Date: 08/31/2007 Views: 3691
Date: 09/26/2009 Views: 2871
Date: 09/21/2006 Views: 5039
Date: 08/23/2023 Views: 184136
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.