Date: 12/31/1969 Views: 3012
Date: 04/15/2005 Views: 2767
Date: 12/31/1969 Views: 3048
Date: 08/23/2023 Views: 159518
The area where the tie bar passes through a depression in the tunnel has to be prepared for closure. The tunnel depression with the areas of fiberglass and foam core removed in preparation for closure.