Rail bridge pushed into place on LIRR Expansion Project

Written by RT&S Staff
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Metropolitan Transportation Authority Construction & Development recently pushed the first of two bridges into place on Willis Avenue under the Oyster Bay branch.

A second bridge will be pushed into place under the main line during the weekend of July 10. The two underpasses are the last to be constructed as part of the LIRR Expansion Project and the only one eliminating two grade crossings at once.

Hydraulic jacks push the bridge under the Oyster Bay branch 20 in. with each stroke.

The grade crossings were closed in November and over the past few months crews installed support of excavation (SOE) walls, excavated more than 6,000 cu ft of soil for the undergrade roadway and constructed the 300-ton bridges on the site. The Oyster Bay bridge “U” Structure—including steel, concrete abutments, and floor slabs—weigh nearly 1,500 tons. 

A backhoe clears the way for the bridge to be pushed in.

During the past weekend, tracks, supporting soil and SOE on the Oyster Bay branch at Willis Avenue were removed. A series of hydraulic jacks then pushed the bridge into place 20 in. at a time before having to be reset. The structure was moved a total of 67 ft into place. LIRR crews then installed electric, communications, and power systems and restored service in time for Monday morning’s peak commute on June 28.

Bridge pushed in place and ready for Monday morning peak service.

The grade-crossing eliminations will enhance safety, reduce noise and air pollution, and reduce traffic back-ups, as vehicles will no longer need to wait at crossings as trains pass, which can be as much as 35% of the time during rush hours. Warning bells on crossing gates will be eliminated and passing trains will no longer need to sound their horns, enhancing the community’ s quality of life.

The roadway is expected to reopen in fall of 2021.

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