Chesapeake Bay Bridge and Tunnel - HRTPO

Chesapeake Bay Bridge and Tunnel

Parallel Thimble Shoal Tunnel Project

November 19, 2020

17.6 miles

(28 km)

Atlantic

Ocean

Chesapeake Bay

Bridge-Tunnel

Norfolk

Newport

News

Virginia Beach

Project Location

Chesapeake

Bay

Chesapeake Channel Tunnel

Thimble Shoal Channel Tunnel

Parallel Crossing – Phase II

• Existing Immersed Tube Tunnel (ITT)

• Bi-Directional Traffic

• Travel delays due to congestion, permit loads (oversized) and maintenance needs

• New tunnel will provide 2-lanes southbound

• Existing tunnel to be 2-lanes northbound

Existing Thimble Shoal Tunnel

Parallel Thimble Shoal Tunnel

Project Overview

One Island Two IslandNavigation

Channel

+30

-134

6,350-ft Tunnel Bore

Roadway

6,525-ft Portal-to-Portal

Project-at-a-Glance

• D-B contract value: $756m

• Length of Tunnel: 6,525-ft Portal-to-Portal

• Diameter of Tunnel: 43-ft Outside Diameter

• Tunnel Boring Machine: Herrenknecht EPB machine

• Segment Ring: 9+1 universal ring

• Roadway Depth: 134-ft below MLLW

• Contractor: Chesapeake Tunnel JV

(Dragados USA and

Schiavone Construction Co.)

• Engineer of Record: Mott MacDonald

• Owner’s Engineer: Jacobs

• Construction Manager: HNTB

Parallel Thimble Shoal Tunnel Project

Parallel Thimble Shoal Tunnel Project

Tunnel Segments

Parallel Chesapeake Tunnel Project

Proposed Parallel Chesapeake Tunnel

Existing Chesapeake Tunnel

Three Island Four Island

Parallel Chesapeake

Tunnel Project

• Preliminary Planning

• NEPA

• Geotechnical Investigation

• Technical Requirements

• Financing Plan

• Construction (2024 – 2029)