Foundation soil springs for foundations and retaining walls were an integral part of developing a 3-D structural model used for the design of the I-520 overpass bridge in Redmond, Washington.

Part of a seismic retrofit, seismic response analysis and soil-structure interaction numerical modeling were used to develop the most realistic and cost effective seismic retrofit design option for the Murray Morgan Bridge. (Image by Ben Brooks, use covered by Creative Commons License https://creativecommons.org/licenses/by-sa/2.0/legalcode)

The Harbor River Bridge in coastal South Carolina spans more than 3,500 feet. GeoEngineers' geotechnical design included foundation design and seismic design parameters in soft ground conditions, and ground improvement design to mitigate soil consolidation and liquefaction issues.

Seismic and numerical modeling were used to evaluate load performance of the 520 Floating Bridge over Lake Washington – one of GeoEngineers' most successful design-build projects.