TagThird Runway(1067)

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  • The Great Wall Of Sea-Tac

    In 1996, the Puget Sound Regional Council (PSRC) gave final approval to the Port of Seattle’s proposal to build a Third Runway. The airport was originally sited on a small plateau about 430 feet above sea level, which ended immediately at the west side of what is now Taxiway Tango. The basic struggle in airport

  • ACC Water District #54 Des-Moines Creek SEPA 2000

    Aerial map showing the Des Moines Creek Regional Capital Improvement Project, depicting infrastructure elements including Northwest Ponds (Cells 1 and 2), Tyee Pond, Tyee Diversion Pipe, Outlet Control Structure, Berms A and B, Bypass Pipe, and connections to existing pipes. The map legend identifies existing wetland channel reconstruction, excavation cells, berms, new bypass pipe, Tyee diversion pipe, and existing pipe, with streets S. 196th St., S. 200th St., and 11th Ave S. visible.

  • Don Wasson House, Des Moines Marina, Google Earth View to Third Runway

    Google Earth satellite image of Des Moines, Washington, showing a red line tracing a route from the Wasson House and Conveyor Dock area near the waterfront northward through the Des Moines Creek Trail corridor to S 188th St near Sea-Tac Airport. Labeled landmarks include the SCORE Jail, Des Moines Creek Trail Park 200th, Des Moines Memorial Drive, and Highway 509, with the route passing through the airport's noise-impacted green buffer zone.

  • Diagram_MSE

    Technical cross-section diagram illustrating the components of a Mechanically Stabilized Earth retaining wall, including labeled elements: soil reinforcements, select backfill, retained backfill, facing, and foundation. This type of structure is commonly used in transportation and geotechnical engineering applications.

  • MSE_graphic

    A structural/geotechnical engineering diagram comparing horizontal and vertical displacement behavior of a soil block with and without soil reinforcements. The left panel shows lateral displacement (δH/2) occurring without reinforcements, while the right panel shows zero lateral displacement (δH=0) when soil reinforcements are present, with only vertical settlement (δV) in both cases.

  • seaTac2

    A massive segmental concrete block retaining wall is shown under construction, with workers in high-visibility safety vests visible at its base for scale. A watermark reading 'Photo courtesy of Hart Crowder' is visible in the lower left corner.

  • Third Runway Retaining Wall

    Construction workers in high-visibility vests and hard hats walk along the base of a massive segmental concrete block retaining wall, several stories tall. The site shows a gravel access road and erosion control markers, consistent with an active earthwork or infrastructure project.

  • seaTac3

    A large mobile industrial processing or water treatment unit is shown at an active work site, with visible mud, hoses, ladders, and heavy machinery. A watermark in the lower left reads 'Photo courtesy of Clear Water Compliance.'

  • seaTac1

  • thirdrunway retaining wall-DSC 0848