6. Lafarge North America Inc.
12950 Worldgate Drive, Suite 500
Herndon, VA 20170
Phone: 703-480-3600
Web site: www.lafarge-na.com

7. Cemex, Inc.
840 Gessner, Suite 1400
Houston, TX 77024
Phone: 713-650-6200
Web site: www.cemexusa.com

8. Holcim/Aggregate Industries
7529 Standish Place, Suite 200
Rockville, MD 20855
Phone: 301-284-3600
Web site: www.aggregate-us.com

9. MDU Resources Group, Inc./Knife River Corp.
1150 West Century Ave.
Bismarck, ND 58506
Phone: 701-530-1400
Web site: www.kniferiver.com

10. Florida Rock Industries, Inc.
155 East 21st St.
Jacksonville, FL 32206
Phone: 904-55-1781
Web site: www.flarock.com

11. Rogers Group, Inc.
421 Great Circle Road
Nashville, TN 37228
Phone: 615-242-0585
Web site: www.rogersgroupinc.com

12. Trap Rock Industries, Inc.
460 River Road
Kingston, NJ 08528
Phone: 609-252-8927
Web site: www.traprock.com

13. Vecellio & Grogan, Inc.
2251 Robert C. Byrd Drive
Beckley, WV 25801
Phone: 800-255-6575
Web site: www.vecelliogrogan.com

14. Luck Stone Corp.
515 Stone Mill Drive
Manakin, VA 23103
Phone: 800-898-5825
Web site: www.luckstone.com

15. Texas Industries, Inc. (TXI)
1341 West Mockingbird Lane
Dallas, TX 75247 • Phone: 972-647-6700
Web site: www.txi.com

16. Granite Construction Co., Inc.
585 West Beach St.
Watsonville, CA 95076
Phone: 831-724-1011
Web site: www.graniteconstruction.com

17. O-N Minerals/Oglebay Norton Co.
1001 Lakeside Ave., 15th Floor
Cleveland, OH 44114
Phone: 216-861-3300
Web site: www.oglebaynorton.com