The Unofficial
I-26 Construction
Madison County
North Carolina
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This photo was taken at the top of Buckner Gap on the east side. The rock there has been highly fractured, either from the contractor using too much explosive or the rock being naturally like this. Either way, a rock nail wall has to be constructed to keep pieces from falling out and down the 200' slope to the highway below. The metal rods sticking out from everywhere in the photo are drilled into the rock and grouted in place; then a wire mesh will be stretched between them and gunite (a liquid concrete) will be sprayed over the mesh. This will seal all the loose pieces of rock together and provide stability to this area. Photo taken by Scott Hidden of NCDOT's Soil Unit in October 2000.


 
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John Lansford
5 November 2000