The Parallel Thimble Shoal Tunnel Project will construct a new two-lane tunnel under Thimble Shoal Channel. When complete, the new tunnel will carry two lanes of traffic southbound and the existing tunnel will carry two lanes of traffic northbound.
- Tunnel Length: approximately one mile
- Inner Diameter (prior to roadway and support structure
- installation): 39 feet
- Outer Diameter: 42 feet
- Construction Cost: $755,987,318
- Construction Method: Bored tunnel
Construction Start (estimate): October 1, 2017
Construction Completion (estimate): October 1, 2022
Maximum Tunnel Depth (Crown – at its deepest location (mid-channel)): 105 feet below the water surface
Maximum Tunnel Depth (Invert – from the top of the roadway at its deepest location): 134 feet below the surface
- Soil Removal: The approximate amount of soil to be removed by the Tunnel Boring Machine (TBM) is 500,000 cubic yards.
- Concrete Sections: The tunnel will consist of approximately 9,000 individual concrete pieces. Approximately 42,000 cubic yards of concrete will be needed to make the tunnel sections.
Design-Build Team: Chesapeake Tunnel Joint Venture: Dragados USA and Schiavone Construction Company, LLC
Demonstrative Video: To learn more about tunnel boring machines and to view a demonstrative video, click here.
TBM Manufacturer: Herrenknecht of Germany
TBM Naming Contest: In keeping with tunneling tradition, the CBBT will be hosting a TBM Naming Contest. This contest will be open to all 6th grade students who attend a school located within one of the following locales: Virginia’s Accomack and Northampton Counties and the Cities of Chesapeake, Hampton, Portsmouth, Newport News, Norfolk and Virginia Beach. For more contest information and rules, click here.
The Parallel Thimble Shoal Tunnel Project will be funded through a variety of means, including 1) the sale of revenue bonds, 2) TIFIA loan, 3) VTIB loan, and 4) monies from the District’s General Fund.