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Sinkhole
Sinkholes are often the result of subsurface drainage that erodes the underlying support substructures of the pavement. Over time, this erosion results in a cavity underneath the pavement.
Sinkholes are often observed as an area that has a sudden and often significant drop in elevation, sometimes resulting in a complete open cavity that may pose significant liability risk.
Sinkholes located in the drive lanes that support significant traffic should be repaired immediately as they can result in significant failures overnight.
It is crucial to ensure that root cause is properly identified and repaired while repairing the sinkhole itself. Often times these types of failures can be caused by plumbing, sewer, or drainage leaks. Additional causes may be drainage avenues opening along laid utility lines underground.