Date: 10/22/2006 Views: 6282
Date: 02/04/2009 Views: 7084
Date: 10/30/2007 Views: 7897
Date: 08/23/2023 Views: 719218
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.