Date: 12/31/1969 Views: 2902
Date: 07/10/2004 Views: 3589
Date: 03/10/2011 Views: 1917
Date: 08/23/2023 Views: 182740
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.