Husky Stadium Redevelopment

University of Washington/Wright Runstad & Company

Seattle, Washington

Husky Stadium

Photo: Doug Scott

The American Council of Engineering Companies of Washington awarded Hart Crowser a Best in State Gold Award for complexity for this project. We were responsible for the geotechnical engineering and seismic design, and the hydrogeologic modeling and dewatering design for the new Husky Stadium. Using a combination of historical research and new data acquisition, Hart Crowser developed a strategy to eliminate liquefaction concerns and allow an improvement in seismic site classification over what had been used in the past. As a result, spread foundations were used for the entire new superstructure resulting in substantial cost savings. Below-grade elements also included complicated shoring walls and access tunnels. In several locations, lightweight fill (Geofoam) was used behind subgrade walls to reduce support requirements while still providing bearing support, resulting in schedule compression and cost savings. Hart Crowser completed a hydrogeologic model and dewatering plan to allow the planned lowering of the playing field surface by about 4 feet. At this new level the surface is within about a foot of the groundwater table. Hart Crowser’s design called for depression of the groundwater table to allow the contractor to work in relatively dry conditions throughout the wet winter months.

Sustainability. Hart Crowser worked with the contractors to develop ways to reuse onsite materials, both soil fill and concrete debris. We developed placement and compaction criteria for crushed concrete reuse as structural fill and oversaw placement of more than 26,000 cubic yards of the material. By establishing an on-site processing plant, we helped the team save more than 5,000 truck trips through the heavily congested University and residential neighborhoods.