Architectural

• American Institute of Architects (AIA)

Engineering

• American Association of State Highway and Transportation Officials (AASHTO)
• American Society of Civil Engineers
• The American Council of Engineering Companies
  of Illinois
• The American Council of Engineering Companies
  of Missouri
• Federal Highway Administration
• Hanson-Wilson Inc.
• TNH-Hanson, LLC
• Illinois Department of Transportation
• Indiana Department of Transportation
• Missouri Department of Transportation
• Missouri Society of Professional Engineers
• Society of American Military Engineers

Media

• CE News
• Network Knowledge: WMEC/WQEC/WSEC
• Engineering News-Record
• Midwest Construction
• Nova “Super Bridge” feature on the Clark Bridge

Project related

• Abraham Lincoln Presidential Library and Museum
• South Suburban Airport land acquisition and property management

Resources

• RF Yellow Pages

Community involvement

• American Red Cross
• Big Brothers Big Sisters
• Children’s Miracle Network
• Habitat for Humanity
• The Hope School
• Salvation Army
• Springfield Urban League Inc.
• United Cerebral Palsy
• United Way