Video: Huge sinkhole swallows part of football stadium at a Tennessee university
Engineers have been working to close a cavernous sinkhole that swallowed part of the end zone of a Tennessee university's football stadium.
The 40-foot-wide and 40-foot-deep chasm appeared at the Austin Peay State University in Clarksville on Monday when a construction crew attempted to fill in a much smaller hole that was discovered during renovation on the stadium.
Bill Persinger, a spokesperson for the university, said: "as they began digging, it became bigger and bigger and bigger”. Engineers are now working towards a solution to permanently fix the stadium.
Sinkholes are common where the rock below the land surface is limestone, carbonate rock, salt beds, or rocks that can naturally be dissolved as groundwater circulates through them, according to the US Geological Survey.
As the rock dissolves, spaces and caverns develop underground.