Tuscarora Tunnel Rehabilitation Project

Pennsylvania Turnpike Commission

Tunnel Rehabilitation Design Services:

The Tuscarora Tunnels consist of individual two-lane highway tunnels through the Tuscarora Mountain between Huntingdon and Franklin Counties in rural Pennsylvania. The eastbound (EB) tunnel was constructed between 1938 and 1940, while the westbound (WB) tunnel is newer – constructed between 1962 and 1968. Each tunnel is approximately 5,326 feet (1,623 meters) in length with portal buildings on each end, where the mechanical systems are housed. The Pennsylvania Turnpike Commission (PTC) has commissioned several studies as part of a rehabilitation project for the tunnels, which are experiencing significant groundwater infiltration and deterioration.

Gall Zeidler Consultants (GZ), as part of the design team, provided the PTC with multiple options for the removal of the existing deteriorating ceiling, the installation of a new ceiling, upgrading the lighting and fire safety systems, waterproofing and wall repairs, roadway drainage and tunnel entrance improvements. One option for the rehabilitation includes the complete removal of the existing ceiling and the installation of a new waterproofing, drainage system and shotcrete final lining with lattice girders providing a template for the shotcrete application.

Fannettsburg, Pennsylvania USA
2013 – Present
Two Twin Tunnels
5,326 Feet (1,623 Meters) Each
815 Square Feet (76 Square Meters) and 1,118 Square Feet (104 Square Meters)
Oswego & Juniata Formations (Red Fine To Medium Grained Sandstone); Tuscarora Formation (White Quartzitic Sandstone And Quartzite)
Gannett Fleming
Pennsylvania Turnpike Commission