Date: 12/31/1969 Views: 5617
Date: 12/31/1969 Views: 3788
Date: 03/19/2007 Views: 4937
Date: 08/23/2023 Views: 703447
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.