Civil Engineering

GSG understands that the design of infrastructure can have a lasting impact on society. Here at GSG, our Civil Design Engineers customize their approach to each client to meet their specific needs and goals. Our clients range from Public Sector clients including State, County, and Municipal Agencies to Private Sector clients such as developers, architects, and planners.  

Below are design services that GSG provides:

  • Roadway and Site Geometrics
  • Stormwater Detention Systems
  • Hydrologic and Hydraulic Studies
  • Floodplain Analysis and Modeling
  • Watermain Replacement and Expansion
  • Residential, Commercial, and Industrial Developments
  • Earthwork Calculations
  • Stormwater Pollution and Prevention Plans
  • Entitlements

Structural Engineering

For nearly more than 2 years GSG Consultants has developed a structural bridge design, preservation and inspection group with the goal to offer innovative and sustainable solution. Leveraging our team’s versatile experience, we’ve partnered with clients to offer innovative solutions and demonstrate collaboration toward consulting services in structure design, bridge analysis and load rating and inspection of all structures that serve as our state’s safe infrastructure.

Bridge Analysis and Load Rating

As one of consultants of Illinois Tollway General Engineering Consultants (GEC), GSG Consultants offers comprehensive services with the analysis and load rating of all the Illinois Tollway highway bridges. We offer our capabilities to help Illinois Tollway manage the analysis and rating of its large inventory using the AASHTOWare Bridge Rating (BrR) software that allow Illinois Tollway GEC to quickly load rate and evaluate permits for any user-defined vehicles, saving time and money and enhancing safety.

Bridge Inspection

GSG Consulting Structures team is fully certified and provides bridge, wall and culvert inspections, load rating and design for client such as City of Chicago Department of Transportation and Illinois Tollway.


  • Highway Bridge, Walls and Culvert Safety Inspection
  • Overhead Sign Inspection
  • Bridge Asset Management

Bridge Design

GSG Consultants structural team experience range from small box culverts and retaining walls to major complex river crossing, including trusses and arches.

As one of consultants of Illinois Tollway General Engineering Consultants (GEC), GSG Consultants bridge design team offers design management technical services for all design contract reviews and updates yearly design manual, specification and drawing standards.


  • Highway and River Crossing Bridges
  • Bicycle and Pedestrian Bridges
  • Retaining Walls and Noise Walls
  • Bridge Rehabilitation