Codding Enterprises, A California Limited Partnership, 1400 Valley House Dr, Rohnert Park, CA 94928, US

The Dutra Group provides dredging, marine construction, aggregate manufacturing and transportation. It consists of Dutra Dredging and Dutra Materials. Dutra Dredging s fleet of equipment has been dispatched throughout the continental United States, Pacific Rim and Middle East. It provides service for public and private sector clients. Dutra Materials has aggregate reserves in the San Francisco Bay area. The company s rock quarry in San Rafael, Calif., has more than 50 million tons of aggregate reserves. It accommodates the manufacturing of products for the road industry, the ever-expanding regional infrastructure and the protection of delta waterways and shorelines. Dutra Materials lies in the San Francisco Bay region, with a large percentage of its work and materials handling conducted by barge and floating equipment.