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A vibrant Seattle through transportation excellence Interim Director, Goran Sparrman

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South Lander Street Grade Separation Project

Revised March 28, 2013

This project was placed on hold as of March 2008 due to funding limitations. The future schedule of the project is unknown at this time, though the project remains a priority for SDOT.

The project would serve a need recognized in The Access Duwamish Report. The comprehensive study, of transportation and freight needs, recommended a series of projects to separate railroad tracks from street crossings, increasing safety and improving mobility. Thanks to the Bridging the Gap transportation funding package a type, size and location study was begun in 2003 for one of these projects, the South Lander Street Grade Separation.

The proposed bridge structure over the BNSF railroad tracks would touch down at First Avenue S and Fourth Avenue S, ultimately providing a roadway that would no longer be impacted by the railroad operations.

In January of 2007, SDOT staff and a design consultant began the early stages of design and the process of meeting with property owners immediately adjacent to the project.  However, this project was placed on hold as of March 2008 due to funding limitations. The future schedule of the project is unknown at this time, though the project remains a priority for SDOT.

Benefits of this important project:

  • Improve safety on a road that currently crosses BNSF railroad tracks by separating vehicles and pedestrians from train activities.
  • Improve access to SODO and the Duwamish industrial areas.
  • Reduce traffic delays caused by train crossings, improving mobility and reliability for travel east and westbound between key south and northbound corridors.
  • Enhance access to one of the largest port operations in the United States.
  • Help keep traffic moving during the replacement of the Alaskan Way Viaduct.

  1. Type, Size, and Location Study (Word format)

  2. Vicinity Map (PDF format)

  3. Photo Key (PDF format)

  4. Photos in numerical order:

    01 - First Avenue S. and S. Lander Street - Facing East
    02 - Occidental Avenue S. - Facing South
    03 - Occidental Avenue S. - Facing North
    04 - Occidental Avenue S. and S. Lander Street - Facing East
    05 - BNSF Tracks and S. Lander Street - Facing Southeast
    06 - BNSF Tracks and S. Lander Street - Facing South
    07 - Third Avenue S. and S. Lander Street - Facing West
    08 - Third Ave S. - Facing South
    09 - Third Ave S. - Facing North
    10 - BNSF Tracks and S. Lander Street - Facing Northwest
    11 - BNSF Tracks and S. Lander Street - Facing North

    Drawings

  5. Plan and Profile

  6. Plan View At-Grade

  7. Typical Roadway Cross-Section

  8. Concrete Box Girder Bridge Plan and Elevation

  9. Concrete Box Girder Bridge Typical Section

    Other Concepts Considered

  10. 2 Lane Overcrossing Concept

  11. 4 Lane Undercrossing Concept

  12. 2 Lane Undercrossing Concept

  13. Option 1A - Steel Girder Bridge Plan and Elevation

  14. Option 1A - Steel Grider Bridge Typical Section

  15. Option 1B - Dual Pony Truss Bridge Plan and Elevation

  16. Option 1B - Dual Pony Truss Typical Section

    Turning Movement Analysis

  17. First Avenue S. and S. Lander Street WB-67 Turning Movements

  18. First Avenue S. and S. Lander Street WB-67 Turning Movements

  19. Occidental Avenue S. WB-50 Northbound Turning Movements

  20. Occidental Avenue S. WB-50 Southbound Turning Movements

  21. Occidental Avenue S. WB-67 Northbound Turning Movements

  22. Occidental Avenue S. WB-67 Southbound Turning Movements

  23. Third Avenue S. and S. Lander Street WB-67 Turning Movements

  24. Fourth Avenue S. and S. Lander Street WB-67 Turning Movements

  25. Fourth Avenue S. and S. Lander Street WB-67 Turning Movements

 

 

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