Renovations include masonry work, new roofing and window work. A capitol idea Type 27 wheels are for metal and masonry work in sizes ranging from 3-9 in diameter, and Type 28 wheels are specially shaped for flat or corner grinding, and are available in 7 and 9 diameters.
Karst is a type of landscape where the dissolving of the bedrock has created sinkholes, sinking streams, caves, springs, and other characteristic features. Karst is associated with soluble rock types such as limestone, marble, and gypsum.
Sinkholes also form from human activity, such as the collapse of abandoned mines and salt cavern storage in salt domes in places like Louisiana, Mississippi and Texas. More commonly, sinkholes occur in urban areas due to water main breaks or sewer collapses when old pipes give way.