LIRR Post Avenue Railroad Bridge Engineering

Standout Features

McLaren Engineering Group provided bridge engineering design services for this $9.7 million project to replace the Post Avenue Bridge in Westbury, NY – which serves as a connector for the Long Island Rail Road. The 60-foot single-span structure was originally built in 1914. Its two tracks were supported by steel plate girders, with a deck and reinforced abutments made of concrete.

The McLaren Difference: Applied Ingenuity

As Engineer of Record, McLaren was responsible for completing the final design by expanding preliminary work developed during the RFP process. McLaren designed the replacement of the two-track bridge with a three-track bridge, and increased the vertical clearance to 14 feet, to reduce outages with orchestrated precision. The abutments were replaced and strengthened, and the new bridge was replaced in 36 hours with self-propelled modular transporters (SPMTs). This project was awarded the 2020 Engineering Excellence Platinum Award in Category C: Structural Systems by the ACEC New York and the 2018 Project of the Year by the American Society of Civil Engineers, Long Island Branch.