Society of Explosives Engineers, Great Lakes Chapter

State Aggregate and Related Trade Associations

Aggregate Producers of Wisconsin

American Council of Engineering Companies of Illinois

Iowa Limestone Producers Association

Illinois Asphalt Pavement Association

Illinois Ready Mixed Concrete Association

Illinois Road and Transportation Builders Association

Indiana Mineral Aggregates Association

Kentucky Crushed Stone Association

Michigan Aggregates Association

Ohio Aggregates and Industrial Minerals Association

Federal Government Agencies

Corps of Engineers

U.S. Department of Labor, Mine Safety and Health Administration

U.S. Environmental Protection Agency

U.S. Department of Transportation

U.S. Geological Survey

National Highway Organizations

American Association of State Highway and Transportation Officials

American Highway Users Alliance

The Road Information Project

State Government Agencies and Organizations

Illinois Environmental Protection Agency

Illinois Department of Natural Resources

Illinois Department of Transportation

Illinois General Assembly

Illinois State Geological Survey

Aggregate and Geological Resources

Illinois State Museum

Illinois State University

Mineral Information Institute

National Energy Foundation

Smithsonian Institution's Rocks Gallery

University of Illinois

Women in Mining