Many different types and brands of conditioners are used in tunneling based upon soil conditions present along the alignment. Conditioners are generally categorized as foams, polymers […]

The tunnel would be designed for seismic ground motions and forces generated using state-of-the-art seismic design modeling. Applicable engineering factors of safety for these dynamic forces […]

The greatest ground motions in a seismic event would occur near the ground surface. At the depths of the TBM and tunnel, the structure would probably […]

The applied TBM face pressure would be balanced against the soil and groundwater pressure by the TBM operator.

The greatest ground motions in a seismic event would occur near the ground surface. At the depths of the TBM and tunnel, the structure would probably […]

The equipment placed in the tunnel behind the TBM would include ventilation equipment, as will be discussed in upcoming Stakeholder Engagement Committee meetings.

During construction, gas detection methods will be used for flammable gasses. The potential condition for encountering a gas or oil pocket is covered under the Tunnel […]

During the design phase, there will be an exploration program to identify and detect buried and/or abandoned water, natural gas and oil wells to allow for […]

Specific construction sites are still being identified. However, based on the tunnel launch shaft areas presented at the Stakeholder Engagement Meeting on February 12, 2020, the […]