Manhattan Tunnel Project

The Manhattan Tunnel Project will build approximately 750 feet of twin tunnels and protect existing sewer lines and utilities to ensure they are not disrupted by tunnel boring.

The project also includes designing and building an access shaft at 12^th Avenue that will be used to remove the tunnel boring machines that build the portion of the tunnel under the Hudson River and then converted into a permanent ventilation facility for the new tunnel.

Construction Approach

Due to the presence of historic fill along Manhattan’s western shore, the Manhattan Tunnel Project requires complex tunneling activities.  

To provide the flexibility needed, the selected contractor has proposed excavating the tunnel using a digger shield.

This will enable the majority of construction to take place underground, improving safety and significantly reducing the impacts of construction on surface roads and sidewalks.

Quick Facts

Project Purpose

• Build the portion of the new tunnel tubes connecting to HYCC-3
• Protect existing utilities and sewer lines
• Remove obstructions that could slow or damage TBMs
• Construct a new access shaft/ventilation shaft

Notable Elements

• 750 feet of twin 30-foot diameter tunnels
• Requires complex tunnelling to navigate sewer lines, the Manhattan bulkhead, and other obstructions
• Most construction will take place underground, limiting impact on surrounding community

Estimated Construction Completion

• 2029

Contact Information

• Phone: 1-800-239-9497

• Email: ManhattanConstruction@gatewayprogram.org

Upcoming Construction

• Long-Term Closure of 29th Street to Through Traffic
• Long-Term Sidewalk Closure/Pedestrian Detour and Parking Removal
• Temporary Lane Closures, Curbside Parking Removal, and Sidewalk Closure