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East Side Access

To relieve capacity congestion at Penn Station New York, and to provide LIRR passengers with direct access to East Midtown Manhattan, the LIRR will provide a new service into Grand Central Terminal (GCT) connecting the Port Washington Branch and Main Line tracks within Harold Interlocking in Queens to the lower level of the 63rd Street Tunnel. A new rail station will be added in the vicinity of Sunnyside Yard in Long Island City. The proposed LIRR facility at GCT would consist of a ten-track/five island platform facility for the exclusive use of LIRR passengers and trains. Deep excavation, new tunneling and extensive underpinning work will be required.

YU & Associates, Inc. (YU) supervised and coordinated the field exploratory work performed inside the Grand Central Terminal, inside active tunnels and rail yards, and on city streets. The analytical work included stress-strain analyses and retaining structures design for the various tunnel segments, chambers, shafts, emergency exit structures and reception pits. Numerical models were developed to analyze the stress-strain behavior of the soil and rock media around the tunnels using Phase 2. PLAXIS and GROUP were used to analyze deep excavations and pile foundations.


Manhattan and Queens,
New York


  • Subsurface Investigation
  • Boring Controlled Inspection and Field Testing
  • Data Interpretation
  • Tunnel Analysis
  • Retaining Structure and Bridge Foundation Analyses and Design
  • Finite Element Stress-Strain Analyses
Parsons Brinckerhoff
Long Island Rail Road