Project Update - 11th Street Corridor
November 20, 2012Location: Washington, D.C.
Drivers in our Nation's Capital are already
receiving benefits from the on-going 11th Street Corridor project
as new freeway ramps and bridges are completed.
D.C. area drivers have waited decades for full connectivity
between I-295 and I-695 in the Anacostia area, near landmarks such
as the U.S. Capitol and the Washington Nationals stadium. In
2010, the Skanska/Facchina/JMT Design-Build Team began construction
of the 11th Street Corridor bridges, DC Department of
Transportation's (DDOT) largest capital improvement project.
DDOT's primary goals included:
- Better regional connections through the District of Columbia by
linking the Anacostia Freeway (DC 295/I-295) and Southeast Freeway
(I-695) with new bridges and providing for missing movements in
- An alternate evacuation route and routes for security movements
in and out of the nation's capital.
- Improved local road, pedestrian and bicycle connections which
provide users with easier accessibility to DC neighborhoods.
- Provisions for Future DC Street Car System, and
- Replacement of deficient infrastructure.
DC area motorists' patience is finally being rewarded as new
ramps and bridges over the Anacostia River are opened to traffic
- Two new bridges carrying interstate traffic across the
Anacostia River connecting the Anacostia Freeway to and from the
south to the Southeast Freeway.
- A new bridge carrying two-way local traffic across the
Anacostia River connecting the Capitol Hill and Anacostia
- A ramp providing, for the first time ever, direct access both
to and from downtown DC at this location.
- Two new ramp connections to and from the Anacostia Freeway to
11th Street and the local street network.
Significant cost savings have been realized by DDOT. The
original engineer's estimate to complete the entire project was
$460 million. Due to budget constraints, DDOT undertook a $260
Million Design-Build-to-Budget Stipulated Sum procurement with a
challenge of seeing how much of a functional improvement could be
built for this sum. Key to this challenge was maximizing
construction of key project elements including rehabilitation or
replacement of existing bridges and providing interchange
connectivity. The Design-Build Team of Skanska/Facchina/JMT was
selected as the team that would provide DDOT the best value
providing three new bridges over the Anacostia River and building
approximately 75% of the ultimate project at a cost savings of $85
million under the engineer's estimate. Construction of this
initial phase is scheduled for completion by mid-2013.
As a result of the Team's innovative and cost effective design
and construction, the Skanska/Facchina/JMT Design-Build team was
awarded a $90.73 million contract this year to complete the final
design and construction of the total project to provide the full
functionality considered in the NEPA documentation. With a
total design and construction cost of approximately $351 million,
DDOT has saved a total of $109 million from the original engineer's
estimate. Design is underway for the complete project and
construction is expected to be complete in July 2015.
As the Lead Designer, JMT is responsible for overseeing all
engineering elements including the design of 18 new bridges, three
of which are new major continuous steel multi-girder bridge
crossings of the Anacostia River and two complex interchanges with
the Southeast Freeway and Anacostia Freeway. We have met all
project goals by utilizing innovative design to refine the planning
document alignments and interchanges, satisfied all environmental
commitments, minimized community impacts, maintained traffic, and
built public support through extensive public involvement. All this
has been accomplished while saving substantial construction
Our design team subconsultants include:
- Athvale, Lystad & Associates
- KLS Engineering
- Mueser Rutledge Consulting Engineers
- McKissack & McKissack
Traffic continues to be maintained in this extremely-congested
urban environment through a complex phasing plan that was developed
in close coordination between the construction and design
teams. Seventy-five percent of the project has been
constructed without major interruption to vehicular
traffic. The general philosophy of the phasing was to build
offline and shift traffic from the existing roadway to the new
roadway providing a safer work zone for both the construction
workers and the traveling public. Pedestrian and bicycle traffic
has been continuously maintained across the Anacostia River
throughout the duration of construction.
With four new ramps scheduled to be opened to traffic before the
end of 2012, this complex project continues to move swiftly toward