WMATA Gallery Place – Chinatown Station Passageway

Washington Metropolitan Area Transit Authority [WMATA]
Washington Metropolitan Area Transit Authority
$8 million USD
August 2018 — September 2018
Services performed
Dr. Sauer & Partners provided construction methodologies for the proposed passageway, including considerations of instrumentation & monitoring, breaking in and out of the platforms through existing station structures, preliminary FE calculations, risk management, and cost assessment.
In order to relieve capacity constraints and increase passenger safety during peak travel periods at Gallery Place – Chinatown Station, WMATA considered the construction of a new diagonal passageway connecting the platform level of the Red Line with the mezzanine level above the Green and Yellow Line. The proposed passageway provided improved passenger movement through the station to alleviate platform overcrowding. Additionally, the passageway also included emergency egress to the street via a stairway and a hatch opening at the sidewalk along G Street NW.
Fill, alluvium, and Pleistocene terrace deposits of sand with silt and gravels.
Washington DC, USA


  • Dense, urban environment.
  • Break-In into existing, live operating subway lines.
  • Challenging soil and ground water conditions, which require ground treatment prior tunnelling.

Rendering of Planned Passageway

Rendering of Planned Passageway Break-in to Exisiting Line