Presidio Parkway Phase II, Public-Private Partnership
Location: San Francisco, CA
Contractors: Flatiron West, Inc. and Kiewit Infrastructure West Co.
Subcontractors: Case Pacific Company and Malcolm Drilling Company, Inc.
San Francisco’s Presidio Parkway replaced Doyle Drive. The new parkway, designed to fit within the natural contours of the Presidio of San Francisco and the Golden Gate National Recreation Area, now acts as a spectacular regional gateway to these city landmarks.
In keeping with its high standards for environmental stewardship and impact, Central Concrete erected an onsite portable plant. This innovative solution significantly reduced truck travel distances, thereby minimizing Central Concrete’s carbon footprint and traffic impacts.
Initiating pours July 12, 2013, and ramping up significantly over the years, Central Concrete delivered approximately seven mixes, totaling just over 131,000 cubic yards of concrete. Nearly 90% of Central Concrete’s mixes incorporated at least 50% cement replacement materials. As a result, these low-CO2 concrete mixes significantly reduced the carbon footprint, compared to traditional mixes, delivering an estimated savings of 42.8 million pounds of CO2.