Date: 12/31/1969 Views: 4135
Date: 08/30/2007 Views: 4782
Date: 12/31/1969 Views: 4106
Date: 08/23/2023 Views: 797872
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.