Companies

• Advanced Drainage Systems

• Artisan Painting

• Atlantic States Cast Iron Pipe Co.

• Blankenship Heating & Cooling Inc.

• Brocar Products

• Cambridge Seven Associates, Inc.

• Campbell Foundry Co.

• Carr Concrete Corp.

• Cherne Industries

• Composite Structures, Inc.

• Contech Construction Products Inc.

• Copeland Corporation

• Diamond Plastics Corporation

• Diamond Plastics Corporation

• EJ

• FE Myers

• Gorman-Rupp Company

• Granite Construction Co of Utah

• Gym-Con Ltd.

• Hancor

• Hardy Holzman Pfeiffer Associates

• Hoffman Air & Filtration Systems

• Insituform Technologies

• J.L. Turner Co.

• Jay R. Smith Mfg. Co.

• Lafarge Calcium Aluminates