NYTCA- Subway Tunnel Structural Rehabilitation
4th Avenue Line
Project Description
This project involved the structural repairs and replacement of the existing deteriorated columns, roof girders and 18 vent structures of the subway box structure under 4th Avenue, for a distance of one mile from 39th to 60th Streets.
There are four subway tracks within the work limits – two local and two express tracks. During an 11-month period (June 2018 – June 2019) the express tracks were taken out of service in order to perform the rehabilitation work.
El Sol Contracting performed the work under an aggressive timetable utilizing multiple daily shifts, six to seven days per week, managing over 100 craft employees each day.
With only four months left of the original 11-month track shutdown, additional steel and concrete repairs worth $23M were added to the Contract with no additional time added to the original duration. El Sol increased efforts and successfully performed all the work during this high intensity period and finished on schedule.
Key Elements
Installation of demolition shield/barriers between active tracks and the work area
New and retrofit structural steel erection (364 Columns and 726 Roof Girders)
Structural lifting under dead and live load conditions
Structural steel repairs
Shotcrete repairs to concrete walls and roof
Lead abatement and painting
Maintenance and Protection of Traffic for lane closures on 4th Avenue
Project Information
Location Brooklyn, NY
Contract type Design-Bid –Build
Owner New York City Transit Authority
Designer New York City Transit Authority
Value $83.7M
Status Completion Date November 2019
Let’s Build Together
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