Vital DC Infrastructure Rehabilitated

Rehabilitation of Anacostia Freeway Bridges over Nicholson Street

Serving over 135,000 vehicles per day, the Anacostia Freeway bridges over Nicholson Street are a vital part of the DC Metro Area infrastructure. Decades of heavy use without rehabilitation resulted in significant deterioration of the  bridge deck and adjoining ramps.

As a result of PRIME AE’s comprehensive concept design study report, Accelerated Bridge Construction (ABC) was identified as the fastest, safest, and most environmentally friendly solution. Using ABC, the mainline bridge was replaced in four stages of accelerated construction.  Total road closure time was decreased from a predicted four months to only six consecutive weekends for the ramp bridges. Traffic on mainline DC-295 was maintained at all times, and traffic on the DC-295 ramps was detoured during the weekend closures.

By pairing advanced construction methods and technology and communication with stakeholders, the PRIME AE design team was able to achieve DDOT’s goals, ensuring the reliable usability of the bridges for at least another 75 years.

2020 ACEC/MD Engineering Excellence Award Finalist

135K travelers served

75+ more years of usability