• Hydrographic Surveying

  • Bathymetric Surveys

  • Sedimentation Surveys

  • Soundings

  • Shoreline Monitoring
  • Dredging Support Services: Pre/post-dredge volumes


Working with you to build strong communities

The Art & Science of Underwater Surveying

With a wide range of vessels GFA is positioned to respond to all types of water bodies throughout the Great Lakes basin. Our team regularly uses single-beam, multi-beam and terrestrial scanners in conjunction with in-office, high-volume data processing. Our hydrographic surveying services are conducted and packaged in accordance with US Army Corps of Engineers specifications. These services are available as needed and also in support of our other capabilities, including: bottomland lease conveyances, marina improvements, boat launches, structures to deter invasive species, and more.

Experienced government contractor (click here for record), IDIQ contracts