The Gehrig team provides high quality engineering geophysics services for geoscientists and engineers. Are you designing a high-speed rail line, a new transmission line, or simply trying to avoid karst features on a new development? We can assist you with the right geophysical investigation to answer your critical questions.


Gehrig, Inc. successfully delivers essential geophysics services for a wide variety of civil engineering projects.  We can help you identify areas of geological concern or detect and delineate geological constraints for project design.


  • Top-of-rock profiling

  • Determination of in-situ engineering properties

  • Shear wave profiling (Vs30)

  • Karst and void delineation

  • Rippability surveys

  • Reinforcement and grade beam location

  • Detection and delineation of areas of geologic concern

  • Fault delineation

  • Dam and levee imaging

  • Pavement thickness surveys

  • Resistivity testing

  • Integration of multiple datasets into 3-D models

  • Level B Subsurface Utility Engineering (SUE)

  • Thermal Resistivity

  • Downhole/crosshole soil and rock properties