A sinkhole is a depression in the ground that has no natural external surface drainage. Basically, this means that when it rains, all of the water stays inside the sinkhole and typically drains into the subsurface.
Sinkholes are most common in what geologists call, “karst terrain.” These are regions where the types of rock below the land surface can naturally be dissolved by groundwater circulating through them. Soluble rocks include salt beds and domes, gypsum, and limestone and other carbonate rock. The southeast US, for instance, is an area largely underlain by limestone and is highly susceptible to sinkholes.
When water from rainfall moves down through the soil, these types of rock begin to dissolve. This creates underground spaces and caverns.
Sinkholes are dramatic because the land usually stays intact for a period of time until the underground spaces just get too big. If there is not enough support for the land above the spaces, then a sudden collapse of the land surface can occur.
Repairs done right
Pro-Seal Asphalt has a quick response to assist in repairing the sinkhole area and making future repairs to the base underneath the affect area to assist in preventing future sinkholes in that area. The largest mistake an owner faces is not immediately correcting the damage under the asphalt.
At the first sign of asphalt failing due to a sinkhole, contact us.