Date: 11/07/2009 Views: 3470
Date: 09/30/2007 Views: 2833
Date: 03/22/2009 Views: 2822
Date: 08/23/2023 Views: 86386
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.