Bridge Demand Response Contract: Empire Rail Trail Project

Bridge Demand Response Contract: Empire Rail Trail Project

Schenectady County, New York


Objective: Construction of a 5-mile bike path, with the installation of a concrete tunnel under the active railroad.

Project Scope:

DAC worked to install 5 miles of a new bike path for the Empire Rail Trail Project. Within this 5-mile stretch a 16’ x 16’ x 110’ long concrete tunnel needed to be installed underneath an active railroad to connect the trail.

Several methods of construction were used to support the existing railroad line while the tunnel was pulled under the active railroad embankment as an open-cut method was not feasible.

Examples of these methods/tasks are site clearing, mass excavation, jack and bore, pile driving, soil nail/shotcrete work, soil grouting, structural fabrication, paving, rebar installation, and mass concrete placement.

Weighing in at over 2 million pounds, the concrete tunnel was pulled around the clock underneath the railroad using six hydraulic tendon jacks. As the tunnel was pulled through the railroad embankment, an excavator and conveyor system inside the tunnel removed soil to progress the tunnel to the opposite side.



Engineer News Record | Regional Best Projects: 2021 NYS Small Project Winner


Tunnel Jacking

Concrete Construction

Sheet Piling



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