US 17 Farrow Parkway Bypass

Geotechnical design and seismic analysis for dual 1,250-foot bridges.


Myrtle Beach, South Carolina

In 2010, GeoEngineers provided geotechnical services for a $120 million interchange at the intersection of US 17 and Farrow Parkway/SC 707 in Myrtle Beach, South Carolina. The South Carolina Department of Transportation (SCDOT) wanted to replace the existing at-grade intersection with two 1,250-foot-long bridges and associated access ramps, and GeoEngineers provided services as a subconsultant to lead design firm SVT.


Soft Soil Challenges
Poor soil conditions at the coastal site meant additional geotechnical analysis, a ground improvement program to support the structure, and drainage features for permanent dewatering.

Seismic Design
The project was located in one of the East Coast’s most active earthquake regions, so GeoEngineers performed additional seismic analysis and addressed a number of issues during the design phase.


GeoEngineers’ careful geotechnical analysis, ground improvement program, and seismic engineering gave SVT and SCDOT the confidence to proceed with construction in a challenging soft soil environment, and the completed interchange is improving safety and reducing traffic congestion for the South Carolina traveling public.

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