Children’s Hospital Campus

Seattle Children’s Hospital/Seneca Group

Seattle, Washington

Seattle Children's Hospital Building Hope

Photo: Benjamin Benschneider

Hart Crowser provided geotechnical engineering design for the Building Hope project, which added an eight-story, 330,000-square-foot building to the campus. The American Council of Engineering Companies of Washington (ACEC) awarded Hart Crowser a 2015 Gold Engineering Excellence Award for Exceeding Owner/Client Needs for this project. We have also worked on numerous other additions over the past three decades. For the most recent work, Seattle Children’s Hospital needed a new emergency department and new critical care and cancer units. Building Hope fulfilled this urgent need for new and better space.

Enhanced Seismic Assessment. Seattle Children’s Hospital required an enhanced seismic assessment that went above and beyond minimum code-based requirements. This assessment included evaluating seismic hazards including directivity and near fault effects on ground motions that could arise from the nearby Seattle Fault as well as long duration hazard from a Cascadia Subduction Zone earthquake. Both structural and nonstructural components were included in the assessment. As part of our work we selected and scaled three component (X, Y, and Z) ground motion records and provided them to the structural engineer for their seismic analysis of the building.

Challenges. We overcame many challenges, including seismically unstable soil conditions, construction immediately adjacent to an operational hospital that had children resting just on the other side of a building wall, and sustainability goals. Seattle Children’s Hospital also challenged the design and construction team to do more with less money, so that more resources could go directly to healing children.

Sustainability. Our services included evaluating infiltration potential at the site to support green infrastructure including pervious pavement, rain gardens and bioswale facilities.

Children's Hospital Rain Garden