A welder attaches protective shields to one of the two 21-foot-diameter tunnel-boring machines at the north end of the project near Husky Stadium. The entrance to the northbound tunnel is at upper right.
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Tunnel boring to begin on light-rail link in Seattle

This week, Seattle’s Sound Transit will start drilling a $2 billion, three-mile light-rail tunnel to connect the University of Washington, Capitol Hill and Westlake Center. The first TBM will be christened today near UW’s Husky […]


Holocene Drilling installing borehole extensometer on University of Washington campus
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Holocene Drilling Handles Tunnel Project

Specialty geotechnical drilling contractor Holocene Drilling of Edgewood, WA recently completed work on an interesting project for Sound Transit’s U-220 TBM Tunnel Project at the University of Washington Campus in Seattle. Their scope included drilling […]