The prestigious 2020 Heavy Civil Over $100 Million Constructor Award was presented to Flatiron West, Inc. for their work on the Route 210 Roadway Rehabilitation project. The Route 210 Roadway Rehabilitation project extended pavement life, improved traffic operations, and enhanced safety in a highly visible, dense urban area of Los Angeles County.
The $126 million project rehabilitated 77 lane miles of distressed pavement sections that had been subjected to heavy traffic loading. It also enhanced roadway elements, lighting, electrical systems, and signage. Flatiron West, Inc. and the California Department of Transportation partnered to develop and implement the most cost-effective approach. They identified opportunities to improve constructability and quality while saving money by selecting alternate paving types and adjusting the construction approach. These changes maximized service life and quality and allowed Caltrans to add scope using the cost savings, while reducing the need for future repairs.
The technically challenging project removed and replaced approximately 400,000 square yards of pavement slabs, replaced approach slabs at 16 bridges, and included more than 900,000 square yards of diamond grinding work over 9.7 miles. Flatiron constructed 11 types of pavement — some experimental — including precast jointed plain concrete, two-lift composite pavement, continuously reinforced concrete pavement, and jointed plain concrete pavement.
The project exemplifies one of the most significant uses of precast highway pavement slabs in the U.S. Using a host of innovative technical methods and construction approaches, Flatiron finished the project on schedule and within budget.