Contractors on the centerpiece of San Francisco’s $4.6-billion improvement to the Hetch Hetchy Water System were given notice to proceed on April 1. The five-mile subterranean Bay Division Water Delivery Tunnel planned for under the San Francisco Bay will replace two 1920s and 1930s era pipelines with one 9-ft-dia welded steel pipeline bored as deep as 100 ft under the bay’s floor. The new tunnel will be more secure in an earthquake and a tunnel-boring machine will minimize environmental damage. A joint venture of Michels Corp., Brownsville, Wis., Jay Dee Contractors, Inc., Livonia, Mich., and Frank Coluccio Construction Co., Seattle,
The growing need to collect, store and analyze the huge volumes of data collected from infrastructure project stakeholders is generating a new growth area for construction-sector firms, IT vendors and professionals.