1 EXHIBIT 21 VULCAN MATERIALS COMPANY SUBSIDIARIES AS OF DECEMBER 31, 1999 (ACTIVE SUBSIDIARIES ONLY) STATE OR OTHER % OWNED JURISDICTION OF DIRECTLY INCORPORATION OR INDIRECTLY ENTITY OR ORGANIZATION BY VULCAN ------ --------------- --------- SUBSIDIARIES: Allied Concrete & Materials Co. Arizona 100 Allied Concrete, Inc. Arizona 100 Atlantic Granite Company South Carolina 66-2/3 Azusa Rock, Inc. California 100 Callaway Chemical Company New Jersey 100 Callaway Chemical De Mexico S DeRL DE CV Mexico 100 Callaway Chemical Limited British Columbia 100 CalMat Co. Delaware 100 CalMat Co. of Arizona Arizona 100 CalMat Co. of Central California California 100 CalMat Co. of New Mexico New Mexico 100 CalMat Land Co. California 100 CalMat Leasing Co. Arizona 100 CalMat Properties Co. California 100 Graves W. Yates Transportation, Inc. Texas 100 Kirst Construction Co., Inc. California 100 Palomar Transit Mix Co. California 100 R.C. Fulfer Company, Inc Texas 100 RECO Transportation, LLC Delaware 100 Reliance Transport Co. California 100 Rio Norte Este Co. California 100 River Bend Corp. California 100 Sanger Rock and Sand California 100 Sloan Canyon Sand Co. California 100 Statewide Transport, Inc. Texas 100 Triangle Rock Products, Inc. California 100 Vulcan Aggregates Company, LLC Delaware 100 Vulcan Chemicals Investments, LLC Delaware 100 Vulcan Chemical Technologies, Inc. Delaware 100 Vulcan Chloralkali, LLC Delaware 51 Vulcan Construction Materials, LP Delaware 100 Vulcan/ICA Distribution Company (Partnership) Texas 51 Vulcan Gulf Coast Aggregates, Inc. New Jersey 100 Vulcan Gulf Coast Materials, Inc. New Jersey 100 Vulcan International, Ltd. U.S. Virgin Islands 100 Vulcan International Holdings ApS Denmark 100 Vulcan Lands, Inc. New Jersey 100 Vulcan Materials Finance Company Tennessee 100 Vulcan Shipping Company, Limited Bahamas 50 Vulcan Soda Ash Company California 100 Wanatah Trucking Co., Inc Indiana 100 Western Environmental Contracting, Inc. California 100