Major Tunnel Projects

Last Updated: 03/10/2008

• Tunnels Under Construction
  • Central Artery Tunnels, MA - The project spans 7.8 miles of highway, 161 lanes miles in all, about half in tunnels.
  • No Name Tunnel Rehabilitation, CO - Existing 2-bore tunnel, 2-lane each bore, 1045 ft long.
  • Devils Slide Tunnel, CA - Two 4,000-foot tunnels would be built between Pacifica and McNee Ranch State Park in Montara, bypassing a 1.2-mile stretch of Highway 1
  • PR Route 53 Tunnel, PR - Two tunnels 2 lanes each direction, approximately 800 M long. Tunnels will be built in two phases, phase one; excavation and support of excavation, phase two; lining and finishes. Phase 1 completed. Phase 2 is under construction.
  • Wheeling Tunnel, WV - Finishes and systems are being rehabilitated.
  • Rehabilitation of the I-77 Mountain Tunnels (Big Walker Mountain Tunnel and East River Mountain Tunnel), VA - The $16.5 million project to restore both tunnels began in May 2006. The contract calls for: Foundation and structural refurbishment, Ventilation, Drainage and sidewalk repairs, Replacement of the tile on the tunnel walls. The project is scheduled for completion in summer 2008.
• Tunnels Under Design
  • Coronado Tunnel, CA - The City of Coronado is looking to build two tunnels from the existing Coronado Bridge to the San Diego Naval station.
  • Port of Miami Tunnel, FL - Twin barrel, 4-lane, subaqueous tunnel from the Port of Miami (formerly Dodge Island) to the mainland.
  • Drumanard Tunnel, Louisville, KY - Extension of I-265 from I-71 to the proposed Ohio River Bridge approximately 1.7 miles including a partial interchange with US 42 and a 2000 ft. tunnel under US 42 and the Drumanards Estate Historic property.
• Tunnels in Conceptual Stages
  • LBJ Corridor Study, TX - Consists of constructing 6-HOV lanes including two, 3-lane tunnels, that are approximately 2-1/2 miles long, within the median of the existing LBJ Expressway. TxDOT's website: http://www.dot.state.tx.us/services/texas_turnpike_authority/i635_proposal.htm
  • Gowanus Expressway Tunnel Alternatives, NY - (Conceptual Design) the Gowanus Expressway Tunnel Alternative consists of replacing the existing elevated Gowanus Expressway (Brooklyn, NY) with two tunnels.
  • I-664 Tunnel, Hampton Roads 3rd Harbor Crossing, VA - New Bridge Tunnel crossing parallel to existing I-64 Hampton Roads Bridge Tunnel and widens I-64 to 8 lanes and 2 multimodal lanes from the I-664 interchange in Hampton to the I-564 interchange in Norfolk. Tunnel will be a subaqueous concrete or steel tube approximately 39 m wide by 12 m high tube. Project is on Hold: Public-Private Transportation Act Proposals are no longer under consideration.
  • Midtown Tunnel, VA - The Midtown Tunnel is located from the interchange of the MLK (Route 58) and Western freeways in Portsmouth to Brambleton Avenue in Norfolk. The project consists of modifications to the existing tunnel and construction of a new tunnel under the Elizabeth River, running parallel to the existing Midtown Tunnel. This will provide for east-west travel, linking Route 58 and the Western Freeway in Portsmouth to Brambleton Avenue in Norfolk.
  • Martin Luther King (MLK) Freeway Extension, VA - The MLK Freeway Extension consists of extending the freeway south, with a new interchange at Interstate 264 (a four-lane, limited access freeway) to provide a direct connection from I-264 to the Midtown Tunnel between Portsmouth and Norfolk.
  • Downtown Tunnel, VA - The Downtown Tunnel on I-264 crosses the Southern Branch of the Elizabeth River in the South Hampton Roads area. It links the Portsmouth with Norfolk. Along with the Berkley Bridge, the Downtown Tunnel connects to Interstate 464 to Chesapeake and a continuation I-264 to the downtown and Waterside areas of Norfolk, and on to Virginia Beach. The project consists of modifications to the existing tunnel.
  • Aspen Approach Tunnel, CO
  • Caldecott 4th Bore, CA