1) AECom

2) American Airlines, Inc.

3) American Concrete Pavement Association

4) American Concrete Pipe Association

5) Association of American Railroads

6) Chesapeake Energy

7) Consumer Electronics Association (CEA)

8) Dredging Contractors of America

9) Exelon

10) Oklahoma Department of Transportation

11) Portland Cement Association

12) Santa Rosa County, FL

13) Stella Jones Corporation (formerly known as McFarland Cascade Holdings, Inc.)

14) Williams Companies