Sound Transit Beacon Hill Station

Owner

Central Puget Sound Regional Transit

Client

Hatch MottMacDonald

Cost

$250 million USD

Timeframe

January 2002 — January 2009

Services performed

Optimizing station and tunnel configurations, interpreting geologic information, preliminary and detailed design, developing 3D Finite Element Models and performing structural and seismic design.

Description

Beacon Hill Station is part of the 22.5 km initial segment of Sound Transit’s Central Link Light Rail. It is located 49 m below the ground surface in complex glacial soils with multiple groundwater horizons. The project comprises deep mined station tunnels and two 1.5 km long running tunnels excavated using a tunnel boring machine. The mined station was excavated through compressible glacial soils with multiple groundwater horizons using conventional mining techniques. The access shafts and station headhouses were constructed using slurry walls and cut-and-cover techniques.

Geology

Beacon Hill Station is located 49 m below the ground surface in complex glacial soils with multiple groundwater horizons.

Location

Seattle, USA