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Real estate developers

Our geotechnical engineering ingenuity brings an 850-foot Seattle tower to life

56 stories

in newly constructed tower

90 feet

depth excavated (one of the deepest excavations in Seattle’s history)


  • Wright Runstad & Company planned to build the second-tallest building in downtown Seattle with as much underground parking as possible.
  • To accomplish this high-profile project, the company would have to keep next door’s 41-story Rainier Tower stable despite difficult soil conditions.
  • Haley & Aldrich met that challenge by identifying a first-ever design and geometry of excavation and support for dense urban centers, which can be leveraged to maximize use of other partially developed city blocks.
  • We also provided a performance-based seismic design for the tallest Seattle tower built in the past 30 years, resulting in a safer, more resilient structure.

For more information, contact:

David Winter

Senior Principal Consultant

Brice Exley
Brice Exley

Principal Consultant, Geotechnical Engineering