Maynardville Highway re-open after sinkhole repairs
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KNOXVILLE (WATE) - All lanes of Maynardville Highway are re-open Tuesday after crews finished repairs to a sinkhole in Halls.
The problem area was at mile marker 15.8 at Mill Branch Drive. The sinkhole was in the southbound lane.
Crews filled in the sinkhole Monday afternoon. They'll patched the area with asphalt on Tuesday morning.
George Danker, a geologist with the Tenens see Department of Transportation, said the problem caused by the rock structure underneath the surface, which is close to the road.
"What we call piping, or channeling, water around a rock that is in the subsurface and eating away the clay around it and forming a void," Danker explained. "When the void gets so large and you have a weight over it, it collapses"
Workers cleaned out the hole, then filled it with a combination of rock, clay, and gravel.
The sinkhole measured 2 1/2 feet wide, 3 feet long and 3 feet deep before repairs.
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