After completing preliminary studies to assess and characterize landslide activity along US-85, including a preliminary study of mitigation options for the Horseshoe Bend landslide, the NDDOT selected Shannon & Wilson to complete final design of an anchored drilled shaft structure to stabilize the landslide.  

Our services included geologic mapping and reconnaissance, field explorations, instrumentation, a satellite-based assessment of ground movement using InSAR techniques, numerical analysis, and preparation of plans and specifications for the project.