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May 21, 2021

Heavy/Industrial Over $20 Million

Photo from Guy F. Atkinson Construction
Work on the E330 Downtown Tunnel included 26,000 square feet of soil-nail wall support of excavation.

E330 Downtown Tunnel

Location: Bellevue

General contractor: Guy F. Atkinson Construction

The downtown Bellevue tunnel runs from the south portal near 112th Avenue Southeast and Main Street to the north portal at 110th Avenue Northeast and Northeast Sixth Street — adjacent to the Bellevue Transit Center. The work included 26,000 square feet of soil-nail wall support of excavation. The 1,985-linear-foot sequential-excavation method tunnel included tunnel pre-support lattice girders with shotcrete lining, groundwater control, waterproofing, final concrete lining, tunnel walkway, center dividing wall, embeds and conduits, and a mid-tunnel access shaft and exit. Construction of a 250-foot cut-and-cover structure was completed at the south portal. Work included utilities, pavement repair, sidewalks and signals.


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