These sites are in no way endorsed by Gewalt Hamilton Associates, Inc. They are all separate from our company and are for informational/useful purposes only. If you have questions or comments regarding them, please contact the organization itself.


US Army Corps of Engineers
US Army Corps of Engineers Chicago District
Federal Aviation Administration
United States Fish and Wildlife Service Midwest Region
Federal Emergency Management Agency
United States Environmental Protection Agency
U.S. Environmental Protection Agency Region 5
United States Department of Transportation
United States Geological Services


Illinois Department of Transportation
Illinois Tollway
Illinois Environmental Protection Agency
Illinois Department of Natural Resources
Illinois Commerce Commission
Illinois Department of Public Health
Illinois Historic Preservation Agency
Natural Resources Conservation Service
Chicago Metropolitan Agency for Planning
Regional Transit Authority


Lake County Stormwater Management Commission
Lake County Division of Transportation
Soil and Water Conservation District of Mchenry-Lake County
Cook County Highway Department
North Cook County Soil & Water Conservation District
Will/South Cook Soil and Water Conservation District
Will County Department of Highways
Will County Stormwater Committee
McHenry County Division of Transportation
McHenry County Planning
DuPage County Division of Transportation
Kane-DuPage Soil & Water Conservation District
Kane County Division of Transportation
Kane County Stormwater Management
Metropolitan Water Reclamation District of Greater Chicago


American Association of State Highway and Transportation Officials
American Council of Engineering Companies
The American Institute of Architects
American Planning Association
American Public Works Association
American Society of Civil Engineers
The American Society for Public Administration
American Water Works Association
Illinois Association of County Engineers
Illinois Association of Highway Engineers
Illinois Association of Park Districts
Illinois City/County Management Association
Illinois Municipal League
Illinois Road and Transportation Builders Association
Illinois Sports Turf Managers Association
Institute of Transportation Engineers
National Main Street
Society of Wetland Scientists
Society of Women Engineers
Underground Contractors Association


Gewalt Hamilton and our staff are members of numerous prestigious professional organizations, including:
American Council of Engineering Companies of Illinois
American Planning Association, Illinois Chapter
American Public Works Association of Illinois, Chicago Metro Chapter
American Society of Civil Engineers, Illinois Section
ASCE Transportation and Development Institute
Chicago Wilderness Corporate Council
Engineers without Borders, Chicagoland Professional Chapter
GLMV Chamber of Commerce
Illinois Association for Floodplain and Stormwater Management
Illinois Association of Park Districts
Illinois Parks and Recreation Association
Illinois Road and Transportation Builders Association
Illinois Society of Professional Engineers
Institute of Transportation Engineers
Lake County Municipal League
National Society of Professional Engineers
Sports Turf Managers Association, Illinois Chapter
Township Highway Commissioners of Illinois, Lake County

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