Date: 01/03/2010 Views: 6149
Date: 06/28/2008 Views: 5525
Date: 07/05/2007 Views: 5912
Date: 08/23/2023 Views: 830976
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.