Date: 12/31/1969 Views: 4040
Date: 12/31/1969 Views: 3765
Date: 10/27/2009 Views: 6159
Date: 08/23/2023 Views: 707345
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.