- Our mission is to provide quality Sand & Gravel and Ready Mix concrete products to the complete satisfaction of the customer, at a reasonable price with regard to the safety of our employees, customers and the community. Sales (800) 686-6812 Beaver Dam Plant 1000 Biasi Ranch Road Beaver Dam, AZ 86432 (520) 347-5512 P.O.Box 578 Stanton, CA 90680 Fax (714) 894-7699 Tel: 714-894-1988 Tri State ...www.tristatematerials.com