
method of ground improvement that involves injecting cement and
water into the soil at very high pressures to solidify and
strengthen the ground. The improved ground will allow safe
excavation in the stabilized ground to connect the existing First
Street Tunnel with the new Northeast Boundary Tunnel.
Work is expected to begin the week of July
22, 2019, from 7 AM – 7 PM, Monday – Friday, and will
continue for approximately eight (8) months (weather permitting).
Rhode Island Avenue, NW between 2nd Street, NW and
North Capitol Street, NW will be reduced to two lanes of
traffic in each direction.
First Street NW between Thomas Street and Rhode
Island Avenue will be closed to northbound traffic. Detour
signs will be in place to direct traffic to 2nd
Parking will be restricted on the north and south
sides of Rhode Island Avenue, NW between North
Capitol Street and 2nd Street, NW.
There will also be restrictions to parking on both
sides of First Street, NW between Thomas Street and Rhode
Island Avenue, NW.
travel and parking restrictions on Rhode Island Avenue, NW and First
The north side crosswalk at the intersection of
First Street and Rhode Island Avenue, NW will be closed.
The eastbound crosswalk on Rhode Island Avenue, NW
at First Street will be closed. Detour signs will be posted to
Map of the
pedestrian detour on Rhode Island Avenue, NW and First Street, NW
The Northeast Boundary Tunnel is the largest component of the Clean
Rivers Project. It begins south of RFK Stadium and will extend
north to Rhode Island Avenue, NE and west to 6th Street
NW. When complete, the approximately five-mile long tunnel will
significantly reduce chronic flooding in areas it serves, as well
as reduce the amount of combined sewer overflows into the Anacostia
River by 98%.